Three-phase asynchronous motor with cable protection device

Abstract

The utility model relates to the technical field of three-phase asynchronous motors, and particularly discloses a three-phase asynchronous motor with a cable protection device, which comprises a three-phase motor and a threading seat, the bottom of the three-phase motor is provided with an installation base, one side of the three-phase motor is provided with a fan and a fan shield, and the top of the three-phase motor is provided with a junction box. One side of the junction box is fixedly connected with a threading seat, one side of the threading seat is provided with an annular groove, the inner wall of the annular groove is fixedly provided with four mutually symmetrical fixing frames, the fixing frames are rotatably connected with a clamping mechanism, the annular groove is internally in threaded connection with a bolt, and one end, far away from the threading seat, of the bolt is movably connected with a protection mechanism. The clamping mechanism can gradually clamp the cable along with the rotation of the bolt, so that the cable is prevented from being loosened due to dragging or collision in the use process of the three-phase motor, the protection mechanism can also have dustproof and waterproof functions and the like, and the three-phase motor is convenient to disassemble and assemble and has an extension function.

Description

Technical Field

[0001] The utility model relates to the technical field of three - phase asynchronous motors, in particular to a three - phase asynchronous motor with a cable protection device. Background Technique

[0002] A three - phase asynchronous motor is a type of motor powered by simultaneously connecting to a 380V three - phase AC power supply. Since the rotor of the three - phase asynchronous motor rotates in the same direction as the stator rotating magnetic field but at a different speed, there is a speed difference, so it is called a three - phase asynchronous motor.

[0003] Most three - phase asynchronous motors are fixedly installed on mechanical equipment. The traditional method is to directly thread the cable into the junction box, complete the wiring, and then close the junction box. However, the existing three - phase asynchronous motors do not have a cable protection function, are easily collided by external objects, resulting in the risk of cable loosening or even falling off. At the same time, the cable is easily worn at the junction with the three - phase asynchronous motor, leading to cable damage and other problems. Therefore, a three - phase asynchronous motor with a cable protection device is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a three - phase asynchronous motor with a cable protection device is proposed.

[0005] In order to achieve the above - mentioned purpose, the utility model adopts the following technical solutions:

[0006] A three - phase asynchronous motor with a cable protection device includes a three - phase motor and a wire - threading base. An installation base is arranged at the bottom of the three - phase motor. A fan and a fan guard are installed on one side of the three - phase motor. A junction box is arranged at the top of the three - phase motor. One side of the junction box is fixedly connected to a wire - threading base. An annular groove is opened on one side of the wire - threading base. Four symmetrically arranged fixing frames are fixedly arranged on the inner wall of the annular groove. A clamping mechanism is rotatably connected to the fixing frames. A bolt is threadedly connected in the annular groove. One end of the bolt away from the wire - threading base is movably connected to a protection mechanism.

[0007] Preferably, a wire - threading hole is opened at the center of the wire - threading base. Four symmetrically arranged rectangular grooves are opened on the side wall of the annular groove. Each rectangular groove corresponds to a fixing frame respectively.

[0008] Preferably, the clamping mechanism includes a lever and a pressing wheel. The top of the fixing frame is rotatably connected to a lever. One end of the lever is located in the annular groove. The other end of the lever passes through the rectangular groove. A pulley is rotatably connected to one end of the lever. A pressing wheel is rotatably connected to the other end of the lever. Four symmetrically arranged tension springs are fixedly connected to the inner wall of the annular groove. The end of each tension spring is fixedly connected to the side wall of the lever respectively.

[0009] Preferably, a rubber film is fixedly connected to one side of the lever. The other side of the rubber film is fixedly connected to the adjacent side wall of the lever.

[0010] Preferably, a through hole is provided in the center of the bolt, the inner diameter of the through hole is the same as that of the wire threading hole, and two fixing blocks are symmetrically arranged at the top and bottom of the through hole.

[0011] Preferably, an external thread is provided on one side of the bolt, an internal thread is provided on the outer wall of the annular groove, and the external thread is adapted to the internal thread.

