CN220043159U - High-safety brush direct-current motor - Google Patents

Abstract

The utility model discloses a high-safety brush direct current motor, which comprises a cylinder shell, wherein the front end and the rear end of the cylinder shell are respectively connected with a front cover structure and a rear cover structure, a motor shaft is jointly and movably connected between the front cover structure and the rear cover structure through shaft penetration, a rotor, a commutator and a fan are sleeved on the motor shaft, a permanent magnet is connected on the inner wall surface of the cylinder shell, the rotor is positioned at the inner side of the permanent magnet, two sides of the commutator are electrically connected with electric brushes, and the two electric brushes are connected with the inner wall surface of the rear cover structure; the peripheral side rear side rotation cover of back lid structure is equipped with the structure of blowing outward, and the rear end butt of structure of blowing outward has the connecting plate, and the rear end of motor shaft extends to the rear of back lid structure and is connected with the structure transmission of blowing outward, and the connecting plate passes through the bolt and links to each other with the rear end of back lid structure. The motor heat dissipation structure enhances the heat dissipation effect inside and outside the motor, so that the motor can be effectively prevented from being overheated, the safety of the motor in the use process is effectively improved, and the motor has the advantage of high safety.

Description

High-safety brush direct-current motor

Technical Field

The utility model relates to the technical field of brush motors, in particular to a high-safety brush direct current motor.

Background

The permanent magnet brush motor is a motor which provides power for winding wires through carbon brushes. The winding of brush direct current motor can produce certain heat in the circular telegram operation in-process, and some heat transfer gives the motor housing, gives off to the air through the motor housing, and another part heat is blown away the motor under the effect of the inside fan of motor, but along with the operation of motor, inside the motor, the motor surface can both accumulate a large amount of heat, and can not satisfy the heat dissipation needs of motor under long-time operation effectively through the radiating mode that fan heat dissipation and motor housing heat dissipation combined together for the motor exists because of overheated and produces the circumstances of security risk in long-time operation in-process. Therefore, we propose a high-safety brush direct current motor.

Disclosure of Invention

The utility model mainly aims to provide a high-safety brush direct current motor which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the high-safety brush direct current motor comprises a cylinder shell, wherein the front end and the rear end of the cylinder shell are respectively connected with a front cover structure and a rear cover structure, a motor shaft is jointly connected between the front cover structure and the rear cover structure through shaft penetration and movable connection, a rotor, a commutator and a fan are sleeved on the motor shaft, a permanent magnet is connected to the inner wall surface of the cylinder shell, the rotor is positioned at the inner side of the permanent magnet, two sides of the commutator are electrically connected with electric brushes, and the two electric brushes are connected with the inner wall surface of the rear cover structure; the peripheral side rear side rotation cover of back lid structure is equipped with the structure of blowing outward, and the rear end butt of structure of blowing outward has the connecting plate, and the rear end of motor shaft extends to the rear of back lid structure and is connected with the structure transmission of blowing outward, and the connecting plate passes through the bolt and links to each other with the rear end of back lid structure.

Preferably, the rear cover structure comprises a rear cover shell, the rear cover shell is connected to the rear end of the cylinder shell through a bolt, the rear cover shell is movably sleeved on the motor shaft through a bearing, a baffle ring is fixedly sleeved on the peripheral side face of the rear cover shell, the outer blowing structure is rotatably sleeved on the rear cover shell and is abutted to the rear end of the baffle ring, the rear end of the rear cover shell is provided with a vent hole in a penetrating mode, and a support shaft and a connecting seat are fixedly arranged at the rear end of the rear cover shell.

Preferably, the front cover structure comprises a front cover plate, the front cover plate is connected to the front end of the cylinder shell through bolts, a supporting cover and a plurality of heat transfer sheets are fixedly arranged at the front end of the front cover plate in a penetrating mode, radiating fins are fixedly arranged at the front ends of the plurality of heat transfer sheets, and air guide sheets are fixedly arranged at two sides of each radiating fin; the front cover plate is movably sleeved on the motor shaft through a bearing; the plurality of heat transfer sheets are distributed in an annular array with the motor shaft as the center.

