CN221748083U - Dustproof permanent magnet synchronous motor - Google Patents

Abstract

The present application relates to a dustproof permanent magnet synchronous motor, and relates to the field of motors, which includes a motor body and a dustproof component, wherein the motor body includes a housing, a stator, a rotating shaft and a rotor, wherein the stator is fixedly connected in the housing, the rotating shaft is coaxially rotatably connected with the housing, and the rotor is coaxially fixedly connected with a section of the rotating shaft located in the housing; the dustproof component is located at the rear end of the housing, and the dustproof component includes a rear end cover and a cleaning member, wherein the rear end cover is arranged at the rear end of the housing, and a plurality of evenly distributed heat dissipation holes are provided through the side of the rear end cover away from the housing, and one end of the rotating shaft extends into the rear end cover, and the cleaning member is connected to one end of the rotating shaft extending into the rear end cover, and the cleaning member is used to clean the dust in the heat dissipation hole. The present application facilitates the cleaning member to clean the dust accumulated in the heat dissipation hole by driving the cleaning member through the rotating shaft, and at the same time enables the permanent magnet synchronous motor to maintain a good heat dissipation and dustproof effect.

Description

A dust-proof permanent magnet synchronous motor

Technical Field

The present application relates to the field of motors, and in particular to a dustproof permanent magnet synchronous motor.

Background Art

The permanent magnet synchronous motor is composed of a stator, a rotor, and an end cover. The stator is basically the same as an ordinary induction motor, and a laminated structure is used to reduce the iron loss of the motor during operation. The rotor can be made solid or laminated. The armature winding can be a concentrated full-pitch winding, or a distributed short-pitch winding and an unconventional winding. The permanent magnet synchronous motor uses permanent magnets to provide excitation, which makes the motor structure simpler, reduces the processing and assembly costs, and eliminates the collector rings and brushes that are prone to problems, thereby improving the reliability of the motor operation; and because no excitation current is required, there is no excitation loss, which improves the efficiency and power density of the motor. Therefore, permanent magnet synchronous motors are widely used in various electrical equipment.

In the related art, the dust-proof device for the permanent magnet synchronous motor is generally provided by setting a dust cover at the rear end of the motor. In order to ensure a good heat dissipation effect of the motor, heat dissipation holes are usually opened on the dust cover.

However, after the motor has been working for a long time, a lot of dust will accumulate on the dust cover, which can easily block the heat dissipation holes, thereby affecting the heat dissipation effect of the permanent magnet synchronous motor.

Utility Model Content

In order to facilitate the cleaning of dust accumulated on the dust cover, the present application provides a dustproof permanent magnet synchronous motor.

The dust-proof permanent magnet synchronous motor provided in this application adopts the following technical solution:

A dustproof permanent magnet synchronous motor comprises a motor body and a dustproof assembly, wherein the motor body comprises a housing, a stator, a rotating shaft and a rotor, wherein the stator is fixedly connected in the housing, the rotating shaft is coaxially rotatably connected with the housing, both ends of the rotating shaft extend outside the housing, the rotor is located in the housing, and the rotor is coaxially fixedly connected with a section of the rotating shaft located in the housing;

The dustproof component is located at the rear end of the shell, and the dustproof component includes a rear end cover and a cleaning piece. The rear end cover is arranged at the rear end of the shell, and a plurality of evenly distributed heat dissipation holes are penetrated through the side of the rear end cover away from the shell. One end of the rotating shaft extends into the rear end cover, and the cleaning piece is connected to one end of the rotating shaft extending into the rear end cover, and the cleaning piece is used to clean dust in the heat dissipation holes.

By adopting the above technical solution, when the permanent magnet synchronous motor is working, the rear end cover located at the rear end of the shell can provide dust protection for the motor, and the heat dissipation holes opened can ensure good heat dissipation effect of the permanent magnet synchronous motor during operation. During the operation of the permanent magnet synchronous motor, the shaft drives the cleaning part in the rear end cover to rotate, thereby cleaning the dust accumulated in the heat dissipation holes, thereby preventing the accumulated dust from clogging the heat dissipation holes, thereby avoiding affecting the heat dissipation effect of the motor. The cleaning part is driven by the shaft to clean the dust accumulated in the heat dissipation holes, without the need for other external equipment, which simplifies the structure of the motor and enables the permanent magnet synchronous motor to maintain good heat dissipation and dust prevention effects.

Optionally, the cleaning member includes a cleaning disk and bristles, the cleaning disk and one end of the rotating shaft extending into the rear end cover are coaxially connected, a plurality of bristles are provided, and the bristles are fixedly connected to the cleaning disk on one side facing the heat dissipation hole.

