Oil injection sealing type brushless motor
By adopting oil-injected sealing structure and sealing components in brushless motors, the problems of degradation of sealing performance at high speeds and difficulty in waterproofing through outlets are solved, and higher sealing waterproofing performance and stable operation are achieved.
Patent Information
- Application Number
- CN202421843824.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Existing brushless motors have large heat generated by sealing frames and shafts at high speeds, resulting in poor waterproofing performance. It is difficult to achieve waterproofing for small motors, which affects the motor's life and stable operation.
The oil-injected sealing structure is adopted, and the oil-injected cavity and glue filling groove are formed through the design of the front-end and rear-end components. The sealing column and sealing ring are used to ensure the air-tightness of the rotor seat exit shaft and conductor exit wire.
It effectively improves the sealing and waterproof performance of brushless motors, ensures that the motor continues to operate stably and reliably in an underwater environment, and reduces sealing costs.
Smart Images
Figure CN222915778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of brushless motors, in particular to an oil-injected sealed brushless motor. Background Technique
[0002] With the development of the global economy and the improvement of people's living standards, the market scale of entertainment boat models continues to grow. As one of the power sources of the boat model propulsion system, the waterproof performance of the brushless motor is the key to measuring the quality of the boat model. Consumers are more inclined to choose motors with good waterproof performance to ensure the long-term stable operation of the boat model. Among them, the waterproofing of the motor shaft and wire outlet is particularly important. Especially for small-sized motors, due to the low cost requirements, the sealing difficulty is greater.
[0003] The existing brushless motors on the market mainly use a sealing skeleton to seal the shaft. However, due to the high rotational speed of the motor, the heat generated by the skeleton and the shaft is large, and its waterproof performance will deteriorate, thus shortening the service life of the brushless motor. And for the waterproofing of the rear-end wire outlet, due to the limited space of the motor, it is not suitable to use a transfer sealing joint, which also becomes a major problem. In view of this, how to achieve low-cost sealing, long-term stable operation and maintenance is a problem that needs to be solved by those skilled in the art. Content of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an oil-injected sealed brushless motor with a simple sealing structure, which can effectively reduce the sealing cost and improve the operation stability.
[0005] The purpose of the utility model is achieved by the following technical solutions:
[0006] An oil-injected sealed brushless motor, including a stator base and a rotor base passing through the stator base, the stator base is provided with a plurality of wires, and further includes:
[0007] A front-end assembly, the front-end assembly includes a front-end cover, a front-end bearing and a sealing column, the front-end bearing is arranged on the front-end cover, and one side of the front-end cover close to the front-end bearing is arranged on the end of the stator base away from the wires, so that the rotor base sequentially passes through the front-end bearing and the front-end cover, so that an oil injection cavity for injecting grease is formed among the front-end cover, the front-end bearing and the rotor base, an oil injection hole communicated with the oil injection cavity is opened on the front-end cover, and the sealing column is screwed on the inner side wall of the oil injection hole; and
[0008] A rear-end component, the rear-end component includes a rear-end cover, a rear-end bearing and an end plate. The rear-end bearing is arranged on the rear-end cover. The rear-end cover is arranged on one end of the stator seat close to the wire, so that the rotor seat passes through the rear-end bearing adaptively. A potting groove for potting is opened on the side of the rear-end cover away from the stator seat. The end plate covers the opening of the potting groove, so that each wire passes through the potting groove and the end plate in sequence.
[0009] Optionally, the front-end component further includes a first sealing ring. The first sealing ring is sleeved on the front-end cover, and the first sealing ring abuts against the inner side wall of the stator seat.
[0010] Optionally, a first sealing groove is opened on the front-end cover, and the first sealing ring is sleeved in the first sealing groove.
[0011] Optionally, two oil injection holes are opened, and the two oil injection holes are axially symmetrically distributed with respect to the rotor seat.
[0012] Optionally, the rear-end component further includes a second sealing ring. The second sealing ring is sleeved on the rear-end cover, and the second sealing ring abuts against the inner side wall of the stator seat.
