TWM661012U - Air compressor structure - Google Patents

Abstract

An air compressor structure including a cylinder having a plurality air holes, a piston reciprocally coupled in the cylinder, a cover assembled to the cylinder and having a column, and a anti-return piece movably disposed between the cover and the cylinder is provided. In a first stroke of the piston, the piston compresses an air inside the cylinder and moves closed to the air holes so as to drive the compressed air into the cover by passing through the air holes and lifting up the anti-return piece. In a second stroke of the piston, a vacuum is formed in the cylinder at the moment of the piston leaving the air holes, wherein the anti-return piece moves toward to cover and seal the air holes by the compressed air and the vacuum.

Description

Air compressor structure

This novel invention relates to an air compressor structure.

The main structure of an air compressor is that a motor drives a piston to perform a reciprocating compression action in a cylinder, and the compressed air can be used to fill the inflatable items connected to it.

In the air flow passage of the above-mentioned air compressor, a rubber plug is usually provided with a spring, so that the spring force drives the rubber plug to close the flow passage, or the compressed air drives the rubber plug to overcome the spring force to open the flow passage, so as to be used as a check valve. However, in actual operation, due to the limitation of the spring force and the hardness of the rubber plug, the flow passage often cannot be completely closed, and there are also cases where the flow passage cannot be opened due to excessive spring force, or even the spring becomes fatigued as the use time increases.

Therefore, how to propose corresponding improvement measures for the above problems is a topic that relevant technical personnel need to think about.

The novel invention provides an air compressor structure, which provides a non-return function to the flow passage through the combination of simple components.

The air compressor structure of the novel invention includes a cylinder, a piston, a cover body and a check plate. The cylinder has a plurality of air holes. The piston is reciprocatingly coupled in the cylinder. The cover body is assembled to the cylinder. The cover body has a compression column. The internal space of the cylinder and the internal space of the cover body are connected to each other through the air holes. The check plate 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 passes through the air hole, lifts the check plate and flows into the cover body. When the piston performs the second stroke, a vacuum is formed in the cylinder at the moment the piston moves away from the air hole. The check plate is driven by the vacuum and the compressed air to cover and seal the air hole.

Based on the above, the air compressor structure of the present invention is to assemble 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 multiple air holes in the cylinder. Furthermore, the air compressor structure also includes a check plate movably arranged between the cover body and the cylinder, and the check plate can be opened or sealed in the air hole under the influence of the air flow, and then cooperate with the reciprocating motion of the piston in the cylinder to achieve the function of providing air to pass or checking the return.

Specifically, 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 will drive the check plate, and the check plate will be opened relative to the air hole to allow the compressed air to flow smoothly into the cover body. On the contrary, when the piston performs the second stroke (return stroke), a vacuum will be formed in the cylinder when the piston moves away from the air hole. At this time, there is still the aforementioned compressed air in the cover body, so the vacuum and the compressed air will cause a pressure difference on the check plate, so that the check plate can be driven to cover and seal the air hole.

Accordingly, the movable check plate can move in accordance with the movement of the piston and the compressed air or vacuum generated thereby to achieve the required check valve function. Compared with the check valve of the prior art, the check plate of the present invention can undoubtedly achieve the required function with a simple structure and achieve the effect of simplifying the components, while also overcoming the related problems of the prior art mentioned above.

FIG. 1 is a schematic diagram of an air compressor structure according to an embodiment of the present invention. FIG. 2 and FIG. 3 respectively show exploded views of some components of the air compressor structure from different viewing angles. A rectangular coordinate X-Y-Z is provided here to facilitate component description. Please refer to FIG. 1 to FIG. 3 at the same time. In this embodiment, the air compressor structure 100 includes a cylinder 110, a piston 130, a cover 120, a transmission mechanism 140, a check plate 180, a motor 150, a gas storage seat 160 and a pressure gauge 170, wherein 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 and the top end of the piston 130 are movably coupled to the cylinder 110, so that the motor 150 can drive the piston 130 to reciprocate in the cylinder 110 through the transmission mechanism 140 after receiving power, thereby compressing the air in the cylinder 110, or allowing the air from the external environment to flow into the cylinder 110 for replenishment when the piston 130 is away from the cover 120.

