CN115940481A - Waterproof device of permanent magnet direct drive motor - Google Patents

Abstract

The application relates to a permanent magnet direct drive motor waterproof device, relates to the technical field of waterproof devices, and aims to solve the problems that a permanent magnet direct drive motor for a submersible pump is easy to be permeated by liquid during operation under a tree, so that the motor is damaged and the safety is low. The motor comprises a shell and a sealing cover, wherein an installation cavity is formed in the surface of the shell, a motor body is installed in the installation cavity, a partition plate is arranged on the inner wall of the installation cavity, and a water blocking cover is arranged on the surface of the partition plate; the surface of the partition plate is provided with a water collecting tank, a water collecting cavity is arranged in the shell, the inner wall of the water collecting cavity is provided with a circulation hole, the water collecting cavity is communicated with the water collecting tank through the circulation hole, the bottom wall of the water collecting cavity is provided with a valve, and a water retaining assembly is arranged in the water collecting cavity; the closing cap diapire is provided with the butt ring, and the butt ring is inserted and is established into the installation intracavity, and the closing cap diapire is provided with and is used for the retaining member fixed with shell and closing cap, and the water conservancy diversion face has been seted up to the one side that the closing cap deviates from the shell. This application has the waterproof ability that improves permanent-magnet direct drive motor, improves the effect of work security.

Description

Waterproof device of permanent magnet direct drive motor

Technical Field

The application relates to the technical field of waterproof devices, in particular to a waterproof device for a permanent magnet direct drive motor.

Background

The permanent magnet direct drive motor is a motor taking a permanent magnet, a natural magnet or an artificial magnet as a stator, and the motor is widely applied to instruments and instrument lamp equipment due to small volume, large torque, high rotating speed, simple driving and reversible steering.

In the related art, the permanent magnet direct drive motor can be applied to power supply of the submersible pump, the submersible pump usually needs underwater operation, liquid can enter the motor through a gap between the speed reducer and the output shaft of the permanent magnet motor, and the motor is broken down, so that a waterproof device of the permanent magnet direct drive motor is urgently needed to protect the motor from water.

Disclosure of Invention

In order to carry out water-proof protection to permanent-magnet direct drive motor, improve the security when permanent-magnet direct drive motor operates, increase of service life, this application provides a permanent-magnet direct drive motor watertight fittings.

The application provides a permanent magnetism directly drives motor watertight fittings adopts following technical scheme:

a waterproof device of a permanent magnet direct drive motor comprises a shell and a sealing cover, wherein an installation cavity is formed in the surface of the shell, a motor body is installed in the installation cavity, a partition plate is arranged on the inner wall of the installation cavity, and a water blocking cover is arranged on the surface, away from the motor body, of the partition plate; the water collecting tank is arranged on the surface of the separating plate along the circumferential direction, a water collecting cavity is arranged in the shell and surrounds the installation cavity, a circulation hole is formed in the inner wall of the water collecting cavity, the water collecting cavity is communicated with the water collecting tank through the circulation hole, a valve is arranged on the bottom wall of the water collecting cavity, a water retaining assembly is arranged in the water collecting cavity and used for preventing accumulated water from flowing into the water collecting tank from the water collecting cavity; the utility model discloses a motor, including motor body, closing cap diapire and closing cap, closing cap diapire is provided with the butt ring, the butt ring is inserted and is established into the installation cavity and offset with the installation cavity inner wall, the closing cap diapire is provided with and is used for the retaining member fixed with shell and closing cap, the water conservancy diversion face has been seted up to the one side that the closing cap deviates from the shell, division board, manger plate lid and closing cap are passed in proper order to motor body's output shaft.

Through adopting the above-mentioned technical scheme, outside liquid can be preferred to contact with the closing cap, and flow along the water conservancy diversion face of closing cap, thereby can play the water-proof effects to motor body, little part water will enter into the installation intracavity through the clearance between closing cap and the motor body output shaft, block through the manger plate lid, make liquid flow in the ponding inslot, and flow in the ponding intracavity through the runner hole, can prevent the ponding of ponding intracavity portion to flow back in the ponding inslot through setting up the manger plate subassembly, thereby play further water-proof effects to motor body through manger plate lid and manger plate subassembly, the ponding of ponding intracavity portion will be finally inside the shell by the valve discharge, the watertight fittings of this application play the water-proof effects to motor body through manger plate and drainage two kinds of modes, the closing cap, the manger plate lid, the setting of division board can effectively separate liquid and motor body, the valve then can be with the a small amount of ponding drainage that gets into the shell, thereby reduce ponding evaporation, lead to the impaired probability of motor body, both combine, effectual water-proof effects has been played, can guarantee motor body during operation safety, the life of motor body has been prolonged.

