Heat dissipation device of high-speed permanent magnet synchronous motor

Abstract

The invention relates to the technical field of motor cooling devices, in particular to a heat dissipation device of a high-speed permanent magnet synchronous motor, which comprises a base, a protection structure, a mounting structure, a positioning column, a mounting hole, a motor body, a heat dissipation structure, a filtering structure and a fixing structure. The heat dissipation effect is improved, and air blown to the motor body can be filtered through the filtering structure in the heat dissipation process, so that dust in the air can be prevented from being blown to the surface of the motor body during heat dissipation, and cleanliness of the surface of the motor body is effectively guaranteed; according to the motor, the filtering assembly in the filtering structure can be quickly disassembled and assembled through the fixing structure, so that the filtering assembly in the filtering structure can be conveniently cleaned, the filtering assembly can be prevented from being blocked, the filtering efficiency is ensured, the motor body can be quickly disassembled and assembled through the mounting structure, and the motor body can be conveniently overhauled and maintained.

Description

Technical Field

[0001] The invention relates to the technical field of motor cooling devices, in particular to a heat dissipation device for a high-speed permanent magnet synchronous motor. Background Art

[0002] Permanent magnet synchronous motors have the advantages of simple structure, small size, high efficiency and high power factor. They have been used in the metallurgical industry (iron mills and sintering plants, etc.), ceramic industry (ball mills), rubber industry (internal mixers), petroleum industry (pumping units), textile industry (double twisters, spinning machines) and other industries, and have gradually accumulated design and operation experience.

[0003] However, the traditional permanent magnet synchronous motor only relies on the cooling fan at its rear to dissipate heat during use. When the ambient temperature is high, the heat dissipation effect is poor. The fan is also prone to blowing dust toward the motor when dissipating heat, making it inconvenient to clean the surface of the motor. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a heat dissipation device for a high-speed permanent magnet synchronous motor.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a heat dissipation device for a high-speed permanent magnet synchronous motor, comprising a base, a protective structure is provided on the base, a mounting structure is provided on the base, four positioning columns are fixedly connected to the base, a motor body is placed on the base, the four positioning columns are engaged with the bottom end of the motor body, a heat dissipation structure is provided on the base, a filtering structure is provided on the heat dissipation structure, and a fixing structure is provided on the heat dissipation structure;

[0006] The heat dissipation structure includes a connecting sleeve and a fan. A connecting sleeve is fixedly connected to one side of the base, a fan is installed inside the connecting sleeve, a mounting frame is installed on the connecting sleeve, a cold water pipe is fixedly connected to the mounting frame, and a filtering structure is provided on the connecting sleeve.

[0007] Specifically, the end of the cold water pipe extends to the outside of the mounting frame, the middle of the cold water pipe is in an S-shaped structure, and the cross-section of the end of the cold water pipe is in a T-shaped structure.

[0008] Specifically, the base is provided with four mounting holes, the cross section of the top end of the positioning column is a trapezoidal structure, and the cross section of the base is an L-shaped structure.

[0009] Specifically, the filtering structure includes an outer frame and a filter screen. The outer frame is engaged on one side of the connecting sleeve, the filter screen is fixedly connected to the outer frame, two protrusions are fixedly connected to the side of the outer frame, a sealing gasket is engaged inside the outer frame, and the sealing gasket is in contact with the connecting sleeve.

[0010] Specifically, the end of the protrusion extends to the outside of the connecting sleeve, and the two protrusions are symmetrically distributed about the middle part of the outer frame.

[0011] Specifically, the fixed structure includes a swivel and a stop block. The connecting sleeve is rotatably connected to the swivel, and two stop blocks are fixedly connected to the swivel, and the stop blocks are in contact with the protrusions. Two handles are fixedly connected to the swivel, and the handles are slidably connected to an insertion rod. The connecting sleeve is provided with four slots, and the insertion rod is engaged with adjacent slots. A second spring is provided inside the handle, and one end of the second spring is fixedly connected to the insertion rod, and the other end of the second spring is fixedly connected to the handle.

