A waterproof junction box and motor

Abstract

The utility model discloses a waterproof junction box and motor belong to the technical field of motor production, including box body, the side of box body is equipped with a plurality of installation passageway, the side of box body is equipped with installation passageway is installation side, and the installation side of box body is installed on the motor with motor contact, and box body is all provided with first wiring sleeve through each installation passageway, and power cable is arranged in first wiring sleeve. When assembling the motor, the position of the power cable is adjusted by sliding the wire sleeve in the first wiring sleeve, which facilitates the electrical connection of the power cable and the stator coil of the motor. The installation side of the box body in the slot hole is covered with epoxy resin, which is the preferred gelling material. The space in the first wiring sleeve is filled with solidified epoxy resin, which fixes the wire sleeve and the first wiring sleeve. At the same time, the installation passageway is sealed by the epoxy resin, and the power cable is also sealed and fixed in the first wiring sleeve.

Description

Technical Field

[0001] This utility model belongs to the technical field of motor manufacturing, and in particular relates to a waterproof junction box and a motor. Background Technology

[0002] Coal mine motors are a key component of coal mining equipment, and their quality directly affects the reliable operation of the equipment. The junction box, as an important part of the motor, is made by welding multiple steel plates together and then welding them to the base or end cover, finally assembling and installing a sealed wire guide device and temperature measuring wire guide sleeve. During use, space constraints in coal mining equipment affect the size of the junction box; sometimes the junction box is too large, often making installation impossible in tight spaces. Sometimes, to save space, the lead wires lack guidance, making the bends easily damaged by impacts. Furthermore, in underground coal mines, due to humidity or spraying, water can easily enter the junction box, leading to poor sealing of the lead wires, low insulation, and machine shutdown. A reliable motor junction box is crucial for both reliable motor operation and user safety. Therefore, solving the problems of limited space in motor junction boxes and unreliable sealing of lead wires is an urgent issue to be addressed. Utility Model Content

[0003] The purpose of this utility model is to provide a waterproof junction box and motor, which has the advantages of convenient installation and reliable sealing, and effectively solves the problems of inconvenient wiring and unreliable sealing in the prior art.

[0004] The present invention adopts the following technical solution: a waterproof junction box, including a box body, a plurality of installation channels are provided on one side of the box body, and a hollow sliding wiring structure is provided in the installation channel and slidably connected to the box body. The output end of the power wire is electrically connected to the stator coil through the inner cavity of the sliding wiring structure; the installation channel is sealed and fixed by insulating material.

[0005] Furthermore, the side of the housing with the installation channel is the installation side. The installation side of the housing is in contact with the motor and installed on the motor. The hollow sliding wiring structure includes a first wiring sleeve fixedly installed in each installation channel of the housing. Each first wiring sleeve has a wire guide sleeve that slides along the length of the first wiring sleeve. The power wires are passed through and fixed in the wire guide sleeves. One end of each power wire extends to the outside of the installation side of the housing and enters the motor to be electrically connected to the stator coil of the motor. The other end of each power wire is gathered into a bundle and passes through a wire hole opened on the bottom surface of the housing and is connected to the power supply. Furthermore, the motor housing has slots corresponding to the box body, with the mounting side of the box body located inside the slots. Epoxy resin is filled into the slots to cover the mounting side of the box body located inside the slots, and the epoxy resin solidifies to form an insulating material.

[0006] Furthermore, a first adhesive sealing block is fixedly installed between the power wire and the wire guide sleeve.

[0007] Furthermore, a threaded post is fixedly provided on one side of the first terminal sleeve, and the threaded post is threadedly connected to the box body through an installation channel; a through hole with an inner diameter larger than the outer diameter of the power wire is opened in the threaded post.

[0008] Furthermore, an inlay groove is provided at the joint between the first wiring sleeve and the threaded post, and a first sealing ring is provided in the inlay groove.

[0009] Furthermore, the end of the wire guide sleeve away from the threaded post protrudes from the outer surface of the first wire guide sleeve and has an annular groove, in which an external retaining spring is provided.

[0010] Furthermore, an auxiliary hole is provided on the mounting side of the box, and a second wiring sleeve is threaded into the auxiliary hole. Several control lines are fixedly installed in the second wiring sleeve. The control lines protruding from the mounting side of the box enter the motor and are electrically connected to the control circuit inside the motor. The control lines inside the box are electrically connected to the control components.

[0011] Furthermore, a second sealing block is fixedly installed inside the second wiring sleeve, and the control line is fixedly embedded in the second sealing block.

[0012] An electric motor includes a junction box as described in any one of the preceding claims, and further includes a housing, a stator coil fixedly disposed within the housing, a rotor rotatably connected within the stator coil within the housing, and the mounting side of the housing being mounted on the motor in contact with the motor.