Preferably, the water blocking cover comprises an abutting portion and a flow guiding portion, the bottom wall of the abutting portion is provided with a mounting ring along the circumferential direction, the surface of the division plate is provided with an annular groove for the mounting ring to insert, the diameter of the abutting portion is gradually reduced from one end close to the division plate to one end deviating from the division plate, the flow guiding portion is connected to one side deviating from the division plate of the abutting portion, and a flow guiding arc surface is arranged at the joint of the flow guiding portion and the abutting portion.

Through adopting above-mentioned technical scheme, set up the collar at butt portion diapire, can improve the tight degree of being connected of butt portion and division board, reduce ponding and pass through the clearance between retaining lid and the division board, the probability of harm is caused to the inside motor body of installation cavity, the diameter change of butt portion mutually supports with the water conservancy diversion cambered surface of water conservancy diversion portion simultaneously, can play better drainage effect for ponding can flow to ponding groove and finally get into the ponding intracavity along the incline direction, has higher practicality and security.

Preferably, the partition plate is provided with a mounting hole in a penetrating manner along the thickness direction, a rotating bearing is arranged in the mounting hole, the end wall of one end, extending out of the mounting hole, of the rotating bearing is abutted against the inner top wall of the abutting part, and the output shaft of the motor body penetrates through the inner ring of the rotating bearing; the oil cavity is formed in the bottom wall of the flow guide portion, lubricating oil used for lubricating the rotating bearing is filled in the oil cavity, a sealing ring piece is arranged in the oil cavity and abuts against the top wall of the oil cavity, and an embedding groove for clamping the sealing ring piece is formed in the outer wall of an output shaft of the motor body in the circumferential direction.

By adopting the technical scheme, the rotary bearing is arranged, so that the problems that a gap between the output shaft of the motor body and the partition plate is enlarged due to abrasion generated between the output shaft and the partition plate when the output shaft rotates, and the motor body is easily damaged by accumulated water can be effectively solved, and the rotary bearing has higher practicability and safety; through seting up oil pocket and seal ring piece, can reduce ponding on the one hand and get into the installation cavity through the clearance between the output shaft of water conservancy diversion portion and motor body, lead to the impaired problem of motor body, on the other hand can make rolling bearing can the steady operation through lubricating oil, and the effect that stable performance reduces motor body output shaft wearing and tearing.

Preferably, the outer wall of the rotating bearing in the abutting portion is sleeved with an oil seal, and the oil seal abuts against the inner wall of the abutting portion.

Through adopting above-mentioned technical scheme, set up the oil blanket and can effectively reduce the probability that lubricating oil leaked from between rolling bearing and the oil pocket, also can prevent outside ponding simultaneously and enter into inside the rolling bearing through the clearance between butt portion and the division board, and then lead to the impaired condition of motor body, further improved the watertight fittings's of this application water-proof effects.

Preferably, the water retaining assembly comprises a fixed ring plate and a movable ring plate which are sleeved on the outer wall of the mounting cavity, the fixed ring plate is connected with the inner wall of the water accumulation cavity, the fixed ring plate is positioned on one side, away from the sealing cover, of the circulation hole, the movable ring plate is positioned on one side, away from the circulation hole, of the fixed ring plate, and the movable ring plate can slide along the length direction of the outer wall of the mounting cavity; the fixed ring plate is provided with a first water hole in the thickness direction in a penetrating mode, the top wall of the movable ring plate is provided with a second insertion block, the second insertion block can be inserted into the first water hole, the movable ring plate is provided with a second water hole in the thickness direction in a penetrating mode, the bottom wall of the fixed ring plate is provided with a plurality of first insertion blocks, and the first insertion blocks can be inserted into the second water hole.

By adopting the technical scheme, accumulated water flows into the accumulated water cavity from the accumulated water tank through the circulation hole, and then enters the bottom wall of the accumulated water cavity through the first water hole and the second water hole to wait for the same valve to be discharged; when ponding intracavity portion ponding is more, ponding exists the possibility that the recharge got into ponding inslot portion, therefore, movable crown plate will move towards the direction of fixed crown plate under the buoyancy effect of ponding, insert when first inserted block and establish in the second water hole, the second inserted block is inserted and is established the downthehole back of second water, fixed crown plate and movable crown plate will make ponding only can stop in movable crown plate below, make in the unable recharge entering ponding inslot of ponding, the effect to the one-way switch-on of ponding has been played, the structure safety of installing intracavity motor body has effectively been protected, and high practicability is achieved.

Preferably, the water retaining assembly further comprises a limiting rod, one end of the limiting rod is connected with the bottom wall of the fixed ring plate, the other end of the limiting rod penetrates through the movable ring plate and is connected with the bottom wall of the water accumulation cavity, and the movable ring plate can slide along the length direction of the limiting rod.

