Oil-free silent air compressor

Abstract

The utility model relates to the technical field of air compressors, and discloses an oil-free silent air compressor which comprises an air compressor shell, a transmission shaft is transversely arranged in the air compressor shell, one side of the transmission shaft can be connected with an external transmission mechanism so as to drive the transmission shaft to rotate, an eccentric wheel is fixedly sleeved on the transmission shaft, and the eccentric wheel is fixedly sleeved on the transmission shaft. An air assembly is arranged on the air compressor shell, one side of the air assembly communicates with an air inlet pipe, the other side of the air assembly communicates with an air outlet pipe, the air inlet pipe communicates with an air pump, a piston is arranged over the eccentric wheel, a movable groove is formed in the lower surface of the air assembly, the movable groove communicates with the air inlet pipe and the air outlet pipe, and the piston slides in the movable groove in an attached mode. And the bottom of the piston makes contact with the eccentric wheel, a heat dissipation mechanism is arranged at the top of the piston and can cool the interior of the air assembly, and the problem that the heat dissipation effect is reduced due to the fact that a box is arranged in an existing device for noise reduction is solved.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, specifically to an oil-free silent air compressor. Background Technology

[0002] Oil-free silent air compressors are a type of miniature reciprocating compressor. When the motor drives the compressor crankshaft to rotate, the piston, which is self-lubricating and requires no additional lubricant, reciprocates through the connecting rod. The working volume formed by the cylinder wall, cylinder head, and piston top surface changes periodically. To prevent noise pollution, existing oil-free silent air compressors employ measures such as installing silencers at the inlet and outlet, connecting the intake pipe to a sound-absorbing tunnel, and constructing a soundproof enclosure on the outside of the compressor. However, when using a soundproof enclosure for noise reduction, vibration noise is the largest source of noise.

[0003] Chinese utility model patent CN211116484U discloses an oil-free silent air compressor for vehicles, including a housing with a cover plate hinged to one end. An oil-free air compressor is fixedly connected to the bottom wall of the housing. The air inlet and outlet pipes of the oil-free air compressor pass through the housing. An air outlet pipe, which is curved, is connected to one side of the housing. Sound-absorbing cotton is fixedly adhered to the inner wall of the air outlet pipe. A through-pipe is connected to the middle of the cover plate, and a circular support plate is fixedly connected to the inner wall of the through-pipe. Multiple through holes are evenly spaced on the support plate, and sound-absorbing sponge is placed on the support plate. A dustproof mechanism is provided at the upper end of the through-pipe. A cooling fan is fixedly connected to the middle of the cover plate, located directly below the through-pipe. This utility model effectively prevents noise from escaping through the ventilation openings, enhancing its quiet operation.

[0004] During use, the device uses a cooling fan to cool down the interior. Although sound-absorbing foam is installed at the ventilation holes of the cooling fan to provide sound insulation, it also greatly reduces the cooling effect of the cooling fan on the interior, resulting in certain drawbacks in both cooling and sound insulation. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an oil-free silent air compressor that has the advantages of noise reduction while also providing heat dissipation, thus solving the problem that existing equipment with a housing for noise reduction suffers from reduced heat dissipation.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an oil-free silent air compressor, comprising an air compressor housing, a drive shaft horizontally extending through the interior of the air compressor housing, a gear fixedly connected to one side of the drive shaft, the gear meshing with an external transmission mechanism to drive the rotation of the drive shaft, an eccentric wheel fixedly mounted on the drive shaft, an air assembly fixedly mounted on the air compressor housing, an air inlet pipe connected to one side of the air assembly, and an air outlet pipe connected to the other side, the air inlet pipe connected to an air pump, a piston positioned directly above the eccentric wheel, a movable groove formed on the lower surface of the air assembly, the movable groove connecting the air inlet pipe and the air outlet pipe respectively, the piston sliding within the movable groove, and the bottom of the piston contacting the eccentric wheel, a heat dissipation mechanism positioned on the top of the piston, the heat dissipation mechanism capable of cooling the interior of the air assembly.

