Oil-free reciprocating air compressor

Abstract

The utility model relates to the field of air compressors, in particular to an oil-free reciprocating air compressor which comprises an air storage mechanism, a driving mechanism and a crankcase, the driving mechanism is detachably mounted on the upper portion of the air storage mechanism and connected with the crankcase, at least one air cylinder is arranged on the outer side of the crankcase, and the air cylinders communicate with the air storage mechanism through exhaust pipes; wherein the gas storage mechanism is arranged at the bottom of the driving mechanism and supports the driving mechanism, a first support is arranged at the bottom of the gas storage mechanism, and the first support is used for supporting the gas storage mechanism. The air storage mechanism serves as a supporting leg of the driving mechanism, so that the air storage mechanism, the driving mechanism and the crankcase are arranged more densely, the space utilization rate is high, the size of a pipeline between the air cylinder and the air storage mechanism is greatly reduced, and the pipeline cost is reduced; due to the fact that the air storage mechanism lifts the driving mechanism, a settable space is conveniently formed below the middle of the crankcase, the settable number of the air cylinders is increased, and the setting flexibility is better.

Description

Technical Field

[0001] This application relates to the field of air compressors, and specifically to an oil-free reciprocating air compressor. Background Technology

[0002] Oil-free air compressors are miniature reciprocating compressors with a single-shaft motor driving a symmetrically distributed crank-rocker mechanical structure. The main moving pair is a piston ring, and the secondary moving pair is an aluminum alloy cylindrical surface. The moving pairs are self-lubricated by the piston ring without the addition of any lubricant.

[0003] The compressor causes the volume of the cylindrical cylinder to change periodically through the reciprocating motion of the crankshaft and rocker arm. With each revolution of the motor, the cylinder volume changes in opposite directions twice. When the positive direction is the expansion direction of the cylinder volume, the cylinder volume is a vacuum, atmospheric pressure is greater than the internal pressure, and air enters the cylinder through the intake valve—this is the intake process. When the negative direction is the contraction direction of the volume, the gas entering the cylinder is compressed, and the internal pressure increases rapidly. When it exceeds atmospheric pressure, the exhaust valve opens—this is the exhaust process.

[0004] It is known that most existing air storage mechanisms are external, and the number of cylinders is limited by the arrangement of the drive mechanism and crankcase. This results in a large overall size of the air compressor, a small number of cylinders that can be installed, low utilization of the intake space, and large pipeline size with high cost. Utility Model Content

[0005] To solve, or at least partially solve, the above-mentioned technical problems, this application provides an oil-free reciprocating air compressor, comprising:

[0006] The system includes an air storage mechanism, a drive mechanism, and a crankcase. The drive mechanism is detachably mounted on the upper part of the air storage mechanism and connected to the crankcase. At least one cylinder is located on the outside of the crankcase, and the cylinder is connected to the air storage mechanism via an exhaust pipe.

[0007] The gas storage mechanism is located at the bottom of the drive mechanism and supports the drive mechanism. A first support is provided at the bottom of the gas storage mechanism for supporting the gas storage mechanism.

[0008] Optionally, a second support is provided at the bottom of the crankcase, and the first support and the second support cooperate to support the gas storage mechanism and the crankcase.

[0009] Optionally, the drive mechanism is provided with mounting plates on opposite sides, and the mounting plates are connected to the gas storage mechanism through threaded connectors.

[0010] Optionally, the number of cylinders is at least two, and the at least two cylinders are evenly distributed around the circumference of the crankcase.

[0011] Optionally, at least one of the at least two cylinders is provided with a filter canister on one side, the filter canister filters the incoming gas before it flows into the cylinder, and the gas compressed by the cylinder flows into the gas storage mechanism.

[0012] Optionally, the crankcase is provided with a collection tank, and at least one of the two cylinders is in communication with the collection tank.

[0013] Optionally, the collection tank is annular and located at the end of the crankcase opposite to the drive mechanism.

[0014] Optionally, the collection tank is integrated with the crankcase;

[0015] A fan is provided on one side of the crankcase. External airflow is drawn in by the fan, enters the collection tank, and flows through the collection tank to the corresponding cylinder.