FIG4 is a partial cross-sectional view of the air compressor structure in a three-dimensional perspective. Please refer to FIG2 to FIG4 at the same time. In further detail, the cylinder 110 includes a cylindrical body 111, a plurality of protrusions 112 arranged on the cylindrical surface of the body 111, and a partition 115 for 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 in a ring shape relative to the central axis CX of the body 111. As shown in FIG3 , the inner wall of the cover 120 has a plurality of slots 122, and the cover 120 also has a pressure column 121 located at the center of the inner portion, and a gas storage channel 123 corresponding to the inner space, so that the inner space of the cover 120 can be connected to the gas storage seat 160 through the gas storage channel 123. Accordingly, the cover 120 is assembled to the body 111 of the cylinder 110 through the mutual matching of the protrusion 112 and the slot 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 hole 113.

In addition, as shown in FIG. 1 , the air storage seat 160 has an air outlet 161 to connect to an inflatable object, such as a tire (not shown), and a pressure gauge 170 is provided therebetween to allow the user to know the air pressure of the air storage seat 160. In short, when the piston 130 is driven to reciprocate in the cylinder 110, compressed air is continuously generated and is transmitted from the inner space of the cylinder 110 through the inner space of the cover 120, the air storage channel 123, and the air storage seat 160 to the inflatable object from the air outlet 161 to inflate the inflatable object.

As shown in FIG. 2 and FIG. 3 , the anti-return plate 180 of this embodiment is disposed between the cylinder 110 and the cover 120, and the anti-return plate 180 has a bowl-shaped profile so that the pressure column 121 of the cover 120 corresponds to the bowl inner bottom 184 of the anti-return plate 180. The anti-return plate 180 also has two annular ribs facing the cylinder 110 and coaxial with the central axis CX, and are divided into an outer annular rib 182 and an inner annular rib 181, which are respectively in contact with the partition 115 of the cylinder 110, thereby reducing the contact area between the bowl-shaped profile and the partition 115. In short, the anti-return plate 180 of this embodiment has a top surface (bowl inner bottom 184) and a bottom surface facing each other, the top surface is flat to be pressed by the pressure column 121, and the annular rib is located on the bottom surface to bear on the partition 115. Furthermore, the cylinder 110 also has a limiting ring 114 extending from the partition 115, and the bowl edge 183 of the bowl-shaped profile abuts against the inner ring wall of the limiting ring 114.

FIG5 and FIG6 are partial cross-sectional views of the air compressor structure. Please refer to FIG5 and FIG6 simultaneously. In this embodiment, since the check plate 180 covers the air hole 113 of the partition plate 115, the check plate 180 can be affected by the air flow and move between the pressure column 121 and the partition plate 115 (along the Z axis), as described below, wherein the air flow path is indicated by a dotted arrow.

As shown in FIG5 , at this time, the piston 130 performs the first stroke (process), that is, the top end of the piston 130 moves toward the partition 115 to compress the air between the piston 130 and the partition 115, and transmits the compressed air from the inner space of the cylinder 110 to the inner space of the cover 120 through the air hole 113. At this time, the compressed air can lift the check plate 180, so that the bowl bottom 184 of the check plate 180 abuts against the compression column 121, and the bowl edge 183 is also driven by the compressed air to move away from the inner ring wall of the limit ring 114 (marked in FIG4 ), so that the compressed air can smoothly flow into the inner space of the cover 120.

As shown in FIG6 , when the piston 130 performs the second stroke (return stroke), a vacuum is formed in the cylinder 110 when the top end of the piston 130 moves away from the air hole 113. At this time, the check plate 180 is driven by the vacuum and the compressed air (located in the inner space of the cover 120) to move in the negative Z-axis direction to abut against the partition 115 and cover the air hole 113, and the bowl edge 183 abuts against the inner ring wall of the limit ring 114 (marked in FIG4 ). At the same time, the top of the piston 130 that moves away from the partition 115 will also form a gap G3 with the inner wall of the cylinder 110 to allow air from the external environment to enter the cylinder 110, so as to facilitate the piston 130 to compress the air entering the cylinder 110 when performing the first stroke next time.