[0009] Preferably, the heat dissipation mechanism includes:

[0010] An installation slot is provided at the top of the piston;

[0011] A limiting bracket is fixedly installed inside the mounting slot;

[0012] The needle roller is rotatably fitted onto the inner wall of the limiting frame;

[0013] A limiting block is disposed inside the limiting frame and below the needle roller;

[0014] A rotating shaft is fixedly disposed above the limiting block, and the upper surface of the rotating shaft is set to extend beyond the upper surface of the piston.

[0015] Multiple guide vanes are fixedly mounted on the rotating shaft, and the guide vanes are spiral blades.

[0016] Preferably, an oil reservoir is provided on the piston below the mounting groove. The oil reservoir is connected to the mounting groove through an oil inlet. An oil outlet is provided on the side wall of the oil reservoir to release the lubricating oil inside the oil reservoir to the inner wall between the piston and the movable groove for lubrication.

[0017] Preferably, an annular groove is formed on the inner wall of the movable groove, and the width of the annular groove is greater than the width of the oil outlet.

[0018] Preferably, a fixing rod is fixedly connected to the lower surface of the limiting block, and an arc-shaped plate is fixedly connected to the fixing rod. The fixing rod and the arc-shaped plate are disposed inside the oil storage tank.

[0019] Preferably, the air inlet pipe and the air outlet pipe are both fixed to the air assembly by means of threaded connection. The air assembly is provided with a one-way valve plate, which is located at the connection between the air inlet pipe and the air outlet pipe and the movable groove, respectively, to realize the one-way flow of gas.

[0020] Preferably, the two ends of the drive shaft are limited to the inside of the air compressor housing by bearings.

[0021] Preferably, a limiting plate is fixedly provided below the piston, and a spring is fixedly connected above the limiting plate. The top of the spring is fixedly connected to the inner wall of the upper top surface of the air compressor housing, and the spring is fitted around the periphery of the limiting frame.

[0022] Preferably, the contact area between the eccentric wheel and the piston is provided with a wear-resistant layer, which is made of ceramic composite material to improve the wear resistance of the contact area between the eccentric wheel and the piston and extend its service life.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, this utility model provides an oil-free silent air compressor, which has the following beneficial effects:

[0025] 1. This oil-free silent air compressor utilizes a heat dissipation mechanism on the piston top, comprising a mounting groove, a limit bracket, needle rollers, a limit block, a rotating shaft, and guide vanes. When the piston moves, the continuous airflow from the intake pipe drives the rotating shaft and guide vanes to rotate, achieving active heat dissipation of the air assembly's internal components. The spiral guide vanes, during rotation, accelerate airflow, quickly removing heat generated during gas compression, preventing a decrease in gas compression efficiency and performance degradation due to high temperatures. This effectively reduces the internal temperature of the air assembly, ensuring the air compressor maintains high efficiency and stable operation even during prolonged use, thus improving the equipment's continuous working capacity and reliability.

[0026] 2. This oil-free silent air compressor features an oil reservoir connected to the piston's top mounting groove via an oil inlet. The oil reservoir has a through-hole on its outer wall. A fixing rod is fixedly connected to the bottom of the limiting block of the heat dissipation mechanism, and an arc-shaped plate is mounted on the fixing rod. An annular groove is also formed on the inner wall of the air compressor's movable groove. Only when the piston drives the oil outlet to a position flush with the annular groove will the rotating arc-shaped plate throw the lubricating oil from the oil reservoir from the oil inlet into the annular groove, thus intermittently replenishing the lubricating oil. This achieves automatic lubrication of the contact surface between the piston and the movable groove, reducing frictional resistance during piston movement, lowering operating noise, preventing wear caused by friction, and extending the service life of the piston and the movable groove. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 This is a front view isometric sectional view of the structure of this utility model.

[0029] Figure 3 This is a schematic diagram of the right isometric cross-section of the structure of this utility model.

[0030] Figure 4 This is a schematic diagram of the air assembly structure of this utility model.

[0031] Figure 5 This is an isometric sectional view of the air assembly structure of this utility model.

[0032] Figure 6 This is an isometric cross-sectional view of the air assembly structure of this utility model from another angle.