[0013] I. This utility model, through the setting of a box and a hollow sliding wiring structure, allows for easy connection of the power wire to the motor during assembly. When the motor is being assembled, the power wire needs to be extended to the outside of the box for electrical connection. The hollow sliding wiring structure allows for easy adjustment of the power wire's position, facilitating electrical connection between the power wire and the motor's stator coil. The power wire is pre-fixed within the hollow sliding wiring structure, which is then placed inside the junction box, facilitating electrical connection between the power wire and the motor. The sliding nature of the hollow wiring structure also makes connection easier. A cementitious material is poured into the installation channel and solidifies to form an insulating material, thus fixing and sealing the wire sleeve to the first junction sleeve.

[0014] II. By setting a threaded post, the first terminal sleeve is threadedly connected to the installation channel through the threaded post during assembly, thereby fixing the first terminal sleeve to the box body. At the same time, a through hole with an inner diameter larger than the outer diameter of the power wire is opened in the threaded post, which facilitates the epoxy resin to enter the space between the threaded post and the power wire, and then enter the space of the first terminal sleeve, thus achieving the purpose of convenient epoxy resin injection. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention installed on a motor; Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the box lid in this utility model; Figure 4 This is a schematic diagram of the internal three-dimensional structure of the box in this utility model; Figure 5 This is a three-dimensional structural diagram of the first connector sleeve in this utility model; Figure 6 This is a schematic diagram of the internal three-dimensional structure of the first connector sleeve in this utility model; Figure 7 This is a three-dimensional structural diagram of the interior of the first connector sleeve and the threaded column in this utility model; Figure 8 This is a schematic diagram of the internal three-dimensional structure of the wire guide sleeve in this utility model; Figure 9 This is a schematic diagram of the internal three-dimensional structure of the motor in this utility model; Figure 10 In this utility model Figure 9 Enlarged schematic diagram of the structure at point A in the diagram; Figure 11 This is a three-dimensional structural diagram of the second connector sleeve in this utility model; Figure 12 This is a schematic diagram of the internal three-dimensional structure of the second connector sleeve in this utility model.

[0016] In the diagram, 1. Box body; 2. Installation channel; 3. Motor; 4. First terminal sleeve; 5. Power wire; 6. Wire hole; 7. Wire pass sleeve; 8. Slot; 9. Stator coil; 10. First sealing block; 11. Threaded post; 12. Through hole; 13. Embedding groove; 14. First sealing ring; 15. Annular groove; 16. External snap ring; 17. Auxiliary hole; 18. Second terminal sleeve; 19. Control wire; 20. Second sealing block; 21. Second sealing ring; 22. Annular groove; 23. Slope; 24. Box cover. Detailed Implementation

[0017] Please see Figure 1-12 The present invention will now be described in detail with reference to the accompanying drawings and embodiments: The waterproof junction box of this utility model includes a box body 1. A plurality of installation channels 2 are provided on one side of the box body 1. A hollow sliding wiring structure is provided in the installation channel 2 and is slidably connected to the box body 1. The output end of the power wire 5 is electrically connected to the stator coil 9 through the inner cavity of the sliding wiring structure. The installation channel 2 is sealed and fixed by insulating material.

[0018] In this embodiment, the side of the housing 1 with the installation channel 2 is the installation side. The installation side of the housing 1 is in contact with the motor 3 and installed on the motor 3. The hollow sliding wiring structure includes a first wiring sleeve 4 fixedly installed in each installation channel 2 of the housing 1. Each first wiring sleeve 4 has a wire guide sleeve 7 slidably installed along the length of the first wiring sleeve 4. The power wire 5 is passed through and fixed in the wire guide sleeve 7. One end of each power wire 5 extends to the outside of the installation side of the housing 1 and enters the motor 3 to be electrically connected to the stator coil 9 of the motor 3. The other end of each power wire 5 is gathered into a bundle and passes through the wire hole 6 opened on the bottom surface of the housing 1 and is connected to the power supply. During normal use, the power supply provides power to the motor 3 through the power wire 5, causing the motor 3 to run. When assembling the motor 3, it is necessary to... One end of the power wire 5 extends to the outside of the mounting side of the box 1 and is electrically connected to the motor 3. At this time, the position of the power wire 5 can be adjusted by sliding the wire guide sleeve 7 in the first terminal sleeve 4 to facilitate the electrical connection between the power wire 5 and the stator coil 9 of the motor 3. After the power wire 5 and the motor 3 are electrically connected, a slot 8 is opened at the position of the outer shell of the motor 3 corresponding to the box 1. The mounting side of the box 1 is located in the slot 8. The slot 8 is filled with a cementing material, preferably epoxy resin, to cover the mounting side of the box 1 located in the slot 8. The epoxy resin solidifies to form an insulating material. The space inside the first terminal sleeve 4 is filled with solidified epoxy resin, which fixes the wire guide sleeve 7 to the first terminal sleeve 4. At the same time, the epoxy resin seals the mounting channel 2, and the power wire 5 is also sealed and fixed in the first terminal sleeve 4.