Preferably, the rear ends of the heat transfer sheets extend between the permanent magnets and the rotor, the heat dissipation sheets are distributed along the radial direction of the motor shaft, and the air guide sheets are obliquely arranged.

Preferably, the outer blowing structure comprises a supporting ring, and the supporting ring is rotatably sleeved on the rear cover shell and is abutted with the rear end of the baffle ring; the fan blades are fixedly arranged on the outer peripheral side face of the supporting ring, the gear ring is fixedly arranged on the inner side face of the supporting ring, a first gear is meshed with the inner side of the gear ring, a second gear is meshed with one side of the first gear, the first gear is rotatably sleeved on the supporting shaft, and the second gear is fixedly sleeved on the motor shaft.

Preferably, the gear ring is positioned at the rear of the rear cover shell, the fan blades are provided with a plurality of blades and distributed in a ring-shaped array by taking the supporting ring as the center, and the outer sides of the plurality of blades are fixedly connected with the guard ring together.

Preferably, the connecting plate is abutted with the rear end of the supporting ring, and the connecting plate is connected with the connecting seat through bolts.

Preferably, the connecting plate is embedded with a rear filter screen, and the supporting cover is embedded with a front filter screen.

Compared with the prior art, the utility model has the following beneficial effects:

1. when the motor is in operation, the fan and the external blowing structure are driven by the motor shaft to rotate, and the fan rotates to enable air at the inner side of the motor to flow from front to back, so that cold air at the outer side of the motor can be pumped into the motor, hot air at the inner side of the motor can be blown out of the motor, and heat dissipation at the inner side of the motor is achieved; the outer structure of blowing rotates for the outside air of motor flows backward in the past, and flows from the shell surface, accelerates the thermal effluvium on the shell, and can blow away the dust on shell surface, promotes the radiating effect of shell, simultaneously, the air current that forms through the structure of blowing can act on the protecgulum structure, accelerates the thermal effluvium on the protecgulum structure, realizes inside and outside radiating effect.

2. In the front cover structure, the rear end of the heat transfer sheet extends between the permanent magnet and the rotor, and heat generated by the rotor after the rotor is electrified heats air around the rotor, so that the heat transfer sheet heats up, the heat transfer sheet transfers the heat to the radiating sheet, the radiating sheet radiates the heat into the air, the heat inside the motor can be accelerated to radiate into the air outside the motor through the heat transfer sheet and the radiating sheet, and the radiating effect is improved;

3. the air flow formed by the external blowing structure rapidly takes away the heat on the radiating fins in the process of flowing from the surfaces of the radiating fins, so that the heat in the motor can be rapidly transferred to the radiating fins through the heat transfer fins to be rapidly dissipated, the dissipation of the heat in the motor is accelerated, and meanwhile, under the action of the air guide fins, part of the air flow can flow along the radiating fins to the motor shaft, so that the air flow generated by the fan blades can rapidly and efficiently take away the heat on the radiating fins, and the heat dissipation effect is improved;

4. through the structure, the heat dissipation effect inside and outside the motor is enhanced, so that the motor can be effectively prevented from being overheated, the safety of the motor in the use process is effectively improved, and the motor has the advantage of high safety.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a high-safety brush DC motor of the present utility model;

FIG. 2 is a structural development of a high-safety brush DC motor according to the present utility model;

FIG. 3 is a schematic view of a back cover structure of a brush DC motor with high safety according to the present utility model;

fig. 4 is a schematic structural view of a front cover structure of a brush dc motor with high safety according to the present utility model;

fig. 5 is a schematic structural diagram of an external blowing structure of a brush dc motor with high safety according to the present utility model.

