A motor with self-fan cooling structure

Abstract

The present application provides a motor with a self-fan cooling structure, which relates to the field of motor technology. It includes: a motor housing, an output shaft, a motor assembly and a plurality of cooling fan blades, a rotating hole is provided on one side of the motor housing, one end of the output shaft is inserted into the motor housing through the rotating hole and is rotatably connected to the inner wall of the motor housing, and the other end of the output shaft extends out of the motor housing; the motor assembly includes a rotor and a stator, the rotor is arranged on the shaft body of the output shaft located in the motor housing, and the stator is arranged on the inner wall of the motor housing and can drive the rotor to drive the output shaft to rotate; a plurality of cooling fan blades are arranged at equal intervals around the shaft body of the output shaft, each cooling fan blade is connected to the rotor, and a vent leading to the stator and the rotor is provided on the motor housing. The present application has the effect of low risk of motor overheating damage.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor with a self-fan cooling structure. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy.

[0003] Existing motors generally include a housing, an output shaft, a stator and a rotor. The housing is provided with a rotation hole, one end of the output shaft is inserted into the housing through the rotation hole and is rotatably connected to the inner wall of the housing, the rotor is arranged inside the housing and connected to the output shaft, the stator is arranged on the inner wall of the housing and can drive the rotor to drive the output shaft to rotate, and a heat dissipation port for heat dissipation is also provided on the housing.

[0004] However, under conditions of heavy load or high speed, a large amount of heat will be quickly generated inside the motor. It is difficult to dissipate heat in time by relying solely on natural ventilation through the heat dissipation vents, and the risk of motor overheating and damage is high.

[0005] In view of this, it is necessary to provide a motor with a self-fan cooling structure. Utility Model Content

[0006] In order to solve the problem that the existing motors only rely on natural ventilation to dissipate heat, resulting in a high risk of overheating and damage to the motors, the present application provides a motor with a self-fan cooling structure.

[0007] The present application provides a motor with a self-fan cooling structure, which adopts the following technical solution: comprising a motor housing, an output shaft, a motor assembly and a plurality of cooling fan blades, wherein a rotation hole is opened on one side of the motor housing, one end of the output shaft passes through the rotation hole and is inserted into the motor housing and is rotatably connected to the inner wall of the motor housing, and the other end of the output shaft extends out of the motor housing;

[0008] The motor assembly includes a rotor and a stator, wherein the rotor is arranged on the shaft body located inside the motor housing on the output shaft, and the stator is arranged on the inner wall of the motor housing and can drive the rotor to drive the output shaft to rotate;

[0009] A plurality of cooling fan blades are arranged at equal intervals around the shaft of the output shaft, each of the cooling fan blades is connected to the rotor, and a ventilation opening leading to the stator and the rotor is provided on the motor housing.

[0010] By adopting the above technical solution, when the stator drives the rotor to rotate, the rotor can drive the cooling fan blades to rotate, so that the cooling fan blades can fan the stator and the rotor, thereby accelerating the air flow rate on the surface of the stator and the rotor, thereby improving the cooling efficiency of the stator and the rotor, and ensuring timely heat dissipation of the motor with a self-fan cooling structure even under conditions of large load or high speed, thereby greatly reducing the risk of overheating and damage of the motor.

[0011] Specifically, the motor housing includes a mounting sleeve, a front end cover and a rear end cover, the front end cover is detachably connected to one end port of the mounting sleeve, the rear end cover is detachably connected to the other end port of the mounting sleeve, the front end cover is provided with the rotating hole, the rear end cover is provided with a rotating groove on a cover surface on a side facing the front end cover, the output shaft is inserted into the rotating groove, and bearings are provided between the shaft body of the output shaft and the groove wall of the rotating groove and the hole wall of the rotating hole.

[0012] By adopting the above technical solution, one end of the output shaft can be rotatably connected to the groove wall of the rotating groove through the bearing, and the other end of the output shaft can be rotatably connected to the hole wall of the rotating hole through the bearing.

[0013] Furthermore, a magnetic steel is provided on the outer side of the rotor, the stator is sleeved on the rotor and connected to the inner wall of the mounting sleeve, and a coil matched with the magnetic steel is provided on the stator.

[0014] By adopting the above technical solution, the stator can drive the magnetic steel on the rotor to rotate around its own rotation axis through the coil.

[0015] Furthermore, a power interface is provided on the rear end cover, and an external power line can pass through the power interface to be electrically connected to the stator. A cover plate for sealing the power interface is also screwed on the power interface.

[0016] By adopting the above technical solution, the user can first remove the cover on the power interface, and then pass the external power cord through the power interface to electrically connect to the stator, so as to provide power for the motor with a self-fan cooling structure.