[0013] Optionally, a second sealing groove is opened on the rear-end cover, and the second sealing ring is sleeved in the second sealing groove.
[0014] Optionally, a first bearing groove, an oil injection groove and a through hole that are connected to each other are sequentially opened on the front-end cover along the axial direction. The oil injection hole is communicated with the oil injection groove. The front-end bearing is accommodated in the first bearing groove. The rotor seat passes through the through hole, so that the inner side wall of the oil injection groove, the rotor seat and the front-end bearing jointly enclose the oil injection cavity.
[0015] Optionally, a blind groove and a second bearing groove that are connected to each other are opened on one side surface of the rear-end cover close to the rotor seat. The rear-end bearing is accommodated in the second bearing groove, so that the end portion of the rotor seat is located in the blind groove.
[0016] Optionally, a shielding groove communicated with the potting groove is further opened on one side surface of the rear-end cover away from the rotor seat. The end plate is accommodated in the shielding groove, so that the end plate closes the potting groove.
[0017] Optionally, a plurality of wire holes are opened on the inner bottom wall of the potting groove, and each wire passes through each wire hole in one-to-one correspondence.
[0018] Compared with the prior art, the present utility model has at least the following advantages:
[0019] The oil-injecting and sealed brushless motor of the present utility model comprises a stator base and a rotor base penetrating through the stator base. The stator base is provided with a plurality of wires. It further comprises a front-end assembly and a rear-end assembly. The front-end assembly includes a front-end cover, a front-end bearing and a sealing column. The front-end bearing is arranged on the front-end cover. One side of the front-end cover close to the front-end bearing is arranged on the end of the stator base far from the wires, so that the rotor base sequentially and adaptively passes through the front-end bearing and the front-end cover, and an oil-injecting cavity for injecting grease is formed among the front-end cover, the front-end bearing and the rotor base. An oil-injecting hole communicating with the oil-injecting cavity is opened on the front-end cover, and the sealing column is screwed on the inner side wall of the oil-injecting hole. The rear-end assembly includes a rear-end cover, a rear-end bearing and an end plate. The rear-end bearing is arranged on the rear-end cover. The rear-end cover is arranged on the end of the stator base close to the wires, so that the rotor base adaptively passes through the rear-end bearing. A potting groove for potting glue is opened on one side of the rear-end cover far from the stator base, and the end plate covers the opening of the potting groove, so that each wire sequentially passes through the potting groove and the end plate. Thus, through the front-end assembly and the rear-end assembly, the airtightness of the shaft outlet position of the rotor base and the wire outlet position is effectively ensured. The structure is simple, and the sealing and waterproof performance is effectively improved, so that the motor can stably and reliably continuously operate in an underwater environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0021] Figure 1 FIG. is a schematic structural diagram of an oil-injecting and sealed brushless motor according to an embodiment of the present utility model;
[0022] Figure 2 is Figure 1 an exploded structural diagram of the oil-injecting and sealed brushless motor shown;
[0023] Figure 3 is Figure 1 a schematic structural diagram of the oil-injecting and sealed brushless motor from another angle shown;
[0024] Figure 4 is Figure 1 a schematic cross-sectional structural diagram of the oil-injecting and sealed brushless motor shown;
[0025] Figure 5 is Figure 1 a schematic partial cross-sectional structural diagram of the oil-injecting and sealed brushless motor shown;
[0026] Figure 6 FIG. is a schematic cross-sectional structural diagram of a front-end cover according to an embodiment of the present utility model;
[0027] Figure 7 Schematic structural diagram of the rear end cover according to an embodiment of the present utility model;
[0028] Figure 8 is Figure 7 Schematic cross-sectional structure diagram of the rear end cover shown.
