An outer rotor electric motor

Abstract

The utility model provides a kind of outer rotor motor, comprising: driver, step part and heat dissipation groove.Drive includes driver shell, and there is accommodating space inside driver shell, for accommodating electrical element;Step part is set along the circumference of driver shell inner wall, and step part is used to fix electrical element;Heat dissipation groove is set along the circumference of driver shell outer wall, and heat dissipation groove is set corresponding with step part, heat dissipation groove extends to step part, and the depth of heat dissipation groove corresponds with the thickness of step part.The utility model solves the problem that the internal element of motor in the prior art is not good at heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of rotor motor technology, and more specifically, to an external rotor motor. Background Technology

[0002] External rotor motors, with their unique structure of external rotor and internal stator, are widely used in low-speed, high-torque scenarios. Their low-speed characteristics are conducive to direct drive, but heat dissipation and control are more difficult.

[0003] Existing technologies often use air duct cooling or liquid cooling to cool the rotor. However, due to the rotation of the rotor, traditional air-cooling and liquid-cooling systems require special design when applied, which increases the complexity and cost of the heat dissipation system and makes heat dissipation inconvenient. Utility Model Content

[0004] The problem solved by this invention is the inconvenience of heat dissipation in external rotor motors.

[0005] To address the aforementioned problems, this utility model provides an external rotor motor, comprising: a driver, a stepped portion, and a heat dissipation groove. The driver includes a driver housing with an internal space for accommodating electrical components; the stepped portion is circumferentially arranged along the inner wall of the driver housing and is used to fix the electrical components; the heat dissipation groove is circumferentially arranged along the outer wall of the driver housing, corresponding to the stepped portion, extending towards the stepped portion, and the depth of the heat dissipation groove corresponding to the thickness of the stepped portion.

[0006] Compared to existing technologies, the technical advantages achieved by this solution are as follows: the drive housing protects the electrical components, and the stepped section provides a stable mounting base for the components, ensuring their fixed position during motor operation and preventing displacement due to vibration or other factors. In existing technologies, the increased thickness of the drive housing at the stepped section makes heat dissipation of the electrical components difficult. By setting the depth of the heat dissipation grooves to correspond to the thickness of the stepped section, this design allows the heat generated by the electrical components at the stepped section to be quickly dissipated to the outside, effectively improving the heat dissipation efficiency of the electrical components, reducing the risk of damage due to overheating, and ensuring the stable operation of the external rotor motor.

[0007] Furthermore, the external rotor motor also includes a fixing member. The fixing member includes a connecting arm and a fixing arm, one end of the connecting arm is connected to the stepped portion, and the other end of the connecting arm is connected to the fixing arm; the fixing member is connected to the stepped portion, and the fixing member and the stepped portion clamp the electrical component.

[0008] Compared to existing technologies, the technical effects achieved by this solution are as follows: the fasteners further enhance the fixing effect on electrical components. Compared to fixing only with the step section, it can prevent electrical components from loosening, shifting, or even falling off under the complex forces generated by the high-speed operation of the motor, thus improving the reliability and stability of the electrical component installation. At the same time, the clamping method of the fasteners and the step section can provide a certain degree of buffer protection for the electrical components, reducing the direct impact of external forces such as vibration during motor operation on the electrical components, and extending the service life of the electrical components.

[0009] Furthermore, the connecting arm is provided with a first connecting hole; the stepped portion is provided with a second connecting hole; the external rotor motor also includes a connecting member, which mates with the first connecting hole and the second connecting hole, and the connecting member abuts against the connecting arm.

[0010] Compared with the existing technology, the technical effect achieved by this technical solution is to realize the connection between the fastener and the step, so that the fastener can fix the electrical components on the step.

[0011] Furthermore, the fixed arm and the connecting arm are bent relative to each other to form an elastically deformable structure. The fixed arm can rotate relative to the connecting arm, and the fixed arm and the step portion clamp electrical components.

[0012] Compared to existing technologies, the technical advantages achieved by this solution are as follows: the fixed arm and the connecting arm bend relative to each other to form an elastically deformable structure. When clamping electrical components, this structure can adaptively adjust according to the actual shape and size of the electrical components, improving the adaptability to electrical components of different specifications. Simultaneously, the elastically deformable structure can provide a buffer for the electrical components when the motor vibrates, effectively absorbing vibration energy and further reducing the impact of vibration on the electrical components.

[0013] Furthermore, the connecting arm and the fixed arm are integrally formed.