[0012] Specifically, the cross section of one end of the insertion rod is in a T-shaped structure, and the cross section of the stop block is in an L-shaped structure.

[0013] Specifically, the mounting structure includes a pull plate and a cross bar, the pull plate is slidably connected to the base, one end of the pull plate is fixedly connected to a connecting plate, two connecting rods are rotatably connected to the connecting plate, the connecting rods are rotatably connected to the slide plate, the slide plate is slidably connected to the base, a card plate is fixedly connected to the slide plate, the two card plates are in contact with the motor body, two first springs are provided inside the base, one end of the first spring is in contact with the card plate, and the other end of the first spring is in contact with the base, the pull plate is fixedly connected to a cross bar, and two card blocks are fixedly connected to the cross bar.

[0014] Specifically, the cross section of one end of the pull plate is L-shaped, the cross section of the clamping plate is L-shaped, the cross section of one end of the connecting plate is T-shaped, and the two connecting rods are symmetrically distributed about the middle of the connecting plate.

[0015] Specifically, the protective structure includes a shielding cover and a threading hole. A shielding cover is provided on the top of the base, a threading hole is provided on the shielding cover, an opening is provided on the shielding cover, a plurality of convex strips are fixedly connected to the tops of both sides of the shielding cover, two blocks are fixedly connected to the base, the blocks are in contact with the bottom end of the shielding cover, two grooves are provided on the shielding cover, the blocks are engaged with adjacent grooves, and the cross-section of the block is an L-shaped structure.

[0016] The beneficial effects of the present invention are:

[0017] (1) The heat dissipation device of a high-speed permanent magnet synchronous motor described in the present invention can achieve efficient and rapid heat dissipation of the motor body through the heat dissipation structure, thereby improving the heat dissipation effect, and can filter the air blown to the motor body through the filtering structure during the heat dissipation process, thereby preventing dust in the air from being blown to the surface of the motor body during heat dissipation, thereby effectively ensuring the cleanliness of the surface of the motor body.

[0018] (2) The heat dissipation device of a high-speed permanent magnet synchronous motor described in the present invention can realize the rapid disassembly and assembly of the filter component inside the filter structure through the fixed structure, thereby facilitating the cleaning of the filter component inside the filter structure. By regularly cleaning the filter component, the filter component can be prevented from being blocked, thereby ensuring the filtering efficiency.

[0019] (3) The heat dissipation device of a high-speed permanent magnet synchronous motor described in the present invention can shield and protect the motor body through a protective structure, thereby preventing the motor body from being damaged by impact, thereby effectively improving the safety of use. The motor body can be quickly disassembled and assembled through the installation structure, thereby facilitating the inspection and maintenance of the motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a heat dissipation device for a high-speed permanent magnet synchronous motor provided by the present invention;

[0022] Figure 2 It is a schematic diagram of the connection structure between the connection cover and the fan of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure between the sealing gasket and the outer frame of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection structure between the base and the positioning column of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection structure between the connecting plate and the connecting rod of the present invention;

[0026] Figure 6 It is a schematic diagram of the connection structure between the rotating ring and the handle of the present invention.

[0027] In the figure: 1. base; 2. protective structure; 201. shielding cover; 202. convex strip; 203. threading hole; 204. opening; 205. groove; 206. block; 3. mounting structure; 301. pull plate; 302. connecting plate; 303. connecting rod; 304. slide plate; 305. clamping plate; 306. first spring; 307. cross bar; 308. clamping block; 4. positioning column; 5. mounting hole; 6. motor body; 7. heat dissipation structure; 701. connecting sleeve; 702. fan; 703. mounting frame; 704. cold water pipe; 8. filtering structure; 801. outer frame; 802. filter screen; 803. convex block; 804. sealing gasket; 9. fixing structure; 901. swivel; 902. block; 903. handle; 904. plug-in rod; 905. second spring; 906. slot. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a heat dissipation device for a high-speed permanent magnet synchronous motor described in the present invention comprises a base 1, a protective structure 2 is provided on the base 1, a mounting structure 3 is provided on the base 1, four positioning columns 4 are fixedly connected to the base 1, a motor body 6 is placed on the base 1, the four positioning columns 4 are engaged with the bottom ends of the motor body 6, a heat dissipation structure 7 is provided on the base 1, a filtering structure 8 is provided on the heat dissipation structure 7, and a fixing structure 9 is provided on the heat dissipation structure 7;