[0012] Preferably, the protection mechanism includes a rotating block and a corrugated pipe. The rotating block is of an annular structure. Rotating and matching grooves are symmetrically provided at the top and bottom of the rotating block. The size of the matching groove is adapted to the fixing block. One side of the rotating block is fixedly connected to the corrugated pipe, and the end of the corrugated pipe is fixedly connected to a connecting block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] By providing a clamping mechanism, when the clamping mechanism tightens the bolt after completing the wiring, the clamping mechanism can gradually clamp the cable as the bolt rotates, so as to prevent the cable from loosening due to being dragged or collided during the use of the three-phase motor, effectively ensuring the normal operation of the three-phase motor. And the clamping mechanism does not affect the insertion or extraction of the cable, is suitable for cables of different diameters, is convenient to use. When clamping the cable, the rubber film contacts the cable, which can seal the wire threading hole, reduce the entry of external dust and moisture into the junction box, and improve the service life of the electronic components in the junction box.

[0015] By providing a protection mechanism, the protection mechanism can be selectively installed according to the use requirements. The protection mechanism can be installed on the side wall of the bolt to provide external protection for the cable, preventing the cable from being worn due to being placed in an easily accessible position such as on the ground. If the installation position of the cable is not easily accessible, the protection mechanism can also play functions such as dust and water protection, and can be disassembled and assembled conveniently and has an extendable function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic diagram of the overall structure of a three-phase asynchronous motor with a cable protection device proposed by the present utility model;

[0017] Figure 2 FIG. is a schematic diagram of the mating state of the wire threading seat and the bolt of a three-phase asynchronous motor with a cable protection device proposed by the present utility model;

[0018] Figure 3 FIG. is a schematic diagram of the structure of the wire threading seat of a three-phase asynchronous motor with a cable protection device proposed by the present utility model;

[0019] Figure 4 FIG. is a schematic diagram of the back structure of the wire threading seat of a three-phase asynchronous motor with a cable protection device proposed by the present utility model;

[0020] Figure 5 Schematic structural diagram of a clamping mechanism of a three-phase asynchronous motor with a cable protection device proposed by the present utility model;

[0021] Figure 6 Schematic structural diagram of a bolt of a three-phase asynchronous motor with a cable protection device proposed by the present utility model;

[0022] Figure 7 Schematic structural diagram of a protection mechanism of a three-phase asynchronous motor with a cable protection device proposed by the present utility model.

[0023] In the figure: 1, three-phase motor; 2, junction box; 3, wire threading base; 31, wire threading hole; 4, annular groove; 41, rectangular groove; 5, internal thread; 6, fixing bracket; 7, clamping mechanism; 8, lever; 81, tension spring; 9, pressing wheel; 91, pulley; 10, rubber membrane; 11, bolt; 12, through hole; 13, protection mechanism; 14, fixing block; 15, rotating block; 16, mating groove; 17, bellows. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0025] Refer to Figure 1-7, A three-phase asynchronous motor with a cable protection device, including a three-phase motor 1 and a wire threading base 3. There is an installation base at the bottom of the three-phase motor 1, a fan and a fan guard are installed on one side of the three-phase motor 1, a junction box 2 is arranged at the top of the three-phase motor 1, a wire threading base 3 is fixedly connected to one side of the junction box 2, an annular groove 4 is opened on one side of the wire threading base 3, four mutually symmetrical fixing frames 6 are fixedly arranged on the inner wall of the annular groove 4, a clamping mechanism 7 is rotatably connected to the fixing frame 6, a bolt 11 is threadedly connected in the annular groove 4, and one end of the bolt 11 away from the wire threading base 3 is movably connected to a protection mechanism 13. According to the actual use situation, the three-phase motor 1 often has different installation postures. The installation base can fixedly install the three-phase motor 1 at the installation position to be installed. At this time, the installer wires the three-phase motor 1. Before wiring, the cable is first passed through the protection mechanism 13, the bolt 11 and the wire threading base 3 in sequence so that the cable finally penetrates into the junction box 2. The installer can then connect the cable to the wiring terminal in the junction box 2. Among them, when the bolt 11 is tightened after wiring is completed, the clamping mechanism 7 can gradually clamp the cable as the bolt 11 rotates, so as to prevent the cable from loosening due to being dragged or collided during the use of the three-phase motor 1, which can effectively ensure the normal operation of the three-phase motor 1. And the clamping mechanism 7 does not affect the penetration or extraction of the cable, is suitable for cables of different diameters and is convenient to use. The protection mechanism 13 can be selectively installed according to the use needs. The protection mechanism 13 can be installed on the side wall of the bolt 11 to provide external protection for the cable, preventing the cable from being worn due to being placed in an easily accessible position such as the ground. If the installation position of the cable is not easily accessible, the protection mechanism 13 can also play functions such as dustproof and waterproof, and can be disassembled and assembled conveniently and has an extendable function.

