A motor temperature protection device for coal mine air compressor

Abstract

The present invention relates to the technical field of protection devices, and in particular to a motor temperature protection device for a coal mine air compressor. It is mainly aimed at the problem that a large amount of dust often accumulates on the surface and vents of the motor due to coal dust particles floating in the surrounding environment, which hinders the heat exchange between the surface of the motor and the surrounding air, significantly reduces the heat dissipation efficiency of the motor, increases the operating temperature of the motor, increases the risk of equipment overheating, and easily leads to a reduction in the service life of the motor. The following technical scheme is proposed: including a motor body and an electrical box arranged on the motor body, and also including a conversion mechanism, a first cleaning component and a second cleaning component arranged in the electrical box, wherein the second cleaning component works synchronously with the first cleaning component and cleans the wind hood of the motor body. The present invention can automatically cut off the power when the temperature of the motor body is too high, and at the same time clean the dust on the surface of the motor body, thereby improving the heat dissipation capacity of the motor body and ensuring the service life of the motor body.

Description

Technical Field

[0001] The invention relates to the technical field of protection devices, and in particular to a motor temperature protection device for a coal mine air compressor. Background Art

[0002] In a coal mine environment, an air compressor is a vital piece of equipment used to provide compressed air to support various operations and equipment within the mine. However, the presence of coal dust poses a challenge to the operation and maintenance of air compressors. The motor surface and vents of the air compressor often accumulate a large amount of dust due to coal dust particles floating in the surrounding environment. These tiny but hard particles will hinder the heat exchange between the motor surface and the surrounding air, significantly reducing the heat dissipation efficiency of the motor, increasing the operating temperature of the motor, increasing the risk of equipment overheating, and easily leading to a reduction in the service life of the motor. In view of this, the present invention proposes a motor temperature protection device for a coal mine air compressor. Summary of the invention

[0003] The purpose of the present invention is to propose a motor temperature protection device for a coal mine air compressor in response to the problem in the background technology that a large amount of dust often accumulates on the motor surface and vents due to coal dust particles floating in the surrounding environment, which hinders the heat exchange between the motor surface and the surrounding air, significantly reduces the heat dissipation efficiency of the motor, increases the operating temperature of the motor, increases the risk of equipment overheating, and easily leads to a reduction in the service life of the motor.

[0004] The technical solution of the present invention: a motor temperature protection device for a coal mine air compressor, comprising a motor body and an electrical box arranged on the motor body, and also comprising a conversion mechanism arranged in the electrical box, the conversion mechanism comprising a temperature probe, a circuit board, a micro push rod, an insulating block, a conductive block, and a power connection sheet, the temperature probe is arranged inside the motor body for monitoring the temperature, the circuit board electrically connected to the temperature probe is also electrically connected to the micro push rod, the output end of the micro push rod is fixedly connected to the insulating block, a conductive block is installed on one side of the insulating block, and power connection sheets are arranged on both sides of the conductive block; a first cleaning component, the first cleaning component is energized after the motor body is powered off, and the first cleaning component cleans the surface of the motor body; a second cleaning component, the second cleaning component works synchronously with the first cleaning component and cleans the wind hood of the motor body.

[0005] Optionally, the conversion mechanism further includes a fixing plate and a spring, and a fixing plate is provided on the side of the two groups of power connection plates that are away from each other, and the fixing plate is fixedly connected in the electrical box, and a spring is installed between the fixing plate and the power connection plates.

[0006] Optionally, the first cleaning assembly includes a top plate, a first servo motor, a first gear, a second gear, a rotating rod, and a positioning seat. The top plate arranged above the motor body is fixedly connected to one side of the electrical box, the first servo motor is installed on the top of the top plate, and a dust cover installed on the top of the top plate is arranged on the outside of the first servo motor. The output end of the first servo motor is fixedly connected to the first gear, and the second gear arranged below the top plate is meshed with the first gear. The second gear is fixedly connected to the rotating rod, one end of the rotating rod is rotatably connected to the side of the electrical box, and the rotating rod is rotatably connected to a positioning seat, which is fixedly connected to the bottom of the top plate.

[0007] Optionally, the first cleaning assembly further includes a threaded sleeve, an arc-shaped plate, and an arc-shaped brush. The threaded sleeve is threadedly connected to the rotating rod, the threaded sleeve is provided with an arc-shaped plate, and the arc-shaped brush is installed on one side of the arc-shaped plate close to the motor body.