Through adopting above-mentioned technical scheme, set up the gag lever post and can restrict the moving direction of movable crown plate for movable crown plate is unable rotatory, thereby can make first inserted block, second inserted block can insert more accurately and establish inside corresponding first water hole or the second water hole, thereby further improved water retaining component's manger plate effect, had higher practicality.

Preferably, the valve comprises a valve body, two air guide hoods, a drainage block, a tightening column, an elastic part and a mounting piece, wherein a water inlet of the valve body is communicated with a water accumulation cavity, one air guide hood is connected to the inner wall of the water inlet of the valve body, the other air guide hood is connected to the inner wall of the water outlet of the valve body, one ends, close to each other, of the two air guide hoods are both in a necking shape, the drainage block is connected between the air guide hoods on the two sides and is hollow, the drainage block is communicated with the two air guide hoods, the tightening column sequentially penetrates through the air guide hoods and the drainage block which deviate from the shell and is inserted into the air guide hoods on one sides close to the shell, the diameter of one part of the outer wall of the tightening column is larger than the diameter of the necking part of the air guide hoods close to the shell, a reset hole for mounting the elastic part is formed in the end wall of the tightening column, the mounting piece is connected with the inner wall of the air guide hoods which deviate from the shell, one end of the elastic part extends out of the reset hole and is connected with the mounting piece, the outer wall of the tightening column penetrates through the reset hole in the thickness direction and is provided with a water outlet hole, and the mounting piece is provided with a plurality of the water outlet hole in the thickness direction.

Through adopting above-mentioned technical scheme, when ponding intracavity ponding is more, ponding just can be for supporting tight post and exert pressure, thereby promote to support tight post and remove towards the direction of installation piece, the elastic component at this moment also can be compressed, and then ponding will enter into the inside of the drainage block, wash port through supporting tight post lateral wall gets into in the reset hole, and finally discharge through the dewatering hole on installation piece surface, when ponding intracavity ponding is less, the produced pressure of ponding will be not enough to continue compression elastic component, support tight post at this moment and will kick-back under the elastic force of elastic component, and prevent ponding further to enter into in the drainage block, otherwise, outside liquid then can't reverse promotion after entering into the drainage block support tight post, thereby make the valve possess liquid one-way flow's ability, outside liquid recharge has been improved, lead to the impaired problem of the inside motor body of shell, the water-proof effects of this application has further been improved.

Preferably, the inner wall of the water accumulation cavity is obliquely arranged towards the water inlet of the valve body.

Through adopting above-mentioned technical scheme, the water of ponding intracavity portion will flow towards the direction of valve body water inlet to make to support tight post and can bear more pressure, make the ponding of ponding intracavity discharge fast, it is too much to have improved ponding intracavity ponding, leads to the problem that motor body damaged, has higher practicality.

Preferably, the retaining member includes inserted sheet, joint piece and reset torsion spring, the inserted sheet is connected in the closing cap diapire, shell surface sets up and supplies the inserted sheet to insert the spread groove of establishing, the groove of stepping down has been seted up to the spread groove inner wall, the joint piece rotates with the inslot wall of stepping down to be connected, the locking groove that supplies the joint piece to go into is seted up to the inserted sheet lateral wall, reset torsion spring links to each other with the joint piece, reset torsion spring is used for driving the joint piece and breaks away from the groove of stepping down and supports into the locking inslot.

Through adopting above-mentioned technical scheme, set up the inserted sheet and can realize the zonulae occludens to closing cap and shell, behind the locking groove is gone into to joint piece card, can make the closing cap be connected inseparabler with the shell, reduced inside liquid enters into the installation cavity through the clearance between closing cap and the shell, lead to the probability that motor body damaged, further improved the watertight fittings's of this application waterproof performance.

Preferably, the butt ring is located directly over the ponding groove, butt ring inner wall is provided with a plurality of direction pieces, the one end that the direction piece deviates from the butt ring all sets up towards closing cap diapire direction slope, motor body's output shaft outer wall cover is equipped with the guide ring, the guide ring offsets with the closing cap diapire, the guide ring outer wall links to each other with the guide piece.

Through adopting above-mentioned technical scheme, after liquid permeates from the clearance of closing cap, because liquid is less, just can flow along the length direction of guide vane to in falling into the ponding groove, reduced the probability of liquid and manger plate lid contact, thereby can further improve the waterproof ability of this application.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sealing cover and the water retaining cover can isolate external liquid from the motor body, so that the problem that the motor body is damaged due to the fact that the liquid permeates into the motor body can be directly solved, the working safety of the motor body is protected, the service life of the motor body is prolonged, and high safety and economic benefits are achieved;

2. through setting up manger plate subassembly and valve for the ponding that gets into the ponding intracavity can only one-way circulation, has reduced ponding and has recharged into the ponding groove, leads to the impaired probability of motor body, has formed drainage structures, combines together with manger plate structures such as closing cap and manger plate lid, has realized the water-proof effects to motor body through the mode high efficiency of manger plate and drainage.

