An explosion-proof motor with a cooling shaft structure

Abstract

The present invention discloses an explosion-proof motor with a cooling shaft structure, which relates to the technical field of motors and includes a mounting base plate. The upper end surface of the mounting base plate is fixedly connected with an explosion-proof housing. An explosion-proof inner housing is arranged at the upper end inside the explosion-proof housing. A stator assembly is arranged inside the explosion-proof inner housing. A motor shaft is rotatably connected inside the explosion-proof inner housing, and a rotor assembly is arranged at the position of the motor shaft inside the explosion-proof inner housing. One end of the motor shaft located inside the explosion-proof housing is fixedly connected with an end shaft, and the end of the end shaft away from the motor shaft is fixedly connected with a hexagonal shaft. A heat exchange channel is opened inside the motor shaft, and a communication channel is opened inside the end shaft. Through the provided connection joint, cold shaft assembly, heat exchange channel, communication channel and communication hole, the present invention can cool the motor shaft and the inside of its explosion-proof inner housing during operation, thereby realizing internal temperature reduction and avoiding overheating and thermal damage of the motor shaft.

Description

Technical Field

[0001] The invention relates to the technical field of motors, in particular to an explosion-proof motor with a cooling shaft structure. Background Art

[0002] Explosion-proof motors are motors that can be used in flammable and explosive places and do not generate sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, they are also widely used in textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, medicine and other sectors. As the main power equipment, explosion-proof motors are usually used to drive pumps, fans, compressors and other transmission machinery.

[0003] During the operation of the explosion-proof motor, the inside of the explosion-proof motor needs to be cooled to avoid overheating. For example, the prior art CN 117914058B proposes a special explosion-proof motor for the natural gas industry with a self-cooling function, including a motor housing and a housing end cover. The motor housing is provided with a stator, a rotor and a motor output shaft; a circulating cooling chamber is spirally opened in the motor housing, and the device cools the motor housing through the cooling chamber shell.

[0004] Although the above-mentioned explosion-proof motor can achieve the function of self-cooling by cooling the casing, during the operation of the motor, heat is generated inside and conducted to the casing. Although only the casing is dissipated, the problem of overheating of the casing can be solved, the heat inside the motor cannot be reduced quickly, resulting in overheating inside the motor, which in turn causes overheating of the motor shaft, and may seriously cause thermal damage to the motor shaft. In response to the above-mentioned problems, we provide an explosion-proof motor with a cooling shaft structure to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide an explosion-proof motor with a cooling shaft structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An explosion-proof motor with a cooling shaft structure comprises a mounting base plate, an upper surface of the mounting base plate is fixedly connected to an explosion-proof outer shell, an upper end of the explosion-proof outer shell is provided with an explosion-proof inner shell, a stator assembly is provided inside the explosion-proof inner shell, a motor shaft is rotatably connected inside the explosion-proof inner shell, and a rotor assembly is provided at a position of the motor shaft inside the explosion-proof inner shell;

[0008] One end of the motor shaft located inside the explosion-proof housing is fixedly connected to an end shaft. One end of the end shaft away from the motor shaft is fixedly connected to a hexagonal shaft. A heat exchange channel is opened inside the motor shaft. A communication channel is opened inside the end shaft. The communication channel penetrates through the motor shaft and is communicated with the heat exchange channel. Communication holes are provided at the ends of the heat exchange channel and the communication channel. Connection joints are installed at the positions of the motor shaft and the end shaft corresponding to the communication holes. The lower end of the connection joint on the motor shaft is connected to a liquid return pipe, and one side of the connection joint on the end shaft is connected to an infusion pipe. A cold shaft assembly for conveying a cooling liquid into the communication channel is provided inside the explosion-proof housing.

[0009] As a further scheme of the present invention: The connection joint includes an annular housing. Bearings are provided at both ends of the annular housing. Sealing rings are provided at positions close to the bearings inside the annular housing.

[0010] As a further scheme of the present invention: The cold shaft assembly includes a pump housing. The pump housing is arranged below the connection joint. A cooling cavity is provided at the lower end inside the explosion-proof housing. The cooling cavity is filled with a coolant. The water inlet of the pump housing is connected to a suction pipe. Both the suction pipe and the liquid return pipe extend into the cooling cavity. The outlet end of the pump housing is connected to an output pipe. The output pipe is communicated with the infusion pipe. An impeller is provided inside the pump housing. A driving assembly for driving the impeller inside the pump housing is further provided inside the explosion-proof housing.

