Air compressor structure

Abstract

The utility model provides an air compressor structure which comprises an air cylinder, a piston, a cover body and a non-return piece. 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. According to the air compressor structure provided by the utility model, a non-return function is provided for the runner through matching of simple components.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of air compressor structure. BACKGROUND

[0002] The main structure of air compressor is driven by motor piston reciprocating compression action in cylinder, compressed air can be filled to the air connected article.

[0003] In the air flow channel of the above air compressor, rubber plug is usually arranged with spring, to drive rubber plug by the elastic force of spring to close flow channel, or to drive rubber plug by compressed air to overcome the elastic force of spring to open flow channel, to be used as check valve. But, in actual operation, limited by the elastic force of spring and the hardness of rubber plug, the situation that flow channel cannot be completely closed often occurs, and the situation that flow channel cannot be opened due to the excessive elastic force of spring, or the situation that spring is tired with the increase of use time.

[0004] Accordingly, how to propose corresponding improvement measures for the above problems is the subject that relevant technical personnel need to think about. INVENTION CONTENTS

[0005] The utility model provides a kind of air compressor structure, which provides check function to flow channel by the collocation of simple component.

[0006] The air compressor structure of the utility model includes cylinder, piston, cover body and check piece. The cylinder has multiple air holes. The piston is reciprocatingly coupled in 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 arranged between the cylinder and the cover body. When the piston performs the first stroke, the piston moves close to the air hole to compress the air in the cylinder. The compressed air flows into the cover body after lifting the check piece through the air hole. 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] On the basis of the above necessary technical means, the check piece has two annular ribs facing the cylinder and the same center axis, which abut on the partition plate having multiple air holes.

[0008] On the basis of the above necessary technical means, the multiple air holes are arranged in a ring shape, and the orthographic projection of the multiple air holes on the check piece is located between the two annular ribs.

[0009] On the basis of the above necessary technical means, the check piece has top surface and bottom surface opposite to each other, and the two annular ribs are located on the bottom surface, and the pressing column is adapted to abut on the top surface.

[0010] On the basis of the necessary technical means, the check valve has at least one annular rib on the bowl outer bottom of the bowl-shaped profile, and the annular rib is flush with the bowl edge.

[0011] On the basis of the necessary technical means, the check valve has at least one annular rib on the bowl outer bottom of the bowl-shaped profile, and the annular rib is flush with the bowl edge.

[0012] On the basis of the necessary technical means, the check valve has at least one annular rib on the bowl outer bottom of the bowl-shaped profile, and the annular rib is flush with the bowl edge.

[0013] On the basis of the necessary technical means, the check valve has a limiting ring movably sleeved on the pressing column to limit the check valve.

[0014] On the basis of the necessary technical means, the piston has an opening and an air inlet valve, the air inlet valve is elastically deformed to cover the opening to open or close the opening, when the piston performs the second stroke, the air inlet valve is driven by the vacuum to lift the air from the outside environment to enter the cylinder through the opening, and when the piston performs the first stroke, the air inlet valve restores and closes the opening.

[0015] Based on the above, the air compressor structure is assembled with the cover to the cylinder, so that after the piston compresses the air in the cylinder, the compressed air is transmitted to the cover through the plurality of air holes of the cylinder. Further, the air compressor structure further comprises a check valve movably arranged between the cover and the cylinder, and the check valve can be lifted or sealed on the air hole under the influence of the airflow, thereby cooperating with the reciprocating motion of the piston in the cylinder to achieve the function of supplying or stopping the airflow.

[0016] Further, when the piston performs the first stroke (forward stroke), the piston compresses the air in the cylinder and transmits the compressed air to the cover through the air hole, at this time the compressed air drives the check valve to be lifted relative to the air hole, so that the compressed air flows smoothly into the cover. Conversely, when the piston performs the second stroke (return stroke), the piston moves away from the air hole at the moment, a vacuum is formed in the cylinder, at this time the cover still has the aforementioned compressed air, so that the pressure difference caused by the vacuum and the compressed air drives the check valve to cover and seal the air hole.

[0017] Accordingly, the movable check valve can cooperate with the movement of the piston and the compressed air or vacuum generated thereby to move correspondingly to complete the required check function. Compared with the check valve of the prior art, the check valve of the present application undoubtedly has a simple structure to complete the required function and achieve the effect of simplifying the components, and can also overcome the problems of the prior art.

[0018] In order to make the above features and advantages of the present application more obvious and easy to understand, the following embodiments are described in detail below, and the drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of an air compressor structure according to an embodiment of the present application;

[0020] Figure 2 and Figure 3 are exploded views of partial components of the air compressor structure, respectively, from different perspectives.