Drawings

Fig. 1 is a schematic structural diagram of a waterproof device for a direct drive permanent magnet motor according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present application.

Fig. 3 is a partially enlarged view of a point a in fig. 2.

Fig. 4 is a schematic structural view of a guide vane and a guide ring according to an embodiment of the present application.

Fig. 5 is a partially enlarged view at B in fig. 1.

Description of the reference numerals: 1. a housing; 11. a mounting cavity; 12. a water accumulation cavity; 13. a flow-through hole; 14. connecting grooves; 15. a yielding groove; 2. sealing the cover; 21. a butting ring; 22. a flow guide surface; 23. a guide piece; 24. a guide ring; 3. a motor body; 31. embedding a groove; 4. a partition plate; 41. a water accumulation tank; 42. a ring groove; 43. mounting holes; 44. a rotating bearing; 45. oil sealing; 5. a water blocking cover; 51. an abutting portion; 511. a mounting ring; 52. a flow guide part; 521. a flow guide arc surface; 522. an oil chamber; 523. a sealing ring sheet; 6. a valve; 61. a valve body; 62. a dome; 63. a drainage block; 64. tightly abutting against the column; 641. a reset hole; 642. a drain hole; 65. an elastic member; 66. mounting a sheet; 661. a water outlet hole; 7. a water retaining assembly; 71. a stationary ring plate; 711. a first water hole; 712. a first insert block; 72. a movable ring plate; 721. a second water hole; 722. a second insert block; 73. a limiting rod; 8. a locking member; 81. inserting sheets; 811. a locking groove; 82. a clamping block; 83. a return torsion spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses permanent magnet direct drive motor watertight fittings. Referring to fig. 1, the waterproof device for the permanent magnet direct drive motor comprises a shell 1 and a sealing cover 2, wherein a mounting cavity 11 is formed in the shell 1, a stator of a motor body 3 is connected to the bottom wall of the mounting cavity 11 through welding, and a rotor of the motor body 3 extends out of the mounting cavity 11; 2 lids of closing cap fit 11 opening part outer walls in installation cavity, the rotor of motor body 3 passes closing cap 2, 2 diapire integrated into one piece of closing cap have butt ring 21, butt ring 21 sets up along the circumference direction of closing cap 2, butt ring 21 inserts and establishes in installation cavity 11 and offsets with the installation cavity 11 inner wall, water conservancy diversion face 22 has been seted up to the one side that closing cap 2 deviates from shell 1, water conservancy diversion face 22 sets up towards perisporium direction slope from the centre of a circle department of closing cap 2, thereby can make liquid flow along the direction of water conservancy diversion face 22, thereby can reduce the infiltration of outside liquid to shell 1 and closing cap 2, carry out effective water proof to motor body 3.

Referring to fig. 2 and 3, a locking member 8 for improving connection stability is arranged between the sealing cover 2 and the housing 1, the locking member 8 includes a plurality of inserting pieces 81, a plurality of clamping blocks 82 and a plurality of reset torsion springs 83, the plurality of inserting pieces 81 are integrally formed on the bottom wall of the sealing cover 2, the plurality of inserting pieces 81 are uniformly distributed along the circumferential direction of the sealing cover 2, the surface of the housing 1 is provided with a plurality of connecting grooves 14 for the inserting pieces 81 to be inserted, the inner walls of the connecting grooves 14 are provided with abdicating grooves 15, the clamping blocks 82 are rotatably connected to the inner walls of the abdicating grooves 15, the side walls of the inserting pieces 81 are provided with locking grooves 811 for the clamping blocks 82 to abut into, the locking grooves 811 are mutually matched with the clamping blocks 82 in shape, and the reset torsion springs 83 are connected to the rotating connection positions of the clamping blocks 82 and the inner walls of the abdicating grooves 15; when the inserting piece 81 is inserted into the connecting groove 14, the inserting piece 81 abuts against the clamping block 82, the clamping block 82 can temporarily retract into the abdicating groove 15 under the acting force of the inserting piece 81, after the abdicating groove 15 is aligned with the locking groove 811, under the action of the reset torsion spring 83, the clamping block 82 can pop out of the abdicating groove 15 and abut against the locking groove 811, so that the sealing cover 2 and the shell 1 are locked, and the connecting stability is improved.