[0011] As a further scheme of the present invention: The driving assembly includes a second conical friction roller. The second conical friction roller is fixedly connected to the end shaft. A fixed side plate is fixedly connected to one side inside the explosion-proof housing. A driving shaft is rotatably connected to the fixed side plate. The driving shaft is fixedly connected to the impeller shaft inside the pump housing. A first conical friction roller is fixedly connected to the driving shaft. A friction circular belt for transmission is provided between the two first conical friction rollers. An adjusting assembly for adjusting the position of the friction circular belt is provided on the hexagonal shaft.

[0012] As a further scheme of the present invention: The adjusting assembly includes a fixed ring. The fixed ring is fixedly connected to one end of the hexagonal shaft away from the end shaft. A sliding ring is slidably connected to the hexagonal shaft. A second connecting rod is rotatably connected to the sliding ring. A first connecting rod is rotatably connected to the fixed ring. The opposite ends of the second connecting rod and the first connecting rod are rotatably connected. A counterweight block is fixedly connected to the end of the second connecting rod. A spring is penetrated through the position of the hexagonal shaft between the sliding ring and the fixed ring. A pushing assembly for pushing the friction circular belt to move is further provided on the sliding ring.

[0013] As a further solution of the present invention: The pushing component includes a rotating ring, which is rotatably connected in a ring groove on the surface of the sliding ring. A L-shaped support rod is fixedly connected to the lower end of the rotating ring. The L-shaped support rod is slidably connected to the fixed side plate. Two limiting rotating rods for limiting the friction round belt are rotatably connected to both sides of the end of the L-shaped support rod away from the rotating ring.

[0014] As a further solution of the present invention: A cold shell component for further reducing the heat inside the explosion-proof inner shell is also provided on the explosion-proof inner shell.

[0015] As a further solution of the present invention: The cold shell component includes a corrugated flat tube, which is embedded on the surface of the explosion-proof inner shell. One end of the corrugated flat tube is connected to a liquid inlet pipe, and the liquid inlet pipe is communicated with the output pipe. The other end of the corrugated flat tube is connected to a liquid outlet pipe, and the lower end of the liquid outlet pipe extends into the cooling cavity. An electromagnetic valve is also provided on the liquid inlet pipe. A limit switch is installed on the fixed side plate, and the limit switch is electrically connected to the electromagnetic valve.

[0016] As a further solution of the present invention: A refrigerator is installed on one side of the explosion-proof outer shell. The evaporator of the refrigerator is arranged inside the cooling cavity, and a temperature sensor is also provided at the bottom of the cooling cavity.

[0017] As a further solution of the present invention: Support seats fixedly connected to the inner wall of the explosion-proof outer shell are provided on both the annular cover shell and the pump shell.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By providing the connection joint, cold shaft component, heat exchange channel, communication channel and communication hole, the present invention can cool the motor shaft and the inside of the explosion-proof inner shell during operation, thereby realizing internal temperature reduction and avoiding the situation of overheating and thermal damage of the motor shaft.

[0020] 2. By providing the corrugated flat tube, liquid outlet pipe and liquid inlet pipe, the present invention can dissipate heat and cool the explosion-proof inner shell during operation, and at the same time cooperate with the cooling of the motor shaft, thereby effectively avoiding the situation of overheating of the motor during high-speed operation.

[0021] 3. When the present invention is working, the adjusting component provided can automatically adjust the rotational speed of the impeller inside the pump housing according to the rotational speed of the motor. When the motor runs at a low speed, the pump housing rotates to only supply coolant into the motor shaft. When the motor shaft runs at a high speed, the adjusting component drives the L-shaped support rod to move towards the fixed side plate, changing the transmission ratio between the end shaft and the drive shaft, so that the impeller inside the pump housing runs at a high speed to increase the power. At the same time, the end of the L-shaped support rod touches the limit switch to open the solenoid valve, and then supply liquid into both the threaded flat tube and the motor shaft simultaneously, realizing the simultaneous cooling of the housing and the motor shaft, and thus meeting the heat dissipation requirements of the motor when running at a high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention.

[0023] Figure 2 is a schematic internal structural diagram of the present invention.

[0024] Figure 3 is a schematic structural diagram of the drive component in the present invention.

[0025] Figure 4 is a schematic structural diagram of the adjusting component in the present invention.

[0026] Figure 5 is a schematic cross-sectional structural diagram of the motor shaft in the present invention.

[0027] Figure 6 is a schematic cross-sectional structural diagram of the connection joint in the present invention.

