Waterproof brushless pump motor

Abstract

The utility model discloses a pump class waterproof brushless motor, which comprises a shell, a stator, an upper end cover and a lower end cover, the stator is provided with an insulating sleeve, a winding coil and a connector assembly, the connector assembly is provided with a conductive wiring block, a wiring installation seat and a wire bunching block, the wiring installation seat is an arc-shaped block body extending along the circumferential direction of the stator, and the wiring installation seat is provided with a wire bunching block. The arc-shaped block body is in fastening fit with part of the wire tripping column in the insulating sleeve, the lower end of the conductive wiring block is inserted into the wire tripping column, one side of the conductive wiring block is provided with a jacking structure which is in jacking fit with the wiring mounting base, the winding connecting wire is wound on the jacking structure, and the upper end of the conductive wiring block upwards penetrates through the wiring mounting base in a tight fit mode. A connecting wire is installed at the upper end of the conductive wiring block, the bunching block is a waterproof block, the connecting wire penetrates through the bunching block in a tight fit mode, the bunching block and the shell are integrally formed into a stator body in an injection molding mode, and the lower end of the stator body is connected with the upper end of the lower end cover in a sealed mode. Compared with the prior art, the stator and the shell are integrally formed, the waterproof effect is better, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the field of waterproof motors, and particularly to waterproof brushless motors for pumps. Background Technology

[0002] Existing brushless motors generally include a housing, rotor, stator, and shaft. Both the stator and rotor are housed within the housing. The rotor rotates within the housing and is made of permanent magnets. The stator is fixed within the housing and fitted onto the outside of the rotor. The shaft rotates within the housing and is fixedly connected to the rotor. One end of the shaft extends out of the housing, and the end extending out of the housing is the front end. A front cover is sealed on the front end of the housing, and a rear cover is sealed on the rear end of the housing. In this type of motor, the housing is injection molded. During processing, the stator is manufactured independently first and then placed in the injection mold to be integrally injection molded with the housing. Finally, the rotor and shaft are installed within the housing and sealed with the front and rear covers. The existing stator includes an insulating frame, winding coils, stator core, and connectors. The end face of the insulating frame extends with trip posts. The winding coils are wound on the insulating frame, and the stator core is located on the outer surface of the insulating frame. The winding coils are connected in series through winding connecting wires, which are wound around the trip posts. The winding connecting wires are electrically connected to the connectors. The connectors are located on the outer wall of the motor housing, and the housing has an integrally injection-molded housing for accommodating the connectors. The housing has an interface for external wiring to be electrically plugged into the connectors.

[0003] However, the connectors of this type of motor have insertion interfaces on the outer wall of the housing. If the external environment is not moist, water can easily seep into the connectors from the insertion interfaces of the housing, resulting in poor waterproofing and short service life.

[0004] In view of this, the inventors of this case conducted in-depth research on the problem, which led to the creation of this case. Utility Model Content

[0005] The purpose of this invention is to provide a waterproof brushless motor for pumps, in order to solve the problem that water can easily seep into the casing of existing motors, resulting in poor waterproof performance and short service life.

[0006] To achieve its purpose, this utility model adopts the following technical solution:

[0007] This is a waterproof brushless motor for pumps, comprising a housing, rotor, shaft, stator, and end covers. The end covers are an upper end cover and a lower end cover, respectively sealingly mounted on the upper and lower ends of the housing. The stator is fixed inside the housing and sleeved on the outside of the rotor. The shaft is rotatably positioned within the housing and fixedly connected to the rotor. One end of the shaft extends into the lower end cover and is sealed to it. The stator has an insulating sleeve, winding coils, and connectors. Several spaced, circularly distributed tripwire posts extend integrally from the lower end face of the insulating sleeve. Winding connecting wires are connected to the winding coils and wound around the tripwire posts. The connector is electrically connected; the connector has a conductive terminal block, a terminal mounting base, and a wire harness block. The terminal mounting base is an arc-shaped block extending circumferentially along the stator. The arc-shaped block is tightly fitted with a portion of the trip posts in the insulating sleeve. The upper end of the conductive terminal block is inserted into the trip posts, and one side of the conductive terminal block has a support structure that supports the terminal mounting base. The winding connecting wire is wound on the support structure. The lower end of the conductive terminal block passes through the terminal mounting base downwards. A connecting wire is installed on the lower end of the conductive terminal block. The wire harness block is a waterproof block. The connecting wire passes through the wire harness block. The wire harness block and the outer shell are integrally injection molded into the stator body.