[0016] Optionally, the number of cylinders is at least three, and the bottom space of the crankcase is at least larger than the volume of one of the cylinders.

[0017] Optionally, the length of the gas storage mechanism is at least greater than the length of the drive mechanism and the crankcase.

[0018] The oil-free reciprocating air compressor provided in this application has an air storage mechanism located at the bottom of the drive mechanism and supporting the drive mechanism. The air storage mechanism serves as a support foot for the drive mechanism, making the arrangement of the air storage mechanism, drive mechanism, and crankcase more compact and space utilization more efficient. Moreover, due to the overall compact arrangement, the pipe size between the cylinder and the air storage mechanism is also significantly reduced, thus lowering pipe costs.

[0019] Because the gas storage mechanism raises the drive mechanism, there is space available in the lower middle part of the crankcase, which increases the number of cylinders that can be installed and provides greater flexibility in installation. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0021] Figure 1 This is a schematic diagram of the main structure of the oil-free reciprocating air compressor of this application;

[0022] Figure 2 for Figure 1 Axonometric schematic diagram of an oil-free reciprocating air compressor at one angle;

[0023] Figure 3for Figure 1 Axonometric view of a medium-oil-free reciprocating air compressor from another angle;

[0024] Figure 4 for Figure 1 Axonometric view of a medium-oil-free reciprocating air compressor from another angle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Gas storage mechanism; 110. First support; 120. Exhaust pipe;

[0027] 20. Drive mechanism; 210. Mounting plate;

[0028] 30. Crankcase; 310. Cylinder; 320. Second support; 330. Filter canister; 340. Collection canister; 350. Fan. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0032] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] Please refer to Figures 1 to 4 This embodiment provides an oil-free reciprocating air compressor, which includes an air storage mechanism 10, a drive mechanism 20, and a crankcase 30. The drive mechanism 20 is detachably installed on the upper part of the air storage mechanism 10 and connected to the crankcase 30. At least one cylinder 310 is provided on the outside of the crankcase 30, and the cylinder 310 is connected to the air storage mechanism 10 through an exhaust pipe 120. The bottom of the air storage mechanism 10 is provided with a first support 110, which is used to support the air storage mechanism 10 and the drive mechanism 20.

[0034] It should be noted that placing the traditional external air storage mechanism 10 below the drive mechanism 20 as a support for the drive mechanism 20 allows for a tighter arrangement of the air storage mechanism 10, drive mechanism 20, and crankcase 30, reducing the overall size of the air compressor. Furthermore, due to the reduced size of the air compressor, the distance between the cylinder 310 and the air storage mechanism 10 is significantly reduced, consequently decreasing the length of the exhaust pipe 120 between the cylinder 310 and the air storage mechanism 10, thus lowering piping costs.

[0035] Because the air storage mechanism 10 raises the drive mechanism 20, a cylinder 310 can also be installed in the lower middle part of the crankcase 30, increasing the number of cylinders 310 that can be installed and further improving the space utilization of the air compressor.

[0036] Specifically, a second support 320 is provided at the bottom of the crankcase 30, and the first support 110 and the second support 320 cooperate to support the gas storage mechanism 10 and the crankcase 30.

[0037] That is, a second support 320 is provided at the bottom of the crankcase 30. The second support 320 is used to support the crankcase 30, and at the same time, together with the first support 110, it also supports the drive mechanism 20, thereby improving the overall support stability of the air compressor.

[0038] It can be seen that the first support 110 can be divided into two support parts. The two support parts are arranged on opposite sides of the gas storage mechanism 10 along the length extension direction of the gas storage mechanism 10, which is conducive to improving the support stability of the gas storage mechanism 10.

[0039] Please continue to refer to Figure 1 and Figure 2 The drive mechanism 20 has mounting plates 210 on both sides, and the mounting plates 210 are connected to the gas storage mechanism 10 through threaded connectors.

[0040] It can be seen that the middle part of the drive mechanism 20 abuts against the top surface of the gas storage mechanism 10, and a mounting plate 210 is provided on each of the opposite sides of the drive mechanism 20. The mounting plate 210 is connected to the gas storage mechanism 10 through a threaded connector.