[0028] Among them: 1. Installation base plate; 2. Explosion-proof housing; 3. Motor shaft; 4. Refrigerator; 5. Evaporator; 6. First conical friction roller; 7. Pump housing; 8. Connection joint; 9. Cooling cavity; 10. Temperature sensor; 11. Communication channel; 12. Liquid outlet pipe; 13. Threaded flat tube; 14. Explosion-proof inner shell; 15. Liquid return pipe; 16. Support seat; 17. Second conical friction roller; 18. Fixed side plate; 19. Suction pipe; 20. Counterweight; 21. First connecting rod; 22. Second connecting rod; 23. Friction round belt; 25. Liquid inlet pipe; 26. Liquid delivery pipe; 27. Output pipe; 28. L-shaped support rod; 29. Drive shaft; 30. End shaft; 31. Hexagonal shaft; 32. Fixed ring; 33. Spring; 34. Rotating ring; 35. Sliding ring; 36. Limit rotating rod; 37. Heat exchange channel; 38. Communication hole; 39. Solenoid valve; 40. Limit switch.

[0029] 81. Annular cover shell; 82. Sealing ring; 83. Bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 - 6 , in an embodiment of the present invention, an explosion-proof motor with a cooling shaft structure includes a mounting base plate 1. The upper end surface of the mounting base plate 1 is fixedly connected with an explosion-proof housing 2. An explosion-proof inner housing 14 is provided at the upper end inside the explosion-proof housing 2. A stator assembly is provided inside the explosion-proof inner housing 14. A motor shaft 3 is rotatably connected inside the explosion-proof inner housing 14. A rotor assembly is provided at the position of the motor shaft 3 inside the explosion-proof inner housing 14. One end of the motor shaft 3 inside the explosion-proof housing 2 is fixedly connected with an end shaft 30. One end of the end shaft 30 away from the motor shaft 3 is fixedly connected with a hexagonal shaft 31. A heat exchange channel 37 is opened inside the motor shaft 3. A communication channel 11 is opened inside the end shaft 30. The communication channel 11 penetrates through the motor shaft 3 and is communicated with the heat exchange channel 37. Communication holes 38 are provided at the ends of the heat exchange channel 37 and the communication channel 11. When cooling the motor shaft 3, the coolant flows in from the communication hole 38 at one end of the communication channel 11, then enters the communication channel 11, enters the heat exchange channel 37 through the communication channel 11, and then discharges from the communication hole 38 at one end of the heat exchange channel 37. When the coolant flows through the communication channel 11 and the heat exchange channel 37, heat exchange occurs between the coolant and the motor shaft 3, thereby taking away the heat on the motor shaft 3 and realizing the cooling of the motor shaft 3.

[0032] Connection joints 8 are installed at the positions of the motor shaft 3 and the end shaft 30 corresponding to the communication holes 38. The connection joint 8 includes an annular cover shell 81. Bearings 83 are provided at both ends of the annular cover shell 81. Sealing rings 82 are provided inside the annular cover shell 81 near the bearings 83. A return liquid pipe 15 is connected to the lower end of the connection joint 8 on the motor shaft 3. An infusion pipe 26 is connected to one side of the connection joint 8 on the end shaft 30. A cold shaft assembly for conveying cooling liquid into the communication channel 11 is provided inside the explosion-proof housing 2; through the provided cold shaft assembly, the coolant can be conveyed to the connection joint 8, and then conveyed into the communication channel 11 through the connection joint 8. The provided bearings 83 can ensure that the annular cover shell 81 does not rotate together with the end shaft 30. The provided sealing rings 82 can perform sealing to prevent coolant leakage.

[0033] The cold shaft assembly includes a pump housing 7, the pump housing 7 is arranged below the connecting joint 8, a cooling chamber 9 is provided at the lower end inside the explosion-proof housing 2, the cooling chamber 9 is filled with a coolant, the water inlet of the pump housing 7 is connected with a suction pipe 19, both the suction pipe 19 and the liquid return pipe 15 extend into the cooling chamber 9, the outlet end of the pump housing 7 is connected with an output pipe 27, the output pipe 27 is communicated with an infusion pipe 26, an impeller is arranged inside the pump housing 7, and a driving assembly for driving the impeller inside the pump housing 7 is further arranged inside the explosion-proof housing 2; support seats 16 fixedly connected with the inner wall of the explosion-proof housing 2 are arranged on both the annular cover 81 and the pump housing 7; during operation, the driving assembly drives the impeller inside the pump housing 7 to rotate, the impeller inside the pump housing 7 rotates to suck the coolant inside the cooling chamber 9 from the suction pipe 19 to the output pipe 27, then enters the infusion pipe 26, and further is conveyed to the connecting joint 8.