Referring to fig. 1 and 4, closing cap 2 diapire integrated into one piece has guide ring 24, guide ring 24 and the coaxial setting of butt ring 83, motor body 3's output shaft outer wall is located to guide ring 24 cover, guide ring 24 outer wall integrated into one piece has a plurality of guide vanes 23, the direction slope setting of the guide vane 23 other end towards installation cavity 11 diapire and with the butt ring 83 diapire continuous, make the drop of water that gets into installation cavity 11 through the clearance between motor body 3 output shaft and the closing cap 2 can slide along the length direction of guide vane 23, thereby reduce the harm that can motor body 3 cause.

Referring to fig. 1 and 5, a partition plate 4 is connected to the inner wall of the mounting cavity 11 through welding, the partition plate 4 is located on one side, close to the sealing cover 2, of the motor body 3, an output shaft of the motor body 3 penetrates through the partition plate 4, a mounting hole 43 penetrates through the partition plate 4 along the thickness direction, a rotating bearing 44 is connected to the inner wall of the mounting hole 43 through welding, the output shaft of the motor body 3 is connected with the output shaft of the motor body 3 through a key connection mode, abrasion between the output shaft of the motor body 3 and the partition plate 4 can be reduced, and therefore the motor body 3 is further protected through the partition plate 4.

Referring to fig. 1 and 5, a water blocking cover 5 is arranged on the surface of the partition plate 4 departing from the motor body 3, the water blocking cover 5 is arranged coaxially with the partition plate 4, the output shaft of the motor body 3 penetrates through the water blocking cover 5, the water blocking cover 5 comprises an abutting part 51 and a flow guiding part 52, and the abutting part 51 and the flow guiding part 52 are integrally formed. The diameter of butt portion 51 reduces gradually from the one end that is close to division board 4 towards the one end that deviates from division board 4, thereby can carry out the water conservancy diversion to the liquid that falls on butt portion 51 surface, butt portion 51 diapire integrated into one piece has collar 511, division board 4 surface is seted up and is supplied collar 511 to inlay the annular 42 of establishing, collar 511 and the mutual adaptation of annular 42 shape, thereby can reduce ponding and get into division board 4 below through the clearance between butt portion 51 and the division board 4, lead to the impaired problem of motor body 3, butt portion 51 cover is located the rolling bearing 44 outside, rolling bearing 44 one end is stretched out division board 4 and is abutted with butt portion 51 inner wall.

Referring to fig. 1 and 5, the connection part 51 of the flow guide part 52 is connected to one end of the abutting part 51 away from the partition plate 4, the diameter of the flow guide part 52 is smaller than that of any one of the abutting parts 51, and a flow guide arc surface 521 for guiding liquid is formed at the connection part of the flow guide part 52 and the abutting part 51, so that the liquid can flow along the flow guide arc surface 521; an oil cavity 522 is formed in the bottom wall of the flow guide part 52, lubricating oil is filled in the oil cavity 522 and is in contact with the rotating bearing 44, so that the rotating bearing 44 can be lubricated, and the working effect of the rotating bearing 44 is kept; an embedded groove 31 is formed in the circumferential direction of the outer wall of the motor body 3, which is located in the oil cavity 522, a sealing ring piece 523 is sleeved in the embedded groove 31, the side wall of the sealing ring piece 523 abuts against the inner wall of the oil cavity 522, and the top wall abuts against the top wall of the oil cavity 522, so that the problem that liquid enters the oil cavity 522 through a gap between the flow guide part 52 and an output shaft of the motor body 3 can be solved; the outer wall of the rotating bearing 44 extending out of the mounting hole 43 is sleeved with an oil seal 45, so that leakage of lubricating oil can be prevented, and the problem that liquid enters the lower portion of the partition plate 4 through the rotating bearing 44 to cause damage to the motor body 3 can be solved.

Referring to fig. 1 and 5, a water accumulation groove 41 is formed in the surface of the joint of the partition plate 4 and the inner wall of the installation cavity 11 along the circumferential direction, and the water accumulation groove 41 is positioned right below the abutting ring 21 and can receive liquid sliding down along the guide sheet 23; seted up ponding chamber 12 in the shell 1, ponding chamber 12 encircles 11 outer walls of installation cavity and sets up, and the circulation hole 13 has been seted up along the thickness direction through to 11 outer walls of installation cavity to be used for communicating ponding groove 41 with ponding chamber 12, make ponding in the ponding groove 41 can flow in the ponding chamber 12. The bottom wall of the ponding cavity 12 is communicated with the valve 6, and the bottom wall of the ponding cavity 12 is obliquely arranged towards the water inlet of the valve 6.

Referring to fig. 1 and 5, the valve 6 includes a valve body 61, two fairleads 62, the drainage block 63, support tight post 64, elastic component 65 and installation piece 66, the valve body 61 is the hollow pipeline, the valve body 61 communicates with ponding chamber 12, one of them fairlead 62 is through welded connection in the water inlet inner wall of valve body 61, another fairlead 62 is through welded connection in the delivery port inner wall of valve body 61, the one end opening that two fairleads 62 are close to each other all is the setting of throat form, and the throat diameter of the fairlead 62 that is close to ponding chamber 12 is less than the diameter of the fairlead 62 that deviates from ponding chamber 12.