[0033] In the diagram: 100, air compressor housing; 110, gear; 120, drive shaft; 130, bearing; 140, eccentric wheel; 150, piston; 151, mounting groove; 152, limit bracket; 153, needle roller; 154, limit block; 155, rotating shaft; 156, guide vane; 160, spring; 170, oil reservoir; 171, oil outlet; 172, oil inlet; 180, fixing rod; 181, arc plate;

[0034] 200, Air assembly; 210, Inlet pipe; 220, Outlet pipe; 230, Movable groove; 240, Annular groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing 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 this utility model.

[0037] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Example

[0039] This embodiment provides an oil-free silent air compressor with the following technical features.

[0040] Please see Figure 1-6 An oil-free silent air compressor includes an air compressor housing 100. A drive shaft 120 is transversely arranged inside the air compressor housing 100. A gear 110 is fixedly connected to one side of the drive shaft 120. The gear 110 can mesh with an external transmission mechanism to drive the rotation of the drive shaft 120. An eccentric wheel 140 is fixedly mounted on the drive shaft 120. An air assembly 200 is fixedly mounted on the air compressor housing 100. One side of the air assembly 200 is connected to an air intake pipe 210, and the other side is connected to... An air outlet pipe 220 is provided, and an air inlet pipe 210 is connected to an air pump. A piston 150 is positioned directly above the eccentric wheel 140. A movable groove 230 is provided on the lower surface of the air assembly 200. The movable groove 230 is connected to the air inlet pipe 210 and the air outlet pipe 220 respectively. The piston 150 slides inside the movable groove 230, and the bottom of the piston 150 is in contact with the eccentric wheel 140. A heat dissipation mechanism is provided on the top of the piston 150, which can cool the interior of the air assembly 200.

[0041] Further, the heat dissipation mechanism includes:

[0042] Mounting slot 151 is provided on the top of piston 150;

[0043] The limiting bracket 152 is fixedly installed inside the mounting slot 151;

[0044] The needle roller 153 is rotatably fitted onto the inner wall of the limiting frame 152;

[0045] The limiting block 154 is located inside the limiting frame 152 and below the needle roller 153;

[0046] The rotating shaft 155 is fixedly installed above the limiting block 154, and the upper surface of the rotating shaft 155 is set to exceed the height of the upper surface of the piston 150.

[0047] Multiple guide vanes 156 are fixedly mounted on the rotating shaft 155, and the guide vanes 156 are spiral blades.

[0048] Furthermore, an oil reservoir 170 is provided on the piston 150 below the mounting groove 151. The oil reservoir 170 is connected to the mounting groove 151 through an oil inlet 172. An oil outlet 171 is provided on the side wall of the oil reservoir 170 to release the lubricating oil inside the oil reservoir 170 to the inner wall between the piston 150 and the movable groove 230 for lubrication.

[0049] Furthermore, an annular groove 240 is provided on the inner wall of the movable groove 230, and the width of the annular groove 240 is greater than the width of the oil outlet 171.

[0050] Furthermore, a fixing rod 180 is fixedly connected to the lower surface of the limiting block 154, and an arc-shaped plate 181 is fixedly connected to the fixing rod 180. The fixing rod 180 and the arc-shaped plate 181 are located inside the oil storage tank 170.

[0051] Furthermore, the air inlet pipe 210 and the air outlet pipe 220 are both fixed to the air assembly 200 by threaded connection. The air assembly 200 is equipped with a one-way valve plate, which is located at the connection between the air inlet pipe 210 and the air outlet pipe 220 and the movable groove 230, respectively, to realize the one-way flow of gas.

[0052] It should be noted that the threshold value of the one-way valve can be set by an external controller.

[0053] Furthermore, the two ends of the drive shaft 120 are confined inside the air compressor housing 100 by bearings 130.

[0054] Furthermore, a limiting plate is fixedly installed below the piston 150, and a spring 160 is fixedly connected above the limiting plate. The top of the spring 160 is fixedly connected to the inner wall of the upper surface of the air compressor housing 100, and the spring 160 is fitted around the limiting frame 152.

[0055] Furthermore, a wear-resistant layer is provided at the contact area between the eccentric wheel 140 and the piston 150. The wear-resistant layer is made of ceramic composite material and is used to improve the wear resistance of the contact area between the eccentric wheel 140 and the piston 150 and extend its service life.