[0034] The driving assembly includes a second conical friction roller 17, the second conical friction roller 17 is fixedly connected to an end shaft 30, a fixed side plate 18 is fixedly connected to one side inside the explosion-proof housing 2, a driving shaft 29 is rotatably connected to the fixed side plate 18, the driving shaft 29 is fixedly connected to the impeller shaft inside the pump housing 7, a first conical friction roller 6 is fixedly connected to the driving shaft 29, a friction round belt 23 for transmission is arranged between the two first conical friction rollers 6, and an adjusting assembly for adjusting the position of the friction round belt 23 is arranged on the hexagonal shaft 31; the motor shaft 3 rotates to drive the end shaft 30 to rotate, the end shaft 30 rotates to drive the second conical friction roller 17 to rotate, the rotation of the second conical friction roller 17 can drive the friction round belt 23 to operate, the operation of the friction round belt 23 can drive the first conical friction roller 6 to rotate, the rotation of the first conical friction roller 6 can drive the impeller inside the pump housing 7 to rotate, and the arranged adjusting assembly can automatically adjust the position of the second connecting rod 22 according to the rotation speed of the motor shaft 3 during operation.

[0035] The adjusting component includes a fixed ring 32 which is fixedly connected to one end of the hexagonal shaft 31 away from the end shaft 30. A sliding ring 35 is slidably connected to the hexagonal shaft 31. A second connecting rod 22 is rotatably connected to the sliding ring 35. A first connecting rod 21 is rotatably connected to the fixed ring 32. The opposite ends of the second connecting rod 22 and the first connecting rod 21 are rotatably connected. A counterweight 20 is fixedly connected to the end of the second connecting rod 22. A spring 33 is disposed through the hexagonal shaft 31 at a position between the sliding ring 35 and the fixed ring 32. The sliding ring 35 is further provided with a pushing component for pushing the friction circular belt 23 to move. The pushing component includes a rotating ring 34 which is rotatably connected to a ring groove on the surface of the sliding ring 35. An L-shaped support rod 28 is fixedly connected to the lower end of the rotating ring 34. The L-shaped support rod 28 is slidably connected to the fixed side plate 18. Two limiting rotating rods 36 for limiting the friction circular belt 23 are rotatably connected to both sides of the end of the L-shaped support rod 28 away from the rotating ring 34. During operation, the rotation of the end shaft 30 drives the rotation of the hexagonal shaft 31. The rotation of the hexagonal shaft 31 drives the rotation of the sliding ring 35. The rotation of the sliding ring 35 drives the rotation of the second connecting rod 22. When the second connecting rod 22 rotates, the centrifugal force generated by the counterweight 20 drives the expansion of the second connecting rod 22 and the first connecting rod 21, causing the sliding ring 35 to move towards the fixed ring 32. The faster the rotation speed of the hexagonal shaft 31, the greater the centrifugal force generated by the counterweight 20, and correspondingly, the greater the amplitude of the sliding ring 35 moving towards the fixed ring 32 against the elastic force of the spring 33. When the sliding ring 35 moves, it also drives the L-shaped support rod 28 to move. The movement of the L-shaped support rod 28 can drive the limiting rotating rod 36, and the limiting rotating rod 36 drives the lateral movement of the friction circular belt 23, thereby realizing the change of the transmission ratio between the end shaft 30 and the drive shaft 29. When the rotation speed of the motor shaft 3 is higher, the amplitude of the friction circular belt 23 moving towards the large end of the second conical friction roller 17 is greater, and the position of the friction circular belt 23 on the first conical friction roller 6 will move to the small end, thereby increasing the rotation speed of the drive shaft 29 and increasing the pumping speed of the impeller inside the pump housing 7.