[0008] Optionally, the first cleaning assembly also includes a support frame, a limit rod, and a limit sleeve. The support frame fixedly connected to the bottom of the top plate is installed on the outside of the motor body. At least two groups of limit rods are fixedly connected to the support frame. The other end of the limit rod is fixedly connected to the electrical box. Each group of limit rods is slidably connected to a limit sleeve, and the limit sleeve is installed in the arc plate.

[0009] Optionally, the second cleaning assembly includes a dust box, a first pulley, a second pulley, a transmission belt, a connecting rod, and a straight brush. The dust box is arranged on the side of the top plate away from the electrical box. The dust box is hollow and has a first pulley arranged therein. One end of the rotating rod away from the electrical box passes through one side of the dust box and is fixedly connected to the first pulley. A second pulley is also arranged in the dust box. A transmission belt is connected between the first pulley and the second pulley. The connecting rod is fixedly connected to the second pulley. The connecting rod is rotatably connected in the dust box. One end of the connecting rod passes through one side of the dust box and is fixedly connected to a straight brush.

[0010] Optionally, it also includes a mounting frame installed on one side of the dustproof box away from the motor body, and multiple sets of fans are symmetrically arranged on both sides of the mounting frame.

[0011] Optionally, a flipping mechanism for driving the dustproof box to rotate is also included.

[0012] Optionally, the flipping mechanism includes a rotating block, a positioning sleeve, and a fixed frame. The rotating block is installed on the side of the dust box close to the motor body. The cross-section of the rotating block is a T-shaped structure. The rotating block is rotatably connected to the positioning sleeve. The two sides of the positioning sleeve are symmetrically provided with fixed frames fixedly connected to the bottom of the top plate, and the rotating rod is inserted into the rotating block and the positioning sleeve.

[0013] Optionally, the flipping mechanism also includes a second servo motor, a third gear, and an arc-shaped gear ring. A second servo motor is also installed on the top plate. The output end of the second servo motor is fixedly connected to the third gear. The arc-shaped gear ring is installed on the outside of the rotating block, and the third gear is meshed with the arc-shaped gear ring.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The present invention sets a conversion mechanism. When the temperature sensing probe senses that the temperature inside the motor body is too high, the conductive block moves away from a group of power-connecting plates to automatically cut off the power. Then, the conductive block contacts another group of power-connecting plates to energize the first cleaning component, the fan, and the flip mechanism, thereby preventing the motor body from being overheated and damaged due to excessive operating temperature.

[0016] Further, through the setting of the first cleaning component, the first servo motor can drive the arc plate and the arc brush to rotate after starting, so that the coal dust attached to the surface of the motor body can be brushed off, and at the same time, the straight brush rotates to clean the surface of the wind cover of the motor body, thereby improving the heat dissipation effect of the motor body and ensuring the normal operation of the equipment;

[0017] In summary, the present invention can automatically cut off the power supply when the temperature of the motor body is too high, and at the same time clean the dust on the surface of the motor body, thereby improving the heat dissipation capacity of the motor body and ensuring the service life of the motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a motor temperature protection device for a coal mine air compressor;

[0019] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0020] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4 is a schematic diagram of the structure of the first cleaning component;

[0022] Figure 5 It is a schematic diagram of the structure of the fan;

[0023] Figure 6 is a schematic cross-sectional view of a second cleaning assembly;

[0024] Figure 7 yes Figure 2 A magnified schematic diagram of point B in the middle.

[0025] Reference numerals:

[0026] 1. Motor body; 11. Electrical box;

[0027] 2. Conversion mechanism; 21. Temperature sensor; 22. Circuit board; 23. Micro push rod; 24. Insulation block; 25. Conductive block; 26. Fixing plate; 27. Electrical connection sheet; 28. Spring;

[0028] 3. First cleaning assembly; 301. Top plate; 302. First servo motor; 303. First gear; 304. Second gear; 305. Rotating rod; 306. Positioning seat; 307. Threaded sleeve; 308. Arc plate; 309. Arc brush; 310. Support frame; 311. Limit rod; 312. Limit sleeve;

[0029] 4. Second cleaning assembly; 41. Dust box; 42. First pulley; 43. Second pulley; 44. Transmission belt; 45. Connecting rod; 46. Straight brush;

