Explosion-proof variable frequency motor
By setting movable clamps and other structures in the junction box of the explosion-proof frequency converter motor to fix the leads, avoiding the poor contact problems caused by vibration, and adding heat sinks to the heat dissipation sleeve to improve heat dissipation efficiency, solving the problems of lead swing and poor heat dissipation during the motor operation, ensuring the normal operation and service life of the motor.
Patent Information
- Application Number
- CN202421954289.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The leads of the existing explosion-proof frequency converter motors are prone to swing due to vibration during operation, causing contact points to disconnect and affecting normal operation. In addition, it is difficult for the traditional motor housing to dissipate heat quickly, resulting in the motor running at high temperature and reducing service life.
An explosion-proof frequency conversion motor is designed to fix the leads by setting movable ply plates, partitions, arc grooves and rubber pads in the junction box to avoid swinging; at the same time, a heat sink is installed outside the heat dissipation sleeve to increase the heat dissipation area and improve the heat dissipation efficiency.
It effectively avoids the poor contact problems caused by vibration of leads, ensures the normal operation of the motor, and increases the heat dissipation area, improves the heat dissipation efficiency of the motor, reduces the risk of high-temperature operation, and extends the service life of the motor.
Smart Images
Figure CN223052851U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors, and particularly relates to an explosion-proof variable-frequency motor. Background Technique
[0002] A motor, commonly known as a "motor", refers to an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. The motor is represented by the letter M in the circuit (D in the old standard). Its main function is to generate a driving torque and serve as the power source for electrical appliances or various machinery. There are many classifications of motors, and among them, the explosion-proof variable-frequency motor belongs to one type of motor. Since the explosion-proof motor does not generate electric sparks during operation, a motor that can prevent gas explosion can be installed in places with explosive gases. The explosion-proof motor is suitable for explosion-hazardous places such as oil, chemical industry, and coal mines.
[0003] Currently, for existing explosion-proof variable-frequency motors, after the leads are installed, most of them do not have the function of fixing them, resulting in the leads swinging with the vibration of the motor during operation. After a long time of swinging, the contact points between the leads and the motor will become detached, resulting in poor contact between the leads and the motor, affecting its normal operation. Moreover, a large amount of heat is generated during use. By setting the outer shell of the motor into a corrugated metal structure, the convenience of the motor outer shell is increased, thereby achieving the purpose of increasing the heat dissipation area. However, when the explosion-proof variable-frequency motor operates at high power, the heat generated is much more than that generated under normal operation. The traditional motor outer shell is difficult to achieve rapid heat dissipation, resulting in the motor operating at high temperature and reducing the service life of the motor. For this reason, we propose an explosion-proof variable-frequency motor. Content of the Utility Model
[0004] (I) Technical Problems to be Solved
[0005] The purpose of the utility model is to provide an explosion-proof variable-frequency motor to solve the problems raised in the above background technique. Since most existing explosion-proof variable-frequency motors do not have the function of fixing the leads after installation, the leads will swing with the vibration of the motor during operation. After a long time of swinging, the contact points between the leads and the motor will become detached, resulting in poor contact between the leads and the motor, affecting its normal operation. And the traditional motor outer shell is difficult to achieve rapid heat dissipation, resulting in the motor operating at high temperature and reducing the service life of the motor.
[0006] (II) Technical Solutions
[0007] To achieve the above object, the utility model provides the following technical solutions: An explosion-proof variable-frequency motor, comprising a motor body, a heat dissipation sleeve and a junction box. A junction box is provided at the rear side of the top end of the motor body. Two wiring grooves are opened on one axial side of the outer part of the junction box. A partition is provided between the two wiring grooves. First arc-shaped grooves are opened on both sides of the partition. An active clamping plate is provided on the inner wall surface of one side of the wiring groove away from the partition. The active clamping plate is slidably connected with the inner wall of the wiring groove. A second arc-shaped groove is opened on one side of the active clamping plate. A threaded sleeve is provided on one side of the active clamping plate. A screw rod is provided inside the threaded sleeve. The screw rod is in spiral connection with the threaded sleeve. One end of the screw rod extends to the outside of the shell of the junction box.
[0008] Preferably, the heat dissipation sleeve is fixedly sleeved outside the motor body through mounting screws. A plurality of protrusions are provided on the outside of the heat dissipation sleeve. The protrusions and the heat dissipation sleeve are an integral whole. Heat dissipation fins are provided on both outer sides of the protrusions. The heat dissipation fins are fixedly connected with both outer sides of the protrusions.
[0009] Preferably, sleeves are fixedly installed on both outer sides of the junction box by means of inlaying. The screw rod passes through the sleeve and extends to the outside. One end of the screw rod is movably connected with the sleeve through a bearing.
