Driving motor structure for propelling electric boat

Abstract

The utility model relates to a driving motor structure for propelling an electric boat, which comprises a nose cone, a motor shell, a driving motor structure and an end cover, the driving motor structure and the end cover are arranged in the motor shell, one end of the motor shell is connected with the nose cone, and the other end of the motor shell is provided with the end cover. The driving motor structure body is composed of a motor rotating shaft externally connected with a power source, a rotor core and a stator core winding, the rotor core is arranged on the outer side of the motor rotating shaft in a sleeved mode, the stator core winding is installed on the rotor core, and the end, close to the nose cone, of the motor rotating shaft is connected with the inner side wall of the motor shell through a first locking nut and a first bearing. The other end of the motor is connected with the inner side wall of the motor shell through a second bearing and fixed through an end cover, a rotating shaft part of the motor is exposed out of the end cover, a propeller is installed at the end of the exposed part of the motor through a second locking nut, and fins are installed at the bottom of the motor shell. The permanent magnet synchronous motor is compact and reasonable in structure, convenient to install and use, small in size, high in efficiency, large in power density and good in stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive motors and relates to a drive motor structure for electric boat propulsion. Background Art

[0002] In order to advocate environmental protection and low carbon, the use of fuel boats has been successively prohibited in many waters in China.

[0003] For individual users such as fishing enthusiasts and sailing enthusiasts, with the deepening of the concept of environmental protection and low carbon and the pursuit of a better boating experience, they are gradually inclined to choose a boat electric propulsion system with zero pollution and zero emissions.

[0004] The selection of the power of the boat electric propulsion system needs to be comprehensively selected in combination with the size of the boat, load capacity, target speed, usage scenarios, etc. Therefore, a drive motor structure for electric boat propulsion is designed to overcome the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and to provide a drive motor structure for electric boat propulsion with reasonable structural rhythm, convenient installation and use, small volume, high efficiency, large power density and good stability.

[0006] The utility model is realized by the following technical solutions: A drive motor structure for electric boat propulsion includes a head cone, a motor housing, a drive motor structure installed in the motor housing, and an end cover. One end of the motor housing is connected to the head cone, and the other end is installed with an end cover. The drive motor structure body is composed of a motor shaft connected to an external power supply, a rotor core, a stator core winding, and a bearing. The outside of the motor shaft is sleeved with a rotor core, and a stator core winding is installed on the rotor core. One end of the motor shaft close to the head cone is connected to the inner side wall of the motor housing through a first locking nut and a first bearing, and the other end is connected to the inner side wall of the motor housing through a second bearing and fixed by the end cover. Part of the motor shaft is exposed outside the end cover, and a propeller is installed at the end of the exposed part through a second locking nut. A fin is installed at the bottom of the motor housing.

[0007] Preferably: A sealing pressing plate is arranged between the motor shaft and the end cover to improve the stability and overall sealing performance of the motor shaft during operation.

[0008] Preferably: A first O-ring seal is arranged between one end of the motor shaft close to the head cone and the motor housing to ensure the overall tightness.

[0009] Preferably: Oil seals are arranged on both the upper and lower sides of the motor shaft between one end of the motor shaft close to the propeller and the motor housing.

[0010] Preferably, a second O-ring seal is provided between the side of the motor housing close to the propeller and the end cover to ensure the tightness between the motor housing and the end cover.

[0011] Preferably, a permanent magnet structure is attached to the outer surface of the rotor core to reduce the overall volume and make the overall motor structure a permanent magnet synchronous motor.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The drive motor structure for electric boat propulsion designed by the present utility model can greatly improve the overall tightness through the designed sealing rings, oil seals and sealing plates, thereby improving the service life. The motor structure design adopts a permanent magnet synchronous motor, which has a small volume, high efficiency and can have a larger power density. The rotor structure design adopts a surface-mounted SPM structure for the magnetic steel. Compared with the IPM structure, the utilization rate of permanent magnet materials is high, the volume can be further reduced, and the D-axis and Q-axis inductances of the surface-mounted SPM structure for the magnetic steel are close, the control is simple, and the id = 0 control is adopted, with high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 It is a schematic diagram of the internal structure of the present utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the rotor core in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the purposes, technical solutions and advantages of the present utility model clearer for those of ordinary skill in the art, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "lateral", "vertical", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or component referred to must have a specific orientation, so it should not be construed as a limitation to the present utility model.