[0041] It can be seen that the number of threaded connectors can be one, two or more, and there is no limit here. Different numbers of threaded connectors can be set to connect with the gas storage mechanism 10 according to actual needs.

[0042] Threaded fasteners can be bolts or screws, and the specific structural form is not limited here.

[0043] Please refer to Figure 3 and Figure 4 The number of cylinders 310 is at least two, and the at least two cylinders 310 are evenly distributed around the crankcase 30 in a circumferential manner.

[0044] The number of cylinders 310 can be two, three, or more, etc., and is not limited here.

[0045] The side of cylinder 310 closest to the gas storage mechanism 10 can be connected to the gas storage mechanism 10 via the exhaust pipe 120. This shortens the length of the exhaust pipe 120 and reduces its usage length, thereby reducing costs.

[0046] Furthermore, a filter canister 330 is provided on one side of at least one of the at least two cylinders 310.

[0047] You can refer to Figure 2 and Figure 4 That is, a filter canister 330 is provided on one side of some cylinders 310. The internal space of the filter canister 330 is larger than that of the pipeline. Therefore, the pressure drops after the air enters the filter canister 330, so that the water in the air remains in the filter canister 330 and does not enter the cylinder 310, thus ensuring the operational stability of the cylinder 310.

[0048] In some other embodiments, a collection tank 340 is provided on the crankcase 30, and one of the at least two cylinders 310 is in communication with the collection tank 340.

[0049] Specifically, the collection tank 340 is annular and located at the end of the crankcase 30 away from the drive mechanism 20.

[0050] That is, the collection tank 340 is located on the side of the cylinder 310 away from the drive mechanism 20, which can shorten the length of the pipeline and save the cost of pipeline installation.

[0051] Furthermore, the collection tank 340 is integrated with the crankcase 30, and a fan 350 is provided on one side of the crankcase 30. External airflow is drawn in by the fan 350 and enters the collection tank 340, and then flows through the collection tank 340 to the corresponding cylinder 310.

[0052] In other words, integrating the collection tank 340 with the crankcase 30 can increase the production cost of the crankcase 30. Furthermore, the ring-shaped collection tank 340 is arranged around the circumference of the end of the crankcase 30, which can save the arrangement space of the collection tank 340 and make the overall space utilization of the air compressor higher.

[0053] In one embodiment, the number of cylinders 310 is at least three, and the bottom space of the crankcase 30 is at least larger than the volume of one cylinder 310.

[0054] The bottom of the traditional crankcase 30 is very close to the ground, or it is directly attached to the base plate. As a result, there is no space at the bottom of the crankcase 30 to install the cylinder 310. The cylinder 310 can only be installed on the sides and top of the crankcase 30, which limits the number of cylinders that can be installed.

[0055] In this embodiment, such as Figure 1 and Figure 2 As shown, the gas storage mechanism 10 is set at the bottom of the drive mechanism 20. The first support 110 and the second support 320 together expand the bottom space of the crankcase 30 and the drive mechanism 20, raising the distance between the middle of the crankcase 30 and the ground. In this way, a number of cylinders 310 can be set below the middle of the crankcase 30, thereby increasing the number of cylinders 310 that can be set and the flexibility of setting cylinders 310.

[0056] In one embodiment, the length of the gas storage mechanism 10 is at least greater than the lengths of the drive mechanism 20 and the crankcase 30.

[0057] In this way, without increasing the circumferential dimensions of the air compressor, it is beneficial to increase the storage volume of the air storage mechanism 10, so that the air storage mechanism 10 can be used to meet the needs of large air storage capacity.

[0058] The following explanation uses six cylinders 310 as an example. Two of the cylinders 310 have filter canisters 330 on one side, and the other four are connected to the collection canister 340. In this way, the space utilization of the compressor can be further improved within a limited space, which is conducive to the miniaturization design of the air compressor.

[0059] It should be noted that the air compressor in this application includes two air circuits:

[0060] The first air path is as follows: air enters from the fan 350, flows to the collection tank 340, and then flows through the collection tank 340 to different cylinders 310 for compression. The compressed gas flows through the exhaust pipe 120 to the air storage mechanism 10.

[0061] The second air path is as follows: air enters through the filter canister 330, flows to the corresponding cylinder 310 for compression, and the compressed gas flows through the exhaust pipe 120 to the air storage mechanism 10.