[0030] 5. Fan; 51. Mounting frame;

[0031] 6. Flipping mechanism; 61. Rotating block; 62. Positioning sleeve; 63. Fixed frame; 64. Second servo motor; 65. Third gear; 66. Arc gear ring;

[0032] 7. Dust cover. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0035] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example: Figure 1-3 As shown, the motor temperature protection device of a coal mine air compressor proposed by the present invention includes a motor body 1 and an electrical box 11 arranged on the motor body 1, which is convenient for wiring and powering on the motor body 1. It also includes a conversion mechanism 2 arranged in the electrical box 11, and the conversion mechanism 2 includes a temperature probe 21, a circuit board 22, a micro push rod 23, an insulating block 24, a conductive block 25, and a power connection sheet 27. The temperature probe 21 is arranged inside the motor body 1 for monitoring the temperature. The circuit board 22 electrically connected to the temperature probe 21 is also electrically connected to the micro push rod 23. When the temperature probe 21 detects that the temperature inside the motor body 1 is too high, it sends a signal to the circuit board 22. The output end of the micro push rod 23 is fixedly connected to the insulating block 24, and the circuit board 22 sends a signal to start the micro push rod 23 and drive the insulating block 24 to move. A conductive block 25 is installed on one side of the insulating block 24, and power-connecting plates 27 are arranged on both sides of the conductive block 25. The micro push rod 23 is used to drive the conductive block 25 to switch the contact with the two groups of power-connecting plates 27, so as to realize the power-off of the motor body 1 and the power-on of the first servo motor 302 and the third gear 65. The conversion mechanism 2 also includes a fixed plate 26 and a spring 28. The fixed plate 26 is arranged on the side where the two groups of power-connecting plates 27 are away from each other. The fixed plate 26 is fixedly connected to the electrical box 11. A spring 28 is installed between the fixed plate 26 and the power-connecting plates 27 to release the elastic force so that the conductive block 25 and the power-connecting plates 27 are closely attached.

[0039] For further information, see Figure 4The above-mentioned protection device includes a first cleaning component 3. The first cleaning component 3 is powered on after the motor body 1 is powered off, and the first cleaning component 3 cleans the surface of the motor body 1. The first cleaning component 3 includes a top plate 301, a first servo motor 302, a first gear 303, a second gear 304, a rotating rod 305, and a positioning seat 306. The top plate 301 arranged above the motor body 1 is fixedly connected to one side of the electrical box 11. The top of the top plate 301 is installed with the first servo motor 302. The outer side of the first servo motor 302 is provided with a dust cover 7 installed on the top of the top plate 301 to prevent dust from accumulating on the first servo motor 302 and affecting its service life after long-term work. The output end of the first servo motor 302 is fixedly connected with the first gear 303, and the second gear 304 arranged below the top plate 301 is meshed with the first gear 303. After the first servo motor 302 is started, it drives the first gear 303 to mesh with the second gear 304, so that the second gear 304 starts to rotate. A rotating rod 305 is fixedly connected to the second gear 304, and the rotating rod 305 rotates synchronously with the second gear 304. One end of the rotating rod 305 is rotatably connected to the side of the electrical box 11, and a positioning seat 306 is rotatably connected to the rotating rod 305. The positioning seat 306 is fixedly connected to the bottom of the top plate 301, so that the rotating rod 305 can rotate in place. The first cleaning component 3 also includes a threaded sleeve 307, an arc plate 308, and an arc brush 309. The threaded sleeve 307 is threadedly connected to the rotating rod 305. When the rotating rod 305 rotates, it drives the threaded sleeve 307 to move along the length direction of the rotating rod 305. The threaded sleeve 307 is provided with an arc plate 308, and an arc brush 309 is installed on the side of the arc plate 308 close to the motor body 1. The arc plate 308 moves synchronously with the threaded sleeve 307, and at the same time drives the arc brush 309 to move and contact with the surface of the motor body 1, and sweeps off the dust on the surface of the motor body 1. The first cleaning assembly 3 also includes a support frame 310, a limiting rod 311, and a limiting sleeve 312. The support frame 310 fixedly connected to the bottom of the top plate 301 is installed on the outside of the motor body 1, so that the position of the top plate 301 is stable. At least two groups of limiting rods 311 are fixedly connected to the support frame 310, and the other ends of the limiting rods 311 are fixedly connected to the electrical box 11, and the positions of the limiting rods 311 are fixed. Each group of limiting rods 311 is slidably connected to a limiting sleeve 312, and the limiting sleeve 312 is installed in the arc plate 308, which is used to limit the arc plate 308 when it moves, so that the arc plate 308 moves smoothly.