[0029] Explanation of reference numerals:
[0030] 10, oil-injected sealed brushless motor; 100, stator base; 200, rotor base; 300, wire; 400, front end assembly; 500, rear end assembly; 410, front end cover; 420, front end bearing; 430, sealing column; 411, oil injection hole; 510, rear end cover; 520, rear end bearing; 530, end plate; 511, potting groove; 440, first sealing ring; 412, first sealing groove; 540, second sealing ring; 512, second sealing groove; 413, first bearing groove; 414, oil injection groove; 415, through hole; 513, blind groove; 514, second bearing groove; 515, shielding groove; 516, wire hole. Specific embodiments
[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the embodiments of the present utility model, and should not be construed as limiting the present utility model.
[0032] In the description of the embodiments of the present utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, "a plurality" means two or more unless otherwise specifically defined.
[0034] In the embodiments of the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0035] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings.
[0036] As Figures 1 to 7 shown, an oil-injected sealed brushless motor 10 includes a stator base 100 and a rotor base 200 passing through the stator base 100. The stator base 100 is provided with a plurality of wires 300. It further includes a front-end assembly 400 and a rear-end assembly 500. The front-end assembly 400 includes a front-end cover 410, a front-end bearing 420 and a sealing column 430. The front-end bearing 420 is arranged on the front-end cover 410. One side of the front-end cover 410 close to the front-end bearing 420 is arranged on the end of the stator base 100 away from the wires 300, so that the rotor base 200 sequentially passes through the front-end bearing 420 and the front-end cover 410, and an oil injection cavity for injecting grease is formed among the front-end cover 410, the front-end bearing 420 and the rotor base 200. An oil injection hole 411 communicating with the oil injection cavity is opened on the front-end cover 410. The sealing column 430 is screwed on the inner side wall of the oil injection hole 411. The rear-end assembly 500 includes a rear-end cover 510, a rear-end bearing 520 and an end plate 530. The rear-end bearing 520 is arranged on the rear-end cover 510. The rear-end cover 510 is arranged on the end of the stator base 100 close to the wires 300, so that the rotor base 200 passes through the rear-end bearing 520 adaptively. A potting groove 511 for potting is opened on the side of the rear-end cover 510 away from the stator base 100. The end plate 530 covers the opening of the potting groove 511, so that each wire 300 sequentially passes through the potting groove 511 and the end plate 530.
[0037] It should be noted that the rotor seat 200 passes through the stator seat 100. The stator seat 100 is provided with winding coils, and the leads of the winding coils form wires 300. The rotor seat 200 has permanent magnets. In this way, by energizing the wires 300 to form a rotating magnetic field, the rotor seat 200 can be driven to rotate relative to the stator seat 100. Further, the front-end assembly 400 is used to connect the front end of the rotor seat 200, which is also the output shaft end of the rotor seat 200. The rear-end assembly 500 is used to connect the rear end of the rotor seat 200, which is also the end (wire outlet end) where the wires 300 are led out to the outside. Among them, the front-end assembly 400 achieves sealing in the following way. Specifically, the front bearing 420 is fixedly installed on one side of the front cover 410, and then the side of the front cover 410 close to the front bearing 420 is locked and fixed to one end of the stator seat 100 by screws, so that the rotor seat 200 fits through the front bearing 420 and the front cover 410. In this way, the front cover 410, the front bearing 420 and the rotor seat 200 jointly enclose a cavity, and this cavity is the oil injection cavity for injecting grease. An oil injection hole 411 communicating with the oil injection cavity is opened on the front cover 410. In this way, after injecting grease into the oil injection cavity through the oil injection hole 411, the sealing column 430 is screwed and fixed to the oil injection hole 411, so that the oil injection cavity is in a sealed state. In this way, the part of the rotor seat 200 passing through the oil injection cavity is wrapped by grease to form a sealed waterproof area, which can effectively increase the gap between the rotor seat 200 and the front cover 410. Further, the rear-end assembly 500 achieves sealing in the following way. Specifically, the rear bearing 520 is fixed on one side of the rear cover 510, and then the side of the rear cover 510 close to the rear bearing 520 is fixed to one end of the stator seat 100 close to the wires 300 by screws, so that the end of the rotor seat 200 away from the front cover 410 passes through the rear bearing 520. Further, a potting groove 511 is opened on the side of the rear cover 510 away from the rear bearing 520, and then the end plate 530 is fixed to the potting groove 511 by screws, so that the end plate 530 covers the potting groove 511. Further, after each wire 300 passes through the rear cover 510 and enters the potting groove 511, it then passes through the end plate 530 and extends to the outside. In this way, by potting glue or filling silicone rubber in the potting groove 511, the gap formed between the wires 300 and the components can be effectively eliminated. In this way, through the front-end assembly 400 and the rear-end assembly 500, the airtightness of the output shaft position of the rotor seat 200 and the wire outlet position of the wires 300 is effectively ensured. The structure is simple, and the sealing and waterproof performance is effectively improved, so that the motor can stably and reliably continuously operate in the underwater environment.