[0010] Preferably, rubber pads are provided inside both the first arc-shaped groove and the second arc-shaped groove. The rubber pads are fixedly arranged inside the first arc-shaped groove and the second arc-shaped groove by means of gluing.
[0011] Preferably, limiting grooves are opened on the inner wall surfaces of both sides inside the sleeve. A limiting block is fixedly installed on the outer side of one end of the threaded sleeve away from the active clamping plate. The threaded sleeve is slidably connected with the sleeve through the provided limiting grooves and limiting blocks.
[0012] Preferably, mounting seats are provided on both sides of the bottom end of the motor body. The mounting seats are fixedly installed on both sides of the bottom of the motor body by means of welding.
[0013] Preferably, a knob is provided at one end of the screw rod extending to the outside of the junction box. The knob is fixedly installed at one end of the screw rod by means of plugging.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. By providing an active clamping plate at one end of the lead wire in contact with the contact point inside the junction box, and cooperating with the partition, the first arc-shaped groove, the second arc-shaped groove and the rubber pad, the fixation of one end of the lead wire is realized, avoiding the lead wire from swinging with the vibration of the motor during operation. Long-term swinging will cause the contact point between the lead wire and the motor to become disengaged, resulting in poor contact between the lead wire and the motor contact point and affecting its normal operation.
[0016] 2. By arranging heat sinks on both sides of the external protrusions of the heat dissipation sleeve, the heat sinks are used to increase the heat dissipation area of the heat dissipation sleeve, so that the heat on the heat dissipation sleeve is transferred to the heat sinks by heat conduction, and the heat is diffused by the heat sinks, which can effectively increase the heat dissipation efficiency. Brief Description of the Drawings
[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;
[0018] Figure 2 It is a schematic diagram of the heat dissipation sleeve structure of the present utility model;
[0019] Figure 3 It is a schematic diagram of the junction box structure of the present utility model;
[0020] Figure 4 It is a schematic diagram of the movable clamping plate structure of the present utility model.
[0021] In the figure: 1. Motor body; 2. Mounting seat; 3. Heat dissipation sleeve; 4. Junction box; 5. Protrusion; 6. Heat sink; 7. Wiring groove; 8. Partition board; 9. First arc groove; 10. Movable clamping plate; 11. Second arc groove; 12. Rubber pad; 13. Threaded sleeve; 14. Sleeve; 15. Screw; 16. Knob; 17. Limit block; 18. Limit groove. Detailed Embodiment
[0022] 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 of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0023] Please refer to Figures 1 - 4 , the present utility model provides an explosion-proof variable-frequency motor technical solution: including a motor body 1, a heat dissipation sleeve 3 and a junction box 4. A junction box 4 is provided at the external top end of the motor body 1. Two wiring grooves 7 are opened on one side of the external of the junction box 4. A partition board 8 is provided between the two wiring grooves 7. First arc grooves 9 are opened on both sides of the partition board 8. The inner wall surface of the wiring groove 7 far from the partition board 8 is provided with a movable clamping plate 10. The movable clamping plate 10 is slidably connected to the inner wall of the wiring groove 7. A second arc groove 11 is opened on one side of the movable clamping plate 10. A threaded sleeve 13 is provided on one side of the movable clamping plate 10. A screw 15 is provided inside the threaded sleeve 13. The screw 15 is helically connected to the threaded sleeve 13. One end of the screw 15 extends to the outside of the shell of the junction box 4.
[0024] Specifically, a heat dissipation sleeve 3 is fixedly sleeved outside the motor body 1 through mounting screws. A number of protrusions 5 are provided outside the heat dissipation sleeve 3. The protrusions 5 and the heat dissipation sleeve 3 are an integral body. Heat dissipation fins 6 are provided on both outer sides of the protrusions 5. The heat dissipation fins 6 are fixedly connected to both outer sides of the protrusions 5.
[0025] Specifically, sleeves 14 are fixedly installed on both outer sides of the junction box 4 by means of inlaying. A screw rod 15 passes through the sleeve 14 and extends to the outside. One end of the screw rod 15 is movably connected to the sleeve 14 through a bearing.
[0026] Specifically, rubber pads 12 are provided inside both the first arc-shaped groove 9 and the second arc-shaped groove 11. The rubber pads 12 are fixedly arranged inside the first arc-shaped groove 9 and the second arc-shaped groove 11 by means of gluing.
[0027] Specifically, limiting grooves 18 are formed on the inner wall surfaces of both sides inside the sleeve 14. A limiting block 17 is fixedly installed on the outer side of the end of the threaded sleeve 13 far from the movable clamping plate 10. The threaded sleeve 13 is slidably connected to the sleeve 14 through the provided limiting grooves 18 and limiting blocks 17.
