CN222638276U - An impurity-proof heat dissipation structure for an outer rotor motor protection cylinder - Google Patents

Abstract

The utility model discloses an impurity-proof heat dissipation structure of an outer rotor motor protective cylinder, comprising a cylindrical protective cylinder with a receiving cavity, the protective cylinder comprising a cylinder wall and a first end face and a second end face; a plurality of first heat dissipation grooves are provided on a side of the first end face close to the cylinder wall; a second heat dissipation groove is provided on a side of the cylinder wall close to the first end face; the first heat dissipation groove and the second heat dissipation groove are jointly arranged to form an L-shaped hole, and the second heat dissipation groove is connected to the receiving cavity through the first heat dissipation groove. The utility model firstly plays the role of a heat dissipation hole by providing the second heat dissipation groove on the cylinder wall and the first heat dissipation groove on the first end face, and making the first heat dissipation groove and the second heat dissipation groove jointly arranged to form an L-shaped hole; at the same time, when external impurities want to enter the protective cylinder through the L-shaped hole, the entry path needs to go through a bend of about 90°, which greatly increases the difficulty of impurities entering the receiving cavity, and effectively plays the role of preventing impurities.

Description

Impurity-preventing heat radiation structure of outer rotor motor protection cylinder

[ Field of technology ]

The utility model relates to the technical field of motors, in particular to an impurity-preventing heat-dissipating structure of an outer rotor motor protection cylinder.

[ Background Art ]

The existing external rotor brushless motor is generally provided with two bearings on a motor cover of a fixed stator, and the tail end of a rotor cannot be provided with the bearings to fix the rotor, so that the stress of a motor shaft is uneven, the rotor can swing in the rotating process, the motor is unstable in operation and noise is generated, the abrasion of the motor is aggravated, and the service life of the motor is shortened. Therefore, in the prior art, a protection cylinder structure is arranged, so that one end of a motor shaft is connected to the protection cylinder, and the stability of the motor is improved.

However, after the protection cylinder structure is increased, the heat dissipation difficulty of the motor is increased, and meanwhile, if heat is dissipated in a mode of forming a plurality of heat dissipation holes in the cylinder wall of the protection cylinder, external impurities are easily led to enter the motor through the heat dissipation holes, so that the operation of the motor is hindered.

In view of the foregoing, it is desirable to provide an impurity-preventing and heat-dissipating structure for an outer rotor motor protection cartridge to overcome the above-mentioned drawbacks.

[ utility model ]

The utility model aims to provide an impurity-preventing heat-dissipating structure of an outer rotor motor protection cylinder, which aims to solve the problem that a heat-dissipating hole of the existing outer rotor motor protection cylinder is easy to fall into impurities and improve the running stability of an outer rotor motor.

In order to achieve the above purpose, the utility model provides an impurity-preventing and heat-dissipating structure of an outer rotor motor protection cylinder, which comprises a cylindrical protection cylinder with a containing cavity, wherein the protection cylinder comprises a cylinder wall, a first end face and a second end face which are respectively positioned on two opposite sides of the cylinder wall, a plurality of first heat-dissipating grooves are formed in one side, close to the cylinder wall, of the first end face, a second heat-dissipating groove which is in one-to-one correspondence with the first heat-dissipating grooves is formed in one side, close to the first end face, of the cylinder wall, L-shaped holes are formed by surrounding the first heat-dissipating grooves and the second heat-dissipating grooves together, and the second heat-dissipating grooves are communicated with the containing cavity through the first heat-dissipating grooves.

In a preferred embodiment, the opening direction of the first heat dissipation groove is arranged along the radial direction and penetrates through the side wall along the axial direction, the opening direction of the second heat dissipation groove is arranged along the axial direction and penetrates through the side wall along the radial direction, and the height of the bottom of the second heat dissipation groove relative to the second end face is lower than the height of the first end face relative to the second end face.

In a preferred embodiment, the first heat dissipation groove comprises a first bottom wall and first side walls extending from two sides of the first bottom wall, the second heat dissipation groove comprises a second bottom wall and second side walls extending from two sides of the second bottom wall, and the first side walls and the second side walls on the same side are located on the same plane.

In a preferred embodiment, the first sidewall extends radially and the second sidewall extends axially.

In a preferred embodiment, the first bottom wall extends in the circumferential direction of the first end face.

In a preferred embodiment, the distance between the two first side walls increases from inside to outside.

In a preferred embodiment, a bearing hole is formed in the center of the first end face, and the bearing hole is used for installing a bearing for the outer rotor motor to penetrate.

In a preferred embodiment, a cover plate is further arranged on the side, away from the second end face, of the first end face, and is used for closing the position, located at the first end face, of the first heat dissipation groove.

