Small driving motor for electric moped

Abstract

The utility model relates to the technical field of electric mopeds, and discloses a small-sized driving motor for an electric moped.The small-sized driving motor for the electric moped.The small-sized driving motor for the electric moped.The small-sized driving motor for the electric moped.The small-sized driving motor for the electric moped.The small-sized driving motor comprises a shell, end covers are detachably installed at the two ends of the shell through bolts, and a main shaft is rotationally installed between the shell and the two end covers; a stator is installed in the middle of the interior of the shell. According to the small driving motor for the electric moped, the heat dissipation fins are used for improving the heat dissipation effect of the motor and can automatically drive the heat dissipation fan blades to rotate in the working process of the motor, flowing exchange of air inside and outside the motor is accelerated, heat dissipation of the interior of the motor is better facilitated, and meanwhile the heat dissipation effect of the motor is improved. When the motor is cooled, air entering the shell can be subjected to multiple filtration and adsorption through the filter screen, the activated carbon screen printing plate and the drying agent net bin, so that the dryness and cleanliness of the air entering the shell are guaranteed, heat dissipation of the motor is guaranteed, and meanwhile the invasion influence of external impurities is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric assist vehicles, in particular to a small drive motor for electric assist vehicles. Background Technique

[0002] With the rapid development of the electric assist vehicle industry, as a core power component, the performance, efficiency and reliability of small drive motors have a crucial impact on the performance of the whole vehicle. At present in the market, many small drive motors used in electric assist vehicles often face the problem that it is difficult to balance sealing and heat dissipation in design.

[0003] In view of the above and existing related technologies, the inventor believes that there are often the following defects: In the design of traditional small drive motors, in order to ensure the stability of the internal structure and prevent external impurities (such as dust and water vapor) from invading, a relatively tight sealing structure is usually adopted. While this sealing design effectively blocks external impurities, it also limits the effective dissipation of heat inside the motor, resulting in the motor being in an environment with a relatively high temperature during operation. The too high temperature not only accelerates the aging of the motor, but also cannot ensure the stability of the motor during operation.

[0004] Therefore, we propose a small drive motor for electric assist vehicles. Content of the Utility Model

[0005] In view of the problem that the above existing motors usually adopt a relatively tight sealing structure, while this sealing design effectively blocks external impurities, it also limits the effective dissipation of heat inside the motor, resulting in the motor being in an environment with a relatively high temperature during operation, and the too high temperature not only accelerates the aging of the motor, but also cannot ensure the stability of the motor during operation, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a small drive motor for electric assist vehicles, and its purpose is: while ensuring that dust and water vapor enter the inside of the motor, it also improves the heat dissipation performance of the motor.

[0007] To solve the above technical problems, the present utility model provides the following technical solution: A small drive motor for electric assist vehicles, including a housing, both ends of the housing are detachably installed with end covers through bolts, a main shaft is rotatably installed between the housing and the two end covers, a stator is installed in the middle of the housing interior, a rotor is sleeved on the middle of the outer wall of the main shaft and inside the housing, and a round hole for the main shaft to pass through is opened at the center of one side of the end cover;

[0008] Both ends inside the housing are equipped with water-blocking plates. At a position above one side of the water-blocking plate, a first ventilation groove is opened. A first perforated plate is welded inside the first ventilation groove. A heat dissipation fan blade is sleeved on one side of the outer wall of the main shaft and inside the corresponding end cover. At a position below one side of the end cover, a second ventilation groove is opened. A second perforated plate is fixed inside the second ventilation groove.

[0009] As a preferred solution of the small drive motor for an electric power-assisted vehicle described in the present invention, wherein: Convex rings are welded on both sides inside the housing, and the stator is located between the convex rings on both sides. The water-blocking plate on the same side is detachably connected to the convex ring.

[0010] As a preferred solution of the small drive motor for an electric power-assisted vehicle described in the present invention, wherein: A circle of magnet blocks is inlaid and installed along the outer edge of one side of the water-blocking plate close to the convex ring. The convex ring is made of an iron plate, and the magnet blocks are magnetically adsorbed to the convex ring.

