Motor for cooling fan

Abstract

The utility model discloses a motor for a cooling fan. The motor comprises a main shell, a gland, an inner shell assembly, an upper backing ring and a lower backing ring sleeve, wherein a cavity with an opening in one end is formed in the main shell; the gland is provided with a containing cavity with an opening facing the main shell, and the gland is connected with the main shell in a buckled mode; protruding cylinders are evenly distributed at the bottom of the containing cavity. The inner shell assembly comprises an inner shell and an inner cover which are connected into a whole and are used for mounting the rotor, and the inner shell assembly is fixedly accommodated in a space formed by the cavity and the accommodating cavity; the outer end of the inner cover axially extends to form a circular truncated cone, and a plurality of ribs are circumferentially and uniformly distributed on the outer wall of the circular truncated cone and are longitudinally parallel to the axis of the rotor; the two ends of the upper backing ring abut against the adjacent end faces of the containing cavity and the inner cover correspondingly; the upper backing ring is an elastic body with set hardness, and grooves matched with the ribs are formed in the inner wall of the upper backing ring; the cylinder is elastically pressed into the end face of the upper backing ring; the lower backing ring is sleeved with the cavity, and the two ends of the lower backing ring abut against the adjacent ends of the inner shell and the cavity respectively.

Description

Technical Field

[0001] This application relates to the field of cooling fan technology, specifically to a motor for a cooling fan. Background Technology

[0002] Existing cooling fans consist of a motor, blades mounted on the motor's output shaft, and other accessories. The various components of the motor and the motor itself are usually connected to external parts using fasteners such as bolts. During assembly, these fasteners need to be tightened, resulting in numerous steps, low installation efficiency, poor vibration reduction, and high noise levels. Therefore, further improvements are necessary. Summary of the Invention

[0003] The purpose of this application is to provide a motor for a cooling fan to solve the problems in the prior art.

[0004] To achieve the above objectives, this application provides the following technical solution: a motor for a cooling fan, comprising:

[0005] The main shell 1 forms a cavity 102 with one end open;

[0006] The pressure cap 7 has a receiving cavity 701 that opens toward the main housing 1, and the pressure cap 7 is fastened to the main housing 1; the bottom of the receiving cavity 701 has evenly distributed protruding cylinders 702.

[0007] The inner shell assembly includes an inner shell 4 and an inner cover 5 connected as a whole for mounting the rotor 2. The inner shell assembly is fixedly housed in the space formed by the cavity 102 and the receiving cavity 701. The outer end of the inner cover 5 extends axially to form a frustum 502. A plurality of ribs 503 are evenly distributed around the outer wall of the frustum 502. The ribs 503 are parallel to the axis of the rotor 2 in the longitudinal direction.

[0008] The upper gasket 6 is sleeved on the frustum 502 and its two ends abut against the adjacent end faces of the receiving cavity 701 and the inner cover 5, respectively; the upper gasket 6 is an elastic body with a set hardness, and the inner wall is formed with a groove 601 that is adapted to the rib 503; the cylinder 702 is elastically pressed into the end face of the upper gasket 6.

[0009] The lower pad ring 3 is installed inside the cavity 102, with its two ends abutting against the inner shell 4 and the adjacent ends of the cavity 102, respectively.

[0010] Furthermore, the inner housing 4 includes:

[0011] Inner sleeve 402, the inner wall is used to install magnets and cooperate with the rotor 2;

[0012] Reinforcing sleeve 401 is fastened to the outer wall of the inner sleeve 402;

[0013] The inner sleeve 402 extends axially toward the cavity 102 and protrudes from the reinforcing sleeve 401 to form a riveting protrusion 404 and a support portion 405. The inner sleeve 402 extends axially toward the inner cover 5 and protrudes from the reinforcing sleeve 401 to form a riveting finger 406.