Referring to fig. 1 and 5, a drainage block 63 is connected between the fairings 62 at two sides by welding, the drainage block 63 is hollow and communicated with the fairings 62, a support column 64 is inserted into the fairings 62 at the other end from the fairings 62 at one end away from the water accumulation cavity 12, the support column 64 can freely slide in the fairings 62 away from the water accumulation cavity 12, the end part of the support column 64 inserted into the fairings 62 at one end close to the water accumulation cavity 12 is a cambered surface and can be abutted against the inner wall of the fairings 62, so that the support column 64 stops moving; the end wall of one end of the abutting column 64, which is far away from the water accumulation cavity 12, is provided with a reset hole 641 for installing the elastic piece 65, in the embodiment, the elastic piece 65 is a spring, one end of the elastic piece 65 is connected to the bottom wall of the reset hole 641 through gluing, the installation sheet 66 is arranged on the inner wall of the air guide sleeve 62, which is far away from the water accumulation cavity 12, and is connected with the inner wall of the air guide sleeve 62 through welding, and the elastic piece 65 penetrates through the drainage block 63 and is connected with the surface of the installation sheet 66 through gluing, so that the abutting column 64 can move towards the installation sheet 66 under the action of water pressure; support tight post 64 and be located the lateral wall of drainage piece 63 and run through and seted up wash port 642, wash port 642 and reset hole 641 intercommunication, installation piece 66 runs through along thickness direction and has seted up a plurality of apopores 661, by the compression when elastic component 65, support tight post 64 and be supported in the drainage piece 63, ponding just can enter into in the drainage piece 63 and circulate through wash port 642 and reset hole 641, finally discharge valve body 61 through apopore 661, the valve 6 of this application has the ability that makes ponding only can one-way circulate, can prevent effectively that outside liquid from recharging from getting into the casing, good guard action has been played to inside motor body 3.

Referring to fig. 1 and 5, a water retaining assembly 7 for preventing accumulated water in the accumulated water chamber 12 from being back-filled into the accumulated water tank 41 is arranged in the accumulated water chamber 12, the water retaining assembly 7 includes a fixed ring plate 71, a movable ring plate 72 and a plurality of limiting rods 73, the fixed ring plate 71 is sleeved on the outer wall of the installation chamber 11 and is respectively connected with the inner wall of the accumulated water chamber 12 and the outer wall of the installation chamber 11 through welding, the fixed ring plate 71 is located on one side of the circulation hole 13 close to the accumulated water chamber 12, the limiting rods 73 are all connected to the bottom wall of the fixed ring plate 71 through welding, the other end of the limiting rod 73 is connected to the bottom wall of the accumulated water chamber 12 through welding, the movable ring plate 72 is sleeved on the outer wall of the installation chamber 11 and can slide along the length direction of the limiting rods 73, and the movable ring plate 72 is located on one side of the fixed ring plate 71 away from the circulation hole 13; the fixed ring plate 71 is provided with a plurality of first water holes 711 along the thickness direction in a penetrating manner, the movable ring plate 72 is provided with a plurality of second water holes 721 along the thickness direction in a penetrating manner, and accumulated water enters the bottom wall of the accumulated water cavity 12 through the first water holes 711 and the second water holes 721 after entering the accumulated water cavity 12 to wait for discharge;

referring to fig. 1 and 5, the bottom wall of the fixed ring plate 71 is integrally formed with a plurality of first insert blocks 712, each first insert block 712 corresponds to one second water hole 721, the top wall of the movable ring plate 72 is integrally formed with a plurality of second insert blocks 722, each second insert block 722 corresponds to one first water hole 711, when the accumulated water in the accumulated water chamber 12 is large, the movable ring plate 72 will rise under the buoyancy of the accumulated water, so that the first insert blocks 712 are inserted into the second water holes 721, the second insert blocks 722 are inserted into the first water holes 711, so that the accumulated water below the movable ring plate 72 is difficult to pass through and flow back into the accumulated water tank 41, and after the accumulated water is discharged through the valve 6, the movable ring plate 72 will fall down to effectively protect the motor body 3 in the installation chamber 11. In this embodiment, a gap exists between the first water hole 711 and the second insert 722, and a gap exists between the second water hole 721 and the first insert 712, so that a small portion of accumulated water can continuously flow below the movable ring plate 72 to increase the water pressure.