By adopting the above technical solution, when the permanent magnet synchronous motor is working, the rotating shaft drives the cleaning disk to rotate, and the cleaning disk drives the bristles to clean the heat dissipation holes when it rotates, thereby cleaning away the dust accumulated in the heat dissipation holes. The cleaning piece of the above structure has the advantages of simple structure and good cleaning effect.

Optionally, the cleaning disc is coaxially provided with a center hole, and the cleaning disc is sleeved on the rotating shaft through the center hole. The rotating shaft is located on both sides of the cleaning disc and is threadedly connected with nuts for fixing the cleaning disc.

By adopting the above technical solution, the cleaning disc is sleeved on the rotating shaft through the center hole and then fixed by a nut, which makes it easy to install and disassemble the cleaning disc, thereby facilitating the inspection and replacement of the cleaning parts, effectively improving the convenience of the motor during use.

Optionally, a section of the rotating shaft extending into the rear end cover is coaxially fixedly connected with a fan blade on a side facing away from the cleaning disk.

By adopting the above technical solution, the fan blades are driven to rotate during the rotation of the shaft. When the fan blades rotate, air is blown toward one side of the rear end cover, thereby blowing the dust swept away by the bristles out of the rear end cover, preventing the swept dust from falling into the rear end cover, which is beneficial for the rear end cover to maintain a better dust-proof effect.

Optionally, the cleaning disk is provided with a plurality of ventilation holes which are evenly spaced apart.

By adopting the above technical solution, the ventilation holes can be opened to avoid the cleaning disk from obstructing the airflow generated by the fan blades, thereby facilitating the fan blades to fully blow the cleaned dust out of the rear end cover.

Optionally, a plurality of heat sinks evenly spaced apart are provided on the outer wall of the shell along the circumference of the rotating shaft, a guide groove is formed between two adjacent heat sinks, a plurality of guide holes are opened at one end of the rear end cover close to the shell, and the guide grooves are connected to the guide holes on the rear end cover one by one.

By adopting the above technical solution, when the fan blades blow air toward the rear end cover, negative pressure is formed inside the rear end cover, and the external cold air flows into the guide hole through the guide groove, thereby accelerating the air circulation outside the shell, which is conducive to ensuring a good heat dissipation effect. At the same time, the heat sink is conducive to guiding the heat in the shell to circulate outward, thereby further enhancing the heat dissipation effect of the motor.

Optionally, the heat sink is bent in an S shape along the length direction.

By adopting the above technical solution, the S-shaped bent heat sink can have a larger heat dissipation area, thereby maintaining a good heat dissipation effect, and the S-shaped guide groove formed by the heat sink can increase the flow path of the cold air in the guide groove, thereby extending the contact time between the cold air and the shell, further improving the heat dissipation effect of the motor.

Optionally, a plurality of heat dissipation exhaust holes are formed on an end surface of the shell body close to the rear end cover, and a plurality of heat dissipation air inlet holes are formed on an end surface of the shell body away from the rear end cover.

By adopting the above technical solution, when the fan blades blow air toward the rear end cover, negative pressure is formed inside the rear end cover, and the external cold air enters the shell through the heat dissipation air inlet hole at one end of the shell to cool the motor body, and then the cooled air is discharged into the rear end cover through the heat dissipation exhaust hole at the other end, and then discharged through the heat dissipation hole. The continuous cycle of the above process is conducive to fully cooling the inside of the motor body, thereby ensuring that the motor has a good cooling and heat dissipation effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The present application provides a cleaning piece. When the permanent magnet synchronous motor is working, the rotating shaft drives the cleaning disc to rotate. When the cleaning disc rotates, the bristles are driven to clean the heat dissipation holes, so that the dust accumulated in the heat dissipation holes can be cleaned. The cleaning piece is driven by the rotating shaft to clean the dust accumulated in the heat dissipation holes. No other external equipment is required, which simplifies the structure of the motor and enables the permanent magnet synchronous motor to maintain good heat dissipation and dust prevention effects.

2. The present application provides a fan blade, which drives the fan blade to rotate during the rotation of the shaft. When the fan blade rotates, it blows air toward one side of the rear end cover, thereby blowing the dust swept by the bristles out of the rear end cover, preventing the swept dust from falling into the rear end cover, thereby facilitating the rear end cover to maintain a good dustproof effect;

3. The present application sets an S-shaped bent heat sink, which can have a larger heat dissipation area, thereby maintaining a good heat dissipation effect, and the S-shaped guide groove formed by the heat sink can increase the flow path of the cold air in the guide groove, thereby prolonging the contact time between the cold air and the shell, further improving the heat dissipation effect of the motor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG2 is a cross-sectional view of an embodiment of the present application;

FIG. 3 is a schematic diagram of the exploded structure of the rotating shaft and the cleaning member according to an embodiment of the present application.

