CN214124997U

CN214124997U - Small-size motor and fan

Info

Publication number: CN214124997U
Application number: CN202022510629.4U
Authority: CN
Inventors: 许艺青
Original assignee: Xiamen Tungsten Co Ltd
Current assignee: Xiamen Tungsten Co Ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-09-03
Anticipated expiration: 2030-11-03

Abstract

The utility model relates to the technical field of motors, in particular to a motor and a fan with small volume, which comprises a shell, a front end cover arranged on the shell, a rotating shaft penetrating through a through hole of the front end cover and a bearing arranged on the rotating shaft; the outer surface of the front end cover is provided with a bearing cover plate; the periphery of the front end cover through hole is provided with a cylindrical part extending backwards; the rear end of the cylindrical part is provided with a flange extending towards the central axis of the rotating shaft in the radial direction; the bearing is located within the cylindrical portion and its outer race is confined between the flange and a bearing cover plate. The utility model provides a small-size motor, with bearing cover plate set up at the front end housing surface to through flange and bearing cover plate axial fixation single bearing, on the one hand make the operating space of this scheme big, easily install, improved the installation effectiveness of motor; on the other hand, the single bearing is adopted, so that the axial space is reduced, the size of the motor is greatly reduced, the structure of the motor is simplified, and the cost of the motor is reduced.

Description

Small-size motor and fan

Technical Field

The utility model relates to the technical field of motors, in particular to motor and fan of small volume.

Background

The fan is a driven fluid machine which is mainly applied to air heaters, heat pumps, condensers, cooling units, evaporators, electronic equipment air supply or heat dissipation equipment and the like. The existing fans are driven by fan motors to rotate fan blades, so that functions of ventilation, cooling and the like are achieved.

The structure of the fan motor mainly comprises four parts, namely a rotor assembly, a stator assembly and front and rear end covers. Traditional fan motor is shown in fig. 1, and the rotor subassembly contains parts such as pivot, rotor core, magnet steel, preceding balancing ring, preceding rear bearing, axle sleeve, bearing apron, and rotor core both ends are arranged in to preceding balancing ring for do rotor dynamic balance. The front and rear bearings are disposed in the bearing chambers of the front and rear end caps for supporting the rotating shaft. The front and rear bearings are usually installed in a mode that one end of each bearing is fixed and the other end of each bearing floats, a wave spring is required to be installed on the floating end bearing to adjust axial movement, an outer ring of the fixed end bearing is usually fixed by a built-in bearing cover plate and a front end cover, and an inner ring of the fixed end bearing is fixed by a rotating shaft and a shaft sleeve; when the built-in bearing cover plate is installed, the rotating shaft needs to be placed in advance, the front bearing is installed, and finally the bearing cover plate is pulled back to be locked with the front end cover. For example, the motor structure disclosed in the patent with application number 201921910403.4 entitled "motor structure with rotary transformer" in 2019, 11 and 07 is formed by adopting the structural components of the conventional motor.

The bearing cover plate of the traditional motor is usually made of carbon steel, the magnetic steel can attract the bearing cover plate, and the bearing cover plate and the magnetic steel need to be pulled away when the bearing cover plate is locked with the front end cover; on the other hand, the operating space of the front end cover is small, bolt holes of the bearing cover plate and the front end cover are difficult to align, and the assembly efficiency is low. Meanwhile, the traditional structure needs a larger axial space, the volume of the motor is often larger, and the cost is wasted.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of low installation efficiency and large volume of the traditional fan motor mentioned in the prior art, the utility model provides a motor with small volume, which comprises a shell, a front end cover arranged on the shell, a rotating shaft penetrating through a through hole of the front end cover and a bearing arranged on the rotating shaft; the outer surface of the front end cover is provided with a bearing cover plate; the periphery of the front end cover through hole is provided with a cylindrical part extending backwards; the rear end of the cylindrical part is provided with a flange extending towards the central axis of the rotating shaft in the radial direction; the bearing is located within the cylindrical portion and has an outer race axially restrained between the flange and a bearing cover plate.

