A compact air compressor

Abstract

The utility model discloses a compact air compressor, including a driving mechanism, a compression mechanism and a cooling mechanism, wherein the driving mechanism includes a motor housing, a motor body arranged in the motor housing, and an output shaft connected to the motor body, wherein the output shaft is used to output rotational power; the cooling mechanism includes a connecting box, an axial flow fan located in the inner cavity of the connecting box, and an air intake assembly communicated with the connecting box, wherein the side wall of the connecting box is connected to the motor housing, the output shaft penetrates the side wall of the connecting box and is coaxially connected to the axial flow fan, and the air intake assembly is located on the side of the connecting box close to the motor housing; the compression mechanism includes a cylinder, a piston slidably arranged in the cylinder, and a connecting rod connected to the piston, wherein the cylinder is connected to the connecting box, the axial flow fan is provided with an eccentric block, the connecting rod penetrates the connecting box and is rotatably connected to the eccentric block, and the connecting rod is located on the side of the axial flow fan away from the motor body. The utility model can reduce the volume, does not occupy space, and has a lower manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compact air compressor. Background Art

[0002] Compressors are called "general machinery" because of their wide range of uses. The compressed air generated by the compressor can be used as power to drive various pneumatic machinery and pneumatic tools. The principle of the air compressor is to drive the crank-connecting rod mechanism through the motor, and the crank-connecting rod mechanism drives the piston to reciprocate in the cylinder to compress the gas. Due to the change in the pressure in the cylinder, air enters the cylinder through the intake valve. During the compression stroke, due to the reduction of the cylinder volume, the compressed air enters the air storage tank through the exhaust pipe under the action of the exhaust valve.

[0003] The piston will generate heat during the operation of the cylinder, and the outer casing of the compressor will be equipped with a fan device. The airflow generated by the fan device enters the inner cavity of the compressor and blows toward the heat-generating components such as the cylinder and cylinder head, thereby achieving a cooling effect.

[0004] However, the fan device of the existing compressor adopts an external design, and the fan blades and the fixed base of the fan device make the whole machine large in size, not compact enough, and the overall cost is high. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a compact air compressor that can reduce the volume, does not take up space, and has a lower manufacturing cost.

[0006] A compact air compressor according to the first aspect of the present invention includes a driving mechanism, a compression mechanism and a cooling mechanism, wherein the driving mechanism is used to provide power to the compression mechanism and the cooling mechanism, the compression mechanism is used to compress air, and the cooling mechanism is used to cool the fluid output by the compression mechanism; the driving mechanism includes a motor housing, a motor body arranged in the motor housing, and an output shaft connected to the motor body, and the output shaft is used to output rotational power; the cooling mechanism includes a connecting box, an axial flow fan located in the inner cavity of the connecting box, and an air intake assembly connected to the connecting box, and the connecting box The side wall of the box is connected to the motor housing, the output shaft penetrates the side wall of the connecting box and is coaxially connected to the axial flow fan, the axial flow fan is used to generate fluid, and the air intake assembly is located on the side of the connecting box close to the motor housing; the compression mechanism includes a cylinder, a piston slidably arranged in the cylinder, and a connecting rod connected to the piston, the cylinder is connected to the connecting box, the piston slides in the cylinder to generate compressed air, the axial flow fan is provided with an eccentric block, the connecting rod penetrates the connecting box and is rotatably connected to the eccentric block, and the connecting rod is located on the side of the axial flow fan away from the motor body.

[0007] A compact air compressor according to an embodiment of the utility model has at least the following beneficial effects:

[0008] The utility model integrates the motor housing and the connecting box of the air compressor into one, thereby enhancing the mechanical strength of the whole machine connection and reducing the vibration of the whole machine; the connecting box is connected to the air intake assembly, and during compression work, the stator and the rotor of the motor body cooperate to drive the eccentric block to move, so that the connecting rod drives the piston to slide in the cylinder, thereby generating compressed air, and at the same time, the cooling fan on the eccentric block generates an air flow from the air in the inner cavity of the connecting box to cool the cylinder, the connecting rod, the piston and other components, and further avoids the design of adopting an external cooling fan and a base, so that the whole structure of the air compressor is compact, the volume is reduced, and the cost of the whole machine is reduced.