[0019] To achieve a sealed and fixed connection between the power cable 5 and the cable sleeve 7, in Example 1, A first sealing block 10 is fixedly installed between the power wire 5 and the wire sleeve 7. The first sealing block 10 is made of epoxy resin and has the functions of sealing, waterproofing and moisture-proofing. The first sealing block 10 also includes other alternatives to epoxy resin, such as high-temperature resistant dicyclopentadiene epoxy resin and trifunctional high-temperature resistant epoxy resin, fast-curing polyurethane modified epoxy resin, and corrosion-resistant organosilicon modified epoxy resin.

[0020] To achieve the purpose of fixing the first wiring sleeve 4 to the box body 1, in Embodiment 2... A threaded post 11 is fixedly provided on one side of the first terminal sleeve 4. The threaded post 11 is threadedly connected to the box body 1 through the installation channel 2, so that the first terminal sleeve 4 is fixedly installed with the box body 1 through the cooperation of the threaded post 11 and the installation channel 2. A through hole 12 with an inner diameter larger than the outer diameter of the power wire 5 is opened in the threaded post 11. When epoxy resin is injected, the epoxy resin enters the space between the threaded post 11 and the power wire 5, and then enters the space of the first terminal sleeve 4. The epoxy resin solidifies to fix the power wire 5 in the threaded post 11 and fix the wire sleeve 7 in the first terminal sleeve 4.

[0021] To achieve a seal between the first wiring sleeve 4 and the threaded post 11 and the housing 1, in Embodiment 3... An inlay groove 13 is provided at the joint between the first connector sleeve 4 and the threaded post 11. A first sealing ring 14 is provided in the inlay groove 13. After the threaded post 11 is threadedly connected to the installation channel 2 of the box body 1, the first connector sleeve 4 is pressed tightly against the inner wall of the box body 1. At the same time, the first sealing ring 14 is squeezed between the first connector sleeve 4 and the inner wall of the box body 1 to achieve the sealing function.

[0022] Example 4, The end of the wire guide sleeve 7 away from the threaded post 11 protrudes from the outer surface of the first terminal sleeve 4 and has an annular groove 15. An external retaining spring 16 is installed in the annular groove 15. After the power wire 5 is wired to the motor 3 to achieve electrical connection, the external retaining spring 16 is installed in the annular groove 15, and then epoxy resin is injected into one end of the threaded post 11 to finally achieve the sealing and fixing of the wire guide sleeve 7 and the first terminal sleeve 4. When water enters the box 1 during use, the epoxy resin seal at the wire guide sleeve 7 prevents water from entering the interior of the motor 3, and the first sealing ring 14 at the first terminal sleeve 4 seals against water entering the interior of the motor 3. The external retaining spring 16 can also be replaced by a screw ring, as long as it can achieve the purpose of preventing the wire guide sleeve 7 from moving further downward.

[0023] In this embodiment, an auxiliary hole 17 is provided on the mounting side of the housing 1. A second wiring sleeve 18 is threaded into the auxiliary hole 17. Several control lines 19 are fixedly installed in the second wiring sleeve 18. The control lines 19 protruding from the mounting side of the housing 1 enter the motor 3 and are electrically connected to the control circuit inside the motor 3. The control lines 19 inside the housing 1 are electrically connected to the control components to achieve the purpose of controlling the start and stop of the motor 3.

[0024] In this embodiment, a second sealing block 20 is fixedly disposed inside the second wiring sleeve 18. The second sealing block 20 is made of epoxy resin. The control line 19 is fixedly embedded in the second sealing block 20 to achieve a seal between the control line 19 and the second wiring sleeve 18. The second sealing block 20 is made of the same material as the first sealing block 10 and has the same function, both having the functions of sealing, waterproofing and moisture-proofing.

[0025] In this embodiment, the outer surface of the second connector sleeve 18 is provided with an annular step, and an annular groove 22 is provided at the annular step of the second connector sleeve 18. A second sealing ring 21 is provided in the annular groove 22. After the second connector sleeve 18 is assembled with the box body 1 by thread connection, the annular step of the second connector sleeve 18 abuts against the inner side wall of the box body 1, pressing the second sealing ring 21 tightly, thereby achieving a seal between the second connector sleeve 18 and the box body 1.

[0026] In this embodiment, the upper surface of the box body 1 is open, and the box cover 24 is fixed to the box body 1 to achieve the purpose of sealing the open, which facilitates maintenance and assembly.

[0027] In this embodiment, a sealing groove is provided on the upper end face of the box body 1, and a second sealing ring 21 is provided in the sealing groove. When the box cover 24 is fixed to the box body 1, the second sealing ring 21 is used to seal the box cover 24 and the box body 1.