In addition to the above technical solution, the apparatus further includes a hollow back iron, and the back iron is sleeved on the cylindrical portion; the back iron is further provided with a connecting part connected with the rotating shaft.

On the basis of the technical scheme, furthermore, a first shaft shoulder is arranged at the end part of the rotating shaft, which is far away from the front end cover, so that the connecting part is abutted against the first shaft shoulder.

On the basis of the technical scheme, further, a shaft sleeve is further arranged on the rotating shaft.

On the basis of the technical scheme, a second shoulder is further arranged at one end, far away from the shaft sleeve, of the rotating shaft, so that the inner ring of the bearing is limited between the second shoulder and the shaft sleeve.

On the basis of the technical scheme, a sealing element is arranged between the bearing cover plate and the shaft sleeve.

On the basis of the technical scheme, further, the front end cover is formed with the ladder groove of backward depression, the terminal surface in ladder groove is used for the installation bearing cover plate and the space that it formed can hold completely bearing cover plate.

On the basis of the technical scheme, further, a baffle is further arranged on the outer surface of the front end cover and used for sealing parts on the inner side of the front end cover.

On the basis of the technical scheme, the bearing is a double-row deep groove ball bearing.

The utility model also provides a fan adopts as above arbitrary a motor of little volume.

The utility model provides a pair of motor of little volume compares with prior art, has following advantage: the bearing cover plate is arranged on the outer surface of the front end cover, and the single bearing is axially fixed through the flange and the bearing cover plate, so that on one hand, the scheme has large operation space and is easy to install, the installation efficiency of the motor is improved, and meanwhile, the personal safety is also ensured; on the other hand, the single bearing is adopted, so that the axial space is reduced, the size of the motor is greatly reduced, the structure of the motor is simplified, and the cost of the motor is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic cross-sectional view of a conventional motor in the prior art

Fig. 2 is a schematic cross-sectional structural view of a small-sized motor provided in the present invention;

fig. 3 is a schematic cross-sectional view of the front end cap.

Reference numerals:

10 casing 20 front end cover 30 rotating shaft

40 bearing 50 bearing cover plate 21 cylindrical part

22 flange 70 sleeve 60 back iron

61 coupling 51 seal 31 first shoulder

32 second shoulder 23 stepped groove 80 baffle

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The azimuth term mentioned below means that the rotating shaft extends out of one side of the shell, namely one side close to the front end cover; the rear refers to the side far away from the extending end of the rotating shaft, namely the side close to the rear end cover.

The utility model provides a small-volume motor, which comprises a shell 10, a front end cover 20 arranged on the shell 10, a rotating shaft 30 penetrating through a through hole of the front end cover 20 and a bearing 40 arranged on the rotating shaft 30; the outer surface of the front end cover 20 is provided with a bearing cover plate 50; the periphery of the through hole of the front end cover 20 is provided with a cylindrical part 21 extending backwards; a flange 22 extending radially toward the central axis of the rotating shaft 30 is provided at the rear end of the cylindrical portion 21; the bearing 40 is located within the cylindrical portion 21 and its outer race is axially captured between the flange 22 and a bearing cover plate 50.

In specific implementation, as shown in fig. 2-3, the device includes a casing 10, a front end cover 20 installed on the casing 10, a rotating shaft 30 penetrating through a through hole of the front end cover 20, and a bearing 40 disposed on the rotating shaft 30; the outer surface of the front end cover 20 is provided with a bearing cover plate 50; a cylindrical part 21 extends backwards from the periphery of the through hole of the front end cover 20; a flange 22 extending radially toward the central axis of the rotating shaft 30 is provided at the rear end of the cylindrical portion 21; the bearing 40 is located within the cylindrical portion 21 and its outer race is axially captured between the flange 22 and a bearing cover plate 50. During assembly, the front end cover 20 is sleeved on the rotating shaft 30 in advance, the bearing 40 is installed, and finally the bearing cover plate 50 is locked on the front end cover 20 through threaded connection. This scheme bearing cover plate 50 is installed from the outside, and operating space is big, can not only effectively eliminate the potential safety hazard, has still improved the installation effectiveness greatly.

