Highly waterproof motor used underwater
By combining a one-piece molded back cover, plastic sleeve, gold insert, and plug seal, the problems of oil leakage and difficulty in adding sealing oil to underwater motors are solved, achieving a motor structure with high waterproof performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HOBBYWING ELECTRO-MECHANICS CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-12
AI Technical Summary
Existing underwater motors are prone to oil leakage after prolonged use, and it is difficult to add sealing oil, resulting in insufficient waterproof performance.
The one-piece molded back cover design, combined with a plastic sleeve, gold insert, sealing ring and plug seal structure, ensures the sealing of the cable outlet and rotor assembly, and allows for convenient filling of sealing oil through the oil filler screw.
It effectively prevents motor oil leakage, improves the waterproof performance of underwater motors, facilitates the addition of sealing oil, and enhances the waterproof sealing of motors.
Smart Images
Figure CN224233452U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of motors, and in particular to a highly waterproof motor for underwater use. Background Technology
[0002] Hydrofoil drive motors are constantly exposed to water, sometimes even submerged. During operation, the motors need to continuously output power underwater, thus requiring extremely high waterproofing standards. The sealing solution for hydrofoil drive motors requires a comprehensive consideration of material properties, structural design, and adaptability to operating conditions. The technical challenge lies in balancing seal reliability, cost, maintenance complexity, and environmental adaptability. With the development of deep-sea exploration and marine equipment, high-reliability sealing technology will become one of the core research directions for underwater propulsion systems.
[0003] To cope with underwater immersion environments, existing motors achieve good waterproofing by filling the rotor with sealing oil. However, this method has several drawbacks: oil leakage occurs after prolonged use, and the sealing effect remains unsatisfactory even in underwater immersion environments; secondly, after the rotor is sealed with adhesive, the lack of an oil injection hole makes subsequent oil filling extremely difficult. Therefore, to address these shortcomings, this application proposes a highly waterproof motor for underwater use. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly waterproof motor for underwater use that effectively prevents oil leakage, facilitates the addition of sealing oil, and has good waterproof performance.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] A highly waterproof motor for underwater use, comprising:
[0007] The housing has an integrally formed back cover at one end, and the back cover has a cable outlet hole.
[0008] A stator assembly, comprising a stator component, a plastic sleeve, and a gold insert, wherein the stator component is disposed on the inner side wall of the housing, the plastic sleeve is adhered to the inner side wall of the cable outlet, and the gold insert passes through the plastic sleeve and is electrically connected to the stator component.
[0009] A front-end assembly, comprising a first sealing ring, a front cover, and an oil filling screw, wherein the first sealing ring is fitted onto the outer wall of the front cover, and the front cover is disposed on the end of the housing away from the rear cover, such that the inner wall of the housing clamps the first sealing ring; the front cover has an oil filling hole, and the oil filling screw is screwed into the oil filling hole; and
[0010] A rotor assembly, comprising a rotor component and a plug seal, wherein the rotor component is rotatably connected to the rear cover and the front cover respectively, and the rotor component extends through the front cover; the plug seal is disposed on the front cover and sleeved with the rotor component.
[0011] Optionally, the rotor component includes a rotating shaft and a permanent magnet. The permanent magnet is coaxially disposed on the rotating shaft. The rotating shaft is rotatably connected to the rear cover and the front cover, respectively. The rotating shaft extends out of the front cover. The plug seal is sleeved with the rotating shaft. The permanent magnet is located inside the stator component.
[0012] Optionally, the rotor assembly further includes two bearings, one of which is disposed in the rear cover and the other in the front cover, and the shaft is rotatably connected to the two bearings respectively.
[0013] Optionally, the rear cover has a bearing chamber for housing the bearing.
[0014] Optionally, a step is provided between the outlet hole and the bearing chamber.
[0015] Optionally, the portion of the cable outlet hole away from the housing has an internal thread.
[0016] Optionally, three of each of the wire outlet holes, the gold inserts, and the plastic sleeves are provided. The three plastic sleeves are respectively adhered to the inner sidewalls of the three wire outlet holes, and the three gold inserts are respectively inserted through the three plastic sleeves. All three gold inserts are electrically connected to the stator component.
[0017] Optionally, an annular groove is provided on the outer wall of the plastic sleeve.
[0018] Optionally, the front end assembly further includes a second sealing ring, which is fitted onto the outer wall of the plug seal and is in contact with the front cover.
[0019] Optionally, the front-end assembly further includes a third sealing ring disposed within the oil injection hole, such that the oil injection screw clamps the third sealing ring.