[0026] As a technical optimization scheme of the present utility model, a wire threading hole 31 is opened at the center of the wire threading base 3, and four mutually symmetrical rectangular grooves 41 are opened on the side wall of the annular groove 4. Each rectangular groove 41 corresponds to the fixing frame 6 one by one. The cable penetrates into the junction box 2 through the wire threading hole 31. The rectangular groove 41 facilitates the rotation of the lever 8, so that the clamping mechanism 7 can act as the bolt 11 rotates.

[0027] As a technical optimization solution of the present utility model, the clamping mechanism 7 includes a lever 8 and a pressing wheel 9. The top of the fixed frame 6 is rotatably connected to the lever 8. One end of the lever 8 is located in the annular groove 4, and the other end of the lever 8 passes through the rectangular groove 41. One end of the lever 8 is rotatably connected to a pulley 91, and the other end of the lever 8 is rotatably connected to the pressing wheel 9. Four symmetrically arranged tension springs 81 are fixedly connected to the inner wall of the annular groove 4, and the end of each tension spring 81 is fixedly connected to the side wall of the lever 8 respectively. Before threading the cable, the tension springs 81 tighten the lever 8, making the distance between the pressing wheels 9 the largest, that is, the diameter of the space formed between the pressing wheels 9 is the largest, facilitating the insertion of the cable. When the bolt 11 is tightened, the end of the bolt 11 abuts against the pulley 91, and the pulley 91 drives the lever 8 to rotate under force, making the distance between the pressing wheels 9 smaller. The tension springs 81 are stretched under force, and finally each pressing wheel 9 abuts against the outer surface of the cable. As the bolt 11 is further tightened, the pressing wheel 9 finally presses the cable tightly, effectively preventing the cable from loosening.

[0028] As a technical optimization solution of the present utility model, a rubber film 10 is fixedly connected to one side of the lever 8, and the other side of the rubber film 10 is fixedly connected to the adjacent side wall of the lever 8. When threading the cable, the pressing wheel 9 abuts against the cable while the rubber film 10 contacts the cable, which can seal the wire passing hole 31, reduce the entry of external dust and moisture into the junction box 2, and improve the service life of the electronic components in the junction box 2.

[0029] As a technical optimization solution of the present utility model, a through hole 12 is opened in the center of the bolt 11, and the inner diameter of the through hole 12 is the same as the inner diameter of the wire passing hole 31. Two fixing blocks 14 are symmetrically arranged at the top and bottom of the through hole 12. The cable passes through the bolt 11 through the through hole 12, and the fixing blocks 14 facilitate the connection of the bolt 11 to the protection mechanism 13.

[0030] As a technical optimization solution of the present utility model, an external thread is provided on one side of the bolt 11, and an internal thread 5 is opened on the outer wall of the annular groove 4. The external thread is adapted to the internal thread 5. The bolt 11 is threadedly connected to the wire passing seat 3. The threaded connection has a self-locking effect. When the bolt 11 drives the clamping mechanism 7 to work, even if the clamping diameters required for cables of different diameters are different, it can be adjusted by tightening or loosening the bolt 11, and at the same time, it does not affect the stability of the bolt 11 itself.

[0031] As a technical optimization solution of the present utility model, the protection mechanism 13 includes a rotating block 15 and a corrugated pipe 17. The rotating block 15 is of an annular structure. The top and bottom of the rotating block 15 are symmetrically provided with rotary mating grooves 16. The size of the mating grooves 16 is adapted to the fixing block 14. One side of the rotating block 15 is fixedly connected with a corrugated pipe 17, and the end of the corrugated pipe 17 is fixedly connected with a connecting block. The protection mechanism 13 fixes the rotating block 15 on the side wall of the bolt 11 by inserting the rotating block 15 into the through hole 12 and rotating it to make the fixing block 14 access the rotary position of the mating groove 16. After connection, the corrugated pipe 17 is pulled, so that the corrugated pipe 17 extends and covers the outer surface of the cable, playing a protective function. The connecting block can connect two or more protection mechanisms 13 to facilitate the protection of cables with longer lengths.