[0062] Furthermore, the gas storage mechanism 10 can be divided into upper and lower layers, serving as a high-pressure gas storage tank and a low-pressure gas storage tank respectively. The high-pressure gas storage tank and the low-pressure gas storage tank are separated by a partition, and the two tanks are not connected to each other. The exhaust pipe 120 of the cylinder 310 can be selectively connected to the high-pressure gas storage tank or the low-pressure gas storage tank to meet the diverse needs of cylinder air pressure. The specific structure of the gas storage mechanism 10 is not limited here.

[0063] The gas storage mechanism 10 is equipped with multiple air inlets and outlets. The air inlets are connected to the exhaust pipe 120 to receive gas from the cylinder 310, and the exhaust ports can be connected to the gas-consuming end via pipelines. The multiple air inlets and outlets can be selectively connected according to actual needs.

[0064] In summary, using the gas storage mechanism 10 as the support foot of the drive mechanism 20 makes the arrangement of the gas storage mechanism 10, drive mechanism 20 and crankcase 30 more compact, resulting in high space utilization. Moreover, due to the overall compact arrangement, the pipe size between cylinder 310 and gas storage mechanism 10 is also greatly reduced, thus lowering pipe costs.

[0065] Because the gas storage mechanism 10 raises the drive mechanism 20, there is space available in the lower middle part of the crankcase 30, which allows for the installation of more cylinders 310 and improves the flexibility of cylinder installation.

[0066] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oil-free reciprocating air compressor, characterized in that, include: The system comprises an air storage mechanism (10), a drive mechanism (20), and a crankcase (30). The drive mechanism (20) is detachably mounted on the upper part of the air storage mechanism (10) and connected to the crankcase (30). At least one cylinder (310) is provided on the outside of the crankcase (30), and the cylinder (310) is connected to the air storage mechanism (10) through an exhaust pipe (120). The gas storage mechanism (10) is located at the bottom of the drive mechanism (20) and supports the drive mechanism (20). A first support (110) is provided at the bottom of the gas storage mechanism (10), and the first support (110) is used to support the gas storage mechanism (10).

2. The oil-free reciprocating air compressor according to claim 1, characterized in that, The crankcase (30) is provided with a second support (320) at the bottom. The first support (110) and the second support (320) cooperate to support the gas storage mechanism (10) and the crankcase (30).

3. The oil-free reciprocating air compressor according to claim 1, characterized in that, The drive mechanism (20) has mounting plates (210) on both sides, and the mounting plates (210) are connected to the gas storage mechanism (10) through threaded connectors.

4. The oil-free reciprocating air compressor according to claim 1, characterized in that, The number of cylinders (310) is at least two, and the at least two cylinders (310) are evenly distributed around the crankcase (30) in a circumferential direction.

5. The oil-free reciprocating air compressor according to claim 4, characterized in that, At least one of the at least two cylinders (310) is provided with a filter canister (330) on one side. The filter canister (330) filters the incoming gas and then flows it to the cylinder (310). The gas compressed by the cylinder (310) flows to the gas storage mechanism (10).

6. The oil-free reciprocating air compressor according to claim 5, characterized in that, The crankcase (30) is provided with a collection tank (340), and at least one of the two cylinders (310) is in communication with the collection tank (340).

7. The oil-free reciprocating air compressor according to claim 6, characterized in that, The collection tank (340) is annular and is located at the end of the crankcase (30) away from the drive mechanism (20).

8. The oil-free reciprocating air compressor according to claim 7, characterized in that, The collection tank (340) is integrally formed with the crankcase (30); A fan (350) is provided on one side of the crankcase (30). External airflow is drawn in by the fan (350) and enters the collection tank (340), and then flows through the collection tank (340) to the corresponding cylinder (310).

9. The oil-free reciprocating air compressor according to claim 1, characterized in that, The number of cylinders (310) is at least three, and the bottom space of the crankcase (30) is at least greater than the volume of one of the cylinders (310).

10. The oil-free reciprocating air compressor according to claim 1, characterized in that, The length of the gas storage mechanism (10) is at least greater than the length of the drive mechanism (20) and the crankcase (30).

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