A large flow vacuum air pump

Abstract

The utility model discloses a kind of large-flow vacuum air pumps, including upper cover, middle plate, cylinder body, fixed base, eccentric swing frame assembly, leather bowl assembly and drive assembly, leather bowl assembly includes substrate, four leather bowls are integrally formed in substrate bottom, eccentric swing frame assembly includes eccentric shaft and eccentric swing frame, eccentric swing frame is