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

Abstract

The utility model discloses an impurity-proof heat radiation structure of an external rotor motor protection cylinder, which comprises a cylindrical protection cylinder with an accommodating cavity, and the protection cylinder comprises a cylinder wall, a first end face and a second end face. A plurality of first heat dissipation grooves are formed in the side, close to the cylinder wall, of the first end face. A second heat dissipation groove is formed in the side, close to the first end face, of the cylinder wall. The first heat dissipation groove and the second heat dissipation groove jointly define an L-shaped hole, and the second heat dissipation groove is communicated with the containing cavity through the first heat dissipation groove. The second heat dissipation grooves are formed in the cylinder wall, the first heat dissipation grooves are formed in the first end face, and the first heat dissipation grooves and the second heat dissipation grooves jointly define the L-shaped holes, so that firstly, the function of heat dissipation holes is achieved; 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 that the impurities enter the containing cavity is greatly increased, and the impurity prevention effect is effectively achieved.

Description

[Technical field]

[0001] The utility model relates to the technical field of motors, in particular to an impurity-proof heat dissipation structure of an outer rotor motor protection cylinder. [Background technology]

[0002] The existing outer rotor brushless motor generally has two bearings set on the motor cover that fixes the stator, and the end of the rotor is not designed with a bearing to fix the rotor, which leads to uneven force on the motor shaft, and the rotor will swing during the rotation process, making the motor unstable and noisy, and also increasing the wear of the motor and shortening the service life of the motor. Therefore, in the prior art, a protective tube structure is set up to connect one end of the motor shaft to the protective tube, thereby improving the stability of the motor.

[0003] However, the addition of the protective tube structure increases the difficulty of heat dissipation of the motor. At the same time, if heat is dissipated by opening a plurality of heat dissipation holes in the tube wall of the protective tube, it is easy for external impurities to enter the motor through these heat dissipation holes, thereby hindering the operation of the motor.

[0004] In view of this, it is necessary to provide an impurity-proof heat dissipation structure for an outer rotor motor protection cylinder to overcome the above-mentioned defects. [Contents of the utility model]

[0005] The utility model aims to provide an impurity-proof heat dissipation structure of an outer rotor motor protection cylinder, aiming to improve the problem that impurities are easily dropped into the heat dissipation holes of the existing outer rotor motor protection cylinder, and improve the operating stability of the outer rotor motor.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an impurity-proof heat dissipation structure of an outer rotor motor protective cylinder, including a cylindrical protective cylinder with a receiving cavity, the protective cylinder including a cylinder wall and a first end face and a second end face respectively located on opposite sides of the cylinder wall; 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 corresponding to the first heat dissipation grooves is provided on a side of the cylinder wall close to the first end face; the first heat dissipation grooves and the second heat dissipation grooves 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.

[0007] In a preferred embodiment, the opening direction of the first heat dissipation groove is arranged radially, and the side wall is penetrated in the axial direction; the opening direction of the second heat dissipation groove is arranged axially, and the side wall is penetrated in the radial direction; 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.

[0008] In a preferred embodiment, the first heat dissipation groove includes a first bottom wall and first side walls extending from both sides of the first bottom wall; the second heat dissipation groove includes a second bottom wall and second side walls extending from both sides of the second bottom wall; the first side wall and the second side wall on the same side are located on the same plane.

[0009] In a preferred embodiment, the first side wall extends in a radial direction, and the second side wall extends in an axial direction.

[0010] In a preferred embodiment, the first bottom wall extends along the circumference of the first end surface.

[0011] In a preferred embodiment, the distance between the two first side walls increases continuously from the inside to the outside.

[0012] In a preferred embodiment, a bearing hole is provided at the center of the first end surface, and the bearing hole is used to install a bearing for the outer rotor motor to pass through.

[0013] In a preferred embodiment, a cover plate is further provided on a side of the first end surface away from the second end surface, and the cover plate is used to close a portion of the first heat dissipation slot located at the first end surface.

