Fan blade connecting structure of oil-free air compressor and air compressor thereof

Abstract

The utility model discloses a kind of fan blade connecting structure of oilless air compressor and its air compressor, and its technical solution main point is including motor, fan blade and bolt, integrally formed with shaft on the fan blade, the output shaft of motor is provided with threaded hole, the through hole is provided on the shaft, bolt is connected with threaded hole by through hole and is screwed, by the connecting mode of bolt and threaded hole, to realize the detachable connection between fan blade and motor output shaft, and bolt passes through through hole, so that bolt passes through entire shaft, so that bolt is not easy to break, so that the overall structural connection strength is greater, more not easy to break.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and more specifically to a fan blade connection structure for an oil-free air compressor and the air compressor thereof. Background Technology

[0002] An air compressor is a device used to compress gas. An oil-free air compressor is a mechanical device that does not use lubricating oil in the cylinder of the compressor. It mainly converts the mechanical energy of the motor into the pressure energy of the gas.

[0003] In the utility model patent with patent application number CN202421654106.9, an oil-free air compressor is disclosed, which includes a fan blade, a first shaft and a second shaft, the fan blade is connected to the second shaft, and the first shaft and the second shaft are threadedly connected.

[0004] The connection method between the first and second shafts described above is prone to breakage at the threaded section due to its short length during prolonged operation. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fan blade connection structure and air compressor of an oil-free air compressor to prevent breakage at the threaded section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fan blade connection structure for an oil-free air compressor, comprising a motor, a fan blade, and a bolt, wherein a shaft is integrally formed on the fan blade, a threaded hole is provided on the output shaft of the motor, a through hole is provided on the shaft, and the bolt passes through the through hole and is threadedly connected to the threaded hole.

[0007] As a further improvement of this utility model, a connecting piece is sleeved on one end of the shaft facing the motor output shaft, and the connecting piece abuts against the motor output shaft and the shaft.

[0008] As a further improvement of this utility model, it includes a cylinder body, on which a connecting assembly is provided, an inner cavity is formed within the connecting assembly, and a bearing is connected between the connecting assembly and the shaft body.

[0009] As a further improvement of this utility model, a first sealing ring is provided between the bearing and the connecting member.

[0010] As a further improvement of this utility model, an annular step is formed on the shaft, and a second sealing ring is provided between the annular step and the bearing.

[0011] As a further improvement of this utility model, a flow channel is formed between the cylinder body and the connecting assembly, and an air outlet is provided on the cylinder body, with the flow channel communicating with the air outlet.

[0012] As a further improvement of this utility model, the connecting assembly includes a connecting body and a cover, the connecting body and the cylinder body are integrally formed, and the cover is detachably connected to the connecting body.

[0013] As a further improvement of this utility model, a third sealing ring is provided between the cover and the connecting body.

[0014] As a further improvement of this utility model, the motor is a dual-output motor, and the fan blades are provided in two parts, located at both ends of the motor respectively.

[0015] An air compressor includes the fan blade connection structure of the above-mentioned oil-free air compressor.

[0016] The beneficial effects of this utility model are as follows: This utility model achieves a detachable connection between the fan blade and the motor output shaft by using a bolt and threaded hole connection method. Furthermore, the bolt passes through the through hole, allowing it to pass through the entire shaft, thus making the bolt less prone to breakage. As a result, the overall structural connection strength is greater and less likely to break. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point A;

[0020] Figure 4 This is a schematic diagram of the connection structure between the fan blade and the shaft in this utility model;

[0021] Figure 5 This is a structural schematic diagram of the connector in this utility model;

[0022] Figure 6 This is a schematic diagram of the flow channel in this utility model.

[0023] Reference numerals: 1. Motor; 11. Threaded hole; 2. Fan blade; 3. Bolt; 4. Shaft; 41. Through hole; 42. Annular step; 5. Connector; 6. Cylinder; 61. Flow channel; 62. Air outlet; 7. Connecting assembly; 71. Inner cavity; 72. Connector; 73. Cover; 74. Third sealing ring; 81. Bearing; 82. First sealing ring; 83. Second sealing ring. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] Reference Figures 1 to 6 As shown, the fan blade connection structure of an oil-free air compressor in this embodiment includes a motor 1, a fan blade 2, and a bolt 3. In the oil-free air compressor, the motor 1 rotates to drive the fan blade 2 to rotate, and the rotation of the fan blade 2 generates airflow to cool some parts of the oil-free air compressor.

[0026] The fan blade 2 has an integrally formed shaft 4. The output shaft of the motor 1 has a threaded hole 11 and the shaft 4 has a through hole 41. The end of the through hole 41 facing away from the output shaft of the motor 1 is provided with a countersunk head, which can hide the end of the bolt 3. A spring piece can be provided between the end of the bolt 3 and the shaft 4 to increase the connection strength.

[0027] Bolt 3 passes through through hole 41 and is threaded into threaded hole 11. The connection between bolt 3 and threaded hole 11 enables a detachable connection between fan blade 2 and motor 1 output shaft. The above installation method allows bolt 3 to pass through the entire shaft 4, making bolt 3 less likely to break. This results in a stronger overall structural connection and makes it less prone to breakage.