[0008] The stator body has an integrally injection-molded upper mounting shell and a lower mounting shell. The lower mounting shell is located below the upper mounting shell, and both the upper and lower mounting shells are hollow structures that are interconnected. The stator is located inside the upper mounting shell and is sleeved on the rotor. The stator's wire harness block is located on the lower mounting shell. The lower end of the stator's conductive terminal block extends downward into the lower mounting shell and is positioned opposite to the wire harness block. The inner diameter of the upper mounting shell is smaller than the inner diameter of the lower mounting shell, and a sealing groove is formed between the inner sidewall of the upper mounting shell and the inner sidewall of the lower mounting shell. The upper end of the lower end cover is sealed and embedded in the sealing groove and connected to the lower mounting shell.

[0009] The wiring mounting base has a lower plate and a side plate. Both the lower plate and the side plate are convex arc plates that bulge outward. The side plate is located outside the top surface of the lower plate, and the top surface of the lower plate is provided with several partition plates that connect to the inner side of the side plate. A locking groove is formed between each pair of partition plates, the lower plate, and the side plate for a tripping post to engage. The top holding structure of the conductive wiring block is held on the top surface of the lower plate, and the lower end of the conductive wiring block extends out of the lower plate and is integrally formed with the lower plate.

[0010] The conductive terminal block is a metal conductive block. The conductive terminal block has a terminal segment, a connecting segment, and a winding segment. The terminal segment, connecting segment, and winding segment are arranged in sequence, and the terminal segment and the winding segment are connected by the connecting segment. The terminal segment has a vertically arranged strip structure. The lower end of the terminal segment extends out of the bottom surface of the lower plate and is connected to the connecting wire. The connecting segment has a vertically arranged horizontal part and a vertical part. The vertical part is located on the upper side of the terminal segment, and the horizontal part is located on the lower outer side of the vertical part. The winding segment is located on the side of the horizontal part facing away from the terminal segment, and the winding connecting wire is wound on the winding segment.

[0011] The winding segment has two clamps, which are arranged vertically opposite each other. The upper clamp is connected to the side of the horizontal section facing away from the connecting segment, and the inner ends of the two clamps are integrally connected and set at an acute angle. The lower clamp rests on the top surface of the lower plate. The outer ends of the two clamps are set opposite each other and form a horn structure that gradually expands from the inside to the outside. The opposite sides of the two clamps are each recessed with a winding groove for the winding connecting wire to be wound on. The two clamps constitute the above-mentioned supporting structure.

[0012] The bottom surface of the tripwire post is recessed with a limiting groove extending in the vertical direction. The outer wall of the tripwire post is provided with a connecting groove that is connected to the limiting groove and extends to the outside of the bottom surface of the tripwire post. The upper end and the vertical part of the wiring segment are locked in the limiting groove, and the horizontal part extends outward from the connecting groove.

[0013] The lower plate has an integrally formed connecting post located outside the lower end of the wiring segment. The connecting post extends out of the bottom surface of the lower plate and has an extension groove that runs through it from top to bottom, allowing the lower end of the wiring segment to extend out of the bottom surface of the connecting post. The connecting post and the lower end of the wiring segment are integrally formed.

[0014] The wire harness block has a first block and a second block that are interlocked together. The first block has a wire pressing block protruding on one side facing the second block. The second block has a wire pressing groove for the wire pressing block to be embedded in. The bottom of the wire pressing block and the wire pressing groove are both provided with a wire passing groove for the connecting wire to pass through tightly and laterally through the wire harness block. The connecting wire between the wire harness block and the lower end of the connector segment, the wire harness block and the lower end of the connector segment are all integrally injection molded with the outer shell.