[0009] According to some embodiments of the utility model, the air intake assembly includes an air intake pipe, the cylinder is provided with an air intake passage, and the air intake pipe is connected with the interior of the cylinder through the air intake passage.

[0010] According to some embodiments of the present utility model, the inner cavity of the connection box is an air compensation cavity, and the air inlet pipe is connected to the air compensation cavity.

[0011] According to some embodiments of the utility model, the air inlet of the air inlet pipe is provided with an air filter, and the air filter is used to filter the air.

[0012] According to some embodiments of the present invention, the connection box includes a box body and a sealing cover detachably connected to the box body, and the sealing cover is located on one side of the box body and is arranged in the axial direction of the output shaft.

[0013] According to some embodiments of the utility model, the eccentric block is a connecting shaft, the connecting shaft and the axial flow fan are eccentrically arranged, and the connecting rod is rotatably connected to the connecting shaft.

[0014] According to some embodiments of the present utility model, a side wall of the connection box is provided with a bearing hole and a first bearing provided in the bearing hole, and the connection box is rotatably connected to the output shaft via the first bearing.

[0015] According to some embodiments of the utility model, the connecting shaft sleeve has a second bearing, and the connecting shaft is rotatably connected to the connecting rod via the second bearing.

[0016] According to some embodiments of the utility model, the cylinder is provided with a valve plate, and the valve plate is provided with an intake valve and an exhaust valve, the intake valve is used to intake air into the inner cavity of the cylinder, and the exhaust valve is used to exhaust the inner cavity of the cylinder.

[0017] According to some embodiments of the present utility model, the compression mechanism is provided with an exhaust pipe, and the exhaust pipe discharges the compressed air in the inner cavity of the cylinder through the exhaust valve.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic structural diagram of a compact air compressor according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 A side view schematic diagram of a compact air compressor is shown;

[0022] Figure 3 for Figure 1 A schematic diagram of the AA cross-section structure of a compact air compressor is shown;

[0023] Figure 4 for Figure 1 A schematic diagram of the BB cross-sectional structure of a compact air compressor is shown.

[0024] Figure markings: 100-motor housing, 110-motor body, 120-output shaft, 130-connecting box, 140-axial flow fan, 150-cylinder, 160-piston, 170-connecting rod, 180-intake pipe, 190-intake duct, 200-air compensation chamber, 210-air filter, 220-housing, 230-sealing cover, 240-connecting shaft, 250-first bearing, 260-second bearing, 270-valve plate, 280-intake valve, 290-exhaust valve, 300-exhaust pipe. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] A compact air compressor according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0030] Reference Figure 1A compact air compressor of an embodiment of the utility model can be a V-type or H-type piston 160 air compressor, including a driving mechanism, a compression mechanism and a cooling mechanism. The driving mechanism is used to provide power to the compression mechanism and the cooling mechanism, the compression mechanism is used to compress air, and the cooling mechanism is used to cool the fluid output by the compression mechanism.

[0031] The driving mechanism includes a motor housing 100 , a motor body 110 disposed in the motor housing 100 , and an output shaft 120 connected to the motor body 110 , wherein the output shaft 120 is used to output rotational power.

[0032] It can be understood that the motor body 110 includes a stator and a rotor, the output shaft 120 is coaxially arranged with the rotor, and the stator is arranged in the motor housing 100 .

[0033] Among them, the cooling mechanism includes a connecting box 130, an axial flow fan 140 located in the inner cavity of the connecting box 130, and an air intake assembly connected to the connecting box 130. The side wall of the connecting box 130 is connected to the motor housing 100. The output shaft 120 passes through the side wall of the connecting box 130 and is coaxially connected to the axial flow fan 140. The axial flow fan 140 is used to generate fluid, and the air intake assembly is located on the side of the connecting box 130 close to the motor housing 100.

[0034] Among them, the compression mechanism includes a cylinder 150, a piston 160 slidably arranged in the cylinder 150, and a connecting rod 170 connected to the piston 160. The cylinder 150 is connected to the connecting box 130. The piston 160 slides in the cylinder 150 to generate compressed air. The axial flow fan 140 is provided with an eccentric block. The connecting rod 170 passes through the connecting box 130 and is rotatably connected to the eccentric block. The connecting rod 170 is located on the side of the axial flow fan 140 away from the motor body 110.

