Oil-free air compressor

Abstract

The utility model relates to the technical field of air compressors, and discloses an oil-free air compressor which is characterized by comprising a motor, a cylinder body and a sealing cover, a circulation cavity and a working cavity are formed in the cylinder body, the sealing cover divides the circulation cavity and the working cavity, the sealing cover and the cylinder body are detachably connected and sealed, and the sealing cover and the cylinder body are detachably connected. When the transmission compression mechanism is installed, the sealing cover is not installed firstly, so that the circulation cavity is communicated with the working cavity, the transmission compression mechanism can be installed firstly, then the sealing cover is installed, an eccentric wheel assembly in the transmission compression mechanism can be installed more conveniently, and an installation tool can enter the working cavity through the circulation cavity; the detachable connection between the first shaft body and the second shaft body facilitates the disassembly and assembly of the sealing cover, and when the sealing cover is disassembled, the sealing cover and the second shaft body can be disassembled together, so that the sealing bearing does not need to be separated from the second shaft body.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, and more specifically to an oil-free air compressor. Background Art

[0002] The oil-free air compressor realizes the function of compressing air by rotating the motor to make the piston reciprocate, and can be used in oxygen concentrators. In order to solve the heat dissipation problem of the oil-free air compressor, a new internal intake silent air oil-free compressor is disclosed in the invention with patent application number 202311194007.7, which discloses a first stop cover, and the space in the first cylinder body is divided into two spaces by the first stop cover;

[0003] However, in the above utility model, the first stop cover and the first cylinder body are integrally formed, which makes it difficult to install the transmission compression mechanism. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide an oil-free air compressor for facilitating the installation of a transmission compression mechanism.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil-free air compressor, comprising a motor, a cylinder body and a cover, wherein a circulation chamber and a working chamber are formed in the cylinder body, the cover separates the circulation chamber and the working chamber, the cover is detachably connected to the cylinder body and sealed, the output shaft of the motor passes through the cover, and a sealed bearing is connected to the cover.

[0006] As a further improvement of the utility model, a plurality of connecting holes are provided on the cover, and a plurality of first threaded holes corresponding to the connecting holes are provided on the cylinder body.

[0007] As a further improvement of the present invention, a sealing ring is provided between the sealing cover and the cylinder body.

[0008] As a further improvement of the present utility model, the output shaft of the motor includes a first shaft body and a second shaft body, the first shaft body and the second shaft body are detachably connected, and the second shaft body is connected to the sealed bearing.

[0009] As a further improvement of the present invention, a second threaded hole is formed at one end of the first shaft body facing the second shaft body, an external thread is formed at one end of the second shaft body facing the first shaft body, and the second shaft body is threadedly connected to the second threaded hole through the external thread.

[0010] As a further improvement of the present invention, the first shaft body and the second shaft body are connected by a spline plug-in connection.

[0011] As a further improvement of the present invention, a positioning hole is formed at one end of the first shaft body toward the second shaft body, at least one first plane is formed on the positioning hole, and a second plane matching the first plane is formed at one end of the second shaft body toward the first shaft body.

[0012] As a further improvement of the present invention, a fan blade is fixedly connected to the second shaft, and an air outlet is provided on the cylinder body.

[0013] As a further improvement of the present invention, an end cover is detachably connected to one end of the cylinder body away from the motor, and an air inlet is provided on the end cover.

[0014] As a further improvement of the present invention, a ring body is formed on the inner side of the sealing cover, a receiving groove is formed in the ring body, and the sealing bearing is located in the receiving groove.

[0015] The beneficial effects of the utility model are as follows: the utility model forms a detachable connection between the sealing cover and the cylinder body, and when installing the transmission compression mechanism, the sealing cover is not installed first, so that the circulation chamber and the working chamber are connected. The transmission compression mechanism can be installed first, and then the sealing cover is installed, so that the eccentric wheel assembly in the transmission compression mechanism can be installed more conveniently, and the installation tool can enter the working chamber through the circulation chamber. The detachable connection between the first shaft body and the second shaft body facilitates the disassembly and assembly of the sealing cover. When removing the sealing cover, the sealing cover and the second shaft body can be removed together, thereby eliminating the need to separate the sealing bearing from the second shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the cylinder body in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the sealing cover in the utility model;

[0020] Figure 5 It is a front view of a positioning hole provided on the first shaft body of the utility model.

