Air compressor structure

Abstract

The invention provides an air compressor structure. The air compressor structure comprises a cylinder, a piston, a cover body and a non-return sheet, the cylinder has a plurality of air holes. A piston is reciprocally coupled within the cylinder. The cover body is assembled to the cylinder. The cover body is provided with an abutting column. An inner space of the cylinder and an inner space of the cover body communicate with each other through the air hole. The non-return sheet is movably arranged between the cylinder and the cover body. When the piston executes the first stroke, the piston moves close to the air hole to compress air in the air cylinder, and the compressed air passes through the air hole and then lifts the non-return piece to flow into the cover body. When the piston executes the second stroke, vacuum is formed in the cylinder at the moment that the piston moves away from the air hole. The non-return sheet is driven by vacuum and compressed air to cover and seal the air hole.

Description

Technical Field

[0001] The present invention relates to an air compressor structure. Background Art

[0002] The main structure of an air compressor is to drive a piston to perform a reciprocating compression action in a cylinder through a motor, and the compressed air can be filled into an article to be inflated connected thereto.

[0003] In the air flow passage of the above air compressor, a rubber plug is usually provided with a spring to drive the rubber plug to close the passage through the elastic force of the spring, or to drive the rubber plug to overcome the elastic force of the spring through compressed air to open the passage, so as to be used as a check valve. However, in actual operation, limited by the elastic force of the spring and the hardness of the rubber plug, the situation that the passage cannot be completely closed often occurs, and there is also a situation that the passage cannot be opened due to the excessive elastic force of the spring, or even the spring becomes fatigued as the use time increases.

[0004] Therefore, how to propose corresponding improvement measures for the above problems is a topic that relevant technical personnel need to think about. Summary of the Invention

[0005] The present invention is directed to an air compressor structure, which provides a check function for the flow passage through the combination of simple components.

[0006] According to an embodiment of the present invention, the air compressor structure includes a cylinder, a piston, a cover body, and a check piece. The cylinder has a plurality of air holes. The piston is reciprocally coupled to the inside of the cylinder. The cover body is assembled to the cylinder. The cover body has a pressing column. The internal space of the cylinder and the internal space of the cover body are communicated with each other through the air holes. The check piece is movably disposed between the cylinder and the cover body. When the piston performs the first stroke, the piston moves closer to the air hole to compress the air in the cylinder, and the compressed air passes through the air hole and then lifts the check piece and flows into the cover body. When the piston performs the second stroke, a vacuum is formed in the cylinder at the moment when the piston moves away from the air hole. The check piece is driven by the vacuum and the compressed air to cover and seal the air hole.

[0007] Based on the above, the air compressor structure of the present invention assembles the cover body to the cylinder, so that after the piston compresses the air in the cylinder, the compressed air is transmitted to the cover body through the plurality of air holes of the cylinder. Furthermore, the air compressor structure further includes a check piece movably disposed between the cover body and the cylinder, and the check piece can be lifted or sealed at the air hole under the influence of the air flow, and then cooperate with the reciprocating movement of the piston in the cylinder to achieve the function of allowing the gas to pass through or check.

[0008] Furthermore, when the piston performs the first stroke (process), the piston compresses the air in the cylinder and transmits the compressed air to the cover body through the air hole. At this time, the compressed air will drive the check valve together, and the check valve will be lifted relative to the air hole so that the compressed air can flow into the cover body smoothly. On the contrary, when the piston performs the second stroke (return stroke), a vacuum will be formed in the cylinder the moment the piston moves away from the air hole. At this time, there is still the aforementioned compressed air at the cover body. Therefore, a pressure difference is created on the check valve by the vacuum and the compressed air, and the check valve is driven to cover and seal the air hole.