[0021] Figure 4 are partial cross-sectional views of the air compressor structure, respectively, from different perspectives.

[0022] Figure 5 and Figure 6 are partial cross-sectional views of the air compressor structure, respectively.

[0023] Figure 7A and Figure 7B is a partial cross-sectional view of an air compressor structure according to another embodiment of the present application.

[0024] Figure 8 is a partial cross-sectional view of an air compressor structure according to yet another embodiment of the present application. DETAILED DESCRIPTION

[0025] Figure 1 is a schematic view of an air compressor structure according to an embodiment of the present application. Figure 2 and Figure 3 are exploded views of partial components of the air compressor structure, respectively, from different perspectives. At the same time, orthogonal coordinates X-Y-Z are provided to facilitate component description. Please refer to Figures 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, an air reservoir 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 the motor 150, when powered, can drive the piston 130 to move reciprocally within the cylinder 110 through the transmission mechanism 140, thereby compressing the air within the cylinder 110, or allowing air from the external environment to flow into the cylinder 110 to replenish when the piston 130 moves away from the cover 120.

[0026] Figure 4 are partial cross-sectional views of the air compressor structure, respectively, from different perspectives. Please refer to Figures 2 to 4furthermore, the cylinder 110 comprises a cylindrical body 111, a plurality of protrusions 112 arranged annularly on the cylindrical surface of the body 111, and a partition 115 separating the inner space of the cover 120 from the inner space of the cylinder 110, wherein the partition 115 has a plurality of air holes 113 arranged annularly relative to the central axis CX of the body 111. As shown in Figure 3 , the inner side wall of the cover 120 has a plurality of clamping grooves 122, and the cover 120 further has a pressing column 121 located at the inner center, and a gas storage passage 123 corresponding to the inner space, so that the inner space of the cover 120 can be communicated to the gas storage seat 160 through the gas storage passage 123. Accordingly, the cover 120 is assembled to the body 111 of the cylinder 110 through the mutual matching of the protrusions 112 and the clamping grooves 122, and the inner space of the cover 120 is adjacent to the inner space of the cylinder 110 through the partition 115, and the two inner spaces are communicated through the air holes 113.

[0027] In addition, as shown in Figure 1 , the gas storage seat 160 has a gas outlet 161 to connect to the object to be inflated, such as a tire (not shown), and a pressure gauge 170 is arranged to let the user know the air pressure of the gas storage seat 160. Simply put, when the piston 130 is driven to perform reciprocating stroke in the cylinder 110, compressed air can be continuously generated and transmitted from the inner space of the cylinder 110 to the object to be inflated through the inner space of the cover 120, the gas storage passage 123, the gas storage seat 160, and the gas outlet 161, so as to inflate the object to be inflated.

[0028] As shown in Figure 2 , Figure 3 , the reverse stop sheet 180 of the present embodiment is arranged between the cylinder 110 and the cover 120, and the reverse stop sheet 180 is in a bowl-shaped profile so that the pressing column 121 of the cover 120 corresponds to the inner bottom 184 of the bowl of the reverse stop sheet 180. The reverse stop sheet 180 also has two annular ribs facing the cylinder 110 and the central axis CX, which are distinguished as the outer annular rib 182 and the inner annular rib 181, respectively, abutting against the partition 115 of the cylinder 110, so as to reduce the contact area between the bowl-shaped profile and the partition 115. Simply put, the reverse stop sheet 180 of the present embodiment has a top surface (the inner bottom 184 of the bowl) opposite to a bottom surface, the top surface is flat to be pressed by the pressing column 121, and the annular ribs are located at the bottom surface to be supported on the partition 115. Furthermore, the cylinder 110 also has a limiting ring 114 extending from the partition 115, and the bowl rim 183 of the bowl-shaped profile abuts against the inner annular wall of the limiting ring 114.

[0029] Figure 5 and Figure 6 are partial sectional views of the air compressor structure. Please refer to Figure 5 and Figure 6In this embodiment, since the check sheet 180 is covered on the air hole 113 of the partition plate 115, the check sheet 180 can be moved between the pressing column 121 and the partition plate 115 (along the Z axis) by the air flow, as shown by the dotted arrow, and the details are as follows.