[0021] Figure numerals: 1. Motor; 11. First shaft; 12. Second shaft; 2. Cylinder body; 21. Circulation chamber; 22. Working chamber; 23. First threaded hole; 24. Air outlet; 3. Cover; 31. Connecting hole; 32. Ring body; 33. Receiving groove; 4. Fan blade; 5. End cover; 51. Air inlet. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0023] Reference Figures 1 to 4 As shown, an oil-free air compressor of this embodiment includes a motor 1, a cylinder body 2 and a cover 3, a circulation chamber 21 and a working chamber 22 are formed in the cylinder body 2, and the cover 3 separates the circulation chamber 21 and the working chamber 22, wherein a transmission compression mechanism is installed at the working chamber 22, a fan blade 4 is installed in the circulation chamber 21, and the fan blade 4 and the transmission compression mechanism are driven to move by the output shaft of the motor 1;

[0024] The cover 3 is detachably connected and sealed to the cylinder body 2, and can be sealed by a rubber gasket to improve the sealing between the cover 3 and the cylinder body 2, prevent the gas in the working chamber 22 from flowing to the circulation chamber 21, and separate the working chamber 22 from the circulation chamber 21; the output shaft of the motor 1 passes through the cover 3, and a sealed bearing is connected between the cover 3, forming a detachable connection between the cover 3 and the cylinder body 2, and when installing the transmission compression mechanism, the cover 3 may not be installed first, so that the circulation chamber 21 is connected to the working chamber 22, and the transmission compression mechanism may be installed first, and then the cover 3 may be installed, so that the eccentric wheel assembly in the transmission compression mechanism can be installed more conveniently, and the installation tool can enter the working chamber 22 through the circulation chamber 21.

[0025] Reference Figure 3 and Figure 4 As shown, the cover 3 is provided with a plurality of connection holes 31, and the cylinder body 2 is provided with a plurality of first threaded holes 23 corresponding to the connection holes 31, and the number of the connection holes 31 and the first threaded holes 23 is not limited, wherein a connection column is formed on the cylinder body 2, and the first threaded holes 23 are provided on the connection column, and a detachable connection between the cover 3 and the cylinder body 2 is realized by bolts;

[0026] The bolt passes through the connection hole 31 and is threadedly connected with the first threaded hole 23 .

[0027] A sealing ring is provided between the sealing cover 3 and the cylinder body 2 , wherein a sealing groove may be provided on the inner side of the sealing cover 3 , and the sealing ring may be embedded in the sealing groove, thereby achieving sealing between the sealing cover 3 and the cylinder body 2 .

[0028] Reference Figure 2As shown, the output shaft of the motor 1 includes a first shaft body 11 and a second shaft body 12, the first shaft body 11 and the second shaft body 12 are detachably connected, and the second shaft body 12 is connected to a sealed bearing. The detachable connection between the first shaft body 11 and the second shaft body 12 facilitates the disassembly and assembly of the cover 3. When the cover 3 is removed, the cover 3 and the second shaft body 12 can be removed together, thereby eliminating the need to separate the sealed bearing from the second shaft body 12.

[0029] If the first shaft body 11 and the second shaft body 12 are integrally formed, the output shaft of the motor 1 needs to be separated from the sealed bearing before the cover 3 can be removed.

[0030] In one embodiment, a second threaded hole is formed at one end of the first shaft body 11 facing the second shaft body 12, and an external thread is formed at one end of the second shaft body 12 facing the first shaft body 11. The second shaft body 12 is threadedly connected to the second threaded hole through the external thread, and the first shaft body 11 and the second shaft body 12 are detachable by threaded connection;

[0031] The positions of the external thread and the second threaded hole can be interchanged to achieve the threaded connection between the first shaft body 11 and the second shaft body 12;

[0032] When the oil-free air compressor is working, the motor 1 rotates in only one direction, such as forward rotation, so the second shaft 12 can be threadedly connected to the first shaft 11 in a reverse rotation, so that the threads between the first shaft 11 and the second shaft 12 will not loosen.

[0033] Reference Figure 2 As shown, in another embodiment, the first shaft body 11 and the second shaft body 12 are connected by a spline plug-in connection. The spline connection method is more convenient and can better align the first shaft body 11 and the second shaft body 12.