[0014] The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder provided by the utility model has a second heat dissipation groove on the cylinder wall and a first heat dissipation groove on the first end face, and the first heat dissipation groove and the second heat dissipation groove are jointly arranged to form an L-shaped hole, which firstly plays the role of a heat dissipation hole; at the same time, when external impurities want to enter the protection 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 effect of preventing impurities.

Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A three-dimensional diagram of the impurity-proof heat dissipation structure of the outer rotor motor protection cylinder provided by the utility model;

[0017] Figure 2 for Figure 1 A longitudinal cross-sectional view of the impurity-proof heat dissipation structure of the outer rotor motor protection cylinder shown;

[0018] Figure 3 for Figure 2The enlarged view of the circle A in the anti-impurity and heat dissipation structure of the outer rotor motor protection cylinder is shown.

[0019] Reference numerals in the figure: 100, impurity-proof heat dissipation structure of the outer rotor motor protection cylinder; 1, protection cylinder; 101, receiving cavity; 102, bearing hole;

[0020] 10. first end surface; 11. first heat dissipation slot; 111. first bottom wall; 112. first side wall;

[0021] 20. a second end surface;

[0022] 30, cylinder wall; 31, second heat dissipation slot; 311, second bottom wall; 312, second side wall;

[0023] 40. Cover plate. [Specific implementation method]

[0024] In order to make the purpose, technical solution and beneficial technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.

[0025] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] In an embodiment of the utility model, an anti-impurity heat dissipation structure 100 of an outer rotor motor protection cylinder is provided, which is used to protect the outer rotor motor. While having the heat dissipation function, it can effectively prevent external impurities from entering the protection cylinder through the heat dissipation hole structure, thereby preventing impurities from obstructing or interfering with the operation of the outer rotor motor.

[0028] like Figure 1 and Figure 2 As shown, the impurity-proof heat dissipation structure 100 of the outer rotor motor protection cylinder comprises a cylindrical protection cylinder 1 having a receiving cavity 101. The receiving cavity 101 is used to receive the outer rotor motor (not shown in the figure).

[0029] The protection tube 1 comprises a tube wall 30 and a first end surface 10 and a second end surface 20 respectively located at two opposite sides of the tube wall 30. That is, the tube wall 30 is a cylindrical surface, and the first end surface 10 and the second end surface 20 are circular surfaces at two sides of the tube wall 30 respectively.

[0030] A plurality of first heat dissipation slots 11 are provided on one side of the first end surface 10 close to the barrel wall 30. In this embodiment, the opening direction of the first heat dissipation slots 11 is arranged along the radial direction, and the side surface is penetrated along the axial direction. The opening of the first heat dissipation slots 11 faces the barrel wall 30, and a through-hole structure is formed, so that the first heat dissipation slots 11 play a heat dissipation function.

[0031] A second heat dissipation slot 31 corresponding to the first heat dissipation slot 11 is provided on one side of the cylinder wall 30 close to the first end face 10. In this embodiment, the opening direction of the second heat dissipation slot 31 is arranged along the axial direction and penetrates the side wall in the radial direction. The opening of the second heat dissipation slot 31 faces the first end face 10.

[0032] Therefore, combined with Figure 3 As shown, the opening direction of the first heat dissipation slot 11 is perpendicular to the opening direction of the second heat dissipation slot 31, and the height of the bottom of the second heat dissipation slot 31 relative to the second end face 20 is lower than the height of the first end face 10 relative to the second end face 20, so that the first heat dissipation slot 11 and the second heat dissipation slot 31 are jointly surrounded to form an L-shaped hole. The central axis of the L-shaped hole that is connected to the outside is arranged radially, and the central axis of the L-shaped hole that is connected to the receiving cavity 101 is arranged axially. Among them, the second heat dissipation slot 31 is connected to the receiving cavity 101 through the first heat dissipation slot 11.