[0030] As shown in Figure 5 , at this time, the piston 130 performs the first stroke (forward stroke), that is, the top end of the piston 130 moves towards the partition plate 115 to compress the air originally between the piston 130 and the partition plate 115, and the compressed air is transmitted 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 sheet 180, so that the bottom 184 in the bowl of the check sheet 180 abuts against the pressing column 121, and the bowl rim 183 is driven by the compressed air to move away from the inner ring wall of the limiting ring 114 (indicated in Figure 4 ), so that the compressed air can smoothly flow into the internal space of the cover 120.

[0031] As shown in Figure 6 , when the piston 130 performs the second stroke (return stroke), a vacuum is formed in the cylinder 110 at the moment when the top end of the piston 130 moves away from the air hole 113. At this time, the check sheet 180 is driven by the vacuum and the compressed air (in the internal space of the cover 120) to move towards the negative Z axis direction to abut against the partition plate 115 and cover the air hole 113, and the bowl rim 183 abuts against the inner ring wall of the limiting ring 114 (indicated in Figure 4 ). At the same time, the top end of the piston 130 moving away from the partition plate 115 also forms a gap G3 between the inner wall of the cylinder 110 to allow the air of the external environment to enter the cylinder 110, so as to facilitate the compression of the air entering the cylinder 110 by the piston 130 when performing the first stroke next time.

[0032] As shown in Figure 2 , the air holes 113 of this embodiment are arranged in a ring shape relative to the center axis CX, and as shown in Figure 5 or Figure 6 , the orthographic projection of the air hole 113 on the check sheet 180 is located between the two ring ribs (the outer ring rib 182 and the inner ring rib 181). This allows the bottom surface of the check sheet 180 to reduce the contact area with the partition plate 115 through the outer ring rib 182 and the inner ring rib 181, so that the compressed air passing through the air hole 113 can smoothly lift the check sheet 180. When the piston 130 performs the second stroke, the check sheet 180 is pushed back by the compressed air in the cover 120 due to the vacuum and the compressed air in the cover 120, and the outer ring rib 182 is blocked between the air hole 113 and the internal space of the cover 120, and at the same time, the bowl rim 183 also abuts to the inner ring wall of the limiting ring 114 again, and the outer ring rib 182 provides the required check (prevents the compressed air at the cover 120 from flowing back to the cylinder 110) function.

[0033] Please refer to Figure 5 With Figure 6 In the air compressor structure 100 of the present embodiment, the piston 130 has an opening 131 and an air inlet shutter 190, which is elastically deformable to cover the opening 131 to open or close the opening 131. When the piston 130 performs the second stroke, as shown in Figure 6 , the air inlet shutter 190 is deformed by the vacuum to allow the air from the external environment to lift the air inlet shutter 190 and enter the cylinder 110 through the opening 131, while when the piston 130 performs the first stroke, as shown in Figure 5 , the air inlet shutter 190 is restored and closes the opening 131. Here, the air inlet shutter 190 is fixed to the top of the piston 130 by the fixing member 132b, and the other side not fixed is kept in a free state 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 the top thereof to provide a stop function for the air inlet shutter 190 lifted when the piston 130 performs the second stroke, so as to avoid excessive deformation of the air inlet shutter 190 and ensure that it can be smoothly restored when the piston 130 performs the first stroke.

[0034] Figure 7A With Figure 7B is a partial sectional view of an air compressor structure according to another embodiment of the present utility model. Please refer to Figure 7A With Figure 7B , the piston 130 is in different states as shown in Figure 5 With Figure 6 , and the reverse stop sheet 280 of the present embodiment includes a limiting ring 281, an inner ring rib 181, an outer ring rib 182, a bowl rim 183, and a recess 282. The inner ring rib 181, the outer ring rib 182, and the bowl rim 183 have been described in the foregoing embodiment, and will not be repeated here. The limiting ring 281 is extended and protruded from the bowl inner bottom 184 and correspondingly and movably sleeved on the pressing column 121, so that when the reverse stop sheet 280 moves along the Z axis as the foregoing reverse stop sheet 180, the pressing column 121 can always keep the sleeving relationship with the limiting ring 281, and the pressing column 121 provides the limiting effect in the X-Y plane for the reverse stop sheet 280.