As shown in FIG. 2 , the air holes 113 of the present embodiment are arranged in a ring shape relative to the central axis CX, and as shown in FIG. 5 or FIG. 6 , the positive projection of the air holes 113 on the check plate 180 is located between two ring ribs (outer ring rib 182 and inner ring rib 181). This allows the bottom surface of the check plate 180 to reduce the contact area with the partition 115 through the outer ring rib 182 and the inner ring rib 181, so that the compressed air passing through the air holes 113 can smoothly lift the check plate 180. When the piston 130 performs the second stroke, the check plate 180 is lifted due to the vacuum and the compressed air of the cover body 120. 80 is pushed back by the compressed air in the cover body 120 and is blocked between the air hole 113 and the internal space of the cover body 120 by the outer annular rib 182. At the same time, the bowl edge 183 will abut against the inner annular wall of the limiting ring 114 again, and provide the required non-return function (preventing the compressed air at the cover body 120 from flowing back to the cylinder 110) with the outer annular rib 182.

Please refer to FIG. 5 and FIG. 6 again. In the air compressor structure 100 of the present embodiment, the piston 130 has an opening 131 and an air intake barrier 190. The air intake barrier 190 can be elastically deformed and covered on the opening 131 to open or close the opening 131. When the piston 130 performs the second stroke, as shown in FIG. 6, the air intake barrier 190 allows the air from the external environment to open the air intake barrier 190 due to the vacuum and enter the cylinder 110 through the opening 131. When the piston 130 performs the first stroke, as shown in FIG. 5, the air intake barrier 190 is restored and the opening 131 is closed. Here, the air intake barrier 190 is fixed to the top of the piston 130 by a fixing member 132b, and the other side that is not fixed remains free so that it can 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 stopper 132a at its top to provide a stopper function for the opened air intake barrier 190 when the piston 130 performs the second stroke, thereby preventing the air intake barrier 190 from being deformed too much and ensuring that it can be smoothly reset when the piston 130 performs the first stroke.

FIG. 7A and FIG. 7B are partial cross-sectional views of an air compressor structure according to another embodiment of the present invention. Referring to FIG. 7A and FIG. 7B, the piston 130 is in different states as shown in FIG. 5 and FIG. 6, and the anti-return plate 280 of this embodiment includes a limit ring 281, an inner ring rib 181, an outer ring rib 182, a bowl edge 183 and a recess 282, wherein the inner ring rib 181, the outer ring rib 182 and the bowl edge 183 have been described in the above embodiment and will not be described again. The limiting ring 281 extends from the inner bottom 184 of the bowl and is correspondingly and movably sleeved on the pressure column 121, so that when the anti-return plate 280 moves along the Z axis as the anti-return plate 180 mentioned above, the pressure column 121 can maintain the sleeve relationship with the limiting ring 281, so that the pressure column 121 provides a limiting effect on the anti-return plate 280 in the X-Y plane.

FIG8 is a partial cross-sectional view of an air compressor structure according to another embodiment of the present invention. Referring to FIG8 and comparing it with FIG7A or FIG7B, in this embodiment, the anti-return plate 380 includes a limit ring 381, an inner ring rib 382, an outer ring rib 383 and a bowl edge 384, and the inner ring rib 382 further forms a depression 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 edge 384 having the same functions as the aforementioned embodiment (limiting ring 281, inner ring rib 181, outer ring rib 182 and bowl edge 183), the anti-return plate 380 further improves the structural strength of the anti-return plate 380 by increasing the structural thickness, structural width and contour undulation, thereby improving the durability of the anti-return plate 380, and the formation of the recess 385 is also a means of reducing the contact area between the anti-return plate 380 and the partition 115 in response to the aforementioned increase in structural thickness and width, so that the anti-return plate 380 can still be smoothly driven by compressed air. In addition, compared to the aforementioned anti-return plate 280 which has a step difference between the bowl edge 183 and the outer annular rib 182 to form a depression 282 (the same applies to the anti-return plate 180), the annular rib (outer annular rib 383) of this embodiment is in an outwardly flush state with the bowl edge 384. Its purpose is also to allow the outer annular rib 383 to successfully complete the function of the aforementioned embodiment while effectively increasing the structural strength of the anti-return plate 380.

In summary, in the above-mentioned embodiments of the present novel invention, the air compressor structure uses a movable check plate and a pressure column of the cover body, so that the check plate can be affected by the airflow and open relative to the air hole, so as to allow compressed air to pass when opened, and seal the air hole when closed to achieve the required check function.

Specifically, 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 plate. Since the bottom surface of the check plate is provided with an annular rib, the contact area between the check plate and the partition is reduced. Therefore, the compressed air can smoothly lift the check plate and be transmitted to the internal space of the cover body. At this time, the check plate moves upward and stops at the pressure column of the cover body.