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the heat dissipation structure 7 includes a connecting sleeve 701 and a fan 702. The connecting sleeve 701 is fixedly connected to one side of the base 1, and the fan 702 is installed inside the connecting sleeve 701. A mounting frame 703 is installed on the connecting sleeve 701, and a cold water pipe 704 is fixedly connected to the mounting frame 703. A filtering structure 8 is provided on the connecting sleeve 701. The end of the cold water pipe 704 extends to the outside of the mounting frame 703. The middle part of the cold water pipe 704 is an S-shaped structure, and the cross-section of the end of the cold water pipe 704 is a T-shaped structure. The base 1 is provided with four mounting holes 5, the cross section of the top of the positioning column 4 is a trapezoidal structure, the cross section of the base 1 is an L-shaped structure, the filtering structure 8 includes an outer frame 801 and a filter screen 802, one side of the connecting sleeve 701 is engaged with the outer frame 801, the filter screen 802 is fixedly connected to the outer frame 801, and the side of the outer frame 801 is fixedly connected with two protrusions 803, the inner part of the outer frame 801 is engaged with a sealing gasket 804, the sealing gasket 804 is in conflict with the connecting sleeve 701, and the end of the protrusion 803 extends to the connecting sleeve 701. On the outside of the connecting sleeve 701, the two protrusions 803 are symmetrically distributed about the middle part of the outer frame 801, that is, during use, the external cold transport circulation pipeline can be connected to the end of the cold water pipe 704. When the connection is completed, the cold water can circulate inside the cold water pipe 704, and then the fan 702 can be started. Under the action of the fan 702, the air will enter the inside of the connecting sleeve 701. In the process of the air passing through the filter 802, the dust in the air can be filtered by the filter 802, so as to avoid blowing the dust to the surface of the motor body 6, thereby ensuring the cleanliness of the surface of the motor body 6. The air filtered by the filter 802 will contact the outer wall of the cold water pipe 704 during the flow. Since the temperature of the outer wall of the cold water pipe 704 is relatively low, the air can be cooled, thereby turning the hot air into cold air. When the cold air flows through the motor body 6, it will take away the heat on the surface of the motor body 6, thereby playing a role in heat dissipation of the motor body 6. Since the temperature of the air is relatively low, the heat dissipation effect is better, thereby effectively improving the heat dissipation effect.

[0031] Specifically, Figure 1 , Figure 2 and Figure 6As shown, the fixed structure 9 includes a swivel 901 and a stopper 902. The swivel 901 is rotatably connected to the connecting sleeve 701. Two stoppers 902 are fixedly connected to the swivel 901, and the stoppers 902 abut against the protrusion 803. Two handles 903 are fixedly connected to the swivel 901. A plug rod 904 is slidably connected to the handle 903. Four slots 906 are provided on the connecting sleeve 701. The plug rods 904 are engaged with adjacent slots 906. A second spring 905 is provided inside the handle 903. One end of the second spring 905 is fixedly connected to the plug rod 904, and the other end of the second spring 905 is fixedly connected to the handle 903. The cross-section of one end of the plug rod 904 is a T-shaped structure, and the cross-section of the stopper 902 is an L-shaped structure, that is, when the filter screen 802 needs to be disassembled and cleaned, the two plug rods 904 can be pulled at the same time. 04, the insertion rod 904 moves away from the slot 906, and the second spring 905 extends. When the end of the insertion rod 904 is not engaged with the slot 906, the two handles 903 can be held to rotate the rotating ring 901, and the rotation of the rotating ring 901 drives the stop block 902 to rotate. In the process of rotating the handle 903, the end of the insertion rod 904 will face the other slot 906. At this time, the second spring 905 will contract and drive the insertion rod 904 to move toward the other slot 906 and engage with the other slot 906. At this time, the rotating ring 901 cannot be rotated any further. Since the stop block 902 will not resist one side of the protrusion 803 at this time, the protrusion 803 can be held to remove the outer frame 801 from the connecting sleeve 701. After removal, it is convenient to clean the filter screen 802. By regularly cleaning the filter screen 802, the mesh of the filter screen 802 can be prevented from being blocked, thereby effectively ensuring the filtering efficiency.