[0035] Figure 8 is a partial sectional view of an air compressor structure according to another embodiment of the present utility model. Please refer to Figure 8 and compare with Figure 7A or Figure 7BIn the present embodiment, the check valve 380 comprises a limiting ring 381, an inner ring rib 382, an outer ring rib 383, and a bowl rim 384, and the inner ring rib 382 further forms a recess 385 on the bowl bottom. 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 aforementioned embodiments (the limiting ring 281, the inner ring rib 181, the outer ring rib 182, and the bowl rim 183), the check valve 380 further increases the structural strength of the check valve 380 by increasing the structural thickness, the structural width, and the profile undulation, so as to improve the durability of the check valve 380. The formation of the recess 385 is also a means for reducing the contact area between the check valve 380 and the partition plate 115 in response to the increase in the aforementioned structural thickness and width, so that the check valve 380 can still be smoothly driven by compressed air. In addition, compared with the recess 282 (the check valve 180 is the same) formed by the step difference between the bowl rim 183 and the outer ring rib 182 of the aforementioned check valve 280, the annular rib (the outer ring rib 383) and the bowl rim 384 of the present embodiment are in an outwardly flush state, and the purpose is also to effectively increase the structural strength of the check valve 380 under the premise that the outer ring rib 383 can smoothly complete the functions of the aforementioned embodiments.

[0036] In summary, in the above-mentioned embodiments of the present application, the air compressor structure is provided with the movable check valve and the pressing column of the cover body, so that the check valve can be opened and closed relative to the air hole under the influence of the airflow, so as to pass the compressed air when opened, and seal the air hole when closed to achieve the required check function.

[0037] Further, when the piston performs the first stroke (forward stroke), 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 drives the check valve together. Since the bottom surface of the check valve is provided with an annular rib, the contact area between the check valve and the partition plate is reduced, so that the compressed air can smoothly lift the check valve and be transmitted to the internal space of the cover body. At this time, the check valve moves upward and stops at the pressing column of the cover body.

[0038] Conversely, when the piston performs the second stroke (return stroke), a vacuum is formed in the cylinder at the moment when the piston moves away from the air hole. At this time, the cover body still has the aforementioned compressed air, so that a pressure difference is caused to the check valve by the vacuum, so as to drive the check valve to reset to a position covering and sealing the air hole. The check valve abuts against the limiting ring of the cylinder through the bowl rim, and abuts against the partition plate through the annular rib, so as to keep the compressed air in the cover body and prevent the compressed air from flowing back to the cylinder. At the same time, the air in the external environment can 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, so as to be used for the next first stroke of the piston.

[0039] Accordingly, the movable check valve can be matched with the movement of the piston and the compressed air or vacuum generated thereby, and can be moved to complete the required passage of the compressed air or check function. Compared with the prior art check valve, the movable check valve of the present application has obviously achieved the effect of simplifying the components, and thus overcomes the related problems faced by the prior art check valve.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An air compressor structure, characterized by, 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, an inner space of the cylinder and an inner space of the cover being in communication with each other through the plurality of air holes; and a check flap movably disposed between the cylinder and the cover, when the piston performs a first stroke, the piston moves towards the plurality of air holes to compress air within the cylinder, the compressed air flows into the cover after passing through the plurality of air holes, lifting the check flap, when the piston performs a second stroke, a vacuum is formed within the cylinder at the moment the piston moves away from the plurality of air holes, the check flap is driven by the vacuum and the compressed air within the cover to cover and seal the plurality of air holes. The check flap has two annular ribs facing the cylinder and coaxial with each other, abutting against a partition plate of the cylinder, the partition plate having the plurality of air holes.

2. The air compressor structure according to claim 1, 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 flap is located between the two annular ribs.

3. The air compressor structure according to claim 2, wherein The check flap 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.

4. The air compressor structure according to claim 2, wherein The check flap has a bowl-shaped profile, and the cylinder further has a partition plate and a limiting ring extending from the partition plate, a bowl edge of the bowl-shaped profile abuts against an inner ring wall of the limiting ring, the pressing post is adapted to abut against a bowl inner bottom of the bowl-shaped profile, and the partition plate has the plurality of air holes.

5. The air compressor structure according to claim 1, wherein The check flap has at least one annular rib located on a bowl outer bottom of the bowl-shaped profile, and the annular rib is flush with the bowl edge.

6. The air compressor structure according to claim 5, wherein The check flap has at least one annular rib located on a bowl outer bottom of the bowl-shaped profile, and the annular rib has a step difference with the bowl edge to form a recess.

7. The air compressor structure according to claim 5, wherein The check flap has a limiting ring movably sleeved on the pressing post to limit the check flap by the pressing post.

8. The air compressor structure according to claim 1, wherein The piston has an opening and an air inlet flap, the air inlet flap is elastically deformable to cover the opening to open or close the opening, when the piston performs the second stroke, the air inlet flap 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 air inlet flap restores and closes the opening.

9. The air compressor structure according to claim 1, wherein ​

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