[0015] The upper mounting shell is a hollow cylindrical block that is set vertically. The insulating sleeve, winding coil, conductive terminal block and terminal mounting base are all located inside the upper mounting shell. The upper mounting shell has an open bottom surface for the rotor to be embedded in the groove, and the inner side wall of the insulating sleeve falls within the inner groove wall range of the groove. The outer side wall of the upper mounting shell and the outer side wall of the lower mounting shell are smoothly transitioned. The inner side wall of the lower mounting shell and the outer side wall of the lower end cover are provided with a mounting structure that allows the upper end of the lower end cover to be embedded in the sealing groove.

[0016] The inner sidewall of the lower mounting shell is provided with a plurality of protrusions spaced apart along the circumferential direction of the lower mounting shell. The top surface of the lower end cover is provided with a sealing ring embedded in the sealing groove. The outer sidewall of the sealing ring is recessed at the position corresponding to the protrusion. The sealing ring, the protrusion and the sealing recess constitute the above-mentioned mounting structure, and the lower end cover is locked together with the lower mounting shell.

[0017] This novel waterproof brushless motor for pumps first connects the lower end of the conductive connector block to the wiring mounting base, extending the lower end of the conductive connector block beyond the bottom surface of the mounting base. Then, the upper end of the conductive connector block is inserted into the tripwire post, completing the connection between the conductive connector block, the mounting base, and the tripwire post. Next, the connecting wire is electrically connected to the lower end of the conductive connector block, and then the outer end of the connecting wire is tightly fitted to the wire harness block, completing the stator assembly. Finally, the assembled stator is placed into an injection mold and integrally injection molded with the outer shell. During the injection molding of the outer shell, the wire harness block, connecting wire, mounting base, and the upper end of the conductive connector block are all integrally injection molded with the outer shell, making the entire stator and outer shell a single unit. The stator body is assembled by first fitting the rotor onto the upper end of the shaft, then placing the rotor into the upper mounting housing. A lower end cover is then fitted onto the lower end of the shaft, with its upper end embedded in a sealing groove. Finally, the lower end cover is connected to the lower mounting housing, completing the motor assembly. Compared to existing technologies, the integrated injection-molded structure of the stator and housing, due to the isolation provided by the injection molding material, prevents moisture from entering the stator through the wiring harness block. This effectively prevents water from entering the motor through the gap between the wiring harness block and the housing, ensuring the motor remains waterproof even when submerged in water, resulting in superior waterproofing. Furthermore, both the upper and lower end covers are sealed to the stator body, making it difficult for water to enter the motor, thus improving its performance in water and extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the present invention, omitting the outer shell and connecting wires.

[0020] Figure 3 This is a structural schematic diagram of the stator without wiring mounting base and wire harness block of this utility model.

[0021] Figure 4 This is a schematic diagram of the wiring mounting base of this utility model.

[0022] Figure 5 This is a schematic diagram of the conductive terminal block of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the wire harness block of this utility model.

[0024] Figure 7 This is a schematic diagram of the stator body of this utility model.

[0025] Figure 8 This is a schematic diagram of the structure of the lower end cover of this utility model.

[0026] Figure 9 This is a schematic diagram of the structure of this utility model without the outer shell. Detailed Implementation

[0027] To further explain the technical solution of this utility model, a detailed description is provided below in conjunction with the accompanying drawings.

[0028] Waterproof brushless motors for pumps, such as Figures 1-9 As shown, the device includes a housing 1 and a rotor 11, a stator, and a shaft 12 located within the housing 1. The rotor 11 has a circular structure, extending from the inside to the outside along the radius of the rotor. The stator is fixed inside the housing 1 and sleeved on the outside of the rotor 11. The shaft 12 is rotatably disposed within the housing 1 and is fixedly connected to the rotor 12. One end of the shaft 12 extends out of the housing 1, and the end of the shaft 12 extending out of the housing 1 is the lower end. A lower end cover 13 is sealed and installed on the lower end of the housing 1. The lower end of the shaft 12 extends out of the lower end cover 13 and is sealed and fitted with the lower end cover 13. The upper end of the housing 1... The upper end cover 14 is sealed and installed on the upper end. The stator has an insulating sleeve, a winding coil and a connector. Several spaced and distributed tripwire posts 15 extend integrally from the lower end face of the insulating sleeve. The winding coil is connected to the winding connecting wire, which is wound on the tripwire posts 15. The winding connecting wire is electrically connected to the connector. The sealing installation method of the lower end cover 13 and the upper end cover 14 with the outer shell, the specific structure and working principle of the insulating sleeve and the winding coil, and the specific structure of the rotor and the way it cooperates with the stator to make the shaft rotate are known technologies and will not be described in detail here.