[0020] Compared with the prior art, the present invention has at least the following advantages:
[0021] This utility model discloses a highly waterproof underwater motor, comprising a housing, a stator assembly, a front-end assembly, and a rotor assembly. One end of the housing has an integrally formed rear cover with a cable outlet hole. The stator assembly includes a stator component, a plastic sleeve, and a metal insert. The stator component is disposed on the inner wall of the housing, the plastic sleeve is adhered to the inner wall of the cable outlet hole, and the metal insert passes through the plastic sleeve and is electrically connected to the stator component. The front-end assembly includes a first sealing ring, a front cover, and an oil filling screw. The first sealing ring is sleeved on the outer wall of the front cover, which is located on the end of the housing furthest from the rear cover, so that the inner wall of the housing clamps the first sealing ring. The front cover has an oil filling hole, and the oil filling screw is screwed into the oil filling hole. The rotor assembly includes a rotor component and a plug seal. The rotor component is rotatably connected to both the rear cover and the front cover, and extends through the front cover. The plug seal is disposed on the front cover and sleeved with the rotor component. Thus, by removing or tightening the oil filler screw, it is easy to inject sealing oil into the housing; furthermore, by sealing the gap between the cable outlet hole, the front cover and the rotor / housing, oil leakage of the motor is effectively prevented, resulting in excellent waterproof performance of the motor. Attached Figure Description
[0022] 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.
[0023] Figure 1 This is a schematic diagram of the structure of a highly waterproof motor for underwater use according to one embodiment of the present invention;
[0024] Figure 2 for Figure 1 The diagram shows the exploded structure of a highly waterproof motor for underwater use.
[0025] Figure 3 for Figure 1 The diagram shows a cross-sectional view of a highly waterproof motor used underwater.
[0026] Figure 4 This is a cross-sectional schematic diagram of a plastic sleeve according to one embodiment of the present invention.
[0027] Explanation of reference numerals in the attached figures:
[0028] 10. Highly waterproof motor for underwater use; 100. Housing; 200. Stator assembly; 300. Front end assembly; 400. Rotor assembly; 500. Rear cover; 510. Cable outlet; 210. Stator component; 220. Plastic sleeve; 230. Metal insert; 310. First sealing ring; 320. Front cover; 330. Oil filler screw; 321. Oil filler hole; 410. Rotor component; 420. Plug seal; 411. Shaft; 412. Permanent magnet; 430. Bearing; 520. Bearing housing; 530. Step; 511. Internal thread; 221. Annular groove; 340. Second sealing ring; 350. Third sealing ring; 360. Fourth sealing ring. Detailed Implementation
[0029] 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.
[0030] like Figures 1 to 3 As shown, a highly waterproof underwater motor 10 includes a housing 100, a stator assembly 200, a front end assembly 300, and a rotor assembly 400. One end of the housing 100 has an integrally formed rear cover 500 with a cable outlet hole 510. The stator assembly 200 includes a stator component 210, a plastic sleeve 220, and a metal insert 230. The stator component 210 is disposed on the inner wall of the housing 100. The plastic sleeve 220 is adhered to the inner wall of the cable outlet hole 510. The metal insert 230 passes through the plastic sleeve 220 and is electrically connected to the stator component 210. The front end assembly 300 includes a first sealing ring 310 and a front cover 400. 20 and oil filling screw 330, the first sealing ring 310 is sleeved on the outer side wall of the front cover 320, the front cover 320 is set on the end of the housing 100 away from the rear cover 500, so that the inner side wall of the housing 100 presses the first sealing ring 310, the front cover 320 is provided with an oil filling hole 321, the oil filling screw 330 is screwed into the oil filling hole 321, the rotor assembly 400 includes a rotor component 410 and a plug seal 420, the rotor component 410 is rotatably connected to the rear cover 500 and the front cover 320 respectively, and the rotor component 410 passes through the front cover 320, the plug seal 420 is set on the front cover 320, and the plug seal 420 is sleeved with the rotor component 410.