[0011] As a preferred solution of the small drive motor for an electric power-assisted vehicle described in the present invention, wherein: A fixed edge is welded at one end of the end cover close to the housing. A circle of fixing holes is opened on the fixed edge. Threaded holes are opened at both ends of the housing, and locking bolts are installed with internal threads in the threaded holes.

[0012] As a preferred solution of the small drive motor for an electric power-assisted vehicle described in the present invention, wherein: A rain shield for shielding the second ventilation groove is welded at a position of the end cover far from the housing and facing the second ventilation groove. An air inlet opening is opened at the bottom of the rain shield. A filter screen is fixed at the air inlet opening at the bottom of the rain shield.

[0013] As a preferred solution of the small drive motor for an electric power-assisted vehicle described in the present invention, wherein: A filtering member is fixed on the inner wall surface of the end cover at a position facing the second ventilation groove. The filtering member includes an activated carbon mesh plate fixed on the inner wall surface of the end cover. A desiccant mesh bin is fixed at one end of the activated carbon mesh plate close to the housing, and desiccant particles are filled in the desiccant mesh bin.

[0014] As a preferred solution of the small drive motor for an electric power-assisted vehicle described in the present invention, wherein: A group of heat dissipation fins is welded at a position above the second ventilation groove at the end of the end cover far from the housing. The heat dissipation fins are made of an aluminum alloy plate.

[0015] The beneficial effects of the present invention:

[0016] 1. In the present invention, the water-blocking plate and the convex ring are fixed magnetically, which is convenient for detaching the water-blocking plate from the convex ring, so as to facilitate the maintenance of the stator inside the housing.

[0017] 2. For this utility model, the heat dissipation fins are used to improve the heat dissipation effect of the motor. During the operation of the motor, they will automatically drive the heat dissipation fan blades to rotate, accelerating the flow and exchange of air inside and outside the motor, which is more conducive to the heat dissipation inside the motor. At the same time, the air entering the inside of the housing will pass through the filter screen, activated carbon mesh plate and desiccant mesh bin for multiple filtration and adsorption to ensure the dryness and cleanliness of the air entering the inside of the housing. While ensuring the heat dissipation of the motor, it also avoids the intrusion of external impurities. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of a small drive motor for an electric power-assisted vehicle of this utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the housing and the main shaft of a small drive motor for an electric power-assisted vehicle of this utility model.

[0021] Figure 3 It is a schematic diagram of the internal structure of the housing of a small drive motor for an electric power-assisted vehicle of this utility model.

[0022] Figure 4 It is a schematic diagram of the internal structure of the end cover of a small drive motor for an electric power-assisted vehicle of this utility model.

[0023] Figure 5 It is a schematic diagram of the structure of the end cover of a small drive motor for an electric power-assisted vehicle of this utility model.

[0024] Figure 6 It is a schematic plan view of the end cover of a small drive motor for an electric power-assisted vehicle of this utility model (excluding the rain shield).

[0025] Description of the Reference Numerals:

[0026] 1. Housing; 2. End cover; 3. Main shaft; 4. Water blocking plate; 5. Heat dissipation fan blade; 6. Ventilation groove 1; 7. Mesh plate 1; 8. Convex ring; 9. Stator; 10. Rotor; 11. Desiccant mesh bin; 12. Activated carbon mesh plate; 13. Round hole; 14. Filter element; 15. Heat dissipation fin; 16. Fixed edge; 17. Rain shield; 18. Filter screen; 19. Ventilation groove 2; 20. Mesh plate 2. Detailed Embodiment

[0027] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings of the specification.

[0028] Referring to Figure 1-6 , which is the first embodiment of the present utility model, a small drive motor for an electric assist vehicle is provided. Such a small drive motor for an electric assist vehicle includes a housing 1, and both ends of the housing 1 are open. Both ends of the housing 1 are detachably installed with end caps 2 through bolts. A main shaft 3 is rotatably installed between the housing 1 and the two end caps 2. A stator 9 is installed in the middle of the interior of the housing 1. A rotor 10 is sleeved on the middle part of the outer wall of the main shaft 3 and is located inside the housing 1. A circular hole 13 for the main shaft 3 to pass through is opened at the center of one side of the end cap 2.