[0040] Furthermore, if Figure 4 and Figure 6As shown, the protective device further includes a second cleaning component 4, which works synchronously with the first cleaning component 3 and cleans the wind shield of the motor body 1. The second cleaning component 4 includes a dust box 41, a first pulley 42, a second pulley 43, a transmission belt 44, a connecting rod 45, and a straight brush 46. The dust box 41 is arranged on the side of the top plate 301 away from the electrical box 11. The dust box 41 is hollow and the first pulley 42 is arranged therein. The end of the rotating rod 305 away from the electrical box 11 passes through one side of the dust box 41 and is fixedly connected to the first pulley 42. When the rotating rod 305 rotates, it drives the first pulley 42 to rotate synchronously. A second pulley 43 is also arranged in the dust box 41. A transmission belt 44 is connected between the first pulley 42 and the second pulley 43. When the first pulley 42 rotates, it drives the second pulley 43 to rotate synchronously through the transmission belt 44. The connecting rod 45 is fixedly connected to the second pulley 43, and the connecting rod 45 is rotatably connected to the dust box 41, so that the second pulley 43 keeps rotating in place. One end of the connecting rod 45 passes through one side of the dust box 41 and is fixedly connected with a straight brush 46. When the second pulley 43 rotates, the straight brush 46 is driven to rotate through the connecting rod 45, so that the straight brush 46 cleans the air cover of the motor body 1, removes most of the dust, and facilitates air flow to dissipate heat for the motor body 1.

[0041] The above-mentioned protection device also includes a mounting bracket 51 installed on the side of the dust box 41 away from the motor body 1. Multiple sets of fans 5 are symmetrically arranged on both sides of the mounting bracket 51 to drive air flow and blow away the dust after it is swept down to prevent the dust from adhering to the motor body 1 again.

[0042] Finally, see Figure 5-7, the above-mentioned protection device also includes a flip mechanism 6 for driving the dust box 41 to rotate. The flip mechanism 6 includes a rotating block 61, a positioning sleeve 62, and a fixed frame 63. The rotating block 61 is installed on the side of the dust box 41 close to the motor body 1. The cross section of the rotating block 61 is a T-shaped structure. The rotating block 61 is rotatably connected with the positioning sleeve 62. The two sides of the positioning sleeve 62 are symmetrically provided with a fixed frame 63 fixedly connected to the bottom of the top plate 301. The fixed frame 63 fixes the position of the positioning sleeve 62, so that the rotating block 61 keeps rotating in place, and then the dust box 41 rotates around the rotating block 61. The rotating rod 305 is inserted into the rotating block 61 and the positioning sleeve 62, and does not hinder the rotation of the rotating rod 305. The flip mechanism 6 also includes a second servo motor 64, a third gear 65, and an arc-shaped gear ring 66. The second servo motor 64 is also installed on the top plate 301. The output end of the second servo motor 64 is fixedly connected with the third gear 65. After the second servo motor 64 is started, it drives the third gear 65 to rotate. The arc-shaped gear ring 66 is installed on the outside of the rotating block 61, and the third gear 65 is meshed with the arc-shaped gear ring 66. When the third gear 65 rotates, it drives the arc-shaped gear ring 66 to rotate, thereby realizing the rotation of the rotating block 61, and then drives the dust box 41 to rotate, so that the dust box 41 can be moved away from the position directly opposite the wind cover of the motor body 1, so as to facilitate normal heat dissipation of the motor body 1 during operation.

[0043] In this embodiment, first, when the temperature sensing probe 21 senses that the temperature inside the motor body 1 is too high, the circuit board 22 starts the micro push rod 23 after receiving the signal from the temperature sensing probe 21, and at the same time, the output end of the micro push rod 23 extends, driving the insulating block 24 to move. At this time, the insulating block 24 drives the conductive block 25 to move synchronously and makes the conductive block 25 move away from one set of power connection plates 27 and fit with another set of power connection plates 27. At this time, the motor body 1 is powered off and stops running, but the cooling fan in the motor body 1 continues to work, and at the same time, the first servo motor 302, the second servo motor 64 and the fan 5 are all powered on.