[0032] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the mounting structure 3 includes a pull plate 301 and a cross bar 307, the base 1 is slidably connected with the pull plate 301, one end of the pull plate 301 is fixedly connected with a connecting plate 302, the connecting plate 302 is rotatably connected with two connecting rods 303, the connecting rods 303 are rotatably connected to the slide plate 304, the slide plate 304 is slidably connected to the base 1, the slide plate 304 is fixedly connected with a clamping plate 305, the two clamping plates 305 are in contact with the motor body 6, two first springs 306 are provided inside the base 1, one end of the first spring 306 is in contact with the clamping plate 305, and the other end of the first spring 306 is in contact with the base 1, the pull plate 301 is fixedly connected with a cross bar 307, the cross bar 30 7, two card blocks 308 are fixedly connected, the cross-section of one end of the pull plate 301 is L-shaped, the cross-section of the card plate 305 is L-shaped, the cross-section of one end of the connecting plate 302 is T-shaped, the two connecting rods 303 are symmetrically distributed about the middle of the connecting plate 302, the protective structure 2 includes a shielding cover 201 and a threading hole 203, the top of the base 1 is provided with a shielding cover 201, the shielding cover 201 is provided with a threading hole 203, the shielding cover 201 is provided with an opening 204, the tops of both sides of the shielding cover 201 are fixedly connected with a plurality of convex strips 202, the base 1 is fixedly connected with two blocks 206, the blocks 206 are in conflict with the bottom end of the shielding cover 201, and the shielding cover 201 is provided with a There are two grooves 205, and the block 308 is engaged with the adjacent grooves 205. The cross-section of the block 206 is L-shaped, that is, the base 1 can be installed and fixed by means of multiple mounting holes 5 in conjunction with bolts. During use, the motor body 6 can be shielded and protected by the shielding cover 201, so as to avoid the motor body 6 from being damaged by impact, thereby effectively improving the safety of use. The wires used to connect the motor body 6 can enter the inside of the shielding cover 201 through the threading hole 203. By providing multiple convex strips 202, the hand can be prevented from slipping when taking the shielding cover 201, thereby improving the stability of use. When the motor body 6 needs to be disassembled for inspection and repair, it can be done by pulling the pull plate 301. The pull plate 301 drives the connecting plate 302 to move, and the connecting plate 302 drives the two connecting rods 303 to move. The connecting rod 303 will drive the slide plate 304 to move, and the slide plate 304 will drive the card plate 305 to move away from the motor body 6. The first spring 306 contracts, and the movement of the pull plate 301 will also drive the cross bar 307 and the card block 308 to move away from the groove 205. As the connecting plate 302 continues to move, one end of the connecting plate 302 will conflict with the base. During the movement of the connecting plate 302, the connecting rod 303 will rotate with the connecting plate 302, and the angle between the two changes from the initial acute angle to a right angle, and finally to an obtuse angle. After becoming an obtuse angle, after releasing the pull plate 301, one end of the connecting plate 302 conflicts with the connecting seat 1.Therefore, the first spring 306 cannot extend to drive the slide plate 304 to move, and since the two clamping plates 305 do not resist the bottom end of the motor body 6, and the clamping block 308 does not engage with the groove 205, the shielding cover 201 can be removed from the base 1 first, and then the motor body 6 can be moved to separate the bottom end and the four positioning columns 4, and then the motor body 6 can be removed from the base 1. At this time, the motor body 6 can be quickly disassembled, thereby shortening the time for disassembling the motor body 6 and facilitating the inspection and maintenance of the motor body 6.