[0033] Specifically, the first heat dissipation slot 11 includes a first bottom wall 111 and first side walls 112 extending from both sides of the first bottom wall 111, forming a U-shaped slot. The second heat dissipation slot 31 includes a second bottom wall 311 and second side walls 312 extending from both sides of the second bottom wall 311, also forming a U-shaped slot. The first side wall 112 and the second side wall 312 on the same side are located on the same plane, that is, the side wall of the first side wall 112 is reused for the second side wall 312.

[0034] Furthermore, a cover plate 40 is provided on the side of the first end face 10 away from the second end face 20. The cover plate 40 is used to close the portion of the first heat dissipation slot 11 located at the first end face 10, so that external impurities can only first enter the hole structure formed by the second bottom wall 311, the cover plate 40, and the two second side walls 312, and then enter the receiving cavity 101 through the hole portion of the first heat dissipation slot 11 after bending 90°. Therefore, it is more difficult for external impurities to enter the receiving cavity 101, and at the same time, it will not affect the discharge of hot air in the receiving cavity 101 to the outside.

[0035] Furthermore, the first side wall 112 extends radially, and the second side wall 312 extends axially. The first bottom wall 111 extends circumferentially of the first end surface 10. The distance between the two first side walls 112 increases from inside to outside, thereby forming a bell-mouth structure to facilitate the discharge of hot air.

[0036] In one embodiment, a bearing hole 102 is opened at the center of the first end surface 10, and the bearing hole 102 is used to install 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, thereby improving the stability of the motor operation.

[0037] To summarize, the impurity-proof heat dissipation structure 100 of the outer rotor motor protection cylinder provided by the utility model, by opening a second heat dissipation groove 31 on the cylinder wall 30 and a first heat dissipation groove 11 on the first end face 10, and the first heat dissipation groove 11 and the second heat dissipation groove 31 are jointly arranged to form an L-shaped hole, which first plays the role of a heat dissipation hole; at the same time, when external impurities want to enter the protective cylinder 1 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 101, and effectively plays the effect of preventing impurities.

[0038] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. An impurity-proof heat dissipation structure of an outer rotor motor protection cylinder, characterized in that: It comprises a cylindrical protective tube with a receiving cavity, wherein the protective tube comprises a tube wall and a first end face and a second end face respectively located on opposite sides of the tube wall; a plurality of first heat dissipation grooves are provided on a side of the first end face close to the tube wall; a second heat dissipation groove corresponding to the first heat dissipation grooves is provided on a side of the tube wall close to the first end face; the first heat dissipation grooves and the second heat dissipation grooves 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.

2. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 1, characterized in that: The opening direction of the first heat dissipation groove is arranged radially and penetrates the side wall along the axial direction; the opening direction of the second heat dissipation groove is arranged axially and penetrates the side wall along the radial direction; 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.

3. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 1, characterized in that: The first heat dissipation slot includes a first bottom wall and first side walls extending from both sides of the first bottom wall; the second heat dissipation slot includes a second bottom wall and second side walls extending from both sides of the second bottom wall; the first side wall and the second side wall on the same side are located on the same plane.

4. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 3, characterized in that: The first side wall extends in a radial direction, and the second side wall extends in an axial direction.

5. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 3, characterized in that: The first bottom wall extends along a circumferential direction of the first end surface.

6. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 3, characterized in that: The distance between the two first side walls increases continuously from the inside to the outside.

7. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 1, characterized in that: A bearing hole is provided at the center of the first end surface, and the bearing hole is used to install a bearing for the outer rotor motor to pass through.

8. The impurity-proof heat dissipation structure of the outer rotor motor protection cylinder according to claim 1, characterized in that: A cover plate is further provided on a side of the first end surface away from the second end surface, and the cover plate is used to close a portion of the first heat dissipation slot located at the first end surface.

Images