Small-size large-torque output motor convenient for heat dissipation

Abstract

The utility model relates to the technical field of external rotor motors, in particular to a small-size large-torque output motor convenient for heat dissipation, which comprises a stator, a rotor sleeved on the outer side of the stator and matched with the stator for use, and a control device mounted on the stator and used for controlling current, and is characterized in that the rotor comprises a cylinder sleeved on the outer side of the stator; the permanent magnets are arranged between the cylinder body and the stator and distributed in the circumferential direction of the cylinder body, the dustproof heat dissipation structure is arranged at one end of the cylinder body, and the rotating shaft is fixedly connected with the dustproof heat dissipation structure, penetrates through the stator and is rotationally connected with the stator through a bearing. The problems that according to an existing outer rotor motor, dust easily enters the motor, and generated heat is not prone to being dissipated are effectively solved. According to the utility model, the blades arranged on the rotor are utilized to dissipate heat of the cylinder body, and the dustproof pad and the dustproof holes formed in the dustproof pad are utilized to block dust, so that the dust is prevented from entering the cylinder body to influence the operation of the stator and the rotor.

Description

Technical Field

[0001] The utility model relates to the technical field of outer rotor motors, in particular to a small-volume and high-torque output motor that is convenient for heat dissipation. Background Art

[0002] The rotor is one of the most important parts of a DC motor. According to the position of the rotor, DC motors are divided into inner rotor motors and outer rotor motors. The inner rotor means that the transmission part of the motor is inside, and the outer motor housing is static and motionless. The outer rotor motor usually has the rotating part embedded with magnetic steel, and the non-rotating part is the coil part. Compared with the inner rotor motor, the outer rotor motor has a larger moment of inertia of the rotating shaft, and does not need to reduce the volume of the magnet.

[0003] In existing outer rotor motors, the end of the rotating outer rotor is generally hollowed out, which can reduce the weight of the rotating part on the one hand and dissipate heat inside the motor on the other hand. However, this hollow design will cause dust to easily enter the motor from here. The dust entering the motor will affect the coils on the stator and the permanent magnets on the rotor, thereby reducing the service life of the motor. At the same time, relying solely on the motor's own gaps and spaces to reduce the heat inside the motor is too inefficient and cannot dissipate heat inside the motor well. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a small-volume, high-torque output motor that is easy to dissipate heat, which effectively solves the problem that dust easily enters the interior of the motor and the heat generated is difficult to dissipate.

[0005] The technical solution provided by the utility model is a small-volume, high-torque output motor that is easy to dissipate heat, comprising a stator, a rotor that is sleeved on the outside of the stator and used in conjunction with the stator, and a control device installed on the stator for controlling current, wherein the rotor comprises a cylinder sleeved on the outside of the stator, a plurality of permanent magnets that are arranged between the cylinder and the stator and distributed along the circumferential direction of the cylinder, a dustproof and heat dissipation structure arranged at one end of the cylinder, and a rotating shaft fixedly connected to the dustproof and heat dissipation mechanism, wherein the rotating shaft passes through the stator and is rotatably connected to the stator via a bearing.

[0006] Preferably, the dustproof and heat dissipation structure includes a cover inserted into the cylinder and detachably connected to the cylinder, a placement hole opened on the cover and connected to the cylinder, a dustproof pad fixedly connected in the placement hole, and a plurality of dustproof holes opened on the dustproof pad for connecting the interior of the cylinder with the external space.

[0007] Preferably, the dustproof and heat dissipation structure further comprises a plurality of blades arranged at an end of the cover away from the stator and evenly distributed along the end surface thereof, and the dustproof pad is fixedly connected to the blades via bolts.

[0008] Preferably, one end of the rotating shaft passes through the cover, and a limiting bolt is threadedly connected to the cover for use with the outer edge surface of the rotating shaft.

[0009] Preferably, the cover is provided with a placement groove corresponding to the permanent magnet and used for placing the permanent magnet.

[0010] Preferably, the stator includes a stator core located in a cylinder, a sleeve arranged at the center of the stator core, and a base plate arranged on the sleeve for fixing the stator, the stator core is wound with a coil used in conjunction with a permanent magnet, and the base plate is located on a side of the sleeve away from the cover and extending out of the stator core.

[0011] Preferably, the rotating shaft is located in the sleeve and is rotatably connected to the sleeve via a bearing.