Figure numerals: 1. motor body; 11. shell; 111. heat dissipation air inlet hole; 112. heat dissipation exhaust hole; 113. heat sink; 1131. guide groove; 12. stator; 13. rotating shaft; 131. nut; 132. fan blade; 14. rotor; 2. dustproof component; 21. rear end cover; 211. heat dissipation hole; 212. guide hole; 22. cleaning piece; 221. cleaning plate; 2211. center hole; 2212. ventilation hole; 222. bristles.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-3.

The embodiment of the present application discloses a dustproof permanent magnet synchronous motor. Referring to FIG1 and FIG2 , the dustproof permanent magnet synchronous motor comprises a motor body 1 and a dustproof component 2 .

1 and 2 , the motor body 1 includes a housing 11, a stator 12, a rotating shaft 13 and a rotor 14. The stator 12 is fixedly connected to the inner wall of the housing 11, the rotating shaft 13 is coaxially fixedly connected to the housing 11, both ends of the rotating shaft 13 extend outside the housing 11, and the rotor 14 and the rotating shaft 13 are coaxially fixedly connected at a section located inside the housing 11.

1 and 2, the dustproof assembly 2 is located at the rear end of the housing 11, and the dustproof assembly 2 includes a rear end cover 21 and a cleaning member 22. The rear end cover 21 is coaxially arranged at the rear end of the housing 11, and the rear end cover 21 is fixedly connected to the housing 11 by screws. A plurality of evenly spaced heat dissipation holes 211 are provided on the side of the rear end cover 21 away from the housing 11. A plurality of evenly spaced heat dissipation air inlet holes 111 are provided on one end face of the housing 11 away from the rear end cover 21, and a plurality of evenly spaced heat dissipation exhaust holes 112 are provided on one end face of the housing 11 facing the rear end cover 21.

2 and 3 , the cleaning member 22 is located in the rear end cover 21, and the cleaning member 22 includes a cleaning disc 221 and bristles 222. One end of the rotating shaft 13 extends into the rear end cover 21. The cleaning disc 221 is coaxially penetrated along the thickness direction with a center hole 2211. The cleaning disc 221 is sleeved on the rotating shaft 13 through the center hole 2211. The rotating shaft 13 is threadedly connected with nuts 131 on both sides of the cleaning disc 221. The two nuts 131 cooperate to fix the cleaning disc 221 and the rotating shaft 13. A plurality of bristles 222 are provided, and the bristles 222 are rubber soft strips. The bristles 222 and the cleaning disc 221 are fixedly connected on one side facing the heat dissipation hole 211.

2 and 3, a section of the shaft 13 extending into the rear end cover 21 is coaxially welded with a plurality of blades 132 on the side away from the cleaning disc 221, and the plurality of blades 132 are evenly spaced along the circumference of the shaft 13. The cleaning disc 221 is provided with a plurality of evenly distributed ventilation holes 2212 extending through the thickness direction.

1 and 2, the shell 11 is welded with a plurality of heat sinks 113 evenly spaced along the circumferential direction, the heat sink 113 is a copper-zinc alloy sheet, the heat sink 113 is bent in an S shape along the length direction, and a guide groove 1131 is formed between two adjacent heat sinks 113. A plurality of guide holes 212 evenly spaced along the circumferential direction are formed on the end wall of the rear end cover 21 close to the shell 11, and one end of the guide groove 1131 is connected to the guide hole 212 on the rear end cover 21 in a one-to-one correspondence.

The implementation principle of a dustproof permanent magnet synchronous motor in the embodiment of the present application is as follows: when the permanent magnet synchronous motor is working, the rear end cover 21 located at the rear end of the housing 11 can provide dustproof protection for the motor, and the heat dissipation holes 211 provided can ensure good heat dissipation effect of the permanent magnet synchronous motor during operation. During the operation of the permanent magnet synchronous motor, the rotating shaft 13 drives the cleaning disk 221 to rotate when it rotates, and the cleaning disk 221 drives the bristles 222 to clean the heat dissipation holes 211 when it rotates, so that the dust accumulated in the heat dissipation holes 211 can be cleaned. The rotating shaft 13 drives the fan blades 132 to rotate while the rotating shaft 13 rotates, and the fan blades 132 blow air toward one side of the rear end cover 21 when it rotates, so that the dust cleaned by the bristles 222 is blown out of the rear end cover 21, and the cleaned dust is prevented from falling into the rear end cover 21, which is conducive to maintaining a good dustproof effect of the rear end cover 21.