[0029] The improvement of this invention is that the connector has a conductive terminal block 2, a terminal mounting base 3, and a wire harness block 4. The terminal mounting base 3 is an arc-shaped block extending circumferentially along the stator, and the arc-shaped block is fastened to a portion of the tripwire posts 15 in the insulating sleeve. Specifically, the terminal mounting base 3 has a lower plate 31 and a side plate 32. Both the lower plate 31 and the side plate 32 are outwardly convex arc plates. The side plate 32 is located outside the top surface of the lower plate 31, and the top surface of the lower plate 31 is provided with several partition plates 311 connected to the inner side of the side plate 32. A locking groove is formed between each pair of partition plates 311, the lower plate 31, and the side plate 32 for a tripwire post 15 to engage. In application, each tripwire post 15 is engaged in the locking groove one by one.

[0030] One side of the conductive connector 2 has a support structure that engages with the connector mounting base 3, and the winding connection wire is wound around the support structure. Specifically, the conductive connector 2 is a metal conductive block, and the support structure of the conductive connector 2 rests on the top surface of the lower plate 31. The conductive connector 2 has a connector segment 21, a connecting segment 22, and a winding segment 23, which are arranged sequentially. The connector segment 21 and the winding segment 23 are connected by the connecting segment 22. The connector segment 21 is a vertically arranged strip structure that extends vertically beyond the bottom surface of the lower plate 31. The connecting segment 22 has a vertically arranged horizontal part 221 and a vertical part 222, with the vertical part 222 standing upright. On the upper side of the connecting segment 21, the horizontal part 221 is located on the lower outer side of the vertical part 222. The winding segment 23 is located on the side of the horizontal part 221 facing away from the connecting segment 21. The winding connecting wire is wound on the winding segment 23. That is, the winding segment 23 has two clamps. The two clamps are arranged opposite each other. The upper clamp is connected to the side of the horizontal part 221 facing away from the connecting segment 21. The inner ends of the two clamps are integrally connected and set at an acute angle. The lower clamp is supported on the top surface of the lower plate 31. The outer ends of the two clamps are set opposite each other and form a horn structure that gradually expands from the inside to the outside. The opposite sides of the two clamps are both recessed with winding grooves for the winding connecting wire to be wound on. The two clamps constitute the above-mentioned support structure. In application, the two clamps are set at an angle to each other. When the winding connecting wire is wound on the clamps, the two clamps are pressed against each other. When the winding connecting wire is completed, the two clamps are released and the two clamps can expand in opposite directions, so that the winding connecting wire can be tightly wound on the winding segment 23; and the winding groove can also make the winding connecting wire wound accordingly.

[0031] The upper end of the conductive connector 2 is inserted into the tripwire post 15. Specifically, the bottom surface of the tripwire post 15 is recessed with a limiting groove 100 extending in the vertical direction. The outer wall of the tripwire post 15 has a connecting groove 200 that communicates with the limiting groove 100 and extends to the outside of the top surface of the tripwire post 15. The upper end of the connector segment 21 and the vertical part 222 are engaged in the limiting groove 100. The horizontal part 221 extends outward from the connecting groove 200, that is, the inner side of the vertical part 222 is recessed with a positioning groove. The inner wall of the limiting groove 100 is provided with a positioning block that is embedded in the positioning groove at the position corresponding to the positioning groove. In application, the winding connecting wire is wound on the winding groove, and then the upper end of the connector segment 21 and the vertical part 222 are inserted into the limiting groove 100. When the positioning block falls into the positioning groove, the conductive connector 2 is inserted into place.