[0009] Accordingly, the movable check valve can cooperate with the movement of the piston and the compressed air or vacuum generated thereby to perform corresponding movements to complete the required check valve function. Compared with the check valve of the prior art, the check valve of this case can undoubtedly achieve the required function with a simple structure, resulting in the simplification of components. At the same time, it can also overcome the related problems of the aforementioned prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the air compressor structure according to an embodiment of the present invention;

[0011] Figure 2 and Figure 3 respectively show the exploded views of some components of the air compressor structure from different perspectives;

[0012] Figure 4 shows a partial cross-sectional view of the air compressor structure from a three-dimensional perspective;

[0013] Figure 5 and Figure 6 are respectively partial cross-sectional views of the air compressor structure;

[0014] Figure 7A and Figure 7B is a partial cross-sectional view of the air compressor structure according to another embodiment of the present invention;

[0015] Figure 8 is a partial cross-sectional view of the air compressor structure according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used in the drawings and the description to refer to the same or like parts.

[0017] Figure 1 is a schematic diagram of the air compressor structure according to an embodiment of the present invention. Figure 2 and Figure 3 respectively show the exploded views of some components of the air compressor structure from different perspectives. At the same time, the rectangular coordinate X-Y-Z is provided to facilitate the description of the components. Please refer toFigures 1 to 3 , in this embodiment, the air compressor structure 100 includes a cylinder 110, a piston 130, a cover 120, a transmission mechanism 140, a check valve 180, a motor 150, a gas storage base 160 and a pressure gauge 170. The transmission mechanism 140 is connected between the bottom end of the piston 130 and the motor 150, and the bottom end of the piston 130 is connected to the transmission mechanism 140. The top end of the piston 130 is movably coupled within the cylinder 110, so that after the motor 150 is powered on, it can drive the piston 130 to reciprocate within the cylinder 110 through the transmission mechanism 140, and thereby compress the air within the cylinder 110, or when the piston 130 moves away from the cover 120, the air in the external environment flows into the cylinder 110 for replenishment.

[0018] Figure 4 A partial cross-sectional view of the air compressor structure is shown from a three-dimensional perspective. Please also refer to Figures 2 to 4 , further, the cylinder 110 includes a cylindrical main body 111, a plurality of convex portions 112 provided on the cylindrical surface of the main body 111, and a partition plate 115 for separating the internal space of the cover 120 from the internal space of the cylinder 110. The partition plate 115 has a plurality of air holes 113, which are arranged in a ring shape with respect to the central axis CX of the main body 111. As Figure 3 shown, the inner side wall of the cover 120 has a plurality of card slots 122, and the cover 120 also has a pressing column 121 located at the center of the interior and a gas storage passage 123 corresponding to the internal space, so that the internal space of the cover 120 can communicate with the gas storage base 160 through the gas storage passage 123. Accordingly, through the mutual cooperation of the convex portions 112 and the card slots 122, the cover 120 is assembled to the main body 111 of the cylinder 110, and the internal space of the cover 120 is adjacent to the internal space of the cylinder 110 through the partition plate 115, and the two internal spaces are communicated through the air holes 113.

[0019] In addition, as Figure 1 shown, the gas storage base 160 has an air outlet 161 to connect to an object to be inflated, such as a tire (not shown), and a pressure gauge 170 is provided therebetween so that the user can know the air pressure of the gas storage base 160. Briefly, when the piston 130 is driven to reciprocate within the cylinder 110, compressed air can be continuously generated and sequentially passed from the internal space of the cylinder 110 through the internal space of the cover 120, the gas storage passage 123, the gas storage base 160 and transmitted from the air outlet 161 to the object to be inflated to inflate the object to be inflated.

