Three-phase motor with good waterproofness

Abstract

The utility model aims to provide a three-phase motor with good waterproofness, which comprises a main body and a signal assembly, the main body comprises a casing, a stator piece, a rotor piece, a front end cover, a rear end cover and a first sealing ring, the stator piece is arranged in the casing, the front end cover is arranged at one end of the casing, the first sealing ring is arranged between the front end cover and the casing, and the signal assembly is arranged in the casing. The rear end cover is bonded to the end, away from the front end cover, of the machine shell, the rotor part penetrates through the stator part, the two ends of the rotor part are rotationally connected with the front end cover and the rear end cover respectively, one end of the rotor part penetrates out of the front end cover, and the signal assembly comprises a circuit board, a wire protecting sleeve, a three-phase wire, a second sealing ring and a rear cover. The circuit board is arranged on the end face, away from the machine shell, of the rear end cover, a kidney-shaped hole is formed in the rear end cover, the wire protecting sleeve is arranged in the kidney-shaped hole, the three-phase wire penetrates through the wire protecting sleeve, the end, close to the circuit board, of the kidney-shaped hole is further provided with a glue filling body, and the rear cover is arranged at the end, away from the machine shell, of the rear end cover. The second sealing ring is arranged between the rear cover and the rear end cover.

Description

Technical Field

[0001] This utility model relates to the technical field of motors, and in particular to a three-phase motor with good waterproof performance. Background Technology

[0002] As model aircraft continue to develop, the requirements for three-phase motors are becoming increasingly stringent. For example, to adapt to high-humidity operating environments, three-phase motors need to have excellent waterproof performance. Specifically, the circuit board is used to power the stator coils, input operating signals, and provide feedback on rotor speed, so it needs to be waterproofed and sealed to prevent water from entering the circuit board mounting area and causing short circuits.

[0003] However, current waterproofing measures for three-phase motors mainly involve adding protective housings or ordinary sealing rings. This method not only requires additional components, increasing costs, but also increases the assembly difficulty of the three-phase motor. Therefore, to address the shortcomings of existing three-phase motors, this application proposes a three-phase motor with superior waterproofing. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a waterproof three-phase motor with high reliability and easy assembly.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A waterproof three-phase motor, comprising:

[0007] The main body includes a housing, a stator component, a rotor component, a front end cover, a rear end cover, and a first sealing ring. The stator component is disposed within the housing. The front end cover is disposed at one end of the housing. The first sealing ring is disposed between the front end cover and the housing. The rear end cover is adhered to the end of the housing away from the front end cover. The rotor component passes through the stator component, and both ends of the rotor component are rotatably connected to the front end cover and the rear end cover, respectively. One end of the rotor component protrudes from the front end cover.

[0008] The signal assembly includes a circuit board, a cable sheath, three-phase wires, a second sealing ring, and a rear cover. The circuit board is disposed on the end face of the rear cover away from the housing. The rear cover has an oblong hole, and the cable sheath is disposed in the oblong hole. The three-phase wires pass through the cable sheath and are electrically connected to the stator and the circuit board, respectively. The end of the oblong hole near the circuit board is also provided with potting compound. The rear cover is disposed on the end of the rear cover away from the housing, and the second sealing ring is disposed between the rear cover and the rear cover.

[0009] Optionally, a bearing is provided on the front end cover and the rear end cover respectively, and the rotor is rotatably connected to the two bearings.

[0010] Optionally, an insulating plate is provided on one end face of the front end cover near the stator component.

[0011] Optionally, both the first sealing ring and the second sealing ring are O-rings.

[0012] Optionally, one end of the rear end cover is inserted into the housing, and the rear end cover is interference-fitted with the housing.

[0013] Optionally, at least one reinforcing groove is provided on the outer wall of the end of the rear cover near the housing.

[0014] Optionally, the cable sheath is made of silicone.

[0015] Optionally, the cable sleeve is provided with an inverted conical surface.

[0016] Optionally, the cross-section of the cable sleeve is I-shaped.