[0035] In some embodiments of the present invention, referring to Figure 2 , 3 and Figure 4 The air intake assembly includes an air intake pipe 180, and the cylinder 150 is provided with an air intake passage 190. The air intake pipe 180 is connected to the interior of the cylinder 150 through the air intake passage 190. Therefore, external air enters the interior of the cylinder 150 through the air intake pipe 180, so that the piston 160 can compress the air.

[0036] In some embodiments of the present invention, referring to Figure 4 The inner cavity of the connecting box 130 is the air compensation cavity 200, and the air intake pipe 180 is connected to the air compensation cavity 200. Therefore, during the rotation of the axial flow fan 140, air enters the air compensation cavity 200 from the air intake pipe 180, and the air compensation cavity 200 generates airflow, so that the airflow cools down the cylinder 150, the piston 160 and other components.

[0037] In some embodiments of the utility model, an air filter 210 is provided at the air inlet of the air inlet pipe 180 , and the air filter 210 is used to filter the air, thereby reducing impurities and debris in the air and reducing foreign matter from entering the cylinder 150 .

[0038] In some embodiments of the present invention, the connection box 130 includes a box body 220 and a sealing cover 230 detachably connected to the box body 220 . The sealing cover 230 is located on one side of the box body 220 and is arranged in the axial direction of the output shaft 120 .

[0039] Therefore, when the compressor is installed, the housing 220 can be connected to the motor housing 100 by bolts, and then the axial fan 140, connecting rod 170 and other components can be installed on the output shaft 120, and finally the sealing cover 230 can be connected to the housing 220, thereby greatly reducing the difficulty of installation.

[0040] In some embodiments of the present invention, a bearing hole and a first bearing 250 disposed in the bearing hole are disposed on the side wall of the connection box 130 , and the connection box 130 is rotatably connected to the output shaft 120 via the first bearing 250 .

[0041] Therefore, installing the first bearing 250 on the bearing hole and matching the output shaft 120 with the inner ring of the first bearing 250 is beneficial to reducing the friction between the output shaft 120 and the connection box 130 and improving the service life.

[0042] In some embodiments of the present invention, the eccentric block is a connecting shaft 240 , the connecting shaft 240 and the axial flow fan 140 are eccentrically arranged, and the connecting rod 170 is rotatably connected to the connecting shaft 240 .

[0043] Specifically, the connecting shaft 240 is sleeved with a second bearing 260 , and the connecting shaft 240 is rotatably connected to the connecting rod 170 via the second bearing 260 .

[0044] Therefore, the connecting shaft 240 and the connecting rod 170 are connected via the second bearing 260, which is beneficial to reducing the wear of the eccentric block and increasing the service life.

[0045] In some embodiments of the present invention, the cylinder 150 is provided with a valve plate 270 , and the valve plate 270 is provided with an intake valve 280 and an exhaust valve 290 . The intake valve 280 is used to intake air into the inner cavity of the cylinder 150 , and the exhaust valve 290 is used to exhaust the inner cavity of the cylinder 150 .

[0046] It should be noted that the intake valve 280 and the exhaust valve 290 are respectively a one-way intake valve 280 and a one-way exhaust valve 290 , so that the air in the intake pipe 180 can enter the cylinder 150 through the one-way exhaust valve 290 , and the compressed air in the cylinder 150 is discharged through the one-way exhaust valve 290 .

[0047] In some embodiments of the present invention, referring to Figure 1 The compression mechanism is provided with an exhaust pipe 300, and the exhaust pipe 300 discharges the compressed air in the inner cavity of the cylinder 150 through the exhaust valve 290. Therefore, the exhaust pipe 300 can transport the compressed air discharged by the one-way exhaust valve 290 to the storage tank.