[0020] As Figure 2 , Figure 3As shown, the check valve 180 of this embodiment is disposed between the cylinder 110 and the cover 120, and the check valve 180 has a bowl-shaped contour such that the pressing post 121 of the cover 120 corresponds to the inner bottom 184 of the bowl of the check valve 180. The check valve 180 further has two annular ribs facing the cylinder 110 and coaxial with the central axis CX, and herein they are distinguished as the outer annular rib 182 and the inner annular rib 181, which respectively abut against the partition 115 of the cylinder 110, so as to reduce the contact area between the bowl-shaped contour and the partition 115. Simply put, the check valve 180 of this embodiment has a top surface (inner bottom 184 of the bowl) and a bottom surface opposite to each other. The top surface is flat to be pressed by the pressing post 121, and the annular ribs are located on the bottom surface to rest on the partition 115. Furthermore, the cylinder 110 further has a limiting ring 114 extending from the partition 115, and the rim 183 of the bowl-shaped contour abuts against the inner wall of the inner ring of the limiting ring 114.

[0021] Figure 5 and Figure 6 are respectively partial cross-sectional views of the air compressor structure. Please also refer to Figure 5 and Figure 6 , in this embodiment, since the check valve 180 covers the air hole 113 of the partition 115, the check valve 180 can be affected by the air flow and move (along the Z-axis) between the pressing post 121 and the partition 115, as described in detail below, where the air flow path is shown by a dotted arrow.

[0022] As Figure 5 shown, at this time the piston 130 executes the first stroke (process), that is, the top of the piston 130 moves towards the partition 115 to compress the air originally between the piston 130 and the partition 115, and transfer the compressed air from the internal space of the cylinder 110 to the internal space of the cover 120 through the air hole 113. At this time, the compressed air can lift the check valve 180 so that the inner bottom 184 of the bowl of the check valve 180 abuts against the pressing post 121, and the rim 183 is also driven by the compressed air to move away from the inner wall of the inner ring of the limiting ring 114 (marked in Figure 4 ), so that the compressed air can smoothly flow into the internal space of the cover 120.

[0023] As Figure 6 shown, when the piston 130 executes the second stroke (return stroke), a vacuum will be formed in the cylinder 110 the moment the top of the piston 130 moves away from the air hole 113. At this time, the check valve 180 is driven by the vacuum and the compressed air (in the internal space of the cover 120) to move in the negative Z-axis direction, so as to abut against the partition 115 and cover the air hole 113, and the rim 183 abuts against the limiting ring 114 (marked in Figure 4The inner wall of the inner ring. At the same time, a gap G3 is formed between the top end of the piston 130 moving away from the partition 115 and the inner wall of the cylinder 110 to allow air from the external environment to enter the cylinder 110, facilitating the compression of the air entering the cylinder 110 by the piston 130 during the next execution of the first stroke.

[0024] As Figure 2 shown, the air holes 113 of this embodiment are arranged in a ring relative to the central axis CX. And as Figure 5 or Figure 6 shown, the orthographic projection of the air holes 113 on the check valve piece 180 is located between two annular ribs (the outer annular rib 182 and the inner annular rib 181). This reduces the contact area between the bottom surface of the check valve piece 180 and the partition 115 through the outer annular rib 182 and the inner annular rib 181, facilitating the compressed air passing through the air holes 113 to smoothly lift the check valve piece 180. When the piston 130 performs the second stroke, due to the vacuum and the compressed air in the cover 120, the check valve piece 180 is pushed back by the compressed air in the cover 120, and the outer annular rib 182 blocks the space between the air holes 113 and the internal space of the cover 120. At the same time, the bowl edge 183 will again abut against the inner wall of the limiting ring 114, and together with the outer annular rib 182, it provides the required check (preventing the compressed air at the cover 120 from flowing back into the cylinder 110) function.