[0038] As Figure 4 shown, in one embodiment, the front-end assembly 400 further includes a first sealing ring 440. The first sealing ring 440 is sleeved on the front cover 410, and the first sealing ring 440 abuts against the inner side wall of the stator seat 100.
[0039] It should be noted that the first sealing ring 440 has an O-ring structure, so that the sealing performance between the front end cover 410 and the stator base 100 can be ensured.
[0040] As Figure 4 and Figure 6 shown, in one embodiment, a first sealing groove 412 is formed on the front end cover 410, and the first sealing ring 440 is sleeved in the first sealing groove 412.
[0041] In this way, the first sealing ring 440 is stably held in the first sealing groove 412, preventing the first sealing ring 440 from slipping out.
[0042] In one embodiment, two oil injection holes 411 are provided, and the two oil injection holes 411 are axially symmetrically distributed with respect to the rotor base 200. In this way, by providing two oil injection holes 411, the grease can be well filled into the oil injection cavity to ensure the sealing performance of the output shaft of the rotor base 200.
[0043] As Figure 4 shown, in one embodiment, the rear end assembly 500 further includes a second sealing ring 540. The second sealing ring 540 is sleeved on the rear end cover 510, and the second sealing ring 540 abuts against the inner side wall of the stator base 100.
[0044] In this way, the second sealing ring 540 is used to eliminate the gap between the rear end cover 510 and the inner side wall of the stator base 100, effectively improving the sealing performance between the rear end cover 510 and the stator base 100.
[0045] As Figure 8 shown, in one embodiment, a second sealing groove 512 is formed on the rear end cover 510, and the second sealing ring 540 is sleeved in the second sealing groove 512. In this way, it is ensured that the second sealing ring 540 is reliably sleeved on the rear end cover 510, preventing the second sealing ring 540 from falling off, and the sealing performance between the rear end cover 510 and the stator base 100 can be improved.
[0046] As Figure 6 shown, in one embodiment, a first bearing groove 413, an oil injection groove 414 and a through hole 415 that are communicated with each other are sequentially formed on the front end cover 410 along the axial direction. The oil injection hole 411 is communicated with the oil injection groove 414. The front bearing 420 is accommodated in the first bearing groove 413, and the rotor base 200 passes through the through hole 415, so that the inner side wall of the oil injection groove 414, the rotor base 200 and the front bearing 420 jointly enclose an oil injection cavity.
[0047] It should be noted that the front bearing 420 is adaptively installed in the first bearing groove 413, so that the grease in the oil injection cavity eliminates the gaps between the rotor base 200, the front bearing 420 and the front end cover 410, ensuring the waterproof sealing performance.
[0048] As Figure 8 shown, in one embodiment, a blind slot 513 and a second bearing slot 514 which communicate with each other are formed on a side surface of the rear end cover 510 close to the rotor seat 200. The rear end bearing 520 is received in the second bearing slot 514 so that an end of the rotor seat 200 is located in the blind slot 513.
[0049] It should be noted that the rear end bearing 520 is adaptively installed in the second bearing slot 514 so that the rear end bearing 520 is stably fixed to the rear end cover 510. The blind slot 513 is used for clearance of the rotor seat 200.
[0050] As Figure 7 and Figure 8 shown, in one embodiment, a shielding slot 515 communicating with the potting groove 511 is further formed on a side surface of the rear end cover 510 away from the rotor seat 200. The end plate 530 is received in the shielding slot 515 so that the end plate 530 closes the potting groove 511.