[0034] Reference Figure 5 As shown, in the third embodiment, a positioning hole is formed at one end of the first shaft body 11 facing the second shaft body 12, and at least one first plane is formed on the positioning hole. A second plane matching the first plane is formed at one end of the second shaft body 12 facing the first shaft body 11. The end of the second shaft body 12 facing the first shaft body 11 is inserted into the positioning hole, so that the first plane corresponds to the second plane, so that the second shaft body 12 can be driven to rotate when the first shaft body 11 rotates;

[0035] The first plane may be one, two, three, four, or even more;

[0036] When there are multiple first planes, the cross section of the positioning hole is a polygon.

[0037] Reference Figure 2As shown, the fan blades 4 are fixedly connected to the second shaft 12, and an air outlet 24 is opened on the cylinder body 2. When the second shaft 12 rotates, the fan blades 4 will rotate at the same time, so that the airflow generated by the rotation of the fan blades 4 flows out from the air outlet 24, thereby reducing the temperature of the cover 3 and the side of the cylinder body 2, achieving a cooling effect.

[0038] Reference Figure 1 As shown, the end of the cylinder body 2 facing away from the motor 1 is detachably connected to an end cover 5, and an air inlet 51 is provided on the end cover 5. The end cover 5 and the cylinder body 2 can also be detachably connected by bolts;

[0039] The end cover 5 plays a protective role to prevent workers from accidentally touching the fan blade 4;

[0040] Reference Figure 4 As shown, a ring body 32 is formed on the inner side of the cover 3, and a receiving groove 33 is formed in the ring body 32. The sealed bearing is located in the receiving groove 33. The receiving groove 33 provides an installation space for the sealed bearing, which is convenient for the installation of the sealed bearing.

[0041] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. An oil-free air compressor, characterized in that: The invention comprises a motor (1), a cylinder body (2) and a cover (3); a circulation chamber (21) and a working chamber (22) are formed in the cylinder body (2); the cover (3) separates the circulation chamber (21) and the working chamber (22); the cover (3) and the cylinder body (2) are detachably connected and sealed; the output shaft of the motor (1) passes through the cover (3) and is connected to the cover (3) by a sealed bearing.

2. An oil-free air compressor according to claim 1, characterized in that: The sealing cover (3) is provided with a plurality of connection holes (31), and the cylinder body (2) is provided with a plurality of first threaded holes (23) corresponding to the connection holes (31).

3. An oil-free air compressor according to claim 1, characterized in that: A sealing ring is provided between the sealing cover (3) and the cylinder body (2).

4. The oil-free air compressor according to claim 1, characterized in that: The output shaft of the motor (1) comprises a first shaft (11) and a second shaft (12); the first shaft (11) and the second shaft (12) are detachably connected; and the second shaft (12) is connected to the sealed bearing.

5. An oil-free air compressor according to claim 4, characterized in that: A second threaded hole is formed at one end of the first shaft body (11) facing the second shaft body (12), an external thread is formed at one end of the second shaft body (12) facing the first shaft body (11), and the second shaft body (12) is threadedly connected to the second threaded hole via the external thread.

6. An oil-free air compressor according to claim 4, characterized in that: The first shaft body (11) and the second shaft body (12) are connected via a spline plug-in connection.

7. An oil-free air compressor according to claim 4, characterized in that: A positioning hole is formed at one end of the first shaft body (11) facing the second shaft body (12), at least one first plane is formed on the positioning hole, and a second plane matching the first plane is formed at one end of the second shaft body (12) facing the first shaft body (11).

8. An oil-free air compressor according to claim 4, characterized in that: The second shaft (12) is fixedly connected with a fan blade (4), and the cylinder body (2) is provided with an air outlet (24).

9. An oil-free air compressor according to claim 8, characterized in that: An end of the cylinder body (2) facing away from the motor (1) is detachably connected to an end cover (5), and an air inlet (51) is provided on the end cover (5).

10. The oil-free air compressor according to claim 1, characterized in that: A ring body (32) is formed on the inner side of the sealing cover (3), a receiving groove (33) is formed in the ring body (32), and the sealing bearing is located in the receiving groove (33).

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