[0036] A cold shell assembly for further reducing the heat inside the explosion-proof inner shell 14 is also provided on the explosion-proof inner shell 14; the cold shell assembly includes a corrugated flat tube 13, the corrugated flat tube 13 is embedded on the surface of the explosion-proof inner shell 14, one end of the corrugated flat tube 13 is connected to a liquid inlet pipe 25, the liquid inlet pipe 25 is communicated with an output pipe 27, the other end of the corrugated flat tube 13 is connected to a liquid outlet pipe 12, the lower end of the liquid outlet pipe 12 extends into the cooling cavity 9, an electromagnetic valve 39 is further provided on the liquid inlet pipe 25, a limit switch 40 is installed on the fixed side plate 18, and the limit switch 40 is electrically connected to the electromagnetic valve 39; when the motor runs at a high speed, the end block of the L-shaped support rod 28 will touch the limit switch 40 to open the electromagnetic valve 39, and then supply liquid to both the corrugated flat tube 13 and the motor shaft 3 at the same time, realizing the simultaneous cooling of the outer shell and the motor shaft 3, and further meeting the heat dissipation requirements of the motor under high-speed operation.

[0037] A refrigerator 4 is installed on one side of the explosion-proof outer shell 2, an evaporator 5 of the refrigerator 4 is arranged inside the cooling cavity 9, and a temperature sensor 10 is further provided at the bottom of the cooling cavity 9; the coolant inside the cooling cavity 9 can be cooled by the provided refrigerator 4 and evaporator 5, and at the same time, the temperature sensor 10 can detect the temperature of the coolant inside the cooling cavity 9. When the temperature exceeds the set value, the refrigerator 4 starts, and when it drops to the required temperature, the refrigerator 4 shuts down.

[0038] The working principle of the present invention is as follows: During operation, the stator assembly and the rotor assembly inside the explosion-proof inner shell 14 cooperate to rotate the motor shaft 3. When the motor shaft 3 rotates, it drives the end shaft 30 to rotate. The rotation of the end shaft 30 drives the second conical friction roller 17 to rotate. The rotation of the second conical friction roller 17 drives the friction round belt 23 to operate. The operation of the friction round belt 23 drives the first conical friction roller 6 to rotate. The rotation of the first conical friction roller 6 drives the impeller inside the pump housing 7 to rotate. When the impeller inside the pump housing 7 rotates, the impeller inside the pump housing 7 pumps the coolant inside the cooling cavity 9 from the suction pipe 19 to the output pipe 27, then enters the infusion pipe 26, and then is transported to the connection joint 8. When cooling the motor shaft 3, the coolant flows in from the communication hole 38 at one end of the communication channel 11, then enters the communication channel 11, enters the heat exchange channel 37 through the communication channel 11, and then discharges from the communication hole 38 at one end of the heat exchange channel 37. When the coolant flows through the communication channel 11 and the heat exchange channel 37, heat exchange occurs between the coolant and the motor shaft 3, thereby taking away the heat on the motor shaft 3 and realizing the cooling of the motor shaft 3. Through the provided adjustment assembly, during operation, the rotation speed of the impeller inside the pump housing 7 can be automatically adjusted according to the rotation speed of the motor. When the motor runs at a low speed, the pump housing 7 rotates only to supply coolant to the inside of the motor shaft 3. When the motor shaft 3 runs at a high speed, the adjustment assembly drives the L-shaped support rod 28 to move towards the fixed side plate 18, changing the transmission ratio between the end shaft 30 and the drive shaft 29, so that the impeller inside the pump housing 7 runs at a high speed to increase the power. At the same time, the end block of the L-shaped support rod 28 touches the limit switch 40 to open the solenoid valve 39, and then supplies liquid to both the threaded flat tube 13 and the inside of the motor shaft 3 simultaneously, realizing the simultaneous cooling of the outer shell and the motor shaft 3, and thus meeting the heat dissipation requirements of the motor during high-speed operation.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Although this specification is described according to embodiments, not every embodiment only contains one technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An explosion-proof motor with a cooling shaft structure, comprising a mounting base plate (1), an explosion-proof outer shell (2) being fixedly connected to the upper end surface of the mounting base plate (1), an explosion-proof inner shell (14) being provided at the upper end inside the explosion-proof outer shell (2), a stator assembly being provided inside the explosion-proof inner shell (14), a motor shaft (3) being rotatably connected inside the explosion-proof inner shell (14), and a rotor assembly being provided at a position of the motor shaft (3) inside the explosion-proof inner shell (14); It is characterized by: One end of the motor shaft (3) located inside the explosion-proof housing (2) is fixedly connected to an end shaft (30), and one end of the end shaft (30) away from the motor shaft (3) is fixedly connected to a hexagonal shaft (31); a heat exchange channel (37) is provided inside the motor shaft (3); a connecting channel (11) is provided inside the end shaft (30); the connecting channel (11) passes through the motor shaft (3) and is connected to the heat exchange channel (37); the ends of the heat exchange channel (37) and the connecting channel (11) are both provided with connecting holes (38); the motor shaft (3) and the end shaft (30) are both provided with connecting joints (8) at the positions of the connecting holes (38); the lower end of the connecting joint (8) on the motor shaft (3) is connected to a liquid return pipe (15); one side of the connecting joint (8) on the end shaft (30) is connected to a liquid infusion pipe (26); and a cold shaft component for conveying cooling liquid into the connecting channel (11) is provided inside the explosion-proof housing (2); The cold shaft assembly comprises a pump housing (7), wherein the pump housing (7) is arranged below the connecting joint (8), a cooling chamber (9) is arranged at the lower end of the explosion-proof housing (2), the cooling chamber (9) is filled with a coolant, a water inlet of the pump housing (7) is connected to a suction pipe (19), the suction pipe (19) and the liquid return pipe (15) both extend into the cooling chamber (9), an outlet end of the pump housing (7) is connected to an output pipe (27), the output pipe (27) is communicated with a liquid infusion pipe (26), an impeller is arranged inside the pump housing (7), and a drive assembly for driving the impeller inside the pump housing (7) is also arranged inside the explosion-proof housing (2); The driving assembly comprises a second conical friction roller (17), the second conical friction roller (17) being fixedly connected to the end shaft (30), a fixed side plate (18) being fixedly connected to one side of the interior of the explosion-proof housing (2), a driving shaft (29) being rotatably connected to the fixed side plate (18), the driving shaft (29) being fixedly connected to the impeller shaft inside the pump housing (7), a first conical friction roller (6) being fixedly connected to the driving shaft (29), a friction circular belt (23) for transmission being provided between the two first conical friction rollers (6), and an adjustment assembly for adjusting the position of the friction circular belt (23) being provided on the hexagonal shaft (31); The adjustment component comprises a fixed ring (32), the fixed ring (32) being fixedly connected to one end of the hexagonal shaft (31) away from the end shaft (30), the hexagonal shaft (31) being slidably connected to a sliding ring (35), the sliding ring (35) being rotatably connected to a second connecting rod (22), the fixed ring (32) being rotatably connected to a first connecting rod (21), the second connecting rod (22) and the first connecting rod (21) being rotatably connected at one end opposite to the second connecting rod (22), the end of the second connecting rod (22) being also fixedly connected to a counterweight (20), a spring (33) being inserted through a position of the hexagonal shaft (31) between the sliding ring (35) and the fixed ring (32), and the sliding ring (35) being also provided with a pushing component for pushing the friction circular belt (23) to move.

2. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: The connecting joint (8) comprises an annular cover (81), bearings (83) are provided at both ends of the annular cover (81), and sealing rings (82) are provided inside the annular cover (81) at positions close to the bearings (83).

3. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: The pushing assembly comprises a rotating ring (34), the rotating ring (34) being rotatably connected in a ring groove on the surface of a sliding ring (35), an L-shaped support rod (28) being fixedly connected to the lower end of the rotating ring (34), the L-shaped support rod (28) being slidably connected to a fixed side plate (18), and two limiting rotating rods (36) for limiting the friction circular belt (23) being rotatably connected to both sides of one end of the L-shaped support rod (28) away from the rotating ring (34).

4. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: The explosion-proof inner shell (14) is also provided with a cold shell component for further reducing the internal heat of the explosion-proof inner shell (14).

5. The explosion-proof motor with a cooling shaft structure according to claim 4, characterized in that: The cold shell assembly comprises a threaded flat tube (13), the threaded flat tube (13) being embedded in the surface of the explosion-proof inner shell (14), one end of the threaded flat tube (13) being connected to a liquid inlet pipe (25), the liquid inlet pipe (25) being in communication with an outlet pipe (27), the other end of the threaded flat tube (13) being connected to a liquid outlet pipe (12), the lower end of the liquid outlet pipe (12) extending into the interior of the cooling chamber (9), the liquid inlet pipe (25) being further provided with a solenoid valve (39), the fixed side plate (18) being provided with a limit switch (40), the limit switch (40) being electrically connected to the solenoid valve (39).

6. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: A refrigerator (4) is installed on one side of the explosion-proof housing (2); an evaporator (5) of the refrigerator (4) is arranged inside a cooling chamber (9); and a temperature sensor (10) is also arranged at the bottom of the cooling chamber (9).

7. The explosion-proof motor with a cooling shaft structure according to claim 2, characterized in that: The annular cover (81) and the pump housing (7) are both provided with a support seat (16) fixedly connected to the inner wall of the explosion-proof housing (2).

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