[0031] It should be noted that an integrally formed rear cover 500 is formed on one end of the housing 100. Compared with the existing detachable assembly structure, the structure of this application can avoid gaps between the rear cover 500 and the housing 100, thereby improving the sealing performance inside the housing 100. The stator component 210 is installed on the inner wall of the housing 100. For example, the stator component 210 includes a stator core and three stator coils wound on the stator core. Further, a wire outlet hole 510 is provided on the rear cover 500, which is used to connect the wiring of the three stator coils to the outside. Specifically, to ensure the waterproofness of the wire outlet hole 510, a plastic sleeve 220 is interference-fitted into the wire outlet hole 510. A metal plug 230 is gap-fitted through the plastic sleeve 220, so that one end of the metal plug 230 extends into the housing 100 and is electrically connected to the stator coils. To ensure the waterproof seal at the cable outlet 510, a plastic sleeve 220 is glued to the inner wall of the cable outlet 510. In one embodiment, the plastic sleeve 220 is made of silicone. When the gold insert 230 passes through the plastic sleeve 220, it expands the plastic sleeve 220, thus effectively eliminating the gap between the gold insert 230 and the plastic sleeve 220. Furthermore, an adhesive potting process is used to form an adhesive body at the end of the plastic sleeve 220 near the housing 100, thereby effectively improving the waterproof seal of the cable outlet 510. Furthermore, the front cover 320 is installed on the end of the housing 100 away from the rear cover 500 using ordinary screws. The first sealing ring 310 is located between the front cover 320 and the housing 100, and the front cover 320 and the housing 100 together clamp the first sealing ring 310, thus eliminating the assembly gap between the front cover 320 and the housing 100 and ensuring waterproof seal. The rotor component 410 passes through the stator component 210 and is rotatably connected to both the rear cover 500 and the front cover 320, with one end of the rotor component 410 protruding from the front cover 320. To eliminate the assembly gap between the rotor component 410 and the front cover 320, a plug seal 420 is coaxially mounted on the front cover 320 with the rotor component 410. This plug seal 420 seals the space between the rotor component 410 and the front cover 320. Furthermore, an oil filling hole 321 is provided on the front cover 320, and an oil filling screw 330 is screwed into the oil filling hole 321, thereby sealing or opening the oil filling hole 321. Thus, by removing or tightening the oil filling screw 330, sealing oil can be easily injected into the housing 100; furthermore, by sealing the gap between the cable outlet hole 510, the front cover 320 and the rotor 410 / housing 100, oil leakage of the motor is effectively prevented, resulting in excellent waterproof performance of the motor.
[0032] like Figures 1 to 3As shown, in one embodiment, the rotor component 410 includes a rotating shaft 411 and a permanent magnet 412. The permanent magnet 412 is coaxially disposed on the rotating shaft 411. The rotating shaft 411 is rotatably connected to the rear cover 500 and the front cover 320 respectively, and the rotating shaft 411 extends out of the front cover 320. The plug seal 420 is sleeved with the rotating shaft 411, and the permanent magnet 412 is located inside the stator component 210.
[0033] Thus, the pivot 411 extends out from the front cover 320, and the plug seal 420 abuts against the pivot 411, using the plug seal 420 to eliminate the gap between the pivot 411 and the front cover 320.
[0034] like Figure 2 and Figure 3 As shown, in one embodiment, the rotor assembly 400 further includes two bearings 430, one of which is disposed on the rear cover 500 and the other on the front cover 320. The rotating shaft 411 is rotatably connected to the two bearings 430 respectively. In this way, it is ensured that the rotor component 410 can be stably rotatably connected to the rear cover 500 and the front cover 320.
[0035] like Figure 3 As shown, in one embodiment, the rear cover 500 has a bearing chamber 520 for accommodating the bearing 430. In another embodiment, the front cover 320 has a bearing groove, and the bearing located on the front cover 320 is installed in the bearing groove. In this way, the bearing 430 located on the rear cover 500 is secured in the bearing chamber 520, and the bearing located on the front cover 320 is secured in the bearing groove, ensuring that the bearing 430 is stably installed with the rear cover 500 / front cover 320.
[0036] like Figure 3 As shown, in one embodiment, a step 530 is provided between the wire outlet 510 and the bearing chamber 520.
[0037] In this way, when applying glue to the plastic sleeve 220 of the wire outlet hole 510, the glue can be prevented from flowing back into the bearing chamber 520.
[0038] like Figure 3 As shown, in one embodiment, the portion of the cable outlet 510 away from the housing 100 has an internal thread 511. This allows for easy connection of external devices to the metal insert 230 via screwing into the internal thread, thereby achieving a highly waterproof connection with the motor.
[0039] In one embodiment, three wire outlet holes 510, three metal inserts 230, and three plastic sleeves 220 are provided. The three plastic sleeves 220 are respectively adhered to the inner sidewalls of the three wire outlet holes 510, and the three metal inserts 230 are respectively inserted through the three plastic sleeves 220. The three metal inserts 230 are all electrically connected to the stator component 210.
[0040] It should be noted that the stator component 210 is provided with three stator coils, and the three electronic coils are electrically connected to three metal plugs 230 respectively to achieve connection with the outside.
[0041] like Figure 4 As shown, in one embodiment, an annular groove 221 is provided on the outer side wall of the plastic sleeve 220.