[0017] Furthermore, the motor assembly also includes a centrifugal switch, the coil includes a main winding and a secondary winding, the centrifugal switch is connected in series in the circuit between the power line and the secondary winding and can control the secondary winding to work or stop.

[0018] By adopting the above technical solution, when the centrifugal switch is turned on, the power line can supply power to the auxiliary winding, so that the auxiliary winding can start working and apply a magnetic field to the rotor to help the rotor rotate; and after the rotor starts to rotate and reaches a certain speed, the centrifugal switch will automatically disconnect and the auxiliary winding will stop working.

[0019] Furthermore, the front cover and the rear cover are both provided with the ventilation opening.

[0020] By adopting the above technical solution, after the cooling fan blades start to rotate, the cold air from the outside can pass through the vents into the motor casing, and the hot air inside the motor casing can also pass through the vents to leave the motor casing.

[0021] Furthermore, it also includes a grounding bracket and a grounding wire, the grounding bracket is provided with a pair of clamping holes, the front cover and the rear cover are provided with clamping joints, the clamping joints correspond to the clamping holes one by one, and each of the clamping joints is inserted into the corresponding clamping hole and clamped with the clamping hole;

[0022] One end of the grounding wire is connected to the grounding bracket, and the other end of the grounding wire is connected to the rear end cover.

[0023] By adopting the above technical solution, after the grounding bracket is placed on the ground, the motor housing can be electrically connected to the ground through the grounding wire and the grounding bracket, thereby achieving grounding of the motor with a self-fan cooling structure.

[0024] Furthermore, a shock absorbing ring is provided between each of the clamping joints and the hole wall of the clamping hole.

[0025] By adopting the above technical solution, the shock absorbing ring can form a buffer between the motor casing and the grounding bracket, so that the vibration generated when the motor casing is working can be absorbed by the shock absorbing ring.

[0026] In summary, this application includes the following beneficial technical effects:

[0027] The motor case includes a motor housing, an output shaft, a motor assembly and a plurality of cooling fan blades. A rotating hole is provided on one side of the motor housing, one end of the output shaft passes through the rotating hole and is inserted into the motor housing and is rotatably connected to the inner wall of the motor housing, and the other end of the output shaft extends out of the motor housing; the motor assembly includes a rotor and a stator, the rotor is arranged on the shaft body of the output shaft located in the motor housing, and the stator is arranged on the inner wall of the motor housing and can drive the rotor to drive the output shaft to rotate; the plurality of cooling fan blades are arranged at equal intervals around the shaft body of the output shaft, and each cooling fan blade is connected to the rotor, and a vent leading to the stator and the rotor is provided on the motor housing. When the stator drives the rotor to rotate, the rotor can drive the cooling fan blades to rotate, so that the cooling fan blades can fan the stator and the rotor, thereby accelerating the air flow rate on the surface of the stator and the rotor, thereby improving the cooling efficiency of the stator and the rotor, and even under conditions of large load or high speed, timely heat dissipation of the motor with a self-fan cooling structure can be guaranteed, thereby greatly reducing the risk of overheating and damage of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a rear end cover of a motor with a self-fan cooling structure according to the present application;

[0029] Figure 2 is along Figure 1 Schematic cross-sectional view taken along the AA direction.

[0030] Figure numerals: 1. Motor housing; 11. Mounting sleeve; 12. Front cover; 121. Rotation hole; 13. Rear cover; 131. Rotation slot; 132. Cover plate; 14. Vent; 2. Output shaft; 3. Motor assembly; 31. Rotor; 32. Stator; 33. Centrifugal switch; 4. Cooling blades; 5. Grounding bracket; 51. Snap-in hole; 52. Shock absorber; 6. Grounding wire. DETAILED DESCRIPTION

[0031] Figure 1 This is a front view of a rear end cover of a motor with a self-fan cooling structure according to the present application. Figure 2 is along Figure 1 Schematic cross-sectional view taken along the AA direction. Figure 1 and Figure 2 A motor with a self-fan cooling structure provided in the present application includes: a motor housing 1, an output shaft 2, a motor assembly 3 and a plurality of cooling fan blades 4, a rotating hole 121 is opened on one side of the motor housing 1, one end of the output shaft 2 passes through the rotating hole 121 and is inserted into the motor housing 1 and is rotatably connected to the inner wall of the motor housing 1, and the other end of the output shaft 2 extends out of the motor housing 1; the motor assembly 3 includes a rotor 31 and a stator 32, the rotor 31 is arranged on the shaft body of the output shaft 2 located in the motor housing 1, and the stator 32 is arranged on the inner wall of the motor housing 1 and can drive the rotor 31 to drive the output shaft 2 to rotate; the plurality of cooling fan blades 4 are arranged at equal intervals around the shaft body of the output shaft 2, and each cooling fan blade 4 is connected to the rotor 31.