In the figure: 1. a cartridge housing; 2. a rear cover structure; 3. a front cover structure; 4. a permanent magnet; 5. a motor shaft; 6. a rotor; 7. a commutator; 8. a brush; 9. a fan; 10. an external blowing structure; 11. a connecting plate; 12. a rear filter screen; 21. a rear cover case; 22. a baffle ring; 23. a vent hole; 24. a support shaft; 25. a connecting seat; 31. a front cover plate; 32. a support cover; 33. a front filter screen; 34. a heat transfer sheet; 35. a heat sink; 36. an air guiding sheet; 101. a support ring; 102. a fan blade; 103. a retainer; 104. a gear ring; 105. a first gear; 106. and a gear II.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-5, a high-safety brush direct current motor comprises a cylinder shell 1, wherein a front cover structure 3 and a rear cover structure 2 are respectively connected to the front end and the rear end of the cylinder shell 1, a motor shaft 5 is jointly connected between the front cover structure 3 and the rear cover structure 2 through shaft penetration and movable connection, a rotor 6, a commutator 7 and a fan 9 are sleeved on the motor shaft 5, a permanent magnet 4 is connected to the inner wall surface of the cylinder shell 1, the rotor 6 is positioned at the inner side of the permanent magnet 4, electric brushes 8 are electrically connected to the two sides of the commutator 7, and the two electric brushes 8 are connected with the inner wall surface of the rear cover structure 2; the rear side of the peripheral side face of the rear cover structure 2 is rotatably sleeved with an external blowing structure 10; the rear end of the motor shaft 5 extends to the rear of the rear cover structure 2 and is in transmission connection with the external blowing structure 10, so that the motor shaft 5 drives the external blowing structure 10 to move when rotating, and blowing and heat dissipation outside the motor are realized; the rear end butt of structure 10 has connecting plate 11 of blowing outward, and connecting plate 11 links to each other with the rear end of back lid structure 2 through the bolt, can make the structure 10 of blowing outward can not break away from back lid structure 2 after the installation, guarantees the normal use of structure 10 of blowing outward.

The application principle and beneficial effects of the technical scheme are as follows: after the two brushes 8 are electrified, current flows into the rotor 6 through the commutator 7, so that the rotor 6 is electrified, and in a magnetic field formed by the permanent magnets 4, the electrified rotor 6 rotates to drive the motor shaft 5 to rotate, so that the fan 9, the commutator 7 and the external blowing structure 10 rotate; the fan 9 rotates to enable air inside the motor to flow from front to back, so that cold air outside the motor can be pumped into the motor, hot air inside the motor can be blown out of the motor, and heat dissipation inside the motor is achieved; the external blowing structure 10 rotates, so that air outside the motor flows from front to back and flows from the surface of the cylinder shell 1, heat dissipation on the cylinder shell 1 is accelerated, the air acts on the front cover structure 3, the front cover structure 3 can transfer heat inside the motor to the outside of the motor, and heat dissipation inside the motor is accelerated; through the structure, heat dissipation inside and outside the motor is realized, and the heat dissipation effect is improved.

The rear cover structure 2 comprises a rear cover shell 21, the rear cover shell 21 is connected to the rear end of the cylinder shell 1 through a bolt, the rear cover shell 21 is movably sleeved on the motor shaft 5 through a bearing, a baffle ring 22 is fixedly sleeved on the peripheral side surface of the rear cover shell 21, the outer blowing structure 10 is rotatably sleeved on the rear cover shell 21 and is abutted to the rear end of the baffle ring 22, a vent hole 23 is formed in the rear end of the rear cover shell 21 in a penetrating mode, and a support shaft 24 and a connecting seat 25 are fixedly arranged at the rear end of the rear cover shell 21.