[0042] It should be noted that, in order to improve the bonding strength between the plastic sleeve 220 and the outlet hole 510, an annular adhesive groove 221 is axially opened on the plastic sleeve 220, so that the adhesive can be retained in the annular adhesive groove 221. After curing, the waterproof sealing between the outlet hole 510 and the plastic sleeve 220 is effectively improved.
[0043] like Figure 2 and Figure 3 As shown, in one embodiment, the front end assembly 300 further includes a second sealing ring 340, which is sleeved on the outer side wall of the plug seal 420 and fits against the front cover 320.
[0044] It should be noted that the second sealing ring 340 is used to eliminate the assembly gap at the installation position of the plug seal 420 and the front cover 320, ensuring the waterproof sealing performance of the plug seal 420 and the front cover 320.
[0045] like Figure 2 and Figure 3 As shown, in one embodiment, the front-end component 300 further includes a third sealing ring 350, which is disposed in the oil injection hole 321 so that the oil injection screw 330 clamps the third sealing ring 350.
[0046] Thus, when the oil filling screw 330 is tightened into the oil filling hole 321, the third sealing ring 350 is used to eliminate the gap between the oil filling screw 330 and the oil filling hole 321, ensuring that the oil filling screw 330 reliably seals the oil filling hole 321 and improving the overall waterproof performance of the motor.
[0047] like Figure 2 and Figure 3 As shown, in one embodiment, a fourth sealing ring 360 is also provided on the end face of the front cover 320 away from the housing 100. Thus, when the motor is installed and used, the fourth sealing ring 360 can waterproofly seal the installation interface, preventing water from entering the waterproof seal 420, forming the first waterproof sealing structure, and improving the waterproof performance of the high waterproof motor 10 for underwater use in this application.
[0048] In one embodiment, the first sealing ring 310, the second sealing ring 340, the third sealing ring 350, and the fourth sealing ring 360 are all O-rings.
[0049] 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 highly waterproof motor for underwater use, characterized in that, include: The housing has an integrally formed back cover at one end, and the back cover has a cable outlet hole. A stator assembly, comprising a stator component, a plastic sleeve, and a gold insert, wherein the stator component is disposed on the inner side wall of the housing, the plastic sleeve is adhered to the inner side wall of the cable outlet, and the gold insert passes through the plastic sleeve and is electrically connected to the stator component. The front-end assembly includes a first sealing ring, a front cover, and an oil filling screw. The first sealing ring is sleeved on the outer side wall of the front cover. The front cover is located on the end of the housing away from the rear cover, so that the inner side wall of the housing presses the first sealing ring. An oil filling hole is provided on the front cover, and the oil filling screw is screwed into the oil filling hole. and A rotor assembly, comprising a rotor component and a plug seal, wherein the rotor component is rotatably connected to the rear cover and the front cover respectively, and the rotor component extends through the front cover; the plug seal is disposed on the front cover and sleeved with the rotor component.
2. The highly waterproof motor for underwater use according to claim 1, characterized in that, The rotor component includes a rotating shaft and a permanent magnet. The permanent magnet is coaxially disposed on the rotating shaft. The rotating shaft is rotatably connected to the rear cover and the front cover, and the rotating shaft extends out of the front cover. The plug seal is sleeved with the rotating shaft. The permanent magnet is located inside the stator component.
3. The highly waterproof motor for underwater use according to claim 2, characterized in that, The rotor assembly also includes two bearings, one of which is located on the rear cover and the other on the front cover, and the rotating shaft is rotatably connected to the two bearings respectively.
4. The highly waterproof motor for underwater use according to claim 3, characterized in that, The rear cover has a bearing chamber for housing the bearing.
5. The highly waterproof motor for underwater use according to claim 4, characterized in that, A step is provided between the outlet hole and the bearing chamber.
6. The highly waterproof motor for underwater use according to claim 1, characterized in that, The portion of the cable outlet hole furthest from the housing has an internal thread.
7. The highly waterproof motor for underwater use according to any one of claims 1 to 6, characterized in that, There are three of each of the following: the wire outlet hole, the gold insert, and the plastic sleeve. The three plastic sleeves are respectively adhered to the inner sidewalls of the three wire outlet holes. The three gold inserts are respectively inserted through the three plastic sleeves, and the three gold inserts are electrically connected to the stator component.
8. The highly waterproof motor for underwater use according to claim 1, characterized in that, An annular groove is provided on the outer wall of the plastic sleeve.
9. The highly waterproof motor for underwater use according to claim 1, characterized in that, The front-end assembly also includes a second sealing ring, which is fitted onto the outer wall of the plug seal and is in contact with the front cover.
10. The highly waterproof motor for underwater use according to claim 1, characterized in that, The front-end component also includes a third sealing ring, which is disposed in the oil injection hole so that the oil injection screw clamps the third sealing ring.