[0014] Compared with existing technologies, the technical effects achieved by this technical solution are: avoiding insufficient strength and loosening caused by poor welding or assembly, improving the overall strength and rigidity of the fasteners, and simplifying the manufacturing process and assembly flow, thereby effectively reducing production costs.

[0015] Furthermore, the external rotor motor also includes a stator core and a spindle seat, which are nested together; the driver is located on the side of the spindle seat away from the stator core.

[0016] Compared with the existing technology, the technical effect achieved by this technical solution is as follows: the spindle seat supports the stator core and the driver, the stator core is used to generate an excitation magnetic field, which exerts a force on the current-carrying conductors in it, and the driver is used to control the running speed of the external rotor motor.

[0017] Furthermore, the spindle housing includes a spindle body and a seat body, which are integrally formed; the seat body has a mounting groove on the side away from the spindle body; the drive housing and the mounting groove are fitted together.

[0018] Compared to existing technologies, the technical advantages achieved by this solution are as follows: the spindle housing and the base are integrally molded, avoiding problems such as loose connections and reduced fitting accuracy that may occur with split structures. This significantly improves the overall strength and rigidity of the spindle housing, ensuring structural stability during motor operation. The mounting slot allows the drive housing to precisely fit with the base, preventing displacement of the drive housing during motor operation.

[0019] Furthermore, an outer rotor housing is provided at the end of the shaft away from the drive housing; the outer rotor housing rotates relative to the main shaft seat with the shaft axis as the pivot.

[0020] Compared with existing technologies, the technical effect achieved by this technical solution is as follows: the driver energizes the external rotor housing, so that the rotor housing is subjected to the force of the excitation magnetic field of the stator core, the rotor housing rotates, and thus outputs torque.

[0021] Furthermore, a limiting groove is provided on the side of the base body near the shaft; the end of the outer rotor housing near the base body is engaged with the limiting groove.

[0022] Compared with the existing technology, the technical effect achieved by this technical solution is that the limiting groove further limits the outer rotor housing, so that the rotation axis of the outer rotor housing always remains consistent with the shaft axis during the rotation process, so that the rotor housing can work stably.

[0023] Furthermore, the external rotor motor also includes a rotor flange, which is sleeved with the external rotor housing. The rotor flange is used to fix the external rotor motor to an external device.

[0024] Compared with existing technologies, the technical effect achieved by this technical solution is that the rotor flange can be installed on external equipment by screws or other fixing methods, so that the external rotor motor can be stably fixed on the external equipment. Attached Figure Description

[0025] Figure 1 An overall drawing of the external rotor motor provided by this utility model; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 Exploded view of the external rotor motor provided by this utility model; Figure 4 for Figure 3 Enlarged view of part B in the middle; Figure 5 A structural diagram of the main spindle seat; Figure 6This is an overall structural diagram of the driver housing; Figure 7 for Figure 6 A cross-sectional view of the drive housing along direction A; Figure 8 for Figure 7 A magnified view of part C in the middle.

[0026] Explanation of reference numerals in the attached figures: 100-Driver housing; 101-Electrical components; 110-Stepped section; 120-Heat sink; 130-Fixed component; 131-Connecting arm; 132-Fixed arm; 133-Connecting component; 140-Stator core; 141-Outer rotor housing; 150-Spindle seat; 151-Shaft body; 152-Seat body; 153-Mounting slot; 154-Limiting slot; 160-Rotor flange. Detailed Implementation

[0027] The purpose of this invention is to provide an external rotor motor that facilitates heat dissipation of electrical components.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] See Figures 1 to 5 This utility model provides an external rotor motor, including: a driver, a stepped portion 110, and a heat dissipation groove 120. The driver includes a driver housing 100, and the driver housing 100 has an internal accommodating space for accommodating electrical components 101; the stepped portion 110 is arranged circumferentially along the inner wall of the driver housing 100, and the stepped portion 110 is used to fix the electrical components 101; the heat dissipation groove 120 is arranged circumferentially along the outer wall of the driver housing 100, and the heat dissipation groove 120 is correspondingly arranged with the stepped portion 110, the heat dissipation groove 120 extends into the stepped portion 110, and the depth of the heat dissipation groove 120 corresponds to the thickness of the stepped portion 110.

[0030] like Figure 6 and Figure 7 As shown, specifically, the heat dissipation slots 120 can be arranged radially along the driver housing 100 or parallel to each other. The thickness of the step portion 110 refers to the distance the step portion 110 extends from the driver housing 100 into the receiving space. If the heat dissipation slots 120 are arranged radially along the driver housing 100, then the depth of the heat dissipation slots 120 is the thickness of the step portion 110 minus the material thickness of the driver housing 100. For example, if the thickness of the step portion 110 is 15mm and the thickness of the driver housing 100 is 4mm, then the depth of the heat dissipation slots 120 is 11mm. See Figure 5 On the opposite right side of the driver housing 100, the heat dissipation slots 120 are arranged in parallel to each other, and the contour of the deepest part of the heat dissipation slots 120 changes with the direction of the step portion 110.