When the fan blades 132 blow air toward the rear end cover 21, negative pressure is formed inside the rear end cover 21, and the external cold air flows into the guide hole 212 through the guide groove 1131, and then is discharged through the heat dissipation hole 211 of the rear end cover 21. This cycle can accelerate the air circulation outside the shell 11, which is conducive to ensuring that the shell 11 has a good heat dissipation effect. At the same time, when the fan blades 132 blow air toward the rear end cover 21, negative pressure is formed inside the rear end cover 21, and the external cold air enters the shell 11 through the heat dissipation air inlet hole 111 at one end of the shell 11 to cool the motor body 1, and then the cooled air is discharged into the rear end cover 21 through the heat dissipation exhaust hole 112 at the other end, and then is discharged through the heat dissipation hole 211. The continuous cycle of the above process is conducive to fully cooling the inside of the motor body 1, which is conducive to ensuring that the motor has a good cooling and heat dissipation effect.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. The utility model provides a dustproof PMSM, includes motor body (1) and dustproof subassembly (2), its characterized in that: the motor body (1) comprises a shell (11), a stator (12), a rotating shaft (13) and a rotor (14), wherein the stator (12) is fixedly connected in the shell (11), the rotating shaft (13) is coaxially and rotatably connected with the shell (11), two ends of the rotating shaft (13) extend out of the shell (11), the rotor (14) is positioned in the shell (11), and the rotor (14) and the rotating shaft (13) are coaxially and fixedly connected with one section of the shell (11);

The dustproof assembly (2) is located the casing (11) rear end, dustproof assembly (2) are including rear end cap (21) and clearance piece (22), rear end cap (21) cover is located casing (11) rear end, rear end cap (21) deviate from one side of casing (11) runs through and has seted up a plurality of evenly distributed's louvres (211), pivot (13) one end extends to in rear end cap (21), clearance piece (22) with pivot (13) extend to one end in rear end cap (21) and connect, clearance piece (22) are used for cleaning the dust in louvre (211).

2. A dustproof permanent magnet synchronous motor according to claim 1, characterized in that: the cleaning piece (22) comprises a cleaning disc (221) and bristles (222), the cleaning disc (221) and the rotating shaft (13) extend to one end in the rear end cover (21) and are coaxially connected, the bristles (222) are arranged in a plurality, and the bristles (222) and the cleaning disc (221) are fixedly connected towards one side of the radiating hole (211).

3. A dustproof permanent magnet synchronous motor according to claim 2, characterized in that: the cleaning disc (221) is coaxially provided with a central hole (2211), the cleaning disc (221) is sleeved on the rotating shaft (13) through the central hole (2211), and nuts (131) used for fixing the cleaning disc (221) are respectively and threadedly connected to two sides of the rotating shaft (13) on the cleaning disc (221).

4. A dustproof permanent magnet synchronous motor according to claim 3, characterized in that: the section of the rotating shaft (13) extending into the rear end cover (21) is coaxially and fixedly connected with a fan blade (132) at one side away from the cleaning disc (221).

5. A dustproof permanent magnet synchronous motor according to claim 4, characterized in that: a plurality of ventilation holes (2212) which are uniformly distributed at intervals are formed in the cleaning disc (221) in a penetrating mode.

6. A dustproof permanent magnet synchronous motor according to claim 1, characterized in that: the novel heat dissipation device is characterized in that a plurality of cooling fins (113) which are uniformly distributed at intervals are arranged on the outer side wall of the shell (11) along the circumferential direction of the rotating shaft (13), guide grooves (1131) are formed between every two adjacent cooling fins (113), a plurality of guide holes (212) are formed in one end, close to the shell (11), of the rear end cover (21), and the guide grooves (1131) are communicated with the guide holes (212) in the rear end cover (21) in a one-to-one correspondence mode.

7. A dustproof permanent magnet synchronous motor according to claim 6, characterized in that: the radiating fins (113) are arranged in an S-shaped bending mode along the length direction.

8. A dustproof permanent magnet synchronous motor according to claim 1, characterized in that: a plurality of heat dissipation exhaust holes (112) are formed in one end face, close to the rear end cover (21), of the shell (11), and a plurality of heat dissipation air inlet holes (111) are formed in one end face, far away from the rear end cover (21), of the shell (11).