[0012] The beneficial effects of the utility model are:

[0013] The utility model utilizes the blades arranged on the rotor to increase the contact area between the cylinder and the air so as to dissipate the heat of the cylinder. On the other hand, during the rotation of the cylinder, the blades are used to stir the air so that the outside air can better enter the cylinder for heat dissipation. At the same time, the dust is blocked by the dustproof pad and the dustproof holes on the dustproof pad to prevent dust from entering the cylinder and affecting the operation of the stator and the rotor. In addition, the outer rotor is arranged to increase the torque of the utility model while ensuring the small size of the utility model, so that the utility model can be applied to more small scenes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a cutaway right-side structural stereoscopic schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model when viewed from above;

[0017] Figure 4 It is a top view of the three-dimensional structure of the utility model after removing the sleeve and the end cover;

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model after removing the cylinder;

[0019] In the figure, 1-cylinder; 2-permanent magnet; 3-rotating shaft; 4-bearing; 5-cover; 6-placing hole; 7-dustproof pad; 8-dustproof hole; 9-blade; 10-bolt; 11-limiting bolt; 12-placing slot; 13-stator core; 14-sleeve; 15-bottom plate. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0021] Depend on Figures 1 to 5 Provided is a small-volume, high-torque output motor that is easy to dissipate heat, comprising a stator, the stator being fixed to a housing of an object to be driven, a rotor being sleeved on the outside of the stator and used in conjunction with the stator, the rotor being connected to the object to be driven, and the rotor being sleeved on the outside of the stator to drive the object to be driven, the rotor being an external rotor motor, and being able to output a large torque while ensuring a small volume;

[0022] And a control device installed on the stator for controlling the current, the control device is used to output the current, the control device adopts a PCB board, the current is input into the coil of the stator through the PCB board, and a corresponding magnetic field is generated in the coil of the stator under the action of electromagnetic induction.

[0023] The rotor comprises a cylinder 1 sleeved on the outside of the stator, a plurality of permanent magnets 2 arranged between the cylinder 1 and the stator and distributed along the circumferential direction of the cylinder 1, the cylinder 1 is synchronously driven to rotate under the action of the coil and the permanent magnet 2, and a dustproof heat dissipation structure is arranged at one end of the cylinder 1, the dustproof heat dissipation structure is used to prevent dust from entering the cylinder 1, and at the same time, the dustproof heat dissipation structure accelerates the circulation of air in the cylinder 1, and the inside of the cylinder 1 is cooled and cooled during operation;

[0024] And the rotating shaft 3 is fixedly connected to the dustproof and heat dissipation mechanism. The permanent magnet 2 drives the rotating shaft 3 to rotate through the cylinder 1 and the dustproof and heat dissipation structure. The rotating shaft 3 passes through the stator and is rotatably connected to the stator through the bearing 4. Under the action of the bearing 4, the rotating shaft 3 can rotate better relative to the stator.

[0025] The dustproof and heat dissipation structure includes a cover 5 that is inserted into the cylinder 1 and detachably connected to the cylinder 1, a placement hole 6 that is opened on the cover 5 and connected to the cylinder 1, a dustproof pad 7 that is fixedly connected to the placement hole 6, and a plurality of dustproof holes 8 that are used to connect the interior of the cylinder 1 with the outside space are opened on the dustproof pad 7. On the one hand, the dustproof holes 8 can ensure that the air in the cylinder 1 is connected with the outside world, and on the other hand, the dustproof holes 8 can block some of the dust from the outside world on the dustproof pad 7 to prevent dust from entering the interior of the cylinder 1 and affecting the stator and rotor.

[0026] The dustproof and heat dissipation structure also includes a plurality of blades 9 arranged at an end of the cover 5 away from the stator and evenly distributed along its end surface. The dustproof pad 7 is fixedly connected to the blades 9 via bolts 10. On the one hand, the blades 9 provide a fixing base for the dustproof pad 7. On the other hand, during the rotation of the cylinder 1, the blades 9 stir the air so that the outside air can better enter the interior of the cylinder 1.

[0027] One end of the rotating shaft 3 passes through the cover 5 , and a limit bolt 11 is threadedly connected to the cover 5 and used in conjunction with the outer edge of the rotating shaft 3 . The rotating shaft 3 is fixed by the limit bolt 11 .

[0028] The cover 5 is provided with a placement groove 12 corresponding to the permanent magnet 2 and used for placing the permanent magnet 2. The placement groove 12 is used to accommodate the permanent magnet 2. Under the action of the placement groove 12, the permanent magnet 2 and the cover 5 can be relatively fixed.