According to the impurity-preventing heat-dissipating structure of the outer rotor motor protection cylinder, the second heat-dissipating groove is formed in the cylinder wall, the first heat-dissipating groove is formed in the first end face in a surrounding mode, the first heat-dissipating groove and the second heat-dissipating groove are formed in the surrounding mode to form the L-shaped hole, the heat-dissipating hole is formed first, meanwhile, when external impurities enter the protection cylinder through the L-shaped hole, the entering path needs to be bent by about 90 degrees, the difficulty of the impurities entering the accommodating cavity is greatly increased, and the impurity-preventing effect is effectively achieved.

[ Description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of an impurity-preventing heat-dissipating structure of an outer rotor motor protection cylinder provided by the utility model;

fig. 2 is a longitudinal sectional view of an impurity-preventing heat-dissipating structure of the outer rotor motor protection cartridge of fig. 1;

Fig. 3 is an enlarged view of the inside of the ring a of the impurity-preventing and heat-dissipating structure of the outer rotor motor protection cartridge of fig. 2.

In the figure, the reference number is 100, the impurity-proof heat dissipation structure of the outer rotor motor protection cylinder, 1, the protection cylinder, 101, the accommodating cavity, 102 and the bearing hole;

10. a first end face, 11, a first heat dissipation groove, 111, a first bottom wall, 112, a first side wall;

20. A second end face;

30. 31, a second heat dissipation groove, 311, a second bottom wall, 312, a second side wall;

40. And a cover plate.

[ Detailed description ] of the invention

In order to make the objects, technical solutions and advantageous technical effects of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is intended to illustrate the utility model, and not to limit the utility model.

It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In the embodiment of the utility model, the impurity-preventing and heat-dissipating structure 100 of the outer rotor motor protection cylinder is provided for protecting the outer rotor motor, and can effectively prevent external impurities from entering the protection cylinder through the heat-dissipating hole structure while having a heat-dissipating function, thereby preventing the impurities from obstructing or interfering the operation of the outer rotor motor.

As shown in fig. 1 and 2, the impurity-preventing and heat-dissipating structure 100 of the outer rotor motor protection cylinder includes a cylindrical protection cylinder 1 having a receiving chamber 101. The housing chamber 101 is used for housing an external rotor motor (not shown in the drawings).

The protection cylinder 1 comprises a cylinder wall 30, and a first end surface 10 and a second end surface 20 respectively positioned on two opposite sides of the cylinder wall 30. That is, the cylinder wall 30 is a cylindrical surface, and the first end surface 10 and the second end surface 20 are respectively circular surfaces on both sides of the cylinder wall 30.

A plurality of first heat dissipation grooves 11 are formed in one side, close to the cylinder wall 30, of the first end face 10. In the present embodiment, the opening direction of the first heat dissipation groove 11 is set in the radial direction, and the side surface is penetrated in the axial direction. The opening of the first heat dissipation groove 11 faces the cylinder wall 30, and a through hole structure is formed, so that the first heat dissipation groove 11 has a heat dissipation function.

The side of the cylinder wall 30 near the first end surface 10 is provided with second heat dissipation grooves 31 which are in one-to-one correspondence with the first heat dissipation grooves 11. In the present embodiment, the opening direction of the second heat dissipation groove 31 is set along the axial direction, and the sidewall is penetrated along the radial direction. Wherein the opening of the second heat sink 31 is towards the first end face 10.

Therefore, as shown in fig. 3, the opening direction of the first heat dissipation groove 11 is perpendicular to the opening direction of the second heat dissipation groove 31, and the height of the bottom of the second heat dissipation groove 31 relative to the second end surface 20 is lower than the height of the first end surface 10 relative to the second end surface 20, so that the first heat dissipation groove 11 and the second heat dissipation groove 31 together enclose to form an L-shaped hole. The central axis of the L-shaped hole, which is communicated with the external section, is arranged along the radial direction, and the central axis of the section, which is communicated with the accommodating cavity 101, is arranged along the axial direction. The second heat dissipation groove 31 communicates with the housing chamber 101 through the first heat dissipation groove 11.

Specifically, the first heat dissipation groove 11 includes a first bottom wall 111 and first side walls 112 extending from two sides of the first bottom wall 111, so as to form a U-shaped groove. The second heat dissipation groove 31 includes a second bottom wall 311 and second side walls 312 extending from two sides of the second bottom wall 311, and also forms a U-shaped groove. Wherein the first sidewall 112 and the second sidewall 312 on the same side are located on the same plane, i.e. the sidewall of the first sidewall 112 is reused for the second sidewall 312.