The utility model provides a motor of small volume sets up the bearing cover plate at the front end housing surface to come the axial fixation single bearing through flange and bearing cover plate, make the operating space of this scheme big on the one hand, easily install, improved the installation effectiveness of motor, also guaranteed the personal safety simultaneously; on the other hand, the single bearing is adopted, so that the axial space is reduced, the size of the motor is greatly reduced, the structure of the motor is simplified, and the cost of the motor is reduced.

Preferably, the device further comprises a hollow back iron 60, wherein the back iron 60 is sleeved on the cylinder part 21; the back iron 60 is further provided with a connecting portion 61 connected with the rotating shaft 30, and the connecting portion 61 is formed by radially extending the rear end of the back iron 60 towards the central axis of the rotating shaft 30.

In a specific implementation, as shown in fig. 2, the motor further includes a hollow back iron 60, and a hollow position of the back iron 60 is sleeved on the cylindrical portion 21; the back iron 60 is further provided with a connecting portion 61 connected with the rotating shaft 30, and the connecting portion 61 is formed by radially extending the rear end of the back iron 60 towards the central axis of the rotating shaft 30. The peripheral wall of the back iron 60 is used for connecting the rotor assembly and is connected with the rotating shaft 30 through a connecting part 61, and the connecting part 61 and the rotating shaft 30 can be connected in an interference fit or screw connection mode. Compared with the traditional motor which adopts the front and rear balance rings for balancing, the scheme cancels the front and rear balance rings, performs dynamic balancing on the back iron 60, and saves a certain axial space; the hollow back iron 60 can enable the cylindrical part 21 of the front end cover 20 to be embedded into the hollow structure, axial space is further saved, and the whole motor structure is more compact on the basis of not influencing performance.

Preferably, the end of the rotating shaft 30 away from the front end cover 20 is provided with a first shoulder 31, so that the connecting portion 61 abuts against the first shoulder 31.

In a specific implementation, as shown in fig. 2, a first shoulder 31 is disposed at an end of the rotating shaft 30 away from the front end cover 20, so that a front end of the connecting portion 61 abuts against the first shoulder 31. By the design of the invention, the axial displacement of the back iron 60 is limited, a wave spring for adjusting the axial movement is omitted, and various parts and structures required by the installation of the bearing at the floating end, such as a spigot and a bearing chamber positioned at the rear end cover, are eliminated, so that the volume of the motor is further reduced, and the assembly process is simplified.

Preferably, a shaft sleeve 70 for abutting against the inner ring of the bearing 40 is further disposed on the rotating shaft 30.

In a specific implementation, as shown in fig. 2, a shaft sleeve 70 is further disposed on the rotating shaft 30 for axially fixing an inner ring of the bearing 40.

Preferably, the shaft 30 is provided with a second shoulder 32 at an end remote from the sleeve 70, so that the inner race of the bearing 40 is confined between the second shoulder 32 and the sleeve 70.

In a specific implementation, a second shoulder 32 is disposed at an end of the rotating shaft 30 away from the shaft sleeve 70, and a diameter of the second shoulder 32 is greater than an inner diameter of an inner ring of the bearing 40. When the bearing is installed, the second shoulder 32 abuts against the inner ring of the bearing 40, and the inner ring of the bearing 40 is axially fixed through the second shoulder 32 and the shaft sleeve 70.

Preferably, a sealing member 51 is disposed between the bearing cover plate 50 and the shaft sleeve 70.

In specific implementation, a sealing element 51 is arranged between the bearing cover plate 50 and the shaft sleeve 70, and as a preferable scheme, the sealing element 51 adopts a lip labyrinth sealing ring for enhancing the sealing performance of an oil path and preventing the leakage of grease.

Preferably, the front end cover 20 is formed with a stepped groove 23 recessed rearward, an end surface of the stepped groove 23 is used for mounting the bearing cover plate 50, and a space formed by the stepped groove 23 can completely accommodate the bearing cover plate 50.