[0032] The lower end of the conductive connector 2 is tightly fitted downwards through the connector mounting base 3. A connecting wire (not shown in the figure) is installed on the lower end of the conductive connector 2. Specifically, the lower end of the connector segment 21 extends out of the bottom surface of the lower plate 31 and connects to the connecting wire. That is, the lower end of the connector segment 21 has a through-hole 300. The connecting wire passes through the through-hole 300 and is electrically connected to the lower end of the connector segment 21. The lower end of the connector segment 21 extends out of the bottom surface of the lower plate 31 and is integrally formed with the lower plate 31. That is, a connecting post 312 located outside the lower end of the connector segment 21 is integrally formed on the lower plate 31. The connecting post 312 extends beyond the bottom surface of the lower plate 31. The connecting post 312 has a through-groove that allows the lower end of the wiring segment 21 to extend beyond the bottom surface of the connecting post 312. The connecting post 211 and the lower end of the wiring segment 21 are integrally formed. Preferably, if a single-phase motor is being manufactured, three locking slots are provided, and the three tripwire posts are respectively locked into the locking slots. Three conductive wiring blocks 2 extend beyond the bottom surface of the lower plate 31, with the lower ends of the three conductive wiring blocks 2 connected to the neutral wire, live wire, and ground wire, respectively. Similarly, if a multi-phase motor is being manufactured, the number of conductive wiring blocks 2 can be adjusted as needed. In application, after the lower end of the wiring segment 21 is integrally formed with the connecting post 312, the conductive wiring block 2 is integrally connected with the wiring mounting base 3. Then, the upper end and vertical part 222 of the wiring segment 21 are correspondingly inserted into the limiting slot 100, thus connecting the conductive wiring block 2 and the wiring mounting base 3 to the tripwire post 15.

[0033] The wire harness block 4 is a waterproof block. The connecting wires fit tightly through the wire harness block 4. The wire harness block 4 and the outer shell 11 are integrally injection molded into the stator body 5. Specifically, the wire harness block 4 has a first block 41 and a second block 42 that are interlocked together. The first block 41 has a wire pressing block 411 protruding on the side facing the second block 42. The second block 42 has a wire pressing groove for the wire pressing block 411 to be embedded in. The bottom of the wire pressing block and the wire pressing groove are both provided with a wire passing groove 400 for the connecting wires to fit tightly through and pass through the wire harness block 4 laterally. The first block 41 has a groove outside the position of the wire pressing block 411. The second block 42 has a protruding post 421 extending into the groove at the position corresponding to the groove. The connecting wires between the wire harness block 4 and the lower end of the connector segment 21, the wire harness block 4, and the lower end of the connector segment 21 are all integrally injection molded with the outer shell 11. The integral injection molding method in this invention is a well-known technology to those skilled in the art and will not be described in detail here. In application, the outer end of the connecting wire is passed through the wire groove, and the first block 41 and the second block 42 are fastened together by the cooperation of the groove and the protrusion 421. Furthermore, since the lower end of the conductive connector 2, the connecting wire, the wire harness block 4 and the outer shell are integrally injection molded, the injection molding material integrally injection molded with the outer shell fills the internal space of the outer shell. Due to the isolation of the injection molding material, water cannot enter from the wire harness block, so the conductive connector 2 has a good waterproof effect. At the same time, the connecting post 312 is integrally molded with the conductive connector 2, which can enhance the waterproof effect of the conductive connector 2.