[0031] The drive housing protects the electrical component 101, and the stepped portion 110 provides a stable mounting base for the electrical component 101, ensuring its fixed position during motor operation and preventing displacement due to vibration or other factors. In the prior art, the thickness of the drive housing at the stepped portion 110 is increased, making heat dissipation of the electrical component 101 difficult. By setting the depth of the heat dissipation groove 120 to correspond to the thickness of the stepped portion 110, compared to the prior art, this design allows the heat generated by the electrical component 101 at the stepped portion 110 to be quickly dissipated to the outside through the heat dissipation groove 120, effectively improving the heat dissipation efficiency of the electrical component 101, reducing the risk of damage to the electrical component 101 due to overheating, and ensuring the stable operation of the external rotor motor.

[0032] Reference Figure 3 and Figure 4 The external rotor motor also includes a fixing member 130. The fixing member 130 includes a connecting arm 131 and a fixing arm 132. One end of the connecting arm 131 is connected to the step portion 110, and the other end of the connecting arm 131 is connected to the fixing arm 132. The fixing member 130 is connected to the step portion 110, and the fixing member 130 and the step portion 110 clamp the electrical component 101.

[0033] The fastener 130 further enhances the securing effect on the electrical component 101. Compared to fixing it solely with the step portion 110, it prevents the electrical component 101 from loosening, shifting, or even falling off under the complex forces generated by the high-speed operation of the motor, thus improving the reliability and stability of the electrical component 101 installation. Simultaneously, the clamping method between the fastener 130 and the step portion 110 provides a certain degree of buffering protection for the electrical component 101, reducing the direct impact of external forces such as vibration during motor operation on the electrical component 101 and extending its service life.

[0034] The connecting arm 131 is provided with a first connecting hole; the step portion 110 is provided with a second connecting hole; the external rotor motor also includes a connecting member 133, which cooperates with the first connecting hole and the second connecting hole, and the connecting member 133 abuts against the connecting arm 131.

[0035] Specifically, connector 133 is a bolt. The first connecting hole is a threaded hole, and the second connecting hole is a through hole.

[0036] The fastener 130 is connected to the step portion 110 so that the fastener 130 can fix the electrical component 101 to the step portion 110.

[0037] The fixed arm 132 and the connecting arm 131 are bent relative to each other to form an elastically deformable structure. The fixed arm 132 is rotatable relative to the connecting arm 131. The fixed arm 132 and the step portion 110 clamp the electrical component 101.

[0038] The elastically deformable structure allows the fixed arm 132 to rotate at a certain angle relative to the connecting arm 131, so that the electrical component 101 has space to be placed between the fixed arm 132 and the step portion 110. When the external force disappears, the elastic structure automatically resets, so that the fixed arm 132 can press against the electrical component 101.

[0039] One end of the fixed arm 132 is connected to the connecting arm 131, and the other end is provided with a curved structure. The curved surface of the curved structure contacts the electrical component 101, reducing the contact area and further protecting the electrical component 101 from wear.

[0040] The fixed arm 132 and the connecting arm 131 are bent relative to each other to form an elastically deformable structure. When clamping the electrical component 101, the structure can adaptively adjust according to the actual shape and size of the electrical component 101, improving the adaptability to electrical components 101 of different specifications. At the same time, the elastically deformable structure can provide a buffer for the electrical component 101 when the motor vibrates, effectively absorbing vibration energy and further reducing the impact of vibration on the electrical component 101.

[0041] The connecting arm 131 and the fixed arm 132 are integrally formed.

[0042] To avoid insufficient strength and loosening caused by poor welding or assembly, the overall strength and rigidity of fastener 130 are improved, while the manufacturing process and assembly process are simplified, which can effectively reduce production costs.

[0043] The external rotor motor also includes a stator core 140 and a spindle seat 150, which are nested together; the driver is located on the side of the spindle seat 150 away from the stator core 140.

[0044] The spindle housing 150 supports the stator core 140 and the driver. The stator core 140 is used to generate an excitation magnetic field, which exerts a force on the current-carrying conductors within it. The driver is used to control the operating speed of the external rotor motor.