The front cover structure 3 comprises a front cover plate 31, the front cover plate 31 is connected to the front end of the cylinder shell 1 through bolts, a supporting cover 32 and a plurality of heat transfer sheets 34 are fixedly arranged at the front end of the front cover plate 31 in a penetrating manner, radiating fins 35 are fixedly arranged at the front ends of the plurality of heat transfer sheets 34, and air guide sheets 36 are fixedly arranged at two sides of each radiating fin 35; the front cover plate 31 is movably sleeved on the motor shaft 5 through a bearing; the plurality of heat transfer sheets 34 are distributed in an annular array centering on the motor shaft 5. The rear end of the heat transfer sheet 34 extends between the permanent magnet 4 and the rotor 6, and the heat generated by the rotor 6 after being electrified heats the air around the rotor 6, so that the heat transfer sheet 34 heats up, the heat transfer sheet 34 transfers the heat to the heat dissipation sheet 35, the heat dissipation sheet 35 dissipates the heat into the air, the heat dissipation inside the motor can be accelerated to the air outside the motor through the heat transfer sheet 34 and the heat dissipation sheet 35, and the heat dissipation effect is improved. The cooling fins 35 are distributed along the radial direction of the motor shaft 5, and the air guide fins 36 are obliquely arranged; in a specific embodiment, the air guiding fin 36 is disposed front and back, and the linear distance from the rear end of the air guiding fin 36 to the motor shaft 5 is greater than the linear distance from the front end of the air guiding fin 36 to the motor shaft 5, so that the airflow formed by the action of the fan blades 102 from back to front acts on the air guiding fin 36 and the cooling fin 35, and under the action of the air guiding fin 36, part of the airflow flows along the cooling fin 35 to the motor shaft 5, so that the airflow generated by the fan blades 102 can quickly and efficiently take away the heat on the cooling fin 35, thereby improving the heat dissipation effect.

The external blowing structure 10 comprises a support ring 101, wherein fan blades 102 are fixedly arranged on the outer peripheral side surface of the support ring 101, a gear ring 104 is fixedly arranged on the inner side surface of the support ring 101, a first gear 105 is meshed with the inner side of the gear ring 104, a second gear 106 is meshed with one side of the first gear 105, the first gear 105 is rotatably sleeved on a support shaft 24, the second gear 106 is fixedly sleeved on a motor shaft 5, and the second gear 106 can rotate along with the rotation of the motor shaft 5; through the above, when the motor shaft 5 rotates, the fan 9 rotates along with the motor shaft 5 in the same direction, so that the air inside the motor flows from back to front, the motor shaft 5 drives the second gear 106 to rotate at the same time, the second gear 106 drives the first gear 105 to rotate, the first gear 105 drives the gear ring 104 to rotate, the support ring 101 rotates on the rear cover shell 21, the fan blades 102 rotate, the air outside the motor is pushed from back to front, and the air flow inside and outside the motor flows from back to front at the same time.

The gear ring 104 is positioned at the rear of the rear cover shell 21, the fan blades 102 are provided with a plurality of protection rings 103 which are distributed in an annular array with the supporting ring 101 as the center, the outer sides of the fan blades 102 are fixedly connected with each other, the fan blades 102 rotate to blow air from back to front, air flow outside the motor passes through the surface of the motor quickly, so that heat on the surface of the motor is taken away quickly, the heat dissipation effect is enhanced, meanwhile, air flow blown by the fan blades 102 flows through the surface of the cooling fin 35 to quickly take away heat on the cooling fin 35, so that heat inside the motor can be transferred to the cooling fin 35 through the heat transfer sheet 34 quickly and dissipated quickly, and the heat dissipation inside the motor is accelerated; through the above, the heat dissipation effect inside and outside the motor is enhanced, so that the motor can be effectively prevented from overheating, the safety of the motor in the use process is effectively improved, and the motor has the advantage of high safety.

The connecting plate 11 is abutted with the rear end of the supporting ring 101, the connecting plate 11 is connected with the connecting seat 25 through bolts, and the supporting ring 101 is rotatably sleeved on the rear cover shell 21 and abutted with the rear end of the baffle ring 22; through the above, the supporting ring 101 can not be separated from the rear cover shell 21 when rotating on the rear cover shell 21, so that the normal use of the external blowing structure 10 is ensured. In one embodiment, the connecting seats 25 are provided with three, and each connecting seat 25 is provided with a bolt in a threaded manner, and the connecting plate 11 is stably connected with the connecting seat 25 through the three bolts.