[0034] The stator body 5 has an integrally injection-molded upper mounting shell 51 and a lower mounting shell 52. The lower mounting shell 52 is located below the upper mounting shell 51, and both the upper mounting shell 51 and the lower mounting shell 52 are hollow structures that are interconnected. The stator is located inside the upper mounting shell 51 and is sleeved on the rotor. The stator's wire harness block 4 is located on the lower end of the lower mounting shell 52. The lower end of the stator's conductive terminal block 2 extends downward into the lower mounting shell 52 and is positioned opposite to the wire harness block 4. The inner diameter of the upper mounting shell 51 is smaller than the inner diameter of the lower mounting shell 52, and a sealing groove is formed between the inner wall of the upper mounting shell 51 and the inner wall of the lower mounting shell 52. The lower end cover... The upper end of 13 is sealed and embedded in the sealing groove and connected to the lower mounting shell 52; specifically, the upper mounting shell 51 is a hollow cylindrical block with an open bottom, and the lower mounting shell is a hollow structure that runs through the top and bottom. The insulating sleeve, winding coil, conductive terminal block 2 and terminal mounting seat 3 are all located inside the upper mounting shell 51. The upper mounting shell 51 has an embedding groove with an open bottom for the rotor to be embedded in, and the inner sidewall of the insulating sleeve falls within the inner groove wall range of the embedding groove. The bottom of the embedding groove has an extension opening 500 for the upper end cover 14 to extend upward beyond the top surface of the outer shell 1 and for the upper end cover 14 to be sealed and installed with the upper mounting shell. The upper end cover 14 is... The bottom surface is open and hollow. The lower outer wall of the upper end cover 14 is provided with a sealing ring 141 that fits tightly against the inner top surface of the upper mounting shell 51. The outer wall of the upper mounting shell 51 and the outer wall of the lower mounting shell 52 are smoothly transitioned. The lower end cover 13 is sealed and fitted onto the lower end of the rotating shaft 12 and partially embedded in the sealing groove. That is, the inner wall of the lower mounting shell 52 and the outer wall of the lower end cover are provided with an installation structure that allows the upper end of the lower end cover to be embedded in the sealing groove. That is, the inner wall of the lower mounting shell 52 is provided with a plurality of protrusions 521 spaced apart along the circumferential direction of the lower mounting shell 52. The top surface of the lower end cover 13 is provided with an upward protrusion extending into the sealing groove. The sealing ring 131 in the groove has a sealing recess 600 recessed on its outer wall corresponding to the position of the protrusion 521. The sealing ring, the protrusion 521 and the sealing recess constitute the above-mentioned mounting structure. Preferably, the lower end of the stator's conductive terminal block 2 extends downward into the lower mounting shell 52 and falls into the protrusion 521. That is, when there are three conductive terminal blocks 2, the lower end of the three conductive terminal blocks 2 extends into the three protrusions 521. In this way, during processing, the three protrusions 521 have space to accommodate the lower end of the stator's conductive terminal block 2, and can also be matched with the sealing recess. There is no need to inject a large area, saving injection molding material.

[0035] The lower end cover 13 is locked together with the lower mounting shell 52. Specifically, the outer side wall of the lower mounting shell 52 is provided with four upper lugs 522 that are evenly spaced along the circumferential direction of the lower mounting shell 52. The outer side wall of the lower end cover 13 is provided with a lower lug 132 at the position corresponding to the upper lugs 522. Both the upper lugs 522 and the lower lugs 132 are provided with locking holes that are vertically through and vertically opposite to each other. The locking bolt passes through the two locking holes to lock the lower end cover 13 and the lower mounting shell 52 together. In application, the rotor 11 is fitted onto the rotating shaft 12, the upper end of the upper cover 14 is inserted into the protrusion 500, and the rotor 11 is placed in the mounting groove. The lower cover 13 is fitted onto the lower end of the rotating shaft 12, and the sealing ring 131 on the lower cover 13 is inserted into the sealing groove, with the protrusion corresponding to the sealing recess. Finally, the lower cover 13 and the lower mounting shell 52 are locked together. The sealing ring is embedded in the sealing groove, which enables a sealed connection between the lower cover 13 and the lower mounting shell 52.