[0048] Therefore, this embodiment has the following effects:

[0049] The motor housing 100 and the connecting box 130 of the air compressor are integrated into one, which enhances the mechanical strength of the whole machine connection and reduces the vibration of the whole machine; the connecting box 130 is connected to the air intake assembly. During compression operation, the stator and rotor of the motor body 110 cooperate with each other, and the output shaft drives the eccentric block to move, so that the connecting rod 170 drives the piston 160 to slide in the cylinder 150, thereby generating compressed air. At the same time, the air flow generated by the air driven by the cooling fan on the eccentric block from the inner cavity of the connecting box 130 can cool the cylinder 150, the connecting rod 170, the piston 160 and other components. Furthermore, the design of using an external cooling fan and a base is avoided, so that the air compressor has a compact structure, a reduced volume, and a reduced cost.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A compact air compressor, characterized in that It includes a driving mechanism, a compression mechanism and a cooling mechanism, wherein the driving mechanism is used to provide power to the compression mechanism and the cooling mechanism, the compression mechanism is used to compress air, and the cooling mechanism is used to cool the fluid output by the compression mechanism: The driving mechanism comprises a motor housing (100), a motor body (110) disposed in the motor housing (100), and an output shaft (120) connected to the motor body (110), wherein the output shaft (120) is used to output rotational power; The cooling mechanism comprises a connection box (130), an axial flow fan (140) located in the inner cavity of the connection box (130), and an air intake assembly communicated with the connection box (130); the side wall of the connection box (130) is connected to the motor housing (100); the output shaft (120) penetrates the side wall of the connection box (130) and is coaxially connected to the axial flow fan (140); the axial flow fan (140) is used to generate fluid; and the air intake assembly is located on a side of the connection box (130) close to the motor housing (100); The compression mechanism comprises a cylinder (150), a piston (160) slidably disposed in the cylinder (150), and a connecting rod (170) connected to the piston (160); the cylinder (150) is connected to the connecting box (130); the piston (160) slides in the cylinder (150) to generate compressed air; the axial flow fan (140) is provided with an eccentric block; the connecting rod (170) penetrates the connecting box (130) and is rotatably connected to the eccentric block; and the connecting rod (170) is located on a side of the axial flow fan (140) away from the motor body (110).

2. A compact air compressor according to claim 1, characterized in that: The air intake assembly comprises an air intake pipe (180), the cylinder barrel (150) is provided with an air intake passage (190), and the air intake pipe (180) is communicated with the interior of the cylinder barrel (150) through the air intake passage (190).

3. A compact air compressor according to claim 2, characterized in that: The inner cavity of the connection box (130) is an air compensation cavity (200), and the air intake pipe (180) is in communication with the air compensation cavity (200).

4. A compact air compressor according to claim 2, characterized in that: An air filter (210) is provided at the air inlet of the air inlet pipe (180), and the air filter (210) is used to filter air.

5. A compact air compressor according to claim 1, characterized in that: The connection box (130) comprises a box body (220) and a sealing cover (230) detachably connected to the box body (220); the sealing cover (230) is located on one side of the box body (220) and is arranged in the axial direction of the output shaft (120).

6. A compact air compressor according to claim 1, characterized in that: A bearing hole and a first bearing (250) are provided on the side wall of the connection box (130), and the connection box (130) is rotatably connected to the output shaft (120) via the first bearing (250).

7. A compact air compressor according to claim 1, characterized in that: The eccentric block is a connecting shaft (240), the connecting shaft (240) and the axial flow fan (140) are eccentrically arranged, and the connecting rod (170) is rotatably connected to the connecting shaft (240).

8. A compact air compressor according to claim 7, characterized in that: The connecting shaft (240) is sleeved with a second bearing (260), and the connecting shaft (240) is rotatably connected to the connecting rod (170) via the second bearing (260).

9. A compact air compressor according to claim 1, characterized in that: The cylinder barrel (150) is provided with a valve plate (270), and the valve plate (270) is provided with an intake valve (280) and an exhaust valve (290), wherein the intake valve (280) is used to intake air into the inner cavity of the cylinder barrel (150), and the exhaust valve (290) is used to exhaust air from the inner cavity of the cylinder barrel (150).

10. A compact air compressor according to claim 9, characterized in that The compression mechanism is provided with an exhaust pipe (300), and the exhaust pipe (300) discharges the compressed air in the inner cavity of the cylinder (150) through the exhaust valve (290).

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