[0045] Reference Figure 5 The spindle housing 150 includes a spindle body 151 and a seat body 152, which are integrally formed. The seat body 152 is provided with a mounting groove 153 on the side away from the spindle body 151. The driver housing 100 and the mounting groove 153 are fitted together.

[0046] The spindle housing 150 has its shaft 151 and seat 152 integrally formed, avoiding problems such as loose connections and reduced fitting accuracy that may occur with split structures. This significantly improves the overall strength and rigidity of the spindle housing 150, ensuring the structural stability of the spindle housing 150 during motor operation. The mounting groove 153 allows the drive housing to fit precisely with the seat 152, preventing displacement of the drive housing 100 during motor operation.

[0047] The end of the shaft 151 away from the drive housing 100 is provided with an outer rotor housing 141; the outer rotor housing 141 rotates relative to the main shaft seat 150 with the axis of the shaft 151 as the axis of rotation.

[0048] The outer rotor housing 141 is sleeved with the shaft 151.

[0049] The driver energizes the external rotor housing 141, causing the rotor housing to be subjected to the force of the excitation magnetic field of the stator core 140, thus rotating the rotor housing and outputting torque.

[0050] The base 152 is provided with a limiting groove 154 on the side near the shaft 151; the outer rotor housing 141 is engaged with the limiting groove 154 at the end near the base 152.

[0051] Specifically, in this embodiment, the limiting groove 154 is an annular groove.

[0052] The limiting groove 154 further limits the outer rotor housing 141, so that the rotation axis of the outer rotor housing 141 always remains consistent with the axis of the shaft 151 during rotation, so that the rotor housing can work stably.

[0053] The external rotor motor also includes a rotor flange 160, which is sleeved with the external rotor housing 141. The rotor flange 160 is used to fix the external rotor motor to an external device.

[0054] Specifically, the rotor flange 160 is provided with through holes, and corresponding threaded holes are provided on the external equipment. The rotor flange 160 and the external equipment can be connected and fixed by screws.

[0055] The rotor flange 160 can be mounted on external equipment by screws or other fixing methods, so that the external rotor motor can be stably fixed on the external equipment.

[0056] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An external rotor motor, characterized in that, include: A driver, the driver including a driver housing having an internal space for accommodating electrical components; A stepped portion is provided circumferentially along the inner wall of the driver housing, and the stepped portion is used to fix the electrical component; A heat dissipation groove is provided circumferentially along the outer wall of the driver housing. The heat dissipation groove is provided corresponding to the stepped portion and extends into the stepped portion. The depth of the heat dissipation groove corresponds to the thickness of the stepped portion.

2. The external rotor motor according to claim 1, characterized in that, The external rotor motor also includes a fixing component, which includes a connecting arm and a fixing arm. One end of the connecting arm is connected to the stepped portion, and the other end of the connecting arm is connected to the fixing arm. The fastener is connected to the step portion, and the fastener and the step portion clamp the electrical component.

3. The external rotor motor according to claim 2, characterized in that, The connecting arm is provided with a first connecting hole; The stepped portion is provided with a second connecting hole; The external rotor motor also includes a connector, which mates with the first connecting hole and the second connecting hole, and the connector abuts against the connecting arm.

4. The external rotor motor according to claim 3, characterized in that, The fixed arm and the connecting arm are bent relative to each other to form an elastically deformable structure. The fixed arm is rotatable relative to the connecting arm, and the fixed arm and the stepped portion clamp the electrical component.

5. The external rotor motor according to claim 4, characterized in that, The connecting arm and the fixed arm are integrally formed.

6. The external rotor motor according to any one of claims 1 to 5, characterized in that, The external rotor motor also includes a stator core and a main shaft seat, wherein the stator core and the main shaft seat are nested together. The driver is located on the side of the spindle seat away from the stator core.

7. The external rotor motor according to claim 6, characterized in that, The spindle seat includes a shaft and a seat body, and the shaft and the seat body are integrally formed. The side of the base away from the shaft is provided with a mounting groove; The driver housing and the mounting slot are fitted together.

8. The external rotor motor according to claim 7, characterized in that, An outer rotor housing is provided at the end of the shaft away from the driver housing; The outer rotor housing rotates relative to the main shaft seat with the shaft axis as the pivot.

9. The external rotor motor according to claim 8, characterized in that, The seat body is provided with a limiting groove on the side near the shaft body; The end of the outer rotor housing near the base engages with the limiting groove.

10. The external rotor motor according to claim 9, characterized in that, It also includes a rotor flange, which is sleeved with the outer rotor housing, and the rotor flange is used to fix the outer rotor motor to an external device.

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