Air compressor

Abstract

The invention provides an air compressor. The air compressor comprises a cylinder, a frame body, a gear set, a motor, a piston, a first cooling fan and at least one second cooling fan, the frame body is connected to the cylinder. The gear set comprises a first gear, a second gear and at least one third gear. The second gear is pivoted to the frame body and meshed between the first gear and the third gear, and the third gear is pivoted to the frame body. The motor is connected to the first gear. The first end of the piston is arranged on the cylinder, and the second end of the piston is connected to the second gear. The first cooling fan is connected to the motor. The second cooling fan is connected to the third gear. The motor is suitable for driving the first cooling fan to rotate, driving the first end of the piston to reciprocate along the cylinder through the gear set, and driving the second cooling fan to rotate through the gear set. The air compressor has good heat dissipation efficiency.

Description

Technical Field

[0001] The present invention relates to an air compressor, in particular to a piston type air compressor. Background Art

[0002] The vehicle-mounted air compressor can be used with a tire repair bottle to repair and inflate the tires of the vehicle, and can also inflate the tires of the vehicle without using a tire repair bottle. The air compressor can be a piston air compressor, in which the piston advances in the cylinder to compress the air in the cylinder, thereby outputting high-pressure air from the front end of the cylinder. When the piston retreats in the cylinder, the space in the cylinder gradually becomes larger, causing the internal air pressure to drop, and is compressed when the piston advances next time, thus continuing the cycle. The piston air compressor heats up during operation, so a cooling fan is generally provided coaxially with the motor used to drive the piston. However, due to the compact internal configuration and small space of the air compressor, the flow efficiency of the cooling airflow is poor, and the above-mentioned heat dissipation design cannot effectively achieve sufficient heat dissipation effect. Summary of the Invention

[0003] The present invention is directed to an air compressor with good heat dissipation efficiency.

[0004] According to an embodiment of the present invention, an air compressor includes a cylinder, a frame, a gear set, a motor, a piston, a first cooling fan, and at least one second cooling fan. The frame is connected to the cylinder. The gear set includes a first gear, a second gear, and at least one third gear. The second gear is pivotally connected to the frame and meshes between the first gear and the third gear, and the third gear is pivotally connected to the frame. The motor is connected to the first gear. The first end of the piston is disposed in the cylinder, and the second end of the piston is connected to the second gear. The first cooling fan is connected to the motor. The second cooling fan is connected to the third gear. The motor is suitable for driving the first cooling fan to rotate, suitable for driving the first end of the piston to reciprocate along the cylinder through the gear set, and suitable for driving the second cooling fan to rotate through the gear set.

[0005] In an embodiment of the present invention, the second heat dissipation fan includes an axial flow fan or a centrifugal fan.

[0006] In an embodiment according to the present invention, the first end of the piston is located ahead of the second end of the piston in the front-rear direction of the air compressor, and the first gear and the third gear overlap each other in the front-rear direction.

[0007] In an embodiment of the present invention, the motor and the first gear are respectively located on two opposite sides of the frame.

[0008] In an embodiment of the present invention, the second cooling fan and the third gear are respectively located on two opposite sides of the frame.

[0009] In an embodiment according to the present invention, the connection between the first gear and the third gear passes through the center of the second gear.

[0010] In an embodiment according to the present invention, the connection between the first gear and the third gear does not pass through the center of the second gear.

[0011] In an embodiment of the present invention, the air compressor further includes at least one third cooling fan, wherein the second cooling fan and the third cooling fan are respectively connected to opposite sides of the third gear.

[0012] In an embodiment according to the present invention, in the front-rear direction of the air compressor, the first end of the piston is located in front of the second end of the piston and the motor is located in front of the second cooling fan.

[0013] In an embodiment of the present invention, in the front-rear direction of the air compressor, the first end of the piston is located in front of the second end of the piston and the motor is located behind the second cooling fan.

[0014] Based on the above, the air compressor of the present invention is equipped with a second cooling fan, not coaxial with the motor, in addition to a first cooling fan. The motor simultaneously drives the first and second cooling fans when the piston is actuated. Consequently, the first and second cooling fans can generate cooling airflow at different locations within the air compressor, effectively improving the compressor's heat dissipation efficiency. Furthermore, in the gear set coupled between the motor and the second cooling fan, the second and third gears are pivotally connected to the same frame, simplifying the gear set configuration and reducing manufacturing and assembly costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a partial structural perspective view of an air compressor according to an embodiment of the present invention;

[0016] Figure 2 yes Figure 1 A three-dimensional image of an air compressor from another perspective;

[0017] Figure 3 yes Figure 2 A perspective view of some components of an air compressor;

[0018] Figure 4 yes Figure 2 A top view of some components of an air compressor;

[0019] Figure 5 is a perspective view of an air compressor according to another embodiment of the present invention;

[0020] Figure 6 is a perspective view of an air compressor according to another embodiment of the present invention;