[0017] Optionally, the circuit board is connected to a plurality of wires, and a sealing body is provided on the wires. The rear end cover is provided with a wire outlet groove, and the sealing body is disposed in the wire outlet groove.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] This utility model discloses a waterproof three-phase motor, comprising a main body and a signal assembly. The main body includes a housing, a stator, a rotor, a front cover, a rear cover, and a first sealing ring. The stator is disposed inside the housing. The front cover is disposed at one end of the housing. The first sealing ring is disposed between the front cover and the housing. The rear cover is bonded to the end of the housing away from the front cover. The rotor passes through the stator, and both ends of the rotor are rotatably connected to the front cover and the rear cover, respectively. One end of the rotor protrudes from the front cover. The signal assembly includes a circuit board, a wire sheath, three-phase wires, a second sealing ring, and a rear cover. The circuit board is disposed on the end face of the rear cover away from the housing. The rear cover has an oblong hole. The wire sheath is disposed in the oblong hole. The three-phase wires pass through the wire sheath and are electrically connected to the stator and the circuit board, respectively. An encapsulating material is also disposed at the end of the oblong hole near the circuit board. The rear cover is disposed on the end of the rear cover away from the housing. The second sealing ring is disposed between the rear cover and the rear cover. Thus, the modular design of each component of the waterproof three-phase motor of this application results in a compact structure that facilitates assembly. Furthermore, the structure of the first sealing ring, the second sealing ring, the wire sheath, and the potting compound ensures a good seal on the circuit board, effectively preventing external water from entering the motor and causing a short circuit on the circuit board, thus demonstrating superior waterproof performance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a waterproof three-phase motor according to one embodiment of the present invention.

[0022] Figure 2 for Figure 1 The diagram shows the exploded structure of a waterproof three-phase motor.

[0023] Figure 3 for Figure 1 A cross-sectional schematic diagram of a three-phase motor with good waterproof performance is shown.

[0024] Figure 4 for Figure 1 A partial structural diagram of a waterproof three-phase motor is shown.

[0025] Figure 5 This is a schematic diagram of the cable sheath according to one embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Waterproof three-phase motor; 100. Main body; 200. Signal components; 110. Housing; 120. Stator; 130. Front cover; 140. First sealing ring; 150. Rear cover; 160. Rotor; 210. Circuit board; 220. Cable sleeve; 230. Three-phase wire; 240. Second sealing ring; 250. Rear cover; 151. Waist-shaped hole; 170. Bearing; 180. Insulating board; 190. Insulating paper; 152. Reinforcing groove; 221. Inverted conical surface; 260. Wire; 270. Sealing body; 153. Outlet groove. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0029] like Figures 1 to 5As shown, a waterproof three-phase motor 10 includes a main body 100 and a signal assembly 200. The main body 100 includes a housing 110, a stator 120, a front cover 130, a first sealing ring 140, a rear cover 150, and a rotor 160. The stator 120 is disposed inside the housing 110. The front cover 130 is disposed at one end of the housing 110. The first sealing ring 140 is disposed between the front cover 130 and the housing 110. The rear cover 150 is bonded to the end of the housing 110 away from the front cover 130. The rotor 160 passes through the stator 120, and both ends of the rotor 160 are rotatably connected to the front cover 130 and the rear cover 150, respectively. One end of the rotor 160 extends from the front cover 130. The signal assembly 200 includes a circuit board 210, a cable sheath 220, three-phase wires 230, a second sealing ring 240, and a rear cover 250. The circuit board 210 is located on the end face of the rear cover 150 away from the housing 110. The rear cover 150 has an oblong hole 151. The cable sheath 220 is located inside the oblong hole 151. The three-phase wires 230 pass through the cable sheath 220 and are electrically connected to the stator component 120 and the circuit board 210, respectively. The end of the oblong hole 151 near the circuit board 210 is also provided with potting compound. The rear cover 250 is located on the end of the rear cover 150 away from the housing 110. The second sealing ring 240 is located between the rear cover 250 and the rear cover 150.