[0029] The stator includes a stator core 13 located in the cylinder 1, and a plurality of branches are arranged on the stator core 13, wherein the distance between two adjacent branches is greater than the distance between two permanent magnets 2. The above arrangement is a conventional arrangement in the prior art, so that after power is turned on, there will always be a permanent magnet 2 and a branch of the stator core 13 misaligned, so that the rotor can always have a driving force to rotate;

[0030] A sleeve 14 is arranged at the center of the stator core 13, and a bottom plate 15 is arranged on the sleeve 14 for fixing the stator. The bottom plate 15 is fixedly connected to the housing of the device to be driven, so that the utility model can be better fixed;

[0031] The stator core 13 is wound with a coil used in conjunction with the permanent magnet 2 , and the bottom plate 15 is located on a side of the sleeve 14 that is away from the cover 5 and extends out of the stator core 13 .

[0032] The rotating shaft 3 is located in the sleeve 14 and is rotatably connected to the sleeve 14 via the bearing 4 . Under the action of the bearing 4 , the rotating shaft 3 can rotate relative to the stator.

[0033] When the utility model is in use, the staff connects the appropriate wire with the control device and energizes the coil. When the coil is energized, the coil generates a magnetic field. At the same time, the magnetic field generated by the coil and the magnetic field of the permanent magnet 2 repel each other, causing the rotor to rotate. At the same time, the rotor drives the blades 9 to rotate. The blades 9 stir the air during the rotation, so that the air with lower external temperature enters the interior of the cylinder 1 with higher temperature, and the interior of the cylinder 1 is dissipated. In addition, the dustproof pad 7 blocks the external dust, reduces the volume of the external dust entering the interior of the cylinder 1, and prevents the dust from affecting the operation of the stator and the rotor.

[0034] The utility model utilizes blades arranged on the rotor to dissipate heat from the cylinder, and utilizes a dustproof pad and dustproof holes opened on the dustproof pad to block dust, thereby preventing dust from entering the cylinder and affecting the operation of the stator and the rotor. At the same time, the arrangement of the outer rotor increases the torque of the utility model while ensuring that the volume of the utility model is small, so that the utility model can be applied to more small scenes.

Claims

1. A small-volume, high-torque output motor that is easy to dissipate heat, comprising a stator, a rotor that is sleeved outside the stator and used in conjunction with the stator, and a control device installed on the stator for controlling current, characterized in that: The rotor comprises a cylinder (1) sleeved on the outside of a stator, a plurality of permanent magnets (2) arranged between the cylinder (1) and the stator and distributed along the circumferential direction of the cylinder (1), a dustproof and heat dissipation structure arranged at one end of the cylinder (1), and a rotating shaft (3) fixedly connected to the dustproof and heat dissipation structure, wherein the rotating shaft (3) passes through the stator and is rotatably connected to the stator via a bearing (4).

2. A small-volume, high-torque output motor that is easy to dissipate heat according to claim 1, characterized in that: The dustproof heat dissipation structure comprises a cover (5) inserted into the cylinder (1) and detachably connected to the cylinder (1), a placement hole (6) provided on the cover (5) and connected to the cylinder (1), a dustproof pad (7) fixedly connected to the placement hole (6), and a plurality of dustproof holes (8) for connecting the interior of the cylinder (1) with an external space are provided on the dustproof pad (7).

3. A small-volume, high-torque output motor that is easy to dissipate heat according to claim 2, characterized in that: The dustproof heat dissipation structure further comprises a plurality of blades (9) arranged at an end of the cover (5) away from the stator and evenly distributed along the end surface thereof, and the dustproof pad (7) is fixedly connected to the blades (9) via bolts (10).

4. A small-volume, high-torque output motor that is easy to dissipate heat according to claim 3, characterized in that: One end of the rotating shaft (3) passes through the cover (5), and a limit bolt (11) is threadedly connected to the cover (5) and is used in conjunction with the outer edge surface of the rotating shaft (3).

5. The small-volume, high-torque output motor with convenient heat dissipation according to claim 3, characterized in that: The cover (5) is provided with a placement groove (12) corresponding to the permanent magnet (2) and used for placing the permanent magnet (2).

6. The small-volume, high-torque output motor with convenient heat dissipation according to claim 1, characterized in that: The stator comprises a stator core (13) located in a cylinder (1), a sleeve (14) arranged at the center of the stator core (13), and a bottom plate (15) arranged on the sleeve (14) for fixing the stator, wherein a coil used in conjunction with a permanent magnet (2) is wound on the stator core (13), and the bottom plate (15) is located on a side of the sleeve (14) away from the cover (5) and extending out of the stator core (13).

7. A small-volume, high-torque output motor that is easy to dissipate heat according to claim 6, characterized in that: The rotating shaft (3) is located in the sleeve (14) and is rotatably connected to the sleeve (14) via a bearing (4).

Images