[0021] Figure 7 is a perspective view of an air compressor according to another embodiment of the present invention;

[0022] Figure 8 It is a perspective view of an air compressor according to another embodiment of the present invention. DETAILED DESCRIPTION

[0023] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0024] Figure 1 It is a partial structural perspective view of an air compressor according to an embodiment of the present invention, showing axial directions X, Y, and Z. Figure 2 yes Figure 1 The air compressor is shown in a different perspective. Figure 1 and Figure 2 The air compressor 100 of this embodiment is, for example, a vehicle-mounted air compressor for providing high-pressure air for inflating and / or repairing tires of a vehicle, but the present invention is not limited thereto. The air compressor 100 includes a housing 180, a cylinder 110, a frame 120 connected to the cylinder 110, a gear set 130, a motor 140, a piston 150, a first cooling fan 160, and a second cooling fan 170. The cylinder 110, the frame 120, the gear set 130, the motor 140, the piston 150, the first cooling fan 160, and the second cooling fan 170 are disposed within the housing 180. To make the drawings clearer, Figure 1 and Figure 2 The housing 180 in FIG. 1 only shows its lower half, and the housing 180 may actually include an upper half that is not shown to shield its internal components.

[0025] Figure 3 yes Figure 2 A three-dimensional view of some components of an air compressor. Figure 4 yes Figure 2 Top view of some components of the air compressor. Figures 2 to 4 In this embodiment, the gear set 130 includes a first gear 132, a second gear 134, and a third gear 136. The second gear 134, for example, is a reduction gear, which is pivotally connected to the frame 120 and meshes between the first gear 132 and the third gear 136. The third gear 136 is also pivotally connected to the frame 120. Specifically, the frame 120 may have an axial hole for pivotally connecting the first gear 132 and the third gear 136, and a bushing or bearing may be installed in the axial hole to enhance lubrication and wear resistance.

[0026] Motor 140 is coaxially connected to first gear 132. Motor 140 and first gear 132 are located on opposite sides of frame 120. A first end 152 of piston 150 is disposed in cylinder 110, and a second end 154 of piston 150 is connected to second gear 134. A first cooling fan 160, which may be an axial flow fan, a centrifugal fan, or another type of fan (an axial flow fan is shown), is coaxially connected to motor 140. A second cooling fan 170, which may be an axial flow fan, a centrifugal fan, or another type of fan (a centrifugal fan is shown), is coaxially connected to third gear 136. Second cooling fan 170 and third gear 136 are located on opposite sides of frame 120. Motor 140 is adapted to drive first cooling fan 160 to rotate, and is adapted to drive first end 152 of piston 150 to reciprocate along the cylinder via gear set 130. Furthermore, motor 140 is adapted to drive second cooling fan 170 to rotate via gear set 130.

[0027] The piston 150 advances within the cylinder 110, compressing the air within the cylinder 110 and causing high-pressure air to be output from the front end of the cylinder 110. As the piston 150 retreats within the cylinder 110, the space within the cylinder 110 gradually expands, causing the air pressure within the cylinder 110 to decrease. Then, when the air pressure within the cylinder 110 is lower than the pressure outside the cylinder 110, the outside air is drawn into the cylinder 110 through an intake valve provided on the cylinder 110 or the piston 150, or by other means. The air is then compressed the next time the piston 150 advances, and the cycle continues. The detailed principles and methods of how the piston 150 actuates to output high-pressure air are well known in the art and will not be elaborated upon here.

[0028] As described above, in the air compressor 100 of this embodiment, in addition to the first cooling fan 160 coaxial with the motor 140, a second cooling fan 170 is also provided, which is not coaxial with the motor 140. When the motor 140 drives the piston 150, it can simultaneously drive the first and second cooling fans 160, 170 to rotate. Consequently, the first and second cooling fans 160, 170 can generate cooling airflow at different locations within the air compressor 100, effectively improving the heat dissipation efficiency of the air compressor 100. Furthermore, in the gear set 130 coupled between the motor 140 and the second cooling fan 170, the second gear 134 and the third gear 136 are pivotally connected to the same frame 120, simplifying the configuration of the gear set 130 and reducing manufacturing and assembly costs.

[0029] In this embodiment, the first end 152 of the piston 150 is located ahead of the second end 154 of the piston 150 in the longitudinal direction (axial direction Y) of the air compressor 100. The first gear 132 and the third gear 136 overlap each other in the longitudinal direction (axial direction Y).

[0030] exist Figures 1 to 4 In the illustrated embodiment, the connection between the first gear 132 and the third gear 136 passes through the center of the second gear 134. However, the present invention is not limited thereto, and the positions of the gears may be changed based on space configuration and / or heat dissipation airflow planning considerations. This is illustrated below with reference to the accompanying drawings. Figure 5 It is a perspective view of an air compressor according to another embodiment of the present invention. Figure 5 The air compressor 100A shown is Figure 2 The difference of the air compressor 100 shown is that Figure 5 The position of the third gear 136 in is different from Figure 2 The position of the third gear 136 is such that Figure 5 The connection between the first gear 132 and the third gear 136 does not pass through the center of the second gear 134. In other embodiments, the third gear 136 may be disposed at another appropriate position adjacent to the second gear 134, or multiple gears may be added at multiple appropriate positions adjacent to the second gear 134, and multiple cooling fans connected to the additional gears may be provided accordingly to further enhance the heat dissipation effect.