[0014] The outer wall of the inner cover 5 has a radially protruding protrusion 501 for riveting with the riveting finger 406;

[0015] The front cover 403 is riveted to the inner sleeve 402 via the riveting protrusion 404;

[0016] The front cover 403 and the inner cover 5 are coaxially formed with bearing positions 8 to accommodate the bearings 9 on the rotor 2.

[0017] Furthermore, the inner wall of the inner cover 5 is also provided with an axially extending inner tongue 504 that contacts and engages with the inner wall of the inner sleeve 402, and the outer wall of the inner cover 5 is also provided with an axially extending outer tongue 505 that contacts and engages with the outer wall of the inner sleeve 402.

[0018] Furthermore, the outer wall of the main housing 1 is evenly provided with fastening platforms 101, and the end of the pressure cover 7 facing the main housing 1 is formed with an abutment groove 704 and a pull buckle 703. The opening edge of the main housing 1 is inserted into the abutment groove 704, and the pull buckle 703 is fastened on the fastening platform 101 to make the end face of the opening edge of the main housing 1 abut against the bottom surface of the abutment groove 704.

[0019] Furthermore, a through hole 103 is formed at the bottom of the cavity 102 of the main housing 1, and at least a portion of the front cover 403 is exposed through the through hole 103.

[0020] Furthermore, the end face of the lower pad ring 3 facing the inner sleeve 402 is also formed with an annular groove 301, the support part 405 is engaged in the annular groove 301, and the lower pad ring 3 is also formed with a sleeve part 302 that is spaced apart from the annular groove 301 and extends axially. The inner wall of the sleeve part 302 is sleeved with at least one section of the outer wall of the reinforcing sleeve 401.

[0021] Furthermore, the pressure cover 7 is also provided with a connector 705 for connecting to an external power source.

[0022] The beneficial technical effects of this application are as follows: The cooling fan motor provided by this application has a double-layer housing structure, namely an outer housing and an inner housing assembly consisting of a main housing and a pressure cover. The pressure cover is used to engage with the main housing and its fastening platform to form a firmly connected whole. The upper and lower washer rings engage with the main housing and pressure cover to tightly fix the inner housing within the main housing and pressure cover. The rotor is rotatably mounted in the bearing position through bearings to achieve smooth power output. In this way, the main structure of the motor is formed without the use of a single fastener. It has the advantages of fast assembly speed and high production efficiency. At the same time, the upper and lower washer rings engaging with the main housing and pressure cover also have a significant vibration damping and buffering effect, which helps to improve the reliability of the motor. Attached Figure Description

[0023] Figure 1 This is an exploded view of the motor for the cooling fan in this application;

[0024] Figure 2 This is a top view of the motor for the cooling fan of this application;

[0025] Figure 3 This is a cross-sectional view of AA in the figure;

[0026] Figure 4 This is a perspective view of the capping in this application;

[0027] Figure 5 for Figure 3 Enlarged view of section B in the middle.

[0028] In the diagram: 1. Main housing; 101. Fastening platform; 102. Cavity; 103. Through hole; 2. Rotor; 3. Lower gasket ring; 301. Ring groove; 302. Sleeve connection; 4. Inner housing; 401. Reinforcing sleeve; 402. Inner sleeve; 403. Front cover; 404. Riveting protrusion; 405. Support part; 406. Riveting finger; 5. Inner cover; 501. Protrusion; 502. Frustum; 503. Rib; 504. Inner tongue; 505. Outer tongue; 6. Upper gasket ring; 601. Groove; 7. Pressure cap; 701. Receiving cavity; 702. Cylindrical; 703. Pull buckle; 704. Abutment groove; 705. Plug connector; 8. Bearing position; 9. Bearing. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Please see Figures 1 to 5 A motor for a cooling fan includes a main housing 1, a pressure cover 7, an inner housing assembly, an upper gasket 6, and a lower gasket sleeve 3; wherein,