[0051] It should be noted that the end plate 530 is installed in the shielding slot 515 so that the side surface of the rear end cover 510 forms a planar structure, and at the same time, it is ensured that the potting groove 511 forms a sealed space.
[0052] As Figure 7 shown, in one embodiment, a plurality of wire holes 516 are formed on the inner bottom wall of the potting groove 511, and each wire 300 passes through each wire hole 516 in one-to-one correspondence. In this way, after the wire 300 passes through the wire hole 516, glue is poured into the potting groove 511 to ensure that a waterproof and sealed structure is formed in the potting groove 511.
[0053] The above-described embodiments merely represent several embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. An oil-filled sealed brushless motor, comprising a stator seat and a rotor seat passing through the stator seat, wherein the stator seat is provided with a plurality of wires, characterized in that: Also includes: A front end assembly, the front end assembly comprising a front end cover, a front end bearing and a sealing column, the front end bearing being arranged on the front end cover, and the side of the front end cover close to the front end bearing being arranged on the end of the stator seat away from the wire, so that the rotor seat sequentially and adaptively passes through the front end bearing and the front end cover, so that an oil filling cavity for injecting grease is formed between the front end cover, the front end bearing and the rotor seat, an oil filling hole communicating with the oil filling cavity is opened on the front end cover, and the sealing column is screwed on the inner side wall of the oil filling hole; and A rear end component, the rear end component includes a rear end cover, a rear end bearing and an end plate, the rear end bearing is arranged on the rear end cover, the rear end cover is arranged on an end of the stator seat close to the wire, so that the rotor seat can fit through the rear end bearing, a glue pouring groove for glue pouring is opened on the side of the rear end cover away from the stator seat, and the end plate cover is arranged at the opening of the glue pouring groove, so that each of the wires can pass through the glue pouring groove and the end plate in sequence.
2. The oil-filled sealed brushless motor according to claim 1, characterized in that: The front end assembly further includes a first sealing ring, which is sleeved on the front end cover and abuts against the inner side wall of the stator seat.
3. The oil-filled sealed brushless motor according to claim 2, characterized in that: The front end cover is provided with a first sealing groove, and the first sealing ring is sleeved in the first sealing groove.
4. The oil-filled sealed brushless motor according to claim 1, characterized in that: There are two oil filling holes, and the two oil filling holes are axially symmetrically distributed relative to the rotor seat.
5. The oil-filled sealed brushless motor according to claim 1, characterized in that: The rear end assembly further includes a second sealing ring, which is sleeved on the rear end cover and abuts against the inner side wall of the stator seat.
6. The oil-filled sealed brushless motor according to claim 5, characterized in that: The rear end cover is provided with a second sealing groove, and the second sealing ring is sleeved in the second sealing groove.
7. The oil-filled sealed brushless motor according to claim 1, characterized in that: The front end cover is provided with a first bearing groove, an oil filling groove and a through hole which are interconnected in sequence along the axial direction. The oil filling hole is connected to the oil filling groove. The front end bearing is accommodated in the first bearing groove. The rotor seat passes through the through hole, so that the inner side wall of the oil filling groove, the rotor seat and the front end bearing together form the oil filling cavity.
8. The oil-filled sealed brushless motor according to claim 1, characterized in that: A blind groove and a second bearing groove which are connected to each other are formed on one side surface of the rear end cover close to the rotor seat, and the rear end bearing is accommodated in the second bearing groove so that the end of the rotor seat is located in the blind groove.
9. The oil-filled sealed brushless motor according to claim 1, characterized in that: A shielding groove communicating with the glue pouring groove is also provided on a side surface of the rear end cover away from the rotor seat, and the end plate is accommodated in the shielding groove so that the end plate closes the glue pouring groove.
10. The oil-filled sealed brushless motor according to claim 9, characterized in that: A plurality of wire holes are provided on the inner bottom wall of the glue-filling groove, and the wires pass through the wire holes one by one.