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 in the cover body, so the pressure difference between the check plate and the vacuum is caused, and the check plate is driven to return to the position where it covers and seals the air hole. The check plate uses its bowl edge to abut against the limit ring of the cylinder, and the annular ribs to abut against the partition plate, thereby keeping the compressed air in the cover body to 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, so as to be used for the next first stroke of the piston.

Accordingly, the movable check plate can be matched with the movement of the piston and the compressed air or vacuum generated by it, and move accordingly to complete the required compressed air passage or check function. Compared with the check valve of the prior art, the check plate of this case has obviously achieved the effect of simplifying the components, and at the same time overcomes the related problems faced by the check valve of the prior art.

100: Compressor structure 110: Cylinder 111: Body 112: Protrusion 113: Air hole 114: Limiting ring 115: Partition plate 120: Cover 121: Pressure column 122: Slot 123: Air storage channel 130: Piston 131: Opening 132a: Stopper 132b: Fixing part 140: Transmission mechanism 150: Motor 160: Air storage seat 161: Air outlet 170: Pressure gauge 180, 280, 380: Check plate 181, 382: Inner ring rib 182, 383: Outer ring rib 183, 384: bowl edge 184: bowl bottom 190: air intake baffle 281, 381: limit ring 282, 385: depression CX: center axis G3: gap X-Y-Z: rectangular coordinates

FIG. 1 is a schematic diagram of an air compressor structure according to an embodiment of the present invention. FIG. 2 and FIG. 3 respectively show exploded views of some components of the air compressor structure from different perspectives. FIG. 4 shows a partial cross-sectional view of the air compressor structure from a three-dimensional perspective. FIG. 5 and FIG. 6 are partial cross-sectional views of the air compressor structure, respectively. FIG. 7A and FIG. 7B are partial cross-sectional views of an air compressor structure according to another embodiment of the present invention. FIG. 8 is a partial cross-sectional view of an air compressor structure according to another embodiment of the present invention.

100: Air compressor structure

110: Cylinder

120: Cover

130: Piston

140: Transmission mechanism

150: Motor

160: Gas storage seat

161: Air outlet

170: Pressure gauge

X-Y-Z: Cartesian coordinates

Claims (9)

An air compressor structure includes: a cylinder having a plurality of air holes; a piston reciprocatingly coupled in the cylinder; a cover body assembled to the cylinder, the cover body having a pressure column, the inner space of the cylinder and the inner space of the cover body being connected to each other through the air holes; and a check plate movably arranged between the cylinder and the cover body, when the piston performs a first stroke, the piston moves close to the air holes to compress the air in the cylinder, and the compressed air passes through the air holes and lifts the check plate to flow 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 holes. The check plate is driven by the vacuum and the compressed air in the cover body to cover and seal the air holes. An air compressor structure as described in claim 1, wherein the check plate has two annular ribs facing the cylinder and coaxial with the central axis, abutting against a partition of the cylinder, and the partition has the air holes. An air compressor structure as described in claim 2, wherein the air holes are arranged in a ring shape, and the orthographic projections of the air holes on the check plate are located between the two annular ribs. An air compressor structure as described in claim 2, wherein the check 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 pressure column is suitable for abutting against the top surface. An air compressor structure as described in claim 1, wherein the check plate has a bowl-shaped profile, and the cylinder also has a partition and a limiting ring extending from the partition, the bowl edge of the bowl-shaped profile abuts against the inner ring wall of the limiting ring, the pressure column is suitable for abutting against the inner bottom of the bowl of the bowl-shaped profile, and the partition has the air holes. An air compressor structure as described in claim 5, wherein the check 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. An air compressor structure as described in claim 5, wherein the check 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. An air compressor structure as described in claim 1, wherein the check plate has a limiting ring, which is movably sleeved on the pressure column so that the pressure column limits the check plate. An air compressor structure as described in claim 1, wherein the piston has an opening and an intake baffle, and the intake baffle can be elastically deformed to cover the opening to open or close the opening. When the piston performs the second stroke, the intake baffle causes the air from the external environment to lift the intake baffle due to the vacuum and enter the cylinder through the opening. When the piston performs the first stroke, the intake baffle recovers and closes the opening.

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