[0032] When the present utility model is in use, the installer first passes the cable through the corrugated pipe 17, the rotating block 15, the through hole 12 and the wire threading hole 31, and finally inserts it into the junction box 2. After the installer connects the cable to the wiring terminal in the junction box 2 and closes the junction box 2, at this time, the bolt 11 is inserted into the annular groove 4 and the bolt 11 is tightened. The end of the bolt 11 abuts against the pulley 91, and the pulley 91 drives the lever 8 to rotate under force, so that the distance between the pressing wheels 9 becomes smaller, and the tension spring 81 is stretched under force. Finally, each pressing wheel 9 abuts against the outer surface of the cable. As the bolt 11 is further tightened, the pressing wheel 9 finally presses the cable tightly. At the same time, the rubber film 10 contacts the cable to seal the wire threading hole 31. Then, the rotating block 15 is inserted into the through hole 12 and rotated to make the fixing block 14 access the rotary position of the mating groove 16, so that the rotating block 15 can be fixed on the side wall of the bolt 11. After connection, the corrugated pipe 17 is pulled, so that the corrugated pipe 17 extends and covers the outer surface of the cable. If the length of the corrugated pipe 17 is insufficient, two or more protection mechanisms 13 can also be used in cooperation.

[0033] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A three-phase asynchronous motor with a cable protection device, comprising a three-phase motor (1) and a threading seat (3), characterized in that: The bottom of the three-phase motor (1) is provided with a mounting base, one side of the three-phase motor (1) is provided with a fan and a fan guard, the top of the three-phase motor (1) is provided with a junction box (2), one side of the junction box (2) is fixedly connected to a threading seat (3), one side of the threading seat (3) is provided with an annular groove (4), the inner wall of the annular groove (4) is fixedly provided with four mutually symmetrical fixing frames (6), a clamping mechanism (7) is rotatably connected to the fixing frame (6), the inner thread of the annular groove (4) is connected with a bolt (11), and the end of the bolt (11) away from the threading seat (3) is movably connected with a protective mechanism (13).

2. A three-phase asynchronous motor with a cable protection device according to claim 1, characterized in that: The threading seat (3) is provided with a threading hole (31) at its center, and the side wall of the annular groove (4) is provided with four mutually symmetrical rectangular grooves (41), each rectangular groove (41) corresponding to a fixing frame (6) one by one.

3. A three-phase asynchronous motor with a cable protection device according to claim 2, characterized in that: The clamping mechanism (7) comprises a lever (8) and a clamping wheel (9); the top of the fixed frame (6) is rotatably connected to the lever (8); one end of the lever (8) is located in the annular groove (4); the other end of the lever (8) passes through the rectangular groove (41); one end of the lever (8) is rotatably connected to a pulley (91); the other end of the lever (8) is rotatably connected to the clamping wheel (9); four mutually symmetrical tension springs (81) are fixedly connected to the inner wall of the annular groove (4); the ends of each tension spring (81) are respectively fixedly connected to the side wall of the lever (8).

4. A three-phase asynchronous motor with a cable protection device according to claim 3, characterized in that: A rubber membrane (10) is fixedly connected to one side of the lever (8), and the other side of the rubber membrane (10) is fixedly connected to an adjacent side wall of the lever (8).

5. The three-phase asynchronous motor with a cable protection device according to claim 2, characterized in that: A through hole (12) is provided at the center of the bolt (11), the inner diameter of the through hole (12) is the same as the inner diameter of the threading hole (31), and two fixing blocks (14) are symmetrically arranged at the top and bottom of the through hole (12).

6. The three-phase asynchronous motor with a cable protection device according to claim 1, characterized in that: One side of the bolt (11) is provided with an external thread, and the outer wall of the annular groove (4) is provided with an internal thread (5), and the external thread is matched with the internal thread (5).

7. The three-phase asynchronous motor with a cable protection device according to claim 5, characterized in that: The protection mechanism (13) comprises a rotating block (15) and a bellows (17). The rotating block (15) is an annular structure. The top and bottom of the rotating block (15) are symmetrically provided with rotary matching grooves (16). The size of the matching grooves (16) is adapted to the fixed block (14). One side of the rotating block (15) is fixedly connected to the bellows (17), and the end of the bellows (17) is fixedly connected to the connecting block.

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