[0019] The present utility model will be described in detail below in conjunction with the accompanying drawings: As Figure 1-2As shown in the figure, a drive motor structure for electric boat propulsion includes a head cone 1, a motor housing 2, a drive motor structure installed inside the motor housing 2, and an end cover 3. One end of the motor housing 2 is connected to the head cone 1, and the other end is installed with the end cover 3. The drive motor structure body is composed of a motor shaft 4 powered by an external power supply, a rotor core 5, and a stator core winding 6. A rotor core 5 is sleeved outside the motor shaft 4, and a stator core winding is installed on the rotor core 5. One end of the motor shaft close to the head cone 1 is connected to the inner side wall of the motor housing through a first locking nut 7 and a first bearing 8, and the other end is connected to the inner side wall of the motor housing through a second bearing 9 and fixed by an end cover 10. A part of the motor shaft 4 is exposed outside the end cover 10, and a propeller 12 is installed at the end of the exposed part through a second locking nut 11. A fin 13 is installed at the bottom of the motor housing 2. A sealing pressure plate 14 is arranged between the motor shaft 4 and the end cover to improve the stability and overall sealing performance of the motor shaft 4 during operation.

[0020] A first O-ring seal 15 is arranged between one end of the motor shaft 4 close to the head cone 1 and the motor housing 2 to ensure the overall tightness. Oil seals 16 are arranged on both the upper and lower sides of the motor shaft 4 between one end of the motor shaft 4 close to the propeller 12 and the motor housing 2.

[0021] A second O-ring seal 17 is arranged between one side of the motor housing 2 close to the propeller 12 and the end cover 10 to ensure the tightness between the motor housing 2 and the end cover 10. As Figure 3 shown, a permanent magnet structure 18 is attached to the outer surface of the rotor core 5, which is used to reduce the overall volume and make the overall motor structure a permanent magnet synchronous motor.

[0022] The drive motor structure for electric boat propulsion designed by the utility model can greatly improve the overall tightness through the designed sealing rings, oil seals and sealing plates, thereby improving the service life.

[0023] The motor structure design of the utility model adopts a permanent magnet synchronous motor, which has a small volume, high efficiency, and can have a larger power density; the rotor structure design adopts a surface-mounted permanent magnet (SPM) structure. Compared with the interior permanent magnet (IPM) structure, the utilization rate of permanent magnet materials is high, the volume can be further reduced, and the D-axis and Q-axis inductances of the SPM structure are close, the control is simple, and the id=0 control is adopted, with high stability.

[0024] The specific embodiments described herein are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those of ordinary skill in the art without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A drive motor structure for electric boat propulsion, comprising a head cone (1), a motor housing (2), a drive motor structure installed within the motor housing (2), and an end cover (3). One end of the motor housing (2) is connected to the head cone (1), and the other end is equipped with the end cover (3). It is characterized in that: The driving motor structure body is composed of a motor shaft (4) connected to an external power supply, a rotor core (5), and a stator core winding (6). The rotor core (5) is sleeved on the outer side of the motor shaft (4), and the stator core winding (6) is installed on the rotor core (5). One end of the motor shaft (4) close to the nose cone (1) is connected to the inner side wall of the motor housing through a first locking nut (7) and a first bearing (8), and the other end is connected to the inner side wall of the motor housing through a second bearing (9) and fixed by an end cover (3). Part of the motor shaft (4) is exposed outside the end cover (3), and a propeller (12) is installed at the end of the exposed part through a second locking nut (11). Fins (13) are installed at the bottom of the motor housing (2).

2. The drive motor structure for electric boat propulsion according to claim 1, wherein: A sealing pressing plate (14) is arranged between the motor shaft (4) and the end cover to improve the stability and overall sealing performance of the motor shaft (4) during operation.

3. The drive motor structure for electric boat propulsion according to claim 2, characterized in that: A first O-ring seal (15) is arranged between one end of the motor shaft (4) close to the nose cone (1) and the motor housing (2) to ensure the overall airtightness.

4. The drive motor structure for electric boat propulsion according to claim 3, characterized in that: Oil seals (16) are arranged on both the upper and lower sides of the motor shaft (4) between one end of the motor shaft (4) close to the propeller (12) and the motor housing (2).

5. The drive motor structure for electric boat propulsion according to claim 4, characterized in that: A second O-ring seal (10) is arranged between one side of the motor housing (2) close to the propeller (12) and the end cover (3) to ensure the airtightness between the motor housing (2) and the end cover (3).

6. The drive motor structure for electric boat propulsion according to claim 1, characterized in that: A permanent magnet structure (18) is attached to the outer surface of the rotor core (5) to reduce the overall volume and make the whole motor structure a permanent magnet synchronous motor.

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