Oil storage type fan

Abstract

The utility model belongs to the technical field of fans, and relates to an oil storage type fan which comprises an outer frame and fan blades, a middle pipe is arranged in the middle of the outer frame, a stator is fixed outside the middle pipe, a rotating shaft is arranged in the middle pipe, the upper end of the rotating shaft extends out of the middle pipe and is fixedly connected with the fan blades, and a magnetic frame combination matched with the stator is arranged in the fan blades. The rotating shaft is connected with the middle pipe through the oil bearing, the upper end and the lower end of the outer circle of the oil bearing are in interference fit with the middle pipe, and a sealed oil storage cavity is formed between the middle of the outer circle of the oil bearing and an inner hole of the middle pipe. According to the oil storage type fan, a large amount of lubricating oil can be stored and can be slowly released for a long time, so that the fan can normally work for a long time, and the operation service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans and relates to an oil storage fan. Background Art

[0002] Chinese utility model patent CN 210461130 U (publication date: 2022-06-28) discloses an electric fan, including a mounting seat and a middle tube arranged in the middle of the mounting seat, the mounting seat is provided with a through hole connected to the middle tube, the upper end of the rotating shaft arranged in the middle tube extends from the upper end of the middle tube and is fixed to the fan blade, an electromagnet is fixed outside the middle tube, and an annular permanent magnet cooperating with the electromagnet is fixed at the inner end of the fan blade, the rotating shaft is connected to the middle tube through a bearing, an oil cover for sealing the through hole is provided at the through hole, a limiting plate is fixed at the upper end of the middle tube to prevent the bearing from slipping out of the upper end of the middle tube, the lower end of the rotating shaft is reduced in diameter to form a limiting portion, and the lower end of the bearing is provided with a cross buckle ring cooperating with the limiting portion to prevent the rotating shaft from falling out.

[0003] The disadvantage of the above electric fan is that the fan has a small amount of oil storage. During the operation of the fan, the lubricating oil evaporates very quickly, which will cause the fan to produce noise and stall, so the operating life of the fan cannot be guaranteed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an oil storage fan which can store a large amount of lubricating oil and release it slowly over a long period of time, so that the fan can work normally for a long time and its service life is prolonged.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] An oil storage fan comprises an outer frame and fan blades, wherein a middle tube is arranged in the middle of the outer frame, a stator is fixed outside the middle tube, a rotating shaft is arranged in the middle tube, the upper end of the rotating shaft extends from the middle tube and is fixedly connected to the fan blades, a magnetic frame assembly cooperating with the stator is arranged in the fan blades, the rotating shaft is connected to the middle tube through an oil-containing bearing, the upper and lower ends of the outer circle of the oil-containing bearing are respectively interference fit with the middle tube, and a sealed oil storage cavity is formed between the middle part of the outer circle of the oil-containing bearing and the inner hole of the middle tube.

[0007] In the above-mentioned oil storage fan, the lower end of the outer circle of the oil-containing bearing extends outward to form a lower step structure, and the lower step structure is interference fit with the inner hole of the middle tube. The upper end of the inner hole of the middle tube extends inward to form an upper step structure, and the upper step structure is interference fit with the outer circle of the oil-containing bearing.

[0008] In the above-mentioned oil storage fan, a lower limiting step is arranged on the inner hole of the middle tube, and the lower limiting step abuts against the upper end of the lower step structure and axially limits the oil-containing bearing.

[0009] In the above-mentioned oil storage fan, an upper limit step is provided at the inner bottom of the upper step structure, and the upper limit step abuts against the upper end of the oil-containing bearing to form an axial limit structure.

[0010] In the above-mentioned oil storage fan, an oil filling slot hole connected to the oil storage cavity is arranged on the lower step structure, a seal for sealing the oil filling slot hole is arranged below the lower step structure, and an oil cover is arranged on the outer frame below the seal.

[0011] In the above-mentioned oil storage fan, the oil injection slot hole penetrates the lower step structure along the axial direction.