[0036] This novel waterproof brushless motor for pumps first connects the lower end of the wiring segment 21 to the wiring mounting base 3 via the connecting post 312, ensuring the lower end of the wiring segment 21 extends beyond the bottom surface of the lower plate. Then, the upper end of the wiring segment 21 and the vertical part 222 are inserted into the limiting groove 100 of the tripwire post 15, simultaneously engaging the tripwire post 15 within the engaging groove. This completes the connection between the conductive wiring block 2, the wiring mounting base 3, and the tripwire post 15. Next, the connecting wire is electrically connected to the lower end of the wiring segment 21, and the outer end of the connecting wire is tightly fitted to the wire harness block 4, completing the stator assembly. Finally, the assembled stator is placed into an injection mold and integrally injection molded with the outer shell. During the injection molding of the outer shell, the wire harness block 4, the connecting wire, the wiring mounting base 3, and the upper ends of the conductive wiring block 2 are all integrally injection molded with the outer shell. The stator and housing are integrally molded into a single stator body. The rotor 11 is then fitted onto the upper end of the shaft 12, which is placed inside the upper mounting shell 51. A lower end cover 13 is then fitted onto the lower end of the shaft 12, with its upper end embedded in a sealing groove. Finally, the lower end cover and lower mounting shell are locked together, completing the motor assembly. Compared to existing technologies, the integral injection-molded structure of the stator and housing, due to the isolation provided by the injection molding material, prevents moisture from entering the stator through the wire harness block 4. This effectively prevents water from entering the motor through the gap between the wire harness block 4 and the housing, ensuring waterproofing even when submerged in water. Furthermore, the upper and lower end covers are sealed to the stator body, making it difficult for water to enter the motor, resulting in better performance and a longer service life when used underwater.

[0037] The product form of this utility model is not limited to the illustrations and embodiments in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of this utility model.

Claims

1. A waterproof brushless motor for pumps, comprising a housing, a rotor, a shaft, a stator, and end covers. The end covers have an upper end cover and a lower end cover respectively sealed and installed on the upper and lower ends of the housing. The stator is fixed inside the housing and sleeved on the outside of the rotor. The shaft is rotatably disposed within the housing and fixedly connected to the rotor. One end of the shaft extends into the lower end cover and is sealed and fitted with the lower end cover. The end of the shaft extending out of the housing is considered the lower end. The stator has an insulating sleeve, winding coils, and connectors. Several spaced, circumferentially distributed tripwire posts extend integrally from the lower end face of the insulating sleeve. Winding connecting wires are connected to the winding coils and wound around the tripwire posts. The winding connecting wires are electrically connected to the connectors. The characteristic feature is that: The connector has a conductive terminal block, a terminal mounting base, and a wire harness block. The terminal mounting base is an arc-shaped block extending circumferentially along the stator. The arc-shaped block is tightly fitted with a portion of the trip posts in the insulating sleeve. The upper end of the conductive terminal block is inserted into the trip posts, and one side of the conductive terminal block has a support structure that engages with the terminal mounting base. The winding connecting wire is wound around the support structure. The lower end of the conductive terminal block passes through the terminal mounting base downwards. A connecting wire is installed on the lower end of the conductive terminal block. The wire harness block is a waterproof block. The connecting wire passes through the wire harness block, and the wire harness block and the outer shell are integrally injection molded into the stator body. The stator body has an integrally injection-molded upper mounting shell and a lower mounting shell. The lower mounting shell is located below the upper mounting shell, and both the upper and lower mounting shells are hollow structures that are interconnected. The stator is located inside the upper mounting shell and is sleeved on the rotor. The stator's wire harness block is located on the lower mounting shell. The lower end of the stator's conductive terminal block extends downward into the lower mounting shell and is positioned opposite to the wire harness block. The inner diameter of the upper mounting shell is smaller than the inner diameter of the lower mounting shell, and a sealing groove is formed between the inner sidewall of the upper mounting shell and the inner sidewall of the lower mounting shell. The upper end of the lower end cover is sealed and embedded in the sealing groove and connected to the lower mounting shell.

2. The waterproof brushless motor for pumps according to claim 1, characterized in that: The wiring mounting base has a lower plate and a side plate. Both the lower plate and the side plate are convex arc plates that bulge outward. The side plate is located outside the top surface of the lower plate, and the top surface of the lower plate is provided with several partition plates that connect to the inner side of the side plate. A locking groove is formed between each pair of partition plates, the lower plate, and the side plate for a tripping post to engage. The top holding structure of the conductive wiring block is held on the top surface of the lower plate, and the lower end of the conductive wiring block extends out of the lower plate and is integrally formed with the lower plate.