[0028] Reference Figure 2 , Figure 3 ,and Figure 5 As shown, a connector 5 is fitted onto one end of the shaft 4 facing the output shaft of the motor 1. The connector 5 abuts against the output shaft of the motor 1 and the shaft 4. A groove is provided on the connector 5. The end of the shaft 4 is embedded in the groove and abuts against the bottom wall of the groove. The groove is annular.

[0029] The connector 5 is clamped between the output shaft of the motor 1 and the shaft body 4, which facilitates the setting of the first sealing ring 82.

[0030] Reference Figure 2 As shown, it includes a cylinder body 6, a connecting assembly 7 is provided on the cylinder body 6, an inner cavity 71 is formed in the connecting assembly 7, and an outer cavity is formed between the outer side of the connecting assembly 7 and the inner side of the cylinder body 6, wherein the fan blade 2 is located in the outer cavity, and the outer cavity and the inner cavity 71 are separated.

[0031] A bearing 81 is connected between the connecting component 7 and the shaft 4. The shaft 4 extends into the inner cavity 71. The bearing 81 increases the rotational stability of the shaft 4 and fixes the shaft 4.

[0032] Reference Figure 2 and Figure 3 As shown, a first sealing ring 82 is provided between the bearing 81 and the connecting piece 5. The provision of the first sealing ring 82 increases the sealing between the bearing 81 and the shaft 4, preventing the outer cavity from communicating with the inner cavity 71.

[0033] Reference Figure 3 and Figure 4 As shown, an annular step 42 is formed on the shaft 4. A second sealing ring 83 is provided between the annular step 42 and the bearing 81. The second sealing ring 83 cooperates with the first sealing ring 82. The second sealing ring 83 and the first sealing ring 82 are located on opposite sides of the bearing 81, which increases the sealing between the outer cavity and the inner cavity 71.

[0034] A flow channel 61 is formed between the cylinder body 6 and the connecting assembly 7. An air outlet 62 is provided on the cylinder body 6. The flow channel 61 and the air outlet 62 are connected. When the fan blade 2 rotates, the airflow generated by the fan blade 2 flows through the flow channel 61 to the air outlet 62. The air outlet 62 faces the motor 1, which can achieve cooling of the cylinder body 6 and the motor 1.

[0035] Reference Figure 2 As shown, the connecting assembly 7 includes a connecting body 72 and a cover 73. The connecting body 72 and the cylinder body 6 are integrally formed. The cover 73 is detachably connected to the connecting body 72. The cover 73 and the connecting body 72 are connected by screws. The detachable connection facilitates the installation of connecting rods, eccentric wheel assemblies, etc.; it also facilitates the connection of the shaft 4 to the cover 73.

[0036] A third sealing ring 74 is provided between the cover 73 and the connector 72. A groove is provided on the side of the cover 73 facing the connector 72. The third sealing ring 74 is installed in the groove. The connector 72 abuts against the third sealing ring 74. The provision of the third sealing ring 74 increases the sealing between the cover 73 and the connector 72.

[0037] Motor 1 is a dual-output motor, and there are two fan blades 2, located at opposite ends of motor 1. This fan blade 2 connection structure is used in a twin-cylinder air compressor.

[0038] An air compressor includes the fan blade connection structure of the above-mentioned oil-free air compressor.

[0039] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A fan blade connection structure for an oil-free air compressor, characterized in that: Includes a motor (1), a fan blade (2) and a bolt (3). The fan blade (2) has an integrally formed shaft (4). The output shaft of the motor (1) has a threaded hole (11). The shaft (4) has a through hole (41). The bolt (3) passes through the through hole (41) and is threadedly connected to the threaded hole (11).

2. The fan blade connection structure of an oil-free air compressor according to claim 1, characterized in that: A connector (5) is fitted onto one end of the shaft (4) facing the output shaft of the motor (1), and the connector (5) abuts against the output shaft of the motor (1) and the shaft (4).

3. The fan blade connection structure of an oil-free air compressor according to claim 2, characterized in that: Includes a cylinder body (6), on which a connecting assembly (7) is provided, an inner cavity (71) is formed inside the connecting assembly (7), and a bearing (81) is connected between the connecting assembly (7) and the shaft body (4).

4. The fan blade connection structure of an oil-free air compressor according to claim 3, characterized in that: A first sealing ring (82) is provided between the bearing (81) and the connector (5).

5. The fan blade connection structure of an oil-free air compressor according to claim 4, characterized in that: An annular step (42) is formed on the shaft (4), and a second sealing ring (83) is provided between the annular step (42) and the bearing (81).

6. The fan blade connection structure of an oil-free air compressor according to claim 3, characterized in that: A flow channel (61) is formed between the cylinder body (6) and the connecting assembly (7), and an air outlet (62) is provided on the cylinder body (6). The flow channel (61) is connected to the air outlet (62).

7. The fan blade connection structure of an oil-free air compressor according to claim 3, characterized in that: The connecting assembly (7) includes a connector (72) and a cover (73). The connector (72) and the cylinder (6) are integrally formed. The cover (73) is detachably connected to the connector (72).

8. The fan blade connection structure of an oil-free air compressor according to claim 7, characterized in that: A third sealing ring (74) is provided between the cover (73) and the connector (72).

9. The fan blade connection structure of an oil-free air compressor according to claim 1, characterized in that: The motor (1) is a dual-output motor, and there are two fan blades (2), which are located at both ends of the motor (1).

10. An air compressor, characterized in that: The fan blade connection structure of an oil-free air compressor as described in any one of claims 1 to 9 is included.

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