[0029] Water blocking plates 4 are installed at both ends of the interior of the housing 1, and a central hole for the main shaft 3 to pass through is opened at the circular part of the water blocking plate 4. A ventilation slot one 6 is opened at the upper position on one side of the water blocking plate 4. A mesh plate one 7 is welded inside the ventilation slot one 6. A heat dissipation fan blade 5 is sleeved on one side of the outer wall of the main shaft 3 and is located inside the corresponding side end cap 2. A ventilation slot two 19 is opened at the lower position on one side of the end cap 2. A mesh plate two 20 is fixed inside the ventilation slot two 19.

[0030] Heat dissipation fins 15 are added to the motor housing to improve the heat dissipation effect of the motor. During the operation of the motor, the heat dissipation fan blade 5 will be automatically driven to rotate, accelerating the flow and exchange of air inside and outside the motor, which is more conducive to the heat dissipation inside the motor. At the same time, the air entering the interior of the housing 1 will be filtered and adsorbed multiple times through the filter screen 18, the activated carbon mesh plate 12, and the desiccant mesh bin 11 to ensure the dryness and cleanliness of the air entering the interior of the housing 1, avoiding the intrusion of external impurities while ensuring the heat dissipation of the motor.

[0031] Convex rings 8 are welded on both sides inside the housing 1, and the stator 9 is located between the two convex rings 8 on the same side. The water blocking plate 4 on the same side is detachably connected to the convex ring 8.

[0032] A circle of magnet blocks is inlaid and installed on the outer edge of the side of the water blocking plate 4 close to the convex ring 8. The convex ring 8 is made of iron plate, and the magnet blocks are magnetically adsorbed to the convex ring 8. The water blocking plate 4 and the convex ring 8 are fixed by magnetism, which is convenient for detaching the water blocking plate 4 from the convex ring 8, thus facilitating the maintenance of the stator 9 inside the housing 1.

[0033] A fixing edge 16 is welded to the end of the end cap 2 close to the housing 1. A circle of fixing holes is opened on the fixing edge 16. Threaded holes are opened at both ends of the housing 1. Locking bolts are threadedly installed in the threaded holes, and the locking bolts pass through the interior of the fixing holes. The fixing holes and the threaded holes are not shown in the figure.

[0034] At one end of the end cap 2 away from the housing 1 and opposite to the second ventilation groove 19, a rain shield 17 for blocking the second ventilation groove 19 is welded. The interior of the rain shield 17 is in communication with the interior of the second ventilation groove 19. The rain shield 17 blocking the second mesh plate 20 defines the orientation of the air inlet, increasing the difficulty for liquid to pass through the second mesh plate 20 to a certain extent, which is beneficial to reducing the water seepage into the interior of the end cap 2. An air inlet opening is formed at the bottom of the rain shield 17, and a filter screen 18 is fixed at the air inlet opening at the bottom of the rain shield 17. The filter screen 18 filters the air entering the interior of the housing 1 to prevent dust from invading the interior of the housing 1.

[0035] A filter element 14 is fixed on the inner wall surface of the end cap 2 and opposite to the second ventilation groove 19. The filter element 14 includes an activated carbon mesh plate 12 fixed on the inner wall surface of the end cap 2. A desiccant mesh bin 11 is fixed at one end of the activated carbon mesh plate 12 close to the housing 1, and desiccant particles are filled in the interior of the desiccant mesh bin 11. Both the desiccant mesh bin 11 and the activated carbon mesh plate 12 are semicircularly arranged. After the air passes through the second mesh plate 20 and enters the interior of the end cap 2, it is filtered twice by the activated carbon mesh plate 12 and the desiccant mesh bin 11, and the water vapor in the air is adsorbed to improve the dryness of the air.