In specific implementation, the front end cover 20 is formed with an inward recessed stepped groove 23, and an end surface of the stepped groove 23 may be connected to the bearing cover plate 50 by screws. Compare in traditional motor bearing housing's hookup location be difficult to the operation, this scheme is through the ladder groove 23 that forms in front end housing 20 for bearing housing 50's installation is more convenient, has improved the installation effectiveness. On the other hand, the bearing end cover 50 can be completely hidden in the front end cover 20 by the formed space, the integral appearance of the motor is not influenced, and the space is reasonably utilized to enable the structure to be more compact.

Preferably, the outer surface of the front end cap 20 is further provided with a baffle 80, and the baffle 80 is used for covering parts inside the front end cap 20.

In specific implementation, as shown in fig. 2, a baffle 80 is further disposed on an outer surface of the front end cover 20, and the baffle 80 is used for covering parts inside the front end cover 20 to achieve a dustproof protection effect.

Preferably, the bearing 40 is a double row deep groove ball bearing.

During specific implementation, the single bearing 40 adopts the double-row deep groove ball bearing, on one hand, corresponding matching structures and matching parts of two bearings in the traditional motor structure are reduced, and on the other hand, the double-row deep groove ball bearing is suitable for occasions with high precision and high rotating speed and can bear large radial load and certain axial load.

When specifically implementing, adopting the utility model discloses on the basis of motor, constitute the structure of fan through the mode of overlapping at motor shaft 30 outer pot head and being equipped with the impeller. Preferably, the outer end of the shaft 30 of the motor is keyed to secure the impeller. The fan adopting the motor has the advantages of compact structure and small volume, reduces the occupied space and greatly reduces the production cost of the fan.

Although terms such as housing, front end cap, bearing cover plate, shaft, bearing, cylindrical portion, back iron, flange, connection portion, first shoulder, second shoulder, bushing, stepped groove, seal, baffle, etc., are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a motor of little volume, includes casing (10), installs front end housing (20) on casing (10), wears to locate pivot (30) of front end housing (20) through-hole and sets up bearing (40) on pivot (30), its characterized in that:

a bearing cover plate (50) is arranged on the outer surface of the front end cover (20); the periphery of the through hole of the front end cover (20) is provided with a cylindrical part (21) extending backwards; a flange (22) extending radially toward the central axis of the rotating shaft (30) is provided at the rear end of the cylindrical portion (21); the bearing (40) is located within the cylindrical portion (21) and has an outer race axially restrained between the flange (22) and a bearing cover plate (50).

2. A small-sized motor according to claim 1, wherein: the back iron (60) is hollow, and the back iron (60) is sleeved on the cylindrical part (21); the back iron (60) is further provided with a connecting part (61) connected with the rotating shaft (30).

3. A small-sized motor according to claim 2, wherein: the end part, far away from the front end cover (20), of the rotating shaft (30) is provided with a first shaft shoulder (31), so that the connecting part (61) is abutted against the first shaft shoulder (31).

4. A small-sized motor according to claim 1, wherein: and the rotating shaft (30) is also provided with a shaft sleeve (70) used for propping against the inner ring of the bearing (40).

5. A low-volume electric machine according to claim 4, characterized in that: the rotating shaft (30) is provided with a second shoulder (32) at one end away from the shaft sleeve (70), so that the inner ring of the bearing (40) is limited between the second shoulder (32) and the shaft sleeve (70).

6. A small-sized motor according to claim 4 or 5, wherein: and a sealing element (51) is arranged between the bearing cover plate (50) and the shaft sleeve (70).

7. A small-sized motor according to claim 1, wherein: front end housing (20) are formed with backward sunken ladder groove (23), the terminal surface in ladder groove (23) is used for the installation bearing apron (50) and the space that it formed can hold completely bearing apron (50).

8. A small-sized motor according to claim 7, wherein: the outer surface of the front end cover (20) is further provided with a baffle (80), and the baffle (80) is used for sealing parts on the inner side of the front end cover (20).

9. A small-sized motor according to claim 1, wherein: the bearing (40) is a double-row deep groove ball bearing.

10. A fan, its characterized in that: a small-sized motor according to any one of claims 1 to 9 is used.