The connecting plate 11 is embedded with the back filter screen 12, the supporting cover 32 is embedded with the front filter screen 33, and when the motor is electrified and operated, the motor shaft 5 drives the fan 9 to rotate, so that air in the motor flows from back to front, the air outside the motor can be filtered by the back filter screen 12 and enter the motor, and air in the motor can be discharged by the front filter screen 33, so that the effects of heat dissipation and dust prevention are realized.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides a high security's brush direct current motor, includes shell (1), its characterized in that: the motor is characterized in that the front end and the rear end of the cylinder shell (1) are respectively connected with a front cover structure (3) and a rear cover structure (2), a motor shaft (5) is jointly connected between the front cover structure (3) and the rear cover structure (2) through shaft insertion and movable connection, a rotor (6), a commutator (7) and a fan (9) are sleeved on the motor shaft (5), a permanent magnet (4) is connected to the inner wall surface of the cylinder shell (1), the rotor (6) is positioned at the inner side of the permanent magnet (4), electric brushes (8) are electrically connected to the two sides of the commutator (7), and the two electric brushes (8) are connected with the inner wall surface of the rear cover structure (2); the rear cover structure (2) is characterized in that an outer blowing structure (10) is sleeved on the rear side of the rear side face of the rear cover structure (2) in a rotating mode, a connecting plate (11) is abutted to the rear end of the outer blowing structure (10), the rear end of the motor shaft (5) extends to the rear of the rear cover structure (2) and is in transmission connection with the outer blowing structure (10), and the connecting plate (11) is connected with the rear end of the rear cover structure (2) through bolts.

2. A high safety brush-fed dc motor as in claim 1, wherein: the rear cover structure (2) comprises a rear cover shell (21), the rear cover shell (21) is connected with the rear end of the cylinder shell (1) through a bolt, the rear cover shell (21) is movably sleeved on the motor shaft (5) through a bearing, a baffle ring (22) is fixedly sleeved on the peripheral side face of the rear cover shell (21), the outer blowing structure (10) is rotatably sleeved on the rear cover shell (21) and is abutted with the rear end of the baffle ring (22), a vent hole (23) is formed in the rear end of the rear cover shell (21), and a support shaft (24) and a connecting seat (25) are fixedly arranged at the rear end of the rear cover shell (21).

3. A high safety brush-fed dc motor as in claim 2, wherein: the front cover structure (3) comprises a front cover plate (31), the front cover plate (31) is connected to the front end of the cylinder shell (1) through bolts, a supporting cover (32) and a plurality of heat transfer sheets (34) are fixedly arranged at the front end of the front cover plate (31) in a penetrating mode, radiating fins (35) are fixedly arranged at the front ends of the plurality of heat transfer sheets (34), and air guide sheets (36) are fixedly arranged at two sides of each radiating fin (35); the front cover plate (31) is movably sleeved on the motor shaft (5) through a bearing; the plurality of heat transfer sheets (34) are distributed in an annular array with the motor shaft (5) as the center.

4. A high safety brush-fed dc motor as in claim 3, wherein: the rear ends of the heat transfer sheets (34) extend between the permanent magnets (4) and the rotor (6), the cooling sheets (35) are distributed along the radial direction of the motor shaft (5), and the air guide sheets (36) are obliquely arranged.

5. The high security brushed dc motor of claim 4, wherein: the outer blowing structure (10) comprises a supporting ring (101), and the supporting ring (101) is rotatably sleeved on the rear cover shell (21) and is abutted with the rear end of the baffle ring (22); the fan blade type motor is characterized in that fan blades (102) are fixedly arranged on the outer peripheral side face of the supporting ring (101), a gear ring (104) is fixedly arranged on the inner side face of the supporting ring (101), a first gear (105) is meshed with the inner side of the gear ring (104), a second gear (106) is meshed with one side of the first gear (105), the first gear (105) is rotatably sleeved on the support shaft (24), and the second gear (106) is fixedly sleeved on the motor shaft (5).

6. The high-safety brushed dc motor of claim 5, wherein: the gear ring (104) is positioned at the rear of the rear cover shell (21), the fan blades (102) are arranged in a plurality of annular arrays with the supporting ring (101) as the center, and the outer sides of the fan blades (102) are fixedly connected with the guard rings (103) together.

7. The high security brushed dc motor of claim 6, wherein: the connecting plate (11) is abutted with the rear end of the supporting ring (101), and the connecting plate (11) is connected with the connecting seat (25) through bolts.

8. The high security brushed dc motor of claim 7, wherein: the connecting plate (11) is embedded with a rear filter screen (12), and the supporting cover (32) is embedded with a front filter screen (33).