[0012] In the above-mentioned oil storage fan, the sealing member is a composite member, including a sealing plate and a cross buckle ring, the upper end surface of the sealing plate is sealingly connected to the oil-containing bearing, and the cross buckle ring axially fixes the sealing plate and the rotating shaft.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model provides an oil storage fan. By setting an oil storage cavity between the outer circle of the oil-containing bearing and the inner hole of the middle tube, a large amount of lubricating oil can be sealed in the cavity. Since the oil-containing bearing is made of powder metallurgy and has many fine holes, when the fan is running, the coil, shaft, and bearing will generate heat, which will cause the lubricating oil to penetrate from the oil storage cavity through the bearing to lubricate the bearing and the shaft. By slowly releasing the lubricating oil over a long period of time, the fan can work normally for a long time and its operating life is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is an axial cross-sectional view of the utility model;

[0017] Figure 3 yes Figure 2 A partial enlarged view of

[0018] Figure numerals: 1. outer frame; 2. fan blades; 3. middle tube; 4. stator; 5. rotating shaft; 6. magnetic frame assembly; 7. oil-containing bearing; 8. oil storage cavity; 9. lower step structure; 10. upper step structure; 11. lower limit step; 12. upper limit step; 13. oil filling slot; 14. oil cover; 15. sealing plate; 16. cross buckle. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings. Figure 1-3 :

[0020] An oil storage fan comprises an outer frame 1 and blades 2, wherein a middle tube 3 is provided in the middle of the outer frame 1, a stator 4 is fixed outside the middle tube 3, a rotating shaft 5 is provided in the middle tube 3, the upper end of the rotating shaft 5 extends from the middle tube 3 and is fixedly connected to the blades 2, a magnetic frame assembly 6 cooperating with the stator 4 is provided in the blades 2, the rotating shaft 5 is connected to the middle tube 3 through an oil-containing bearing 7, the upper and lower ends of the outer circle of the oil-containing bearing 7 are respectively interference fit with the middle tube 3, and a sealed oil storage cavity 8 is formed between the middle part of the outer circle of the oil-containing bearing 7 and the inner hole of the middle tube 3.

[0021] The lubrication principle of this embodiment is: lubricating oil is poured into the oil storage cavity 8. When the fan is working, the fan's stator 4, oil-containing bearing 7, rotating shaft 5 and other components will generate heat, which will increase the temperature of the lubricating oil in the oil storage cavity 8, reduce the viscosity of the lubricating oil, and enhance its fluidity. Then, the lubricating oil can slowly penetrate through the fine holes in the oil-containing bearing 7 and be transported to the inside of the oil-containing bearing and the rotating shaft 5, thereby playing a lubricating role.

[0022] Compare with Figure 2 and attached Figure 3 In this embodiment, the specific setting method of the oil storage cavity 8 is: the lower end of the outer circle of the oil-containing bearing 7 extends outward to form a lower step structure 9, and the lower step structure 9 is interference fit with the inner hole of the middle tube 3, and the upper end of the inner hole of the middle tube 3 extends inward to form an upper step structure 10, and the upper step structure 10 is interference fit with the outer circle of the oil-containing bearing 7.

[0023] Furthermore, a lower limiting step 11 is provided on the inner hole of the middle tube 3 , and the lower limiting step 11 abuts against the upper end of the lower step structure 9 and axially limits the oil-containing bearing 7 .

[0024] Furthermore, an upper limit step 12 is provided at the inner bottom of the upper step structure 10 , and the upper limit step 12 abuts against the upper end of the oil-containing bearing 7 to form an axial limit structure.