[0044] At this time, the second servo motor 64 starts to drive the third gear 65 to rotate, so that the third gear 65 engages with the arc gear ring 66 to drive the arc gear ring 66 to rotate. When the arc gear ring 66 rotates, it drives the rotating block 61 to rotate, and at the same time, the dust box 41 rotates to the corresponding position of the wind cover of the motor body 1, and then the second servo motor 64 stops working. At this time, the first servo motor 302 starts and drives the first gear 303 to rotate, and at the same time, the second gear 304 engaged with the first gear 303 starts to rotate synchronously. The second gear 304 drives the rotating rod 305 installed therein to rotate, and the rotating rod 305 rotates smoothly under the limiting action of the positioning seat 306 and the electrical box 11. At this time, since the threaded sleeve 307 and the limiting sleeve 312 are fixedly set in the arc plate 308, the arc plate 308 moves smoothly under the limiting action of the limiting rod 311 and the limiting sleeve 312. Therefore, when the rotating rod 305 rotates, it can only drive the threaded sleeve 307 to move along the length direction of the rotating rod 305, that is, the arc plate 308 moves smoothly. At the same time, the arc brush 309 is driven to clean the outer surface of the motor body 1, so that the surface of the motor body 1 is in contact with the air, thereby improving the heat dissipation effect. At the same time, the first servo motor 302 can also rotate in the reverse direction to achieve the reverse movement of the arc plate 308, thereby achieving the reciprocating movement of the arc brush 309 on the surface of the motor body 1, thereby improving the cleaning effect.

[0045] At the same time, when the rotating rod 305 rotates, the first pulley 42 rotates synchronously, and the first pulley 42 drives the second pulley 43 to rotate synchronously through the transmission belt 44. At this time, the second pulley 43 drives the straight brush 46 to rotate through the connecting rod 45. When the straight brush 46 rotates, it contacts the wind cover of the motor body 1 and sweeps off the dust attached to it. At the same time, the heat dissipation fan in the motor body 1 blows out the flying dust, and through the setting of the fan 5, the fan 5 further prevents the flying dust from entering the inside of the motor body 1 after starting. And according to the conversion of the rotation direction of the rotating rod 305, the straight brush 46 performs reverse cleaning synchronously to improve the cleaning effect. Therefore, after removing the dust attached to the outside of the motor body 1, the heat dissipation effect of the motor body 1 is effectively improved, helping the overheated motor body 1 to dissipate heat quickly, and at the same time avoiding the motor body 1 from reaching an overheating state again in a short time after the heat is dissipated and restarting again, which effectively extends the service life of the motor body 1.

[0046] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A motor temperature protection device for a coal mine air compressor, comprising a motor body (1) and an electrical box (11) arranged on the motor body (1), characterized in that: Also includes: a conversion mechanism (2) disposed in the electrical box (11), the conversion mechanism (2) comprising a temperature sensing probe (21), a circuit board (22), a micro push rod (23), an insulating block (24), a conductive block (25), and an electrical connection sheet (27); the temperature sensing probe (21) is disposed inside the motor body (1) for monitoring temperature; the circuit board (22) electrically connected to the temperature sensing probe (21) is also electrically connected to the micro push rod (23); an output end of the micro push rod (23) is fixedly connected to the insulating block (24); a conductive block (25) is mounted on one side of the insulating block (24); and electrical connection sheets (27) are provided on both sides of the conductive block (25); a first cleaning component (3), the first cleaning component (3) being powered on after the motor body (1) is powered off, and the first cleaning component (3) cleaning the surface of the motor body (1); A second cleaning component (4), the second cleaning component (4) works synchronously with the first cleaning component (3) and cleans the wind shield of the motor body (1).

2. The motor temperature protection device for a coal mine air compressor according to claim 1, characterized in that: The conversion mechanism (2) further comprises a fixing plate (26) and a spring (28); a fixing plate (26) is provided on the side of the two groups of power connection plates (27) that are away from each other; the fixing plate (26) is fixedly connected in the electrical box (11); and a spring (28) is installed between the fixing plate (26) and the power connection plates (27).