[0025] Please refer to Figure 5 and Figure 6 . In the air compressor structure 100 of this embodiment, the piston 130 has an opening 131 and an air intake blocking piece 190. The air intake blocking piece 190 elastically deforms to cover the opening 131 to open or close the opening 131. When the piston 130 performs the second stroke, as Figure 6 shown, the air intake blocking piece 190 is lifted by the vacuum, allowing air from the external environment to enter the cylinder 110 through the opening 131. When the piston 130 performs the first stroke, as Figure 5 shown, the air intake blocking piece 190 returns to its original state and closes the opening 131. Here, the air intake blocking piece 190 is fixed to the top of the piston 130 by a fixing member 132b, and the unfixed side remains free, enabling it to be smoothly driven by the air flow to open or close the opening 131. At the same time, the piston 130 is also provided with a stop member 132a at its top to provide a stop function for the lifted air intake blocking piece 190 when the piston 130 performs the second stroke, preventing the air intake blocking piece 190 from deforming too much and ensuring its smooth reset when the piston 130 performs the first stroke.

[0026] Figure 7A and Figure 7B are partial cross-sectional views of an air compressor structure according to another embodiment of the present invention. Please refer to Figure 7A and Figure 7B , where the piston 130 is asFigure 5 is in a different state from that shown in Figure 6 and the check valve piece 280 of this embodiment includes a limiting ring 281, an inner ring rib 181, an outer ring rib 182, a bowl rim 183 and a recess 282. Among them, the inner ring rib 181, the outer ring rib 182 and the bowl rim 183 have been described in the foregoing embodiments and will not be elaborated here. The limiting ring 281 extends and protrudes from the inner bottom 184 of the bowl and is correspondingly and movably sleeved on the pressing column 121, so that when the check valve piece 280 moves along the Z-axis like the foregoing check valve piece 180, the pressing column 121 can always maintain the sleeved relationship with the limiting ring 281, and the pressing column 121 provides a limiting effect on the check valve piece 280 in the X-Y plane.

[0027] Figure 8 is a partial cross-sectional view of the air compressor structure according to another embodiment of the present invention. Please refer to Figure 8 and compare with Figure 7A or Figure 7B , in this embodiment, the check valve piece 380 includes a limiting ring 381, an inner ring rib 382, an outer ring rib 383 and a bowl rim 384. At the same time, the inner ring rib 382 further forms a recess 385 on the outer bottom of the bowl. Here, in addition to the limiting ring 381, the inner ring rib 382, the outer ring rib 383 and the bowl rim 384 having the same functions as the foregoing embodiments (limiting ring 281, inner ring rib 181, outer ring rib 182 and bowl rim 183), the check valve piece 380 further improves the structural strength of the check valve piece 380 by increasing the structural thickness, structural width and contour undulation, so as to improve the durability of the check valve piece 380. The formation of the recess 385 is also a means to reduce the contact area between the check valve piece 380 and the partition 115 in response to the increase in the foregoing structural thickness and width, so that the check valve piece 380 can still be smoothly driven by compressed air. In addition, compared with the recess 282 formed by the step between the bowl rim 183 and the outer ring rib 182 in the foregoing check valve piece 280 (the same as the check valve piece 180), the annular rib (outer ring rib 383) and the bowl rim 384 in this embodiment are in an outwardly extended and flush state. The purpose is also to effectively increase the structural strength of the check valve piece 380 on the premise that the outer ring rib 383 can successfully complete the functions of the foregoing embodiments.

[0028] In summary, in the above embodiments of the present invention, the air compressor structure uses a movable check valve piece and cooperates with the pressing column of the cover body, so that the check valve piece can be opened and closed relative to the air hole under the influence of the air flow, so as to allow compressed air to pass through when opened and seal the air hole when closed to achieve the required check valve function.

[0029] Furthermore, when the piston performs the first stroke (process), the piston compresses the air in the cylinder and transmits the compressed air to the cover body through the air hole. At this time, the compressed air will drive the check valve plate together. Since there is an annular rib on the bottom surface of the check valve plate, the contact area between the check valve plate and the partition plate is reduced. Therefore, the compressed air can smoothly lift the check valve plate and be transmitted to the internal space of the cover body. At this time, the check valve plate moves upward and stops against the pressing column of the cover body.