[0031] exist Figures 1 to 4 In the illustrated embodiment, the third gear 136 is connected to one cooling fan (the second cooling fan 170 ). However, the present invention is not limited thereto, and the third gear 136 may be connected to more cooling fans depending on space configuration and / or cooling airflow planning. This is illustrated below with reference to the accompanying drawings. Figure 6 It is a perspective view of an air compressor according to another embodiment of the present invention. Figure 6 The air compressor 100B shown is Figure 2 The difference of the air compressor 100 shown is that Figure 6 The air compressor 100B further includes a third cooling fan 190 . The second cooling fan 170 and the third cooling fan 190 are respectively connected to opposite sides of the third gear 136 and can be driven to rotate by the third gear 136 at the same time.

[0032] exist Figures 1 to 4 In the illustrated embodiment, the motor 140 is located in front of the second cooling fan 170 in the front-to-back direction (axial direction Y) of the air compressor 100. However, the present invention is not limited to this, and the relative positions of the motor 140 and the second cooling fan 170 may be varied based on spatial configuration and / or cooling airflow planning considerations. This is illustrated below with reference to the accompanying figures. Figure 7 It is a perspective view of an air compressor according to another embodiment of the present invention. Figure 7 The air compressor 100C shown is Figure 2 The difference of the air compressor 100 is that Figure 7In the illustrated embodiment, the motor 140 is located behind the second heat dissipation fan 170 in the front-to-rear direction (axial direction Y) of the air compressor 100C.

[0033] Figure 8 It is a perspective view of an air compressor according to another embodiment of the present invention. Figure 8 The air compressor 100D shown is Figure 7 The difference between the air compressor 100C shown in FIG. 1 is that in the air compressor 100D, the second heat dissipation fan 170' is an axial flow fan instead of the Figure 7 The second heat dissipation fan 170 is a centrifugal fan.

[0034] In summary, the air compressor of the present invention is equipped with a second cooling fan, not coaxial with the motor, in addition to a first cooling fan. The motor simultaneously drives the first and second cooling fans while driving the piston. Consequently, the first and second cooling fans can generate cooling airflow at different locations within the air compressor, effectively improving the compressor's heat dissipation efficiency. Furthermore, in the gear set coupled between the motor and the second cooling fan, the second and third gears are pivotally connected to the same frame, simplifying the gear set configuration and reducing manufacturing and assembly costs.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air compressor, characterized in that: include: cylinder; a frame connected to the cylinder; a gear set comprising a first gear, a second gear, and at least one third gear, wherein the second gear is pivotally connected to the frame and meshed between the first gear and the at least one third gear, and the at least one third gear is pivotally connected to the frame; a motor connected to the first gear; a piston, wherein a first end of the piston is disposed in the cylinder and a second end of the piston is connected to the second gear; a first cooling fan connected to the motor; as well as At least one second cooling fan connected to the at least one third gear, The motor is adapted to drive the first cooling fan to rotate, to drive the first end of the piston to reciprocate along the cylinder through the gear set, and to drive the at least one second cooling fan to rotate through the gear set.

2. The air compressor according to claim 1, characterized in that The at least one second heat dissipation fan includes an axial flow fan or a centrifugal fan.

3. The air compressor according to claim 1, characterized in that In a front-to-rear direction of the air compressor, the first end of the piston is located in front of the second end of the piston, and the first gear and the at least one third gear overlap with each other in the front-to-rear direction.

4. The air compressor according to claim 1, characterized in that The motor and the first gear are respectively located on two opposite sides of the frame.

5. The air compressor according to claim 1, characterized in that The at least one second cooling fan and the at least one third gear are respectively located on two opposite sides of the frame.

6. The air compressor according to claim 1, characterized in that The connection between the first gear and the at least one third gear passes through the center of the second gear.

7. The air compressor according to claim 1, characterized in that The connection between the first gear and the at least one third gear does not pass through the center of the second gear.

8. The air compressor according to claim 1, characterized in that It also includes at least one third cooling fan, wherein the at least one second cooling fan and the at least one third cooling fan are respectively connected to opposite sides of the at least one third gear.

9. The air compressor according to claim 1, characterized in that In the front-to-rear direction of the air compressor, the first end of the piston is located in front of the second end of the piston, and the motor is located in front of the at least one second cooling fan.

10. The air compressor according to claim 1, characterized in that In the front-to-rear direction of the air compressor, the first end of the piston is located in front of the second end of the piston and the motor is located behind the at least one second cooling fan.

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