The implementation principle of the permanent magnet direct drive motor waterproof device in the embodiment of the application is as follows: when the motor body 3 is operated underwater, external liquid firstly contacts the seal cover 2, most of the liquid flows away along the flow guide surface 22, and a small amount of the liquid enters the installation cavity 11 through a gap between the seal cover 2 and an output shaft of the motor body 3; the liquid entering above the partition plate 4 flows along the guide piece 23 and falls into the water collection tank 41, and a small part of the liquid falls on the surface of the water stop cover 5 and flows along the inclined part of the flow guide arc surface 521 and the abutting part 51 and enters the water collection tank 41;

the accumulated water in the water accumulating tank 41 flows into the water accumulating cavity 12 through the circulation hole 13 and sequentially passes through the first water hole 711 and the second water hole 721 to enter the bottom wall of the water accumulating cavity 12, when the water level in the water accumulating cavity 12 rises, the movable annular plate 72 floats upwards due to the buoyancy of the fixed annular plate 71, the first insert block 712 is inserted into the first water hole 711, and the second insert block 722 is inserted into the second water hole 721, so that the accumulated water in the water accumulating cavity 12 is prevented from flowing back into the water accumulating tank 41; when the pressure of the ponding of ponding chamber 12 was enough to compress elastic component 65, the butt post will be promoted, and ponding will be through in drainage piece 63 discharge shell 1 to similar with manger plate subassembly 7 structure, can play the effect that prevents ponding recharge, realize the drainage function. The utility model provides a permanent magnetism directly drives motor watertight fittings can realize waterproof effect high-efficiently through combining manger plate and drainage, has protected the security of motor body 3 during operation, prolongs motor body 3's life, has higher security and economic benefits.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a permanent magnetism directly drives motor watertight fittings which characterized in that: the motor comprises a shell (1) and a sealing cover (2), wherein a mounting cavity (11) is formed in the surface of the shell (1), a motor body (3) is installed in the mounting cavity (11), a partition plate (4) is arranged on the inner wall of the mounting cavity (11), and a water blocking cover (5) is arranged on the surface, deviating from the motor body (3), of the partition plate (4); the water collecting tank (41) is formed in the surface of the partition plate (4) along the circumferential direction, a water collecting cavity (12) is formed in the shell (1), the water collecting cavity (12) is formed around the mounting cavity (11), a circulation hole (13) is formed in the inner wall of the water collecting cavity (12), the water collecting cavity (12) is communicated with the water collecting tank (41) through the circulation hole (13), a valve (6) is arranged on the bottom wall of the water collecting cavity (12), a water retaining component (7) is arranged in the water collecting cavity (12), and the water retaining component (7) is used for preventing accumulated water from flowing into the water collecting tank (41) from the water collecting cavity (12); closing cap (2) diapire is provided with butt ring (21), butt ring (21) are inserted and are established in installation cavity (11) and offset with installation cavity (11) inner wall, closing cap (2) diapire is provided with and is used for retaining member (8) with shell (1) and closing cap (2), water conservancy diversion face (22) have been seted up to the one side that closing cap (2) deviates from shell (1), division board (4), manger plate lid (5) and closing cap (2) are passed in proper order to the output shaft of motor body (3).

2. The waterproof device of the permanent magnet direct drive motor according to claim 1, characterized in that: the utility model discloses a water retaining cover, including water retaining cover (5) butt portion (51) and water conservancy diversion portion (52), butt portion (51) diapire is provided with collar (511) along the circumferential direction, division board (4) surface is seted up along the circumferential direction and is supplied collar (511) to insert annular (42) of establishing, the diameter of butt portion (51) reduces gradually from the one end that is close to division board (4) towards the one end that deviates from division board (4), water conservancy diversion portion (52) are connected in the one side that butt portion (51) deviates from division board (4), water conservancy diversion portion (52) and butt portion (51) junction are provided with water conservancy diversion cambered surface (521).

3. The waterproof device for the direct drive permanent magnet motor according to claim 2, characterized in that: a mounting hole (43) penetrates through the partition plate (4) along the thickness direction, a rotating bearing (44) is arranged in the mounting hole (43), the end wall of one end, extending out of the mounting hole (43), of the rotating bearing (44) abuts against the inner top wall of the abutting part (51), and the output shaft of the motor body (3) penetrates through the inner ring of the rotating bearing (44); oil pocket (522) have been seted up to water conservancy diversion portion (52) diapire, oil pocket (522) intussuseption is filled with and is used for carrying out lubricated lubricating oil to swivel bearing (44), be provided with in oil pocket (522) seal ring piece (523), seal ring piece (523) and oil pocket (522) roof counterbalance, inlay of confession seal ring piece (523) joint establishes groove (31) is seted up along the circumferential direction to the output shaft outer wall of motor body (3).