[0028] Specifically, mounting seats 2 are provided on both sides of the bottom end outside the motor body 1. The mounting seats 2 are fixedly installed on both sides of the bottom of the motor body 1 by means of welding.
[0029] Specifically, a knob 16 is provided at one end of the screw rod 15 extending outside the junction box 4. The knob 16 is fixedly installed at one end of the screw rod 15 by means of plugging.
[0030] During the use of this implementation scheme, by providing the heat dissipation sleeve 3 outside the motor body 1 and arranging the heat dissipation fins 6 on both sides of the protrusions 5 on the outer periphery of the heat dissipation sleeve 3, the heat dissipation area of the heat dissipation sleeve 3 is increased by using the heat dissipation fins 6, so as to achieve the purpose of improving the heat dissipation efficiency and accelerating the heat dissipation of the motor body 1. When wiring, by rotating the knob 16, the movable clamping plate 10 is separated from the partition plate 8, and then the lead wire is sleeved on the contact point inside the junction box 4. Then, rotate the knob 16 in the reverse direction, and by the rotation of the screw rod 15, the threaded sleeve 13 is pushed to move inwards, so as to tightly connect the movable clamping plate 10 and the partition plate 8, and the lead wire is clamped in the cylindrical groove formed by the first arc-shaped groove 9 and the second arc-shaped groove 11, so as to ensure the stability of the lead wire and avoid the lead wire being pulled by the contact point, resulting in poor contact of the lead wire. The rubber pad 12 is used to play a buffering role to avoid excessive extrusion force and damage to the skin of the lead wire, resulting in electric leakage.
[0031] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. An explosion-proof variable frequency motor, comprising a motor body (1), a heat sink (3) and a junction box (4), characterized in that: A terminal box (4) is provided at the rear side of the external top end of the motor body (1); two terminal slots (7) are axially provided on one side of the outside of the terminal box (4); a partition (8) is provided between the two terminal slots (7); first arc-shaped slots (9) are provided on both sides of the partition (8); a movable clamping plate (10) is provided on the inner wall surface of the terminal slot (7) away from the partition (8); the movable clamping plate (10) is slidably connected to the inner wall of the terminal slot (7); a second arc-shaped slot (11) is provided on one side of the movable clamping plate (10); a threaded sleeve (13) is provided on one side of the movable clamping plate (10); a screw (15) is provided inside the threaded sleeve (13); the screw (15) is spirally connected to the threaded sleeve (13); one end of the screw (15) extends to the outside of the housing of the terminal box (4).
2. The explosion-proof variable frequency motor according to claim 1, characterized in that: The external fixing sleeve of the motor body (1) is provided with a heat dissipation sleeve (3), the exterior of the heat dissipation sleeve (3) is provided with a plurality of protrusions (5), the protrusions (5) and the heat dissipation sleeve (3) are integrally formed, and heat dissipation fins (6) are provided on both sides of the exterior of the protrusions (5), and the heat dissipation fins (6) are fixedly connected to both sides of the exterior of the protrusions (5).
3. The explosion-proof variable frequency motor according to claim 1, characterized in that: Sleeves (14) are fixedly mounted on both sides of the outside of the junction box (4) by means of embedding, the screw rod (15) passes through the sleeves (14) and extends to the outside, and one end of the screw rod (15) is movably connected to the sleeves (14) via a bearing.
4. The explosion-proof variable frequency motor according to claim 1, characterized in that: The first arc-shaped groove (9) and the second arc-shaped groove (11) are both provided with rubber pads (12) inside, and the rubber pads (12) are fixed inside the first arc-shaped groove (9) and the second arc-shaped groove (11) by gluing.
5. The explosion-proof variable frequency motor according to claim 3, characterized in that: Limiting grooves (18) are provided on the inner wall surfaces of both sides of the sleeve (14); a limiting block (17) is fixedly installed on the outer side of one end of the threaded sleeve (13) away from the movable clamping plate (10); and the threaded sleeve (13) is slidably connected to the sleeve (14) via the limiting grooves (18) and the limiting block (17).
6. The explosion-proof variable frequency motor according to claim 1, characterized in that: Mounting seats (2) are provided on both sides of the outer bottom end of the motor body (1), and the mounting seats (2) are fixedly mounted on both sides of the bottom of the motor body (1).
7. The explosion-proof variable frequency motor according to claim 1, characterized in that: One end of the screw rod (15) extending to the outside of the junction box (4) is provided with a knob (16), and the knob (16) is fixedly mounted on one end of the screw rod (15).