[0056] Working principle: A drive shaft 120 is horizontally arranged inside the air compressor housing 100. Both sides of the drive shaft 120 are fitted inside bearings 130, and one end of the drive shaft 120 is connected to a transmission mechanism via a gear 110. By controlling the transmission mechanism, the gear 110 and drive shaft 120 can be driven to rotate. An eccentric wheel 140 is fixedly arranged in the middle of the drive shaft 120 by a limiting ring. An air assembly 200 is fixedly connected to the top of the air compressor housing 100 above the eccentric wheel 140. A movable groove 230 is opened on the side of the air assembly 200 near the eccentric wheel 140. A piston 150 is slidably arranged inside the movable groove 230. The bottom of the piston 150 is connected to the eccentric wheel 140 by a limiting plate. The contact limit plate is connected to the top plate of the air compressor housing 100 by a spring 160. This allows the piston 150 to change its vertical position when the eccentric wheel 140 rotates, thereby compressing the air inside the air assembly 200. A mounting groove 151 is provided on the top of the piston 150. An annular limit frame 152 is fixedly installed on the inner wall of the mounting groove 151. A needle roller 153 is rotatably placed on the inner wall of the limit frame 152. A limit block 154 is placed on the mounting groove 151 and is rotatably positioned below the needle roller 153. A rotating shaft 155 is fixedly installed above the limit block 154. The outer wall of the rotating shaft 155 is in contact with the needle roller 153. The air assembly 200 is equipped with multiple guide vanes 156 and an air inlet pipe 210 and an air outlet pipe 220. One-way valves are installed on both the air inlet pipe 210 and the air outlet pipe 220. An air pump is connected to the air inlet pipe 210, which injects air into the air assembly 200, causing the guide vanes 156 and the rotating shaft 155 to rotate. This accelerates the airflow inside the air assembly 200, cooling the inner wall of the piston 150 where it rubs against the movable groove 230. Simultaneously, an oil reservoir 170 is provided on the piston 150 below the mounting groove 151. The oil reservoir 170 is connected to the mounting groove 151 via an oil inlet 172. This allows for the filling of the mounting groove 151 with oil... Internal oil injection allows lubricating oil to be injected into the oil reservoir 170. An annular groove 240 is provided on the inner wall of the movable groove 230. When the heat dissipation mechanism is rotated by air, it simultaneously drives the fixed rod 180 to rotate. Consequently, the arc plate 181 rotates with the fixed rod 180, thus maintaining the flow of lubricating oil inside the oil reservoir 170 while also throwing lubricating oil from the oil inlet 172 into the annular groove 240. This allows for intermittent replenishment of lubricating oil, thereby achieving automatic lubrication of the contact surface between the piston 150 and the movable groove 230. This reduces the frictional resistance of the piston 150 during movement, lowers operating noise, and avoids wear caused by friction, extending the service life of the piston 150 and the movable groove 230.

[0057] In summary, this oil-free silent air compressor utilizes a heat dissipation mechanism on the top of the piston 150, comprising a mounting groove 151, a limiting bracket 152, a needle roller 153, a limiting block 154, a rotating shaft 155, and guide vanes 156. When the piston 150 moves, the continuous airflow entering the intake pipe 210 drives the rotating shaft 155 and guide vanes 156 to rotate, thus actively dissipating heat from the air assembly 200. The spiral guide vanes 156, during rotation, accelerate airflow, quickly removing heat generated during gas compression in the air assembly 200. This prevents a decrease in gas compression efficiency and performance degradation due to high temperatures, effectively reducing the internal temperature of the air assembly 200. This ensures the air compressor maintains a highly efficient and stable operating state even during prolonged operation, improving the equipment's continuous working capacity and reliability.