[0031] The main housing 1 forms a cavity 102 with one end open; the pressure cover 7 forms a receiving cavity 701 facing the main housing 1, and the pressure cover 7 is fastened to the main housing 1; the bottom of the receiving cavity 701 is evenly distributed with protruding cylinders 702; the inner shell assembly includes an inner housing 4 and an inner cover 5 connected as one piece for mounting the rotor 2, and the inner shell assembly is fixedly housed in the space formed by the cavity 102 and the receiving cavity 701; the outer end of the inner cover 5 extends axially to form a frustum 502, and a plurality of ribs 503 are evenly distributed circumferentially on the outer wall of the frustum 502, and the longitudinal direction of the ribs 503 is parallel to the axis of the rotor 2; the upper gasket 6 is sleeved on the frustum 502 and its two ends are respectively adjacent to the receiving cavity 701 and the inner cover 5. The upper gasket 6 is an elastomer with a set hardness, and its inner wall has a groove 601 that matches the rib 503. The cylinder 702 is elastically pressed into the end face of the upper gasket 6. In this way, the circumferential, axial and radial degrees of freedom of the inner shell assembly can be effectively restricted, so as to realize the stable connection between the inner shell assembly and the main shell 1 and the pressure cover 7, and to realize the vibration isolation and vibration reduction between them. The lower gasket 3 is installed in the cavity 102, and its two ends abut against the adjacent ends of the inner shell 4 and the cavity 102 respectively. Here, the upper gasket 6 can be made of polyurethane material or rubber. The hardness value can be specifically selected according to the size of the motor power, which is not limited here.

[0032] According to the structure provided in this embodiment, the cooling fan motor provided in this application has a double-shell structure, namely an outer shell assembly consisting of a main shell 1 and a pressure cover 7. The main shell 1 is used to connect with the target fan's matching parts, and the main shell 1 itself can also serve as a side wall of the fan, featuring good protection performance and convenient installation. The abutment groove 704 and pull buckle 703 provided on the pressure cover 7 cooperate with the main shell 1 and its fastening platform 101 to form a firmly connected whole. The upper gasket ring 6 and lower gasket ring sleeve 3 cooperate with the main shell 1 and the pressure cover 7 to tightly fix the inner shell 4 inside the main shell 1 and the pressure cover 7. The rotor 2 is rotatably installed in the bearing position 8 through the bearing 9 to achieve smooth power output. In this way, the main structure of the motor is formed without the use of a single fastener. It has the advantages of fast assembly speed and high production efficiency. At the same time, the upper gasket ring 6 and lower gasket ring sleeve 3 cooperate with the main shell 1 and the pressure cover 7 to have a significant vibration damping and buffering effect, which is beneficial to improving the reliability of the motor.

[0033] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 5 The inner shell 4 includes an inner sleeve 402, a reinforcing sleeve 401, and a front cover 403; wherein,

[0034] The inner wall of the inner sleeve 402 is used to install a magnet (not shown) and mates with the rotor 2; the reinforcing sleeve 401 is fastened to the outer wall of the inner sleeve 402; the inner sleeve 402 extends axially toward the cavity 102 and the reinforcing sleeve 401 forms a riveting protrusion 404 and a support portion 405; the inner sleeve 402 extends axially toward the inner cover 5 and the reinforcing sleeve 401 forms a riveting finger 406; the outer wall of the inner cover 5 protrudes radially and forms a protrusion 501 for riveting with the riveting finger 406; the front cover 403 is riveted to the inner sleeve 402 through the riveting protrusion 404; the front cover 403 and the inner cover 5 are coaxially formed with a bearing seat 8 for accommodating the bearing 9 on the rotor 2.