Further, the side of the first end face 10 far away from the second end face 20 is further provided with a cover plate 40, and the cover plate 40 is used for closing the position of the first heat dissipation groove 11 located at the first end face 10, so that external impurities can only enter the hole structure formed by the second bottom wall 311, the cover plate 40 and the two second side walls 312 in a surrounding mode, and then enter the accommodating cavity 101 through the hole part of the first heat dissipation groove 11 after being bent for 90 degrees, and therefore the difficulty of entering the accommodating cavity 101 by the external impurities is high, and meanwhile the outward discharge of hot air in the accommodating cavity 101 is not influenced.

Further, the first sidewall 112 extends radially and the second sidewall 312 extends axially. The first bottom wall 111 extends in the circumferential direction of the first end face 10. The distance between the two first side walls 112 is continuously increased from inside to outside, so that a horn mouth structure is formed, and hot air is conveniently discharged.

In one embodiment, the center of the first end surface 10 is provided with a bearing hole 102, and the bearing hole 102 is used for installing a bearing for the outer rotor motor to pass through, so that one end of the motor shaft is connected to the bearing in the bearing hole 102, and the running stability of the motor is improved.

In summary, according to the impurity-preventing heat dissipation structure 100 of the outer rotor motor protection cylinder provided by the utility model, the second heat dissipation groove 31 is formed in the cylinder wall 30, the first heat dissipation groove 11 is formed in the first end face 10, and the first heat dissipation groove 11 and the second heat dissipation groove 31 are surrounded together to form an L-shaped hole, so that the effect of the heat dissipation hole is achieved at first, and meanwhile, when external impurities enter the protection cylinder 1 through the L-shaped hole, the entering path needs to be bent by about 90 degrees, so that the difficulty of the impurities entering the accommodating cavity 101 is greatly increased, and the impurity-preventing effect is effectively achieved.

The present utility model is not limited to the details and embodiments described herein, and thus additional advantages and modifications may readily be made by those skilled in the art, without departing from the spirit and scope of the general concepts defined in the claims and the equivalents thereof, and the utility model is not limited to the specific details, representative apparatus and illustrative examples shown and described herein.

Claims (8)

1. The impurity-preventing heat dissipation structure of the outer rotor motor protection cylinder is characterized by comprising a cylindrical protection cylinder with a containing cavity, wherein the protection cylinder comprises a cylinder wall, a first end face and a second end face which are respectively positioned on two opposite sides of the cylinder wall, a plurality of first heat dissipation grooves are formed in one side, close to the cylinder wall, of the first end face, a second heat dissipation groove which corresponds to the first heat dissipation grooves one by one is formed in one side, close to the first end face, of the cylinder wall, L-shaped holes are formed in the first heat dissipation grooves and the second heat dissipation grooves in a surrounding mode, and the second heat dissipation grooves are communicated with the containing cavity through the first heat dissipation grooves.

2. The impurity-preventing heat dissipation structure of an outer rotor motor protection cylinder as set forth in claim 1, wherein the opening direction of the first heat dissipation groove is set radially and penetrates the side wall in the axial direction, the opening direction of the second heat dissipation groove is set axially and penetrates the side wall in the radial direction, and the height of the bottom of the second heat dissipation groove with respect to the second end face is lower than the height of the first end face with respect to the second end face.

3. The impurity-preventing and heat-dissipating structure of an outer rotor motor protection cylinder as set forth in claim 1, wherein said first heat-dissipating groove comprises a first bottom wall and first side walls extending from both sides of said first bottom wall, said second heat-dissipating groove comprises a second bottom wall and second side walls extending from both sides of said second bottom wall, and said first side walls and said second side walls on the same side are on the same plane.

4. An impurity-preventing and heat-dissipating structure of an outer rotor motor protection cartridge according to claim 3, wherein the first side wall extends in a radial direction and the second side wall extends in an axial direction.

5. An outer rotor motor protection cartridge according to claim 3, wherein the first bottom wall extends in a circumferential direction of the first end surface.

6. An outer rotor motor protection cartridge according to claim 3, wherein the distance between the two first side walls increases from inside to outside.

7. The impurity-preventing and heat-dissipating structure of an outer rotor motor protection cylinder as set forth in claim 1, wherein a bearing hole is provided in the center of the first end surface, the bearing hole being for mounting a bearing through which the outer rotor motor is inserted.

8. The impurity-preventing and heat-dissipating structure of an outer rotor motor protection cylinder as set forth in claim 1, wherein a cover plate is further provided on a side of the first end surface remote from the second end surface, the cover plate being for closing a portion of the first heat-dissipating groove located at the first end surface.