3. The motor temperature protection device for a coal mine air compressor according to claim 1, characterized in that: The first cleaning assembly (3) comprises a top plate (301), a first servo motor (302), a first gear (303), a second gear (304), a rotating rod (305), and a positioning seat (306); the top plate (301) disposed above the motor body (1) is fixedly connected to one side of the electrical box (11); the first servo motor (302) is mounted on the top of the top plate (301); and a dust cover (7) mounted on the top of the top plate (301) is disposed on the outside of the first servo motor (302). The output end of the first servo motor (302) is fixedly connected to a first gear (303), and a second gear (304) arranged below the top plate (301) is meshed with the first gear (303). A rotating rod (305) is fixedly connected to the second gear (304), one end of the rotating rod (305) is rotatably connected to the side of the electrical box (11), and a positioning seat (306) is rotatably connected to the rotating rod (305), and the positioning seat (306) is fixedly connected to the bottom of the top plate (301).

4. The motor temperature protection device for a coal mine air compressor according to claim 3 is characterized in that: The first cleaning assembly (3) further comprises a threaded sleeve (307), an arc-shaped plate (308), and an arc-shaped brush (309); the threaded sleeve (307) is threadedly connected to the rotating rod (305); the threaded sleeve (307) is provided with an arc-shaped plate (308); and the arc-shaped brush (309) is installed on a side of the arc-shaped plate (308) close to the motor body (1).

5. The motor temperature protection device for a coal mine air compressor according to claim 4, characterized in that: The first cleaning component (3) further comprises a support frame (310), a limiting rod (311), and a limiting sleeve (312); the support frame (310) fixedly connected to the bottom of the top plate (301) is mounted on the outside of the motor body (1); at least two groups of limiting rods (311) are fixedly connected to the support frame (310); the other ends of the limiting rods (311) are fixedly connected to the electrical box (11); each group of limiting rods (311) is slidably connected to a limiting sleeve (312); and the limiting sleeve (312) is mounted in the arc plate (308).

6. The motor temperature protection device for a coal mine air compressor according to claim 3, characterized in that: The second cleaning assembly (4) comprises a dust box (41), a first pulley (42), a second pulley (43), a transmission belt (44), a connecting rod (45), and a straight brush (46). The dust box (41) is arranged on a side of the top plate (301) away from the electrical box (11). The dust box (41) is hollow and has a first pulley (42) arranged therein. One end of the rotating rod (305) away from the electrical box (11) passes through one side of the dust box (41) and is fixedly connected to the first pulley (42). A second pulley (43) is also arranged in the dust box (41). A transmission belt (44) is connected between the first pulley (42) and the second pulley (43). The connecting rod (45) is fixedly connected to the second pulley (43). The connecting rod (45) is rotatably connected to the dust box (41). One end of the connecting rod (45) passes through one side of the dust box (41) and is fixedly connected to the straight brush (46).

7. A motor temperature protection device for a coal mine air compressor according to claim 6, characterized in that: It also comprises a mounting frame (51) mounted on one side of the dustproof box (41) away from the motor body (1), and a plurality of sets of fans (5) are symmetrically arranged on both sides of the mounting frame (51).

8. The motor temperature protection device for a coal mine air compressor according to claim 6, characterized in that: It also includes a turning mechanism (6) for driving the dustproof box (41) to rotate.

9. A motor temperature protection device for a coal mine air compressor according to claim 8, characterized in that: The flip mechanism (6) comprises a rotating block (61), a positioning sleeve (62), and a fixing frame (63); the rotating block (61) is mounted on a side of the dustproof box (41) close to the motor body (1); the cross section of the rotating block (61) is a T-shaped structure; the positioning sleeve (62) is rotatably connected to the rotating block (61); the fixing frames (63) fixedly connected to the bottom of the top plate (301) are symmetrically arranged on both sides of the positioning sleeve (62); and the rotating rod (305) is inserted into the rotating block (61) and the positioning sleeve (62).

10. A motor temperature protection device for a coal mine air compressor according to claim 9, characterized in that: The flip mechanism (6) further comprises a second servo motor (64), a third gear (65), and an arcuate gear ring (66). The top plate (301) is further mounted with a second servo motor (64). The output end of the second servo motor (64) is fixedly connected to the third gear (65). The arcuate gear ring (66) is mounted on the outside of the rotating block (61), and the third gear (65) is meshed with the arcuate gear ring (66).

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