[0035] According to the structure provided in this embodiment, by fitting a reinforcing sleeve 401 around the inner sleeve 402, the leakage of magnetic lines of force of the magnet is effectively reduced, the magnetic interference to the outside is reduced, and the electromagnetic compatibility is improved. On the other hand, the strength of the inner shell 4 is effectively increased, which is beneficial to improving the stability and reliability of the motor. Here, both the inner sleeve 402 and the reinforcing sleeve 401 are made of sheet metal stamping, and after fitting, the seams of the inner sleeve 402 and the seams of the reinforcing sleeve 401 are staggered in the circumferential direction to further improve the strength of the assembly. The inner sleeve 402, inner cover 5, and front cover 403 are riveted together by riveting protrusions 404 and riveting fingers 406, which has the advantages of firm connection of each component, fast assembly production speed, and high efficiency.

[0036] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 5 The inner wall of the inner cover 5 also has an axially extending inner tongue 504 that contacts and engages with the inner wall of the inner sleeve 402, and the outer wall of the inner cover 5 also has an axially extending outer tongue 505 that contacts and engages with the outer wall of the inner sleeve 402. Thus, after the inner cover 5 and the inner sleeve 402 are joined, the inner tongue 504 and the outer tongue 505 form a clamping and positioning structure for the inner sleeve 402, which effectively increases the positioning accuracy and structural strength of the two in the radial direction, making the structure stronger and more stable after riveting.

[0037] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 5The outer wall of the main housing 1 is evenly provided with snap-fit ​​platforms 101. The end of the pressure cap 7 facing the main housing 1 has an abutment groove 704 and a pull buckle 703. The opening of the main housing 1 is inserted into the abutment groove 704, and the pull buckle 703 is fastened onto the snap-fit ​​platform 101 to abut the bottom surface of the abutment groove 704. Thus, during assembly, only the pull buckle 703 needs to be aligned with the snap-fit ​​platform 101 and then axially pressed together to engage the pull buckle 703 onto the snap-fit ​​platform 101. It is understood that during axial pressing, the opening portion of the main housing 1 within the abutment groove 704 is allowed to elastically deform to allow the pull buckle 703 to engage with the snap-fit ​​platform 101. After the pressing force is released, the main housing... The elastic force generated by the elastic recovery of the opening edge of 1 tightens the buckle 703 and the fastening table 101, and also makes the opening edge of the main housing 1 abut against the bottom surface of the abutment groove 704 to obtain a firm connection; thereby, the motor for the cooling fan of this application has good reliability; after the main housing 1 and the pressure cover 7 are fastened, the upper gasket 6 is axially compressed, causing the upper gasket 6 to produce elastic deformation in the radial direction. At this time, the groove 601 and the rib 503 form a contact fit, and the solid outer wall of the upper gasket 6 also abuts against the inner wall of the receiving cavity 701; at this time, the elastic force generated by the upper gasket 6 is also transmitted to the lower gasket sleeve 3 to support the inner sleeve 402, thereby realizing the fixation of the inner housing assembly.

[0038] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 5 A through hole 103 is formed at the bottom of the cavity 102 of the main housing 1. At least a part of the front cover 403 is exposed through the through hole 103, so that the front end of the output shaft of the rotor 2 can also be exposed, which facilitates connection with the blades of the fan.

[0039] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 5 The lower pad ring 3 has an annular groove 301 formed on its end face facing the inner sleeve 402. The support part 405 is engaged in the annular groove 301. The lower pad ring 3 also has a sleeve part 302 formed on its axial extension spaced from the annular groove 301. The inner wall of the sleeve part 302 is sleeved with at least a section of the outer wall of the reinforcing sleeve 401. In this way, the inner sleeve 402 and the reinforcing sleeve 401 can have a more stable connection with the main housing 1, avoiding radial looseness and further improving the stability of the motor.

[0040] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 5 The pressure cap 7 is also provided with a connector 705 for connecting to an external power source; thus, it is convenient to make electrical connection with an external power source and the installation is convenient; it is understood that the coil wound on the rotor 2 of the motor for the cooling fan provided in this application, the brush and brush holder for supplying power to the coil can all adopt the prior art.