[0032] See also Figure 1 and Figure 2 The motor housing 1 includes a mounting sleeve 11, a front end cover 12 and a rear end cover 13. The front end cover 12 is detachably connected to one end port of the mounting sleeve 11 by bolts, and the rear end cover 13 is detachably connected to the other end port of the mounting sleeve 11 by bolts. A rotating hole 121 is provided on the front end cover 12, and a rotating groove 131 is provided on a cover surface of the rear end cover 13 facing the front end cover 12. The output shaft 2 is inserted into the rotating groove 131. Bearings are provided between the shaft body of the output shaft 2 and the groove wall of the rotating groove 131 and the hole wall of the rotating hole 121, so that the output shaft 2 can be rotatably connected to the groove wall of the rotating groove 131 and the hole wall of the rotating hole 121 through the bearing; ventilation holes 14 are also provided on the front end cover 12 and the rear end cover 13 (because the shape of the ventilation holes 14 on the front end cover 12 is the same as the shape of the ventilation holes 14 on the rear end cover 13, Figure 1Only the vent 14 on the rear end cover 13 is shown).

[0033] Through the above-mentioned arrangement, when the stator 32 drives the rotor 31 to rotate, the rotor 31 can drive the cooling fan blades 4 to rotate, so that the cooling fan blades 4 can fan the stator 32 and the rotor 31, thereby accelerating the air flow rate on the surface of the stator 32 and the rotor 31, so that the cold air from the outside can pass through the vents 14 into the motor casing 1, and the hot air inside the motor casing 1 can also pass through the vents 14 to leave the motor casing 1, thereby improving the cooling efficiency of the stator 32 and the rotor 31, and ensuring timely heat dissipation of the motor with a self-fan cooling structure even under conditions of large load or high speed, thereby greatly reducing the risk of overheating and damage to the motor.

[0034] See also Figure 1 and Figure 2 A magnet is provided on the outer side of the rotor 31, and the stator 32 is sleeved on the rotor 31 and connected to the inner wall of the mounting sleeve 11, and a coil matched with the magnet is provided on the stator 32, so that the stator 32 can drive the magnet on the rotor 31 to rotate around its own rotating axis through the coil; a power interface is provided on the rear end cover 13, and an external power line can pass through the power interface to be electrically connected to the stator 32, and a cover plate 132 for sealing the power interface is also screwed on the power interface, so that the user can first remove the cover plate 132 on the power interface, and then pass the external power line through the power interface to be electrically connected to the stator 32, so as to provide power for the motor with a self-fan cooling structure.

[0035] See also Figure 1 and Figure 2 The motor assembly 3 also includes a centrifugal switch 33. The coil on the stator 32 includes a main winding and an auxiliary winding (neither the main winding nor the auxiliary winding is shown in the figure). The centrifugal switch 33 is connected in series to the circuit between the power line and the auxiliary winding and can control the auxiliary winding to work or stop. When the centrifugal switch 33 is turned on, the power line can supply power to the auxiliary winding so that the auxiliary winding can start working and apply a magnetic field to the rotor 31 to help the rotor 31 rotate; and after the rotor 31 starts to rotate and reaches a certain speed, the centrifugal switch 33 will automatically disconnect and stop the auxiliary winding from working.

[0036] See also Figure 1 and Figure 2A motor with a self-fan cooling structure also includes a grounding bracket 5 and a grounding wire 6. A pair of clamping holes 51 are opened on the grounding bracket 5. A clamping joint is provided on the front cover 12 and the rear cover 13. The clamping joint corresponds to the clamping hole 51 one by one. Each clamping joint is inserted into the corresponding clamping hole 51 and clamped with the clamping hole 51; one end of the grounding wire 6 is crimped into the screw hole on the grounding bracket 5 by a bolt, and the other end of the grounding wire 6 is crimped into the screw hole on the rear cover 13 by a bolt; after the grounding bracket 5 is placed on the ground, the motor housing 1 can be electrically connected to the ground through the grounding wire 6 and the grounding bracket 5, thereby realizing the grounding of the motor with a self-fan cooling structure.

[0037] Preferably, a shock-absorbing ring 52 may be provided between each snap joint and the hole wall of the snap hole 51. The shock-absorbing ring 52 may be a rubber ring so as to form a buffer between the motor housing 1 and the grounding bracket 5, so that the vibration generated by the motor housing 1 during operation can be absorbed by the shock-absorbing ring 52.