[0028] An electric motor includes a housing, a stator coil 9 fixedly disposed inside the housing, a rotor located inside the stator coil 9 rotatably connected to the housing, and a mounting side of a housing 1 is mounted on the motor 3 in contact with the housing of the motor 3.

[0029] In this embodiment, the mounting side of the box 1 is provided with a slope 23. When the box 1 and the motor 3 are installed and fixed, welding can be performed at the slope 23 to facilitate the entry of the welding molten iron solution between the slope 23 and the outer surface of the motor 3, thus facilitating welding.

[0030] In this embodiment, the housing 1 and the outer surface of the motor 3 can also be fixed by bolts.

[0031] The working principle of this utility model is as follows: When the motor 3 is in normal use, the cover 24 and the second sealing ring 21 can prevent external water from entering the box 1, thus achieving a waterproof function. Due to various reasons, when external water enters the box 1, the first wiring sleeve 4 and the first sealing ring 14 can prevent water from entering the motor 3 through the gap between the first wiring sleeve 4 and the box 1. The wire pass sleeve 7 and the epoxy resin can prevent water from entering the motor 3 from the wire pass sleeve 7, thus avoiding the risk of water entering the motor 3 and corroding the winding insulation, causing low insulation or damage and burnout.

Claims

1. A waterproof junction box, characterized in that: Includes a box body (1), and a number of installation channels (2) are provided on one side of the box body (1). A hollow sliding wiring structure is provided in the installation channel (2) and is slidably connected to the box body (1). The output end of the power wire (5) is electrically connected to the stator coil (9) through the inner cavity of the sliding wiring structure. The installation channel (2) is sealed and fixed by insulating material.

2. The waterproof junction box according to claim 1, characterized in that: The side of the box (1) with the installation channel (2) is the installation side. The installation side of the box (1) is in contact with the motor (3) and installed on the motor (3). The hollow sliding wiring structure includes a first wiring sleeve (4) fixedly installed in each installation channel (2) of the box (1). A wire sleeve (7) is slidably installed in each first wiring sleeve (4) along the length direction of the first wiring sleeve (4). The power wire (5) is fixed inside the wire sleeve (7). One end of each power wire (5) extends to the outside of the installation side of the box (1) and enters the motor (3) and is electrically connected to the stator coil (9) of the motor (3). The other end of each power wire (5) is gathered into a bundle and passes through the wire hole (6) opened on the bottom surface of the box (1) and is connected to the power supply.

3. The waterproof junction box according to claim 2, characterized in that: The outer casing of the motor (3) is provided with a slot (8) at the position corresponding to the box (1). The mounting side of the box (1) is located in the slot (8). Epoxy resin is filled in the slot (8) to cover the mounting side of the box (1) located in the slot (8). The epoxy resin solidifies to form an insulating material.

4. The waterproof junction box according to claim 2, characterized in that: A first sealing block (10) is fixedly installed between the power wire (5) and the wire sleeve (7).

5. The waterproof junction box according to claim 2, characterized in that: A threaded post (11) is fixedly provided on one side of the first terminal sleeve (4). The threaded post (11) is threadedly connected to the box body (1) through the installation channel (2). A through hole (12) with an inner diameter larger than the outer diameter of the power wire (5) is opened in the threaded post (11).

6. The waterproof junction box according to claim 5, characterized in that: An inlay groove (13) is provided at the junction of the first wiring sleeve (4) and the threaded post (11), and a first sealing ring (14) is provided in the inlay groove (13).

7. The waterproof junction box according to claim 5, characterized in that: The end of the wire sleeve (7) away from the threaded post (11) protrudes from the outer surface of the first wire sleeve (4) and has an annular groove (15), and an outer retaining spring (16) is provided in the annular groove (15).

8. The waterproof junction box according to claim 2, characterized in that: The mounting side of the box (1) is provided with an auxiliary hole (17), and a second wiring sleeve (18) is threaded into the auxiliary hole (17). Several control lines (19) are fixedly installed in the second wiring sleeve (18). The control lines (19) protruding from the mounting side of the box (1) enter the motor (3) and are electrically connected to the control circuit inside the motor (3). The control lines (19) inside the box (1) are electrically connected to the control components.

9. The waterproof junction box according to claim 8, characterized in that: The second wiring sleeve (18) is fixedly provided with a second sealing block (20), and the control line (19) is fixedly embedded in the second sealing block (20).

10. An electric motor, comprising the junction box as described in any one of claims 1-9, further comprising a housing, a stator coil (9) fixedly disposed within the housing, and a rotor rotatably connected within the stator coil (9) within the housing, characterized in that: The mounting side of the housing (1) is in contact with the motor (3) and mounted on the motor (3).

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