[0030] Conversely, when the piston performs the second stroke (return stroke), a vacuum will be formed in the cylinder at the moment the piston moves away from the air hole. At this time, there is still the aforementioned compressed air at the cover body. Therefore, a pressure difference is created on the check valve plate due to the vacuum, and the check valve plate can be driven to reset to the position where it covers and seals the air hole. The check valve plate abuts against the limit ring of the cylinder through its bowl edge, and the annular rib abuts against the partition plate, so as to keep the compressed air at the cover body and prevent the compressed air from flowing back into the cylinder. At the same time, the air in the external environment can also flow into the cylinder through the opening of the piston and the gap between the piston and the cylinder wall due to the aforementioned vacuum, for use in the next first stroke of the piston.

[0031] Accordingly, the movable check valve plate can cooperate with the movement of the piston and the compressed air or vacuum generated thereby, and perform corresponding movements to complete the required functions of allowing the compressed air to pass through or preventing backflow. Compared with the check valve of the prior art, the check valve plate in this case has significantly achieved the effect of simplifying the components, and at the same time has overcome the related problems faced by the check valve of the prior art.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 structure, characterized in that, Comprising: A cylinder having a plurality of air holes; A piston reciprocally coupled within the cylinder; A cover assembled to the cylinder, the cover having a pressing post, and the internal space of the cylinder and the internal space of the cover being in communication with each other through the plurality of air holes; And A check valve plate movably disposed between the cylinder and the cover, When the piston performs a first stroke, the piston moves closer to the plurality of air holes to compress the air within the cylinder, and the compressed air passes through the plurality of air holes and then lifts the check valve plate to flow into the cover, When the piston performs a second stroke, a vacuum is formed within the cylinder at the moment when the piston moves away from the plurality of air holes, and the check valve plate is driven by the vacuum and the compressed air located within the cover to cover and seal the plurality of air holes.

2. The air compressor structure according to claim 1, wherein, The check valve plate has two annular ribs facing the cylinder and concentric with the central axis, and abuts against a partition plate of the cylinder, and the partition plate has the plurality of air holes.

3. The air compressor structure according to claim 2, wherein, The plurality of air holes are arranged in a ring shape, and the orthographic projection of the plurality of air holes on the check valve plate is located between the two annular ribs.

4. The air compressor structure according to claim 2, characterized in that, The check valve plate has a top surface and a bottom surface opposite to each other, the two annular ribs are located on the bottom surface, and the pressing post is adapted to abut against the top surface.

5. The air compressor structure according to claim 1, characterized in that, The check valve plate has a bowl-shaped profile, and the cylinder further has a partition plate and a limiting ring extending from the partition plate, the bowl edge of the bowl-shaped profile abuts against the inner wall of the limiting ring, the pressing post is adapted to abut against the inner bottom of the bowl of the bowl-shaped profile, and the partition plate has the plurality of air holes.

6. The air compressor structure according to claim 5, characterized in that, The check valve plate has at least one annular rib located on the outer bottom of the bowl of the bowl-shaped profile, and the annular rib is flush with the bowl edge.

7. The air compressor structure according to claim 5, characterized in that, The check valve plate has at least one annular rib located on the outer bottom of the bowl of the bowl-shaped profile, and there is a step difference between the annular rib and the bowl edge to form a depression.

8. The air compressor structure according to claim 1, characterized in that The check valve plate has a limiting ring movably sleeved on the pressing post to limit the check valve plate by the pressing post.

9. The air compressor structure according to claim 1, characterized in that, The piston has an opening and an intake air resistance plate, and the intake air resistance plate is elastically deformable to cover the opening to open or close the opening. When the piston performs the second stroke, the intake air resistance plate is lifted by the vacuum to allow air from the external environment to enter the cylinder through the opening, and when the piston performs the first stroke, the intake air resistance plate returns to its original state and closes the opening.

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