3. The waterproof brushless motor for pumps according to claim 2, characterized in that: The conductive terminal block is a metal conductive block. The conductive terminal block has a terminal segment, a connecting segment, and a winding segment. The terminal segment, connecting segment, and winding segment are arranged in sequence, and the terminal segment and the winding segment are connected by the connecting segment. The terminal segment has a vertically arranged strip structure. The lower end of the terminal segment extends out of the bottom surface of the lower plate and is connected to the connecting wire. The connecting segment has a vertically arranged horizontal part and a vertical part. The vertical part is located on the upper side of the terminal segment, and the horizontal part is located on the lower outer side of the vertical part. The winding segment is located on the side of the horizontal part facing away from the terminal segment, and the winding connecting wire is wound on the winding segment.

4. The waterproof brushless motor for pumps according to claim 3, characterized in that: The winding segment has two clamps, which are arranged vertically opposite each other. The upper clamp is connected to the side of the horizontal section facing away from the connecting segment, and the inner ends of the two clamps are integrally connected and set at an acute angle. The lower clamp rests on the top surface of the lower plate. The outer ends of the two clamps are set opposite each other and form a horn structure that gradually expands from the inside to the outside. The opposite sides of the two clamps are each recessed with a winding groove for the winding connecting wire to be wound on. The two clamps constitute the above-mentioned supporting structure.

5. The waterproof brushless motor for pumps according to claim 3, characterized in that: The bottom surface of the tripwire post is recessed with a limiting groove extending in the vertical direction. The outer wall of the tripwire post is provided with a connecting groove that is connected to the limiting groove and extends to the outside of the bottom surface of the tripwire post. The upper end and the vertical part of the wiring segment are locked in the limiting groove, and the horizontal part extends outward from the connecting groove.

6. The waterproof brushless motor for pumps according to claim 3, characterized in that: The lower plate has an integrally formed connecting post located outside the lower end of the wiring segment. The connecting post extends out of the bottom surface of the lower plate and has an extension groove that runs through it from top to bottom, allowing the lower end of the wiring segment to extend out of the bottom surface of the connecting post. The connecting post and the lower end of the wiring segment are integrally formed.

7. The waterproof brushless motor for pumps according to claim 3, characterized in that: The wire harness block has a first block and a second block that are interlocked together. The first block has a wire pressing block protruding on one side facing the second block. The second block has a wire pressing groove for the wire pressing block to be embedded in. The bottom of the wire pressing block and the wire pressing groove are both provided with a wire passing groove for the connecting wire to pass through tightly and laterally through the wire harness block. The connecting wire between the wire harness block and the lower end of the connector segment, the wire harness block and the lower end of the connector segment are all integrally injection molded with the outer shell.

8. The waterproof brushless motor for pumps according to claim 1, characterized in that: The upper mounting shell is a hollow cylindrical block that is set vertically. The insulating sleeve, winding coil, conductive terminal block and terminal mounting base are all located inside the upper mounting shell. The upper mounting shell has an open bottom surface for the rotor to be embedded in the groove, and the inner side wall of the insulating sleeve falls within the inner groove wall range of the groove. The outer side wall of the upper mounting shell and the outer side wall of the lower mounting shell are smoothly transitioned. The inner side wall of the lower mounting shell and the outer side wall of the lower end cover are provided with a mounting structure that allows the upper end of the lower end cover to be embedded in the sealing groove.

9. The waterproof brushless motor for pumps according to claim 8, characterized in that: The inner sidewall of the lower mounting shell is provided with a plurality of protrusions spaced apart along the circumferential direction of the lower mounting shell. The top surface of the lower end cover is provided with a sealing ring embedded in the sealing groove. The outer sidewall of the sealing ring is recessed at the position corresponding to the protrusion. The sealing ring, the protrusion and the sealing recess constitute the above-mentioned mounting structure, and the lower end cover is locked together with the lower mounting shell.

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