4. The waterproof device for the direct drive permanent magnet motor according to claim 3, characterized in that: the outer wall of the rotating bearing (44) in the abutting part (51) is sleeved with an oil seal (45), and the oil seal (45) abuts against the inner wall of the abutting part (51).

5. The waterproof device for the direct drive permanent magnet motor according to claim 1, characterized in that: the water retaining assembly (7) comprises a fixed ring plate (71) and a movable ring plate (72), the fixed ring plate (71) is sleeved on the outer wall of the installation cavity (11), the fixed ring plate (71) is connected with the inner wall of the water accumulation cavity (12), the fixed ring plate (71) is positioned on one side, away from the sealing cover (2), of the circulation hole (13), the movable ring plate (72) is positioned on one side, away from the circulation hole (13), of the fixed ring plate (71), and the movable ring plate (72) can slide along the length direction of the outer wall of the installation cavity (11); fixed crown plate (71) thickness direction is run through and has been seted up first water hole (711), movable crown plate (72) roof is provided with second inserted block (722), second inserted block (722) can be inserted and is established in first water hole (711), movable crown plate (72) are run through along thickness direction and have been seted up second water hole (721), fixed crown plate (71) diapire is provided with a plurality of first inserted blocks (712), first inserted block (712) can be inserted and is established in second water hole (721).

6. The waterproof device for the direct drive permanent magnet motor according to claim 5, is characterized in that: the water retaining assembly (7) further comprises a limiting rod (73), one end of the limiting rod (73) is connected with the bottom wall of the fixed ring plate (71), the other end of the limiting rod (73) penetrates through the movable ring plate (72) and is connected with the bottom wall of the water accumulation cavity (12), and the movable ring plate (72) can slide along the length direction of the limiting rod (73).

7. The waterproof device of the permanent magnet direct drive motor according to claim 1, characterized in that: the valve (6) comprises a valve body (61), two air guide sleeves (62), a drainage block (63), a support tight column (64), an elastic piece (65) and an installation piece (66), a water inlet and a water accumulation cavity (12) of the valve body (61) are communicated, one of the water guide sleeves (62) are connected to the inner wall of the water inlet of the valve body (61), the other air guide sleeve (62) is connected to the inner wall of the water outlet of the valve body (61), the two ends, close to each other, of the air guide sleeves (62) are both in a necking shape, the drainage block (63) is connected between the air guide sleeves (62) on two sides, the drainage block (63) is internally hollow, the drainage block (63) is communicated with the two air guide sleeves (62), the support tight column (64) sequentially passes the air guide sleeve (62) and the drainage block (63) deviating from the shell (1) and is inserted into the air guide sleeve (62) on one side close to the shell (1), the diameter of the outer wall of the support tight column (64) is greater than the position of the air guide sleeve (62) close to the shell (1), one end wall (641) is connected with the installation piece (641), and one end wall (66) of the elastic piece (64) is connected with the installation piece (641), and one end wall (64) of the installation piece (641) is provided with the end wall (65) which is provided with the end wall (64), the outer wall of the abutting column (64) located in the drainage block (63) is provided with a drainage hole (642) in a penetrating mode along the thickness direction, the drainage hole (642) is communicated with the reset hole (641), and the mounting piece (66) is provided with a plurality of water outlet holes (661) in a penetrating mode along the thickness direction.

8. The waterproof device for the direct drive permanent magnet motor according to claim 7, characterized in that: the inner wall of the water accumulation cavity (12) is obliquely arranged towards the water inlet of the valve body (61).

9. The waterproof device of the permanent magnet direct drive motor according to claim 1, characterized in that: retaining member (8) include inserted sheet (81), joint piece (82) and reset torsion spring (83), inserted sheet (81) are connected in closing cap (2) diapire, shell (1) surface is seted up and is supplied inserted sheet (81) to insert spread groove (14) of establishing, spread groove (14) inner wall has been seted up and has been stepped down groove (15), joint piece (82) are connected with the rotation of groove (15) inner wall that steps down, locking groove (811) that supply joint piece (82) to go into are seted up to inserted sheet (81) lateral wall, reset torsion spring (83) link to each other with joint piece (82), reset torsion spring (83) are used for driving joint piece (82) to break away from and step down groove (15) and support into in locking groove (811).

10. The waterproof device of the permanent magnet direct drive motor according to claim 1, characterized in that: the utility model discloses a motor, including motor body (3), butt ring (21), one end that the butt ring (21) is located ponding groove (41) directly over, butt ring (21) inner wall is provided with a plurality of guide pieces (23), the one end that guide piece (23) deviate from butt ring (21) all sets up towards closing cap (2) diapire direction slope, the output shaft outer wall cover of motor body (3) is equipped with guide ring (24), guide ring (24) and closing cap (2) diapire offset, guide ring (24) outer wall links to each other with guide piece (23).

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