[0025] During installation, the rotating shaft 5 is inserted into the oil-containing bearing 7 so that the rotating shaft 5 and the inner circle of the oil-containing bearing 7 are in clearance fit; then the oil-containing bearing 7 equipped with the rotating shaft 5 is inserted into the inner hole of the middle tube 3 from bottom to top until the lower step structure 9 contacts the lower limit step 11 and the upper end of the oil-containing bearing 7 contacts the upper limit step 12. At this time, the upper step structure 10 and the outer circle of the oil-containing bearing 7 are interference fit to form an upper sealing surface, and the lower step structure 9 and the inner hole of the middle tube 3 are interference fit to form a lower sealing surface. The lower end surface of the upper step structure 10, the upper end surface of the lower step structure 9, the outer circle of the oil-containing bearing 7, and the inner hole of the middle tube 3 surround the oil storage cavity 8.

[0026] In this embodiment, the oil filling structure of the oil storage cavity 8 is: an oil filling slot hole 13 connected to the oil storage cavity 8 is provided on the lower step structure 9, a seal for sealing the oil filling slot hole 13 is provided below the lower step structure 9, and an oil cover 14 is provided on the outer frame 1 below the seal.

[0027] When oil filling is required, lubricating oil can be injected into the oil storage cavity 8 through the oil filling slot 13 . After the filling is completed, the sealing member and the oil cover 14 are installed to seal the oil filling slot 13 .

[0028] Preferably, the oil injection slot 13 penetrates the lower step structure 9 along the axial direction.

[0029] The sealing member is a composite member, including a sealing sheet 15 and a cross buckle ring 16 . The upper end surface of the sealing sheet 15 is sealedly connected to the oil-containing bearing 7 , and the cross buckle ring 16 axially fixes the sealing sheet 15 and the rotating shaft 5 .

[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil storage fan, comprising an outer frame (1) and fan blades (2), wherein a middle tube (3) is arranged in the middle of the outer frame (1), a stator (4) is fixed outside the middle tube (3), a rotating shaft (5) is arranged inside the middle tube (3), the upper end of the rotating shaft (5) extends from the middle tube (3) and is fixedly connected to the fan blades (2), and a magnetic frame assembly (6) cooperating with the stator (4) is arranged inside the fan blades (2), characterized in that: The rotating shaft (5) is connected to the middle tube (3) via an oil-containing bearing (7); the upper and lower ends of the outer circle of the oil-containing bearing (7) are respectively interference-fitted with the middle tube (3); and a sealed oil storage cavity (8) is formed between the middle part of the outer circle of the oil-containing bearing (7) and the inner hole of the middle tube (3).

2. The oil storage fan according to claim 1, characterized in that: The lower end of the outer circle of the oil-containing bearing (7) extends outward to form a lower step structure (9), and the lower step structure (9) is interference fit with the inner hole of the middle tube (3). The upper end of the inner hole of the middle tube (3) extends inward to form an upper step structure (10), and the upper step structure (10) is interference fit with the outer circle of the oil-containing bearing (7).

3. The oil storage fan according to claim 2, characterized in that: A lower limiting step (11) is provided on the inner hole of the middle tube (3), and the lower limiting step (11) abuts against the upper end of the lower step structure (9) and axially limits the oil-containing bearing (7).

4. The oil storage fan according to claim 2, characterized in that: An upper limit step (12) is provided at the inner bottom of the upper step structure, and the upper limit step (12) abuts against the upper end of the oil-containing bearing (7) to form an axial limit structure.

5. The oil storage fan according to claim 2, characterized in that: The lower step structure (9) is provided with an oil filling slot hole (13) connected to the oil storage cavity (8), a sealing member for sealing the oil filling slot hole (13) is provided below the lower step structure (9), and an oil cover (14) is provided on the outer frame (1) below the sealing member.

6. The oil storage fan according to claim 5, characterized in that: The oil injection slot hole (13) penetrates the lower step structure (9) along the axial direction.

7. The oil storage fan according to claim 5, characterized in that: The sealing member is a composite member, comprising a sealing sheet (15) and a cross buckle ring (16); the upper end surface of the sealing sheet (15) is sealingly connected to the oil-containing bearing (7); and the cross buckle ring (16) axially fixes the sealing sheet (15) and the rotating shaft (5).

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