[0036] A group of heat dissipation fins 15 are welded at one end of the end cap 2 away from the housing 1 and above the second ventilation groove 19. The heat dissipation fins 15 are made of aluminum alloy plates. The heat dissipation fins 15 play a role in cooling and dissipating heat from the end cap 2, and thus play a role in cooling the motor. Moreover, the heat dissipation fins 15 are installed on the side of the end cap 2 without affecting the fixation of the motor on the wheel of the electric scooter.

[0037] During use, the heat dissipated by the motor during operation will come into contact with the housing 1 and the end cap 2 first. The heat dissipation fins 15 play a role in cooling and dissipating heat from the end cap 2.

[0038] When the main shaft 3 rotates, it will also drive the heat dissipation fan blade 5 to rotate. When the heat dissipation fan blade 5 rotates, it will generate a negative pressure suction force, which can pump the outside air into the interior of the end cap 2 through the second mesh plate 20, and then enter the interior of the housing 1 through the first mesh plate 7 to dissipate heat and ventilate the housing 1. The heat dissipation fan blade 5 accelerates the air flow inside the motor, which is conducive to the dissipation of heat inside the motor and improves the heat dissipation effect of the motor.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A small drive motor for an electric power-assisted vehicle, comprising a housing (1), characterized in that: End covers (2) are detachably mounted on both ends of the housing (1) by means of bolts, a main shaft (3) is rotatably mounted between the housing (1) and the two end covers (2), a stator (9) is mounted in the middle of the interior of the housing (1), a rotor (10) is sleeved in the middle of the outer wall of the main shaft (3) and located inside the housing (1), and a circular hole (13) is provided at the center of one side of the end cover (2) for the main shaft (3) to pass through; Water blocking disks (4) are installed at both ends of the shell (1), a ventilation slot (6) is provided at an upper position on one side of the water blocking disk (4), a mesh plate (7) is welded inside the ventilation slot (6), a heat dissipation fan blade (5) is sleeved on one side of the outer wall of the main shaft (3) and located inside the corresponding side end cover (2), a ventilation slot (19) is provided at a lower position on one side of the end cover (2), and a mesh plate (20) is fixed inside the ventilation slot (19).

2. The small drive motor for an electric power-assisted vehicle according to claim 1, characterized in that: Both sides of the housing (1) are welded with convex rings (8), and the stator (9) is located between the convex rings (8) on both sides, and the water blocking disk (4) and the convex ring (8) on the same side are detachably connected.

3. A small drive motor for an electric power-assisted vehicle according to claim 2, characterized in that: A circle of magnet blocks is inlaid and installed on the outer edge of one side of the water blocking disk (4) close to the convex ring (8); the convex ring (8) is made of iron plate, and there is magnetic attraction between the magnet blocks and the convex ring (8).

4. The small drive motor for an electric power-assisted vehicle according to claim 3, characterized in that: A fixing edge (16) is welded to one end of the end cover (2) close to the outer shell (1), and a circle of fixing holes is provided on the fixing edge (16). Threaded holes are provided at both ends of the outer shell (1), and locking bolts are installed in the threads of the threaded holes.

5. The small drive motor for an electric power-assisted vehicle according to claim 4, characterized in that: A rain shield (17) for shielding the second ventilation slot (19) is welded to one end of the end cover (2) away from the housing (1) and directly opposite the second ventilation slot (19), and an air inlet opening is provided at the bottom of the rain shield (17), and a filter screen (18) is fixed to the air inlet opening at the bottom of the rain shield (17).

6. The small drive motor for an electric power-assisted vehicle according to claim 5, characterized in that: A filter element (14) is fixed on the inner wall surface of the end cover (2) and at a position directly facing the second ventilation slot (19). The filter element (14) comprises an activated carbon screen (12) fixed on the inner wall surface of the end cover (2). A desiccant screen (11) is fixed on one end of the activated carbon screen (12) close to the outer shell (1), and the interior of the desiccant screen (11) is filled with desiccant particles.

7. The small drive motor for an electric power-assisted vehicle according to claim 6, characterized in that: A group of heat dissipation fins (15) are welded to one end of the end cover (2) away from the housing (1) and located above the second ventilation slot (19), and the heat dissipation fins (15) are made of aluminum alloy plates.

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