[0058] In summary, this oil-free silent air compressor has an oil reservoir 170 connected to the piston 150 via an oil inlet 172 below the mounting groove 151 on the top of the piston 150. The outer wall of the oil reservoir 170 has a through outlet 171. A fixing rod 180 is fixedly connected to the bottom surface of the limiting block 154 of the heat dissipation mechanism, and an arc-shaped plate 181 is provided on the fixing rod 180. An annular groove 240 is also provided on the inner wall of the movable groove 230 of the air compressor housing 100. Thus, only when the piston 150 moves... When the oil port 171 reaches the position flush with the annular groove 240, the rotating arc plate 181 will throw the lubricating oil inside the oil reservoir 170 from the oil inlet 172 into the annular groove 240, thereby intermittently replenishing the lubricating oil and realizing automatic lubrication of the contact surface between the piston 150 and the movable groove 230. This reduces the frictional resistance of the piston 150 during movement, lowers operating noise, avoids wear caused by friction, and extends the service life of the piston 150 and the movable groove 230.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-free silent air compressor, comprising an air compressor housing (100), wherein a drive shaft (120) is transversely arranged inside the air compressor housing (100), and a gear (110) is fixedly connected to one side of the drive shaft (120), the gear (110) being capable of meshing with an external transmission mechanism to drive the rotation of the drive shaft (120), characterized in that: An eccentric wheel (140) is fixedly mounted on the drive shaft (120). An air assembly (200) is fixedly mounted on the air compressor housing (100). One side of the air assembly (200) is connected to an air inlet pipe (210), and the other side is connected to an air outlet pipe (220). The air inlet pipe (210) is connected to an air pump. A piston (150) is positioned directly above the eccentric wheel (140). A movable groove (230) is provided on the lower surface of the air assembly (200). The movable groove (230) is connected to the air inlet pipe (210) and the air outlet pipe (220) respectively. The piston (150) slides against the inside of the movable groove (230), and the bottom of the piston (150) is in contact with the eccentric wheel (140). A heat dissipation mechanism is provided on the top of the piston (150), which can cool the inside of the air assembly (200).

2. The oil-free silent air compressor according to claim 1, characterized in that, The heat dissipation mechanism includes: A mounting slot (151) is provided on the top of the piston (150); The limiting bracket (152) is fixedly installed inside the mounting slot (151); The needle roller (153) is rotatably fitted onto the inner wall of the limiting frame (152); A limiting block (154) is disposed inside the limiting frame (152) and below the needle roller (153); A rotating shaft (155) is fixedly disposed above the limiting block (154), and the upper surface of the rotating shaft (155) is set to extend beyond the upper surface of the piston (150). Multiple guide vanes (156) are fixedly mounted on the rotating shaft (155), and the guide vanes (156) are spiral blades.

3. The oil-free silent air compressor according to claim 2, characterized in that, An oil reservoir (170) is also provided on the piston (150) below the mounting groove (151). The oil reservoir (170) is connected to the mounting groove (151) through an oil inlet (172). An oil outlet (171) is provided on the side wall of the oil reservoir (170) to release the lubricating oil inside the oil reservoir (170) to the inner wall between the piston (150) and the movable groove (230) for lubrication.

4. The oil-free silent air compressor according to claim 3, characterized in that, The inner wall of the movable groove (230) is provided with an annular groove (240), the width of which is greater than the width of the oil outlet (171).

5. The oil-free silent air compressor according to claim 3, characterized in that, A fixing rod (180) is fixedly connected to the lower surface of the limiting block (154), and an arc plate (181) is fixedly connected to the fixing rod (180). The fixing rod (180) and the arc plate (181) are located inside the oil storage tank (170).

6. The oil-free silent air compressor according to claim 1, characterized in that, The air inlet pipe (210) and the air outlet pipe (220) are both fixed to the air assembly (200) by means of threaded connection. The air assembly (200) is provided with a one-way valve plate inside. The one-way valve plate is located at the connection between the air inlet pipe (210) and the air outlet pipe (220) and the movable groove (230) to realize the one-way flow of gas.

7. The oil-free silent air compressor according to claim 1, characterized in that, The two ends of the drive shaft (120) are limited to the inside of the air compressor housing (100) by bearings (130).

8. The oil-free silent air compressor according to claim 2, characterized in that, A limiting plate is fixedly installed below the piston (150), and a spring (160) is fixedly connected above the limiting plate. The top of the spring (160) is fixedly connected to the inner wall of the upper surface of the air compressor housing (100), and the spring (160) is fitted around the limiting frame (152).

9. The oil-free silent air compressor according to claim 1, characterized in that, The contact area between the eccentric wheel (140) and the piston (150) is provided with a wear-resistant layer. The wear-resistant layer is made of ceramic composite material and is used to improve the wear resistance of the contact area between the eccentric wheel (140) and the piston (150) and extend its service life.

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