[0030] It should be noted that the stator component 120 is glued to the inner wall of the housing 110. The front cover 130 is installed on the front end of the housing 110, and a first sealing ring 140 is clamped between the front cover 130 and the housing 110. The first sealing ring 140 eliminates the gap between the front cover 130 and the housing 110, ensuring the airtightness of the installation of the front cover 130 and the housing 110. The rear cover 150 is glued to the end of the housing 110 away from the front cover 130. The rotor component 160 is rotatably connected to both the front cover 130 and the rear cover 150, and the rotor component 160 also extends out of the front cover 130. Furthermore, a circuit board 210 is mounted on the end face of the rear cover 150 away from the housing 110. An oblong hole 151 is provided on the rear cover 150 along the axial direction. The wire sleeve 220 is adapted to be inserted into the oblong hole 151. The three-phase wire 230 passes through the wire sleeve 220, and one end of the three-phase wire 230 is connected to the coil of the stator component 120. The other end of the three-phase wire 230 is connected to the circuit board 210. Furthermore, in order to improve the sealing performance of the oblong hole 151, glue is injected into the oblong hole 151 on the side close to the circuit board 210 and cured to form a potting compound. In this way, the oblong hole 151 is completely sealed by the potting compound, ensuring that the space where the stator component 120 is located is well sealed and isolated from the space where the circuit board 210 is located. Furthermore, the rear cover 250 is snapped onto the end of the rear cover 150 away from the housing 110, and a second sealing ring 240 is clamped between the rear cover 250 and the rear cover 150, eliminating the gap between the rear cover 250 and the rear cover 150. Thus, the modular design of the components of the waterproof three-phase motor 10 of this application results in a compact structure, facilitating assembly. Moreover, the first sealing ring 140, the second sealing ring 240, the wire sheath 220, and the potting compound ensure a good seal on the circuit board 210, effectively preventing external water from entering the motor and causing a short circuit in the circuit board 210, demonstrating superior waterproof performance.

[0031] like Figure 2 and Figure 3 As shown, in one embodiment, a bearing 170 is respectively provided on the front cover 130 and the rear cover 150, and the rotor 160 is rotatably connected to the two bearings 170.

[0032] It should be noted that the front cover 130 is fixed to the housing 110 with screws, the rear cover 150 is fixed to the housing 110 with adhesive, and the stator 120 is fixed to the inner wall of the housing 110 with adhesive. Therefore, the housing 110, stator 120, front cover 130, and rear cover 150 are fixed as a single structure. By installing a bearing 170 on the front cover 130 and the rear cover 150 respectively, the rotor 160 can rotate stably relative to the stator 120.

[0033] like Figure 2 and Figure 3 As shown, in one embodiment, an insulating plate 180 is provided on one end face of the front end cover 130 near the stator member 120.

[0034] It should be noted that the insulating plate 180 separates the housing 110 from the front cover 130. When the front cover 130 is fixed to the housing 110 with screws, the screws are blocked by the insulating plate 180, thereby preventing the metal front cover 130 and screws from coming into contact with the stator component 120 and causing a short circuit.

[0035] like Figure 2 and Figure 3 As shown, in one embodiment, an insulating paper 190 is provided on the end of the rear end cover 150 near the stator component 120, so as to avoid short circuit between the stator component 120 and the components of the rear end cover 150.

[0036] In one embodiment, both the first sealing ring 140 and the second sealing ring 240 are O-rings. Thus, the O-rings are sized to match the front cover 130 and the rear cover 250, effectively eliminating gaps between the front cover 130 and the housing 110, and between the rear cover 250 and the rear end cover 150, ensuring waterproof sealing within the motor.

[0037] In one embodiment, one end of the rear end cover 150 is inserted into the housing 110, and the rear end cover 150 and the housing 110 are interference-fitted. Specifically, the end of the rear end cover 150 is interference-fitted into the housing 110, wherein the rear end cover 150 and the housing 110 are bonded and fixed together by adhesive.

[0038] like Figure 2 and Figure 3 As shown, in one embodiment, at least one reinforcing groove 152 is provided on the outer side wall of the end of the rear cover 150 near the housing 110.