[0033] When the present invention is in use, the external cold transport circulation pipeline can be connected to the end of the cold water pipe 704 during use. When the connection is completed, the cold water can be allowed to circulate inside the cold water pipe 704, and then the fan 702 can be started. Under the action of the fan 702, the air will enter the interior of the connecting sleeve 701. In the process of the air passing through the filter 802, the dust in the air can be filtered by the filter 802, so as to avoid blowing the dust to the surface of the motor body 6, thereby ensuring the cleanliness of the surface of the motor body 6. The air filtered by the filter 802 will contact the outer wall of the cold water pipe 704 during the flow. Since the temperature of the outer wall of the cold water pipe 704 is relatively low, the air can be cooled, thereby turning the hot air into cold air. When the cold air flows through the motor body 6, it will take away the heat from the surface of the motor body 6, thereby playing a role in heat dissipation of the motor body 6. Moreover, since the temperature of the air is relatively low, the heat dissipation effect is better, thereby effectively improving In order to achieve the heat dissipation effect, when the filter 802 needs to be disassembled and cleaned, the two rods 904 can be pulled at the same time, and the rod 904 moves away from the slot 906, and the second spring 905 stretches. When the end of the rod 904 is not engaged with the slot 906, the two handles 903 can be held to rotate the rotating ring 901, and the rotation of the rotating ring 901 drives the block 902 to rotate. In the process of rotating the handle 903, the end of the rod 904 will face the other slot 906, and the second spring 905 will shrink. The plug rod 904 is driven to move toward another slot 906 and engage with the other slot 906. At this time, the rotating ring 901 cannot be rotated further. Since the stop block 902 will not resist one side of the protrusion 803 at this time, the protrusion 803 can be held to remove the outer frame 801 from the connecting sleeve 701. After removal, it is convenient to clean the filter screen 802. By regularly cleaning the filter screen 802, the mesh of the filter screen 802 can be prevented from being blocked, thereby effectively ensuring the filtering efficiency.

[0034] The base 1 can be installed and fixed by means of multiple mounting holes 5 in combination with bolts. During use, the motor body 6 can be shielded and protected by the shielding cover 201, so as to prevent the motor body 6 from being damaged by impact, thereby effectively improving the safety of use. The wires used to connect the motor body 6 can enter the interior of the shielding cover 201 through the threading hole 203. By providing multiple convex strips 202, it can be placed in case of hand slippage when taking the shielding cover 201, thereby improving the stability of use. When the motor body 6 needs to be disassembled and repaired, the pull plate 301 can be pulled, and the pull plate 301 drives the connecting plate 302 to move, and the connecting plate 302 drives the two connecting rods 303 to move, and the connecting rod 303 will drive the slide plate 304 to move, and the slide plate 304 will drive the card plate 305 to move away from the motor body 6, the first spring 306 contracts, and the movement of the pull plate 301 will also drive the cross bar 307 and the card block 308 to move away from the groove. When the first and second cams 305 are in a state of being moved backwards, the first spring 306 can be used to move the first and second cams 306 together, so that the first and second cams 306 can be used to move the first and second cams 306 together.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat dissipation device for a high-speed permanent magnet synchronous motor, characterized in that: The invention comprises a base (1), wherein a protective structure (2) is provided on the base (1), a mounting structure (3) is provided on the base (1), four positioning columns (4) are fixedly connected to the base (1), a motor body (6) is placed on the base (1), the four positioning columns (4) are engaged with the bottom ends of the motor body (6), a heat dissipation structure (7) is provided on the base (1), a filtering structure (8) is provided on the heat dissipation structure (7), and a fixing structure (9) is provided on the heat dissipation structure (7); The heat dissipation structure (7) comprises a connecting sleeve (701) and a fan (702); the connecting sleeve (701) is fixedly connected to one side of the base (1); the fan (702) is installed inside the connecting sleeve (701); a mounting frame (703) is installed on the connecting sleeve (701); a cold water pipe (704) is fixedly connected to the mounting frame (703); and a filtering structure (8) is provided on the connecting sleeve (701).

2. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 1, characterized in that: The end of the cold water pipe (704) extends to the outside of the mounting frame (703), the middle portion of the cold water pipe (704) is in an S-shaped structure, and the cross-section of the end of the cold water pipe (704) is in a T-shaped structure.

3. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 1, characterized in that: The base (1) is provided with four mounting holes (5), the cross section of the top end of the positioning column (4) is a trapezoidal structure, and the cross section of the base (1) is an L-shaped structure.

4. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 1, characterized in that: The filtering structure (8) comprises an outer frame (801) and a filter screen (802); the outer frame (801) is engaged with one side of the connecting sleeve (701); the filter screen (802) is fixedly connected to the outer frame (801); two protrusions (803) are fixedly connected to the side of the outer frame (801); a sealing gasket (804) is engaged inside the outer frame (801); and the sealing gasket (804) is in contact with the connecting sleeve (701).

5. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 4, characterized in that: The end of the protrusion (803) extends to the outside of the connecting sleeve (701), and the two protrusions (803) are symmetrically distributed about the middle of the outer frame (801).

6. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 4, characterized in that: The fixed structure (9) comprises a rotating ring (901) and a stopper (902); the connecting sleeve (701) is rotatably connected with the rotating ring (901); two stoppers (902) are fixedly connected with the rotating ring (901); the stoppers (902) and the protrusions (803) are in contact with each other; two handles (903) are fixedly connected with the rotating ring (901); an insertion rod (904) is slidably connected with the handles (903); four slots (906) are provided on the connecting sleeve (701); the insertion rod (904) is engaged with adjacent slots (906); a second spring (905) is provided inside the handle (903); one end of the second spring (905) is fixedly connected to the insertion rod (904); and the other end of the second spring (905) is fixedly connected to the handle (903).

7. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 6, characterized in that: The cross section of one end of the insertion rod (904) is in a T-shaped structure, and the cross section of the stop block (902) is in an L-shaped structure.

8. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 1, characterized in that: The mounting structure (3) comprises a pull plate (301) and a cross bar (307); the pull plate (301) is slidably connected to the base (1); one end of the pull plate (301) is fixedly connected to a connecting plate (302); two connecting rods (303) are rotatably connected to the connecting plate (302); the connecting rods (303) are rotatably connected to a slide plate (304); the slide plate (304) is slidably connected to the base (1); a clamping plate (305) is fixedly connected to the slide plate (304); the two clamping plates (305) are in contact with the motor body (6); two first springs (306) are arranged inside the base (1); one end of the first spring (306) is in contact with the clamping plate (305); the other end of the first spring (306) is in contact with the base (1); the pull plate (301) is fixedly connected to a cross bar (307); and two clamping blocks (308) are fixedly connected to the cross bar (307).

9. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 8, characterized in that: The cross section of one end of the pulling plate (301) is L-shaped, the cross section of the clamping plate (305) is L-shaped, the cross section of one end of the connecting plate (302) is T-shaped, and the two connecting rods (303) are symmetrically distributed about the middle of the connecting plate (302).

10. The heat dissipation device for a high-speed permanent magnet synchronous motor according to claim 9, characterized in that: The protective structure (2) comprises a shielding cover (201) and a threading hole (203); the shielding cover (201) is provided at the top of the base (1); the threading hole (203) is provided on the shielding cover (201); an opening (204) is provided on the shielding cover (201); a plurality of convex strips (202) are fixedly connected to the tops of both sides of the shielding cover (201); two stoppers (206) are fixedly connected to the base (1); the stoppers (206) are in contact with the bottom of the shielding cover (201); two grooves (205) are provided on the shielding cover (201); the clamping blocks (308) are clamped with adjacent grooves (205); and the cross section of the stoppers (206) is an L-shaped structure.

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