[0041] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] In the description of this application, it should be understood that the terms "one end", "axial", "radial", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor for a cooling fan, characterized by comprising: include: The main shell (1) forms a cavity (102) with one end open. The pressure cap (7) has a receiving cavity (701) that opens toward the main housing (1), and the pressure cap (7) is fastened to the main housing (1); the bottom of the receiving cavity (701) is evenly distributed with protruding cylinders (702). The inner shell assembly includes an inner shell (4) and an inner cover (5) connected as a whole for mounting the rotor (2). The inner shell assembly is fixedly housed in the space formed by the cavity (102) and the receiving cavity (701). The outer end of the inner cover (5) extends axially to form a frustum (502). A plurality of ribs (503) are evenly distributed around the outer wall of the frustum (502). The longitudinal direction of the ribs (503) is parallel to the axis of the rotor (2). The upper gasket (6) is sleeved on the frustum (502) and its two ends abut against the adjacent end faces of the receiving cavity (701) and the inner cover (5), respectively; the upper gasket (6) is an elastic body with a set hardness, and the inner wall is formed with a groove (601) adapted to the rib (503); the cylinder (702) is elastically pressed into the end face of the upper gasket (6); The lower pad ring (3) is installed inside the cavity (102), with its two ends abutting against the adjacent ends of the inner shell (4) and the cavity (102), respectively.

2. The motor for a cooling fan according to claim 1, characterized by The inner shell (4) includes: The inner sleeve (402) has an inner wall for mounting magnets and cooperating with the rotor (2); A reinforcing sleeve (401) is fastened to the outer wall of the inner sleeve (402); The inner sleeve (402) extends axially out of the reinforcing sleeve (401) at one end facing the cavity (102) and forms a riveting protrusion (404) and a support portion (405). The inner sleeve (402) extends axially out of the reinforcing sleeve (401) at one end facing the inner cover (5) and forms a riveting finger (406). The outer wall of the inner cover (5) has a radially protruding protrusion (501) for riveting with the riveting finger (406); The front cover (403) is riveted to the inner sleeve (402) by the riveting protrusion (404); The front cover (403) and the inner cover (5) are coaxially formed with bearing positions (8) for accommodating the bearings (9) on the rotor (2).

3. The motor for a cooling fan according to claim 2, characterized by: The inner wall of the inner cover (5) is also formed with an axially extending inner tongue (504) that contacts and engages with the inner wall of the inner sleeve (402), and the outer wall of the inner cover (5) is also formed with an axially extending outer tongue (505) that contacts and engages with the outer wall of the inner sleeve (402).

4. The motor for a cooling fan according to claim 1, characterized by: The outer wall of the main housing (1) is provided with fastening platforms (101) evenly distributed. The end of the pressure cap (7) facing the main housing (1) is formed with an abutment groove (704) and a pull buckle (703). The opening edge of the main housing (1) is inserted into the abutment groove (704), and the pull buckle (703) is fastened on the fastening platform (101) to make the end face of the opening edge of the main housing (1) abut against the bottom surface of the abutment groove (704).

5. The motor for a cooling fan according to claim 2, characterized in that: A through hole (103) is formed at the bottom of the cavity (102) of the main housing (1), and at least a portion of the front cover (403) is exposed through the through hole (103).

6. The motor for a cooling fan according to claim 2, characterized by: The end face of the lower pad ring (3) facing the inner sleeve (402) is also formed with an annular groove (301), the support part (405) is engaged in the annular groove (301), and a sleeve part (302) is also formed on the lower pad ring (3) spaced apart from the annular groove (301) and extending axially. The inner wall of the sleeve part (302) is sleeved with at least one section of the outer wall of the reinforcing sleeve (401).

7. The motor for cooling fans according to any one of claims 1 to 6, characterized by: The cover (7) is also provided with a connector (705) for connecting to an external power source.

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