[0039] It should be noted that the reinforcing grooves 152 are distributed in a circular pattern on the rear end cover 150, and there are multiple reinforcing grooves 152. In this way, when glue is applied to the rear end cover 150, the glue will remain in the reinforcing grooves 152, thereby improving the structural strength between the rear end cover 150 and the housing 110.

[0040] In one embodiment, the cable sheath 220 is made of silicone. This allows the cable sheath 220 to fit snugly against the inner wall of the slot 151, effectively eliminating any gaps between it and the slot 151.

[0041] like Figure 5 As shown, in one embodiment, the cable sheath 220 is provided with an inverted conical surface 221. This facilitates the insertion of the cable sheath 220 into the oblong hole 151, simplifying component assembly.

[0042] In one embodiment, the cross-section of the cable sleeve 220 is I-shaped. This allows the cable sleeve 220 to be stably secured within the slotted hole 151, improving the installation stability of the cable sleeve 220.

[0043] like Figure 1 and Figure 2 As shown, in one embodiment, a plurality of wires 260 are connected to the circuit board 210, and a sealing body 270 is provided on the wires 260. A wire outlet groove 153 is provided on the rear end cover 150, and the sealing body 270 is disposed in the wire outlet groove 153.

[0044] It should be noted that the sealing body 270 is made of plastic, and the sealing body 270 and the plastic outer sheath of the wire 260 are integrally molded. In this way, the sealing body 270 is inserted into the wire outlet groove 153, allowing the wire 260 to extend from the circuit board 210 to the outside. The sealing body 270 seals the wire outlet groove 153, improving the waterproof sealing of the space where the circuit board 210 is located.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A three-phase motor with good waterproof performance, characterized in that, include: The main body includes a housing, a stator component, a rotor component, a front end cover, a rear end cover, and a first sealing ring. The stator component is disposed within the housing. The front end cover is disposed at one end of the housing. The first sealing ring is disposed between the front end cover and the housing. The rear end cover is adhered to the end of the housing away from the front end cover. The rotor component passes through the stator component, and both ends of the rotor component are rotatably connected to the front end cover and the rear end cover, respectively. One end of the rotor component protrudes from the front end cover. The signal assembly includes a circuit board, a cable sheath, three-phase wires, a second sealing ring, and a rear cover. The circuit board is disposed on the end face of the rear cover away from the housing. The rear cover has an oblong hole, and the cable sheath is disposed in the oblong hole. The three-phase wires pass through the cable sheath and are electrically connected to the stator and the circuit board, respectively. The end of the oblong hole near the circuit board is also provided with potting compound. The rear cover is disposed on the end of the rear cover away from the housing, and the second sealing ring is disposed between the rear cover and the rear cover.

2. The three-phase motor with good water resistance according to claim 1, characterized by A bearing is provided on the front end cover and the rear end cover respectively, and the rotor is rotatably connected to the two bearings.

3. The three-phase motor with good water resistance according to claim 1, characterized by An insulating plate is provided on one end face of the front end cover near the stator component.

4. The three-phase motor with good water resistance according to claim 1, characterized by Both the first sealing ring and the second sealing ring are O-rings.

5. The three-phase motor with good water resistance according to claim 1, characterized by One end of the rear end cover is inserted into the housing, and the rear end cover is interference-fitted with the housing.

6. The three-phase motor with good water resistance according to claim 5, characterized by At least one reinforcing groove is provided on the outer wall of the end of the rear cover that is close to the housing.

7. The three-phase motor with good water resistance according to claim 1, characterized by The cable sleeve is made of silicone.

8. The three-phase motor with good water resistance according to claim 7, characterized by The cable sleeve is provided with an inverted conical surface.

9. The three-phase electric motor with good water resistance according to claim 8, characterized by The cross-section of the cable sheath is I-shaped.

10. The three-phase electric motor with good water resistance according to claim 1, characterized in that, The circuit board is connected to several wires, and a sealing body is provided on the wires. The rear end cover has a wire outlet groove, and the sealing body is disposed in the wire outlet groove.

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