[0038] The working principle of a motor with a self-fan cooling structure in the present application is as follows:

[0039] The motor housing 1 includes a motor assembly 3, an output shaft 2, a motor assembly 3, and a plurality of cooling fan blades 4. A rotation hole 121 is provided on one side of the motor housing 1. One end of the output shaft 2 passes through the rotation hole 121 and is inserted into the motor housing 1 and is rotationally connected to the inner wall of the motor housing 1. The other end of the output shaft 2 extends out of the motor housing 1. The motor assembly 3 includes a rotor 31 and a stator 32. The rotor 31 is arranged on the shaft body of the output shaft 2 located in the motor housing 1. The stator 32 is arranged on the inner wall of the motor housing 1 and can drive the rotor 31 to drive the output shaft 2 to rotate. The plurality of cooling fan blades 4 are arranged at equal intervals around the shaft body of the output shaft 2. , each cooling fan blade 4 is connected to the rotor 31, and a vent 14 leading to the stator 32 and the rotor 31 is opened on the motor housing 1. When the stator 32 drives the rotor 31 to rotate, the rotor 31 can drive the cooling fan blades 4 to rotate, so that the cooling fan blades 4 can fan the stator 32 and the rotor 31, and then accelerate the air flow rate on the surface of the stator 32 and the rotor 31, thereby improving the cooling efficiency of the stator 32 and the rotor 31, and even under heavy load or high speed conditions, timely heat dissipation of the motor with a self-fan cooling structure can be guaranteed, thereby greatly reducing the risk of overheating and damage of the motor.

[0040] It should be noted that the above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all 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

1. A motor with a self-fan cooling structure, characterized in that: The motor housing (1) comprises a motor casing (1), an output shaft (2), a motor assembly (3) and a plurality of cooling fan blades (4); a rotation hole (121) is provided on one side of the motor casing (1); one end of the output shaft (2) passes through the rotation hole (121) and is inserted into the motor casing (1) and is rotationally connected to the inner wall of the motor casing (1); the other end of the output shaft (2) extends out of the motor casing (1); The motor assembly (3) comprises a rotor (31) and a stator (32), wherein the rotor (31) is arranged on the shaft body of the output shaft (2) located inside the motor housing (1), and the stator (32) is arranged on the inner wall of the motor housing (1) and is capable of driving the rotor (31) to drive the output shaft (2) to rotate; A plurality of cooling blades (4) are arranged at equal intervals around the shaft of the output shaft (2), each of the cooling blades (4) is connected to the rotor (31), and a ventilation opening (14) leading to the stator (32) and the rotor (31) is provided on the motor housing (1).

2. The motor with a self-fan cooling structure according to claim 1, characterized in that: The motor housing (1) comprises a mounting sleeve (11), a front end cover (12) and a rear end cover (13); the front end cover (12) is detachably connected to one end port of the mounting sleeve (11); the rear end cover (13) is detachably connected to the other end port of the mounting sleeve (11); the front end cover (12) is provided with the rotating hole (121); a rotating groove (131) is provided on a cover surface of the rear end cover (13) facing the front end cover (12); the output shaft (2) is inserted into the rotating groove (131); and bearings are provided between the shaft body of the output shaft (2) and the groove wall of the rotating groove (131) and the hole wall of the rotating hole (121).

3. The motor with a self-fan cooling structure according to claim 2, characterized in that: A magnetic steel is provided on the outer side of the rotor (31), the stator (32) is sleeved on the rotor (31) and connected to the inner wall of the mounting sleeve (11), and a coil matched with the magnetic steel is provided on the stator (32).

4. The motor with a self-fan cooling structure according to claim 3, characterized in that: The rear end cover (13) is provided with a power interface, through which an external power line can pass to be electrically connected to the stator (32), and a cover plate (132) for sealing the power interface is also screwed onto the power interface.

5. The motor with a self-fan cooling structure according to claim 4, characterized in that: The motor assembly (3) further comprises a centrifugal switch (33), the coil comprises a main winding and a secondary winding, the centrifugal switch (33) is connected in series in the circuit between the power line and the secondary winding and can control the secondary winding to start or stop.

6. The motor with a self-fan cooling structure according to claim 2, characterized in that: The front end cover (12) and the rear end cover (13) are both provided with the ventilation opening (14).

7. The motor with a self-fan cooling structure according to claim 2, characterized in that: It also includes a grounding bracket (5) and a grounding wire (6), wherein the grounding bracket (5) is provided with a pair of clamping holes (51), the front end cover (12) and the rear end cover (13) are both provided with clamping joints, the clamping joints correspond to the clamping holes (51) one by one, and each of the clamping joints is inserted into the corresponding clamping hole (51) and clamped with the clamping hole (51); One end of the grounding wire (6) is connected to the grounding bracket (5), and the other end of the grounding wire (6) is connected to the rear end cover (13).

8. The motor with a self-fan cooling structure according to claim 7, characterized in that: A shock absorbing ring (52) is provided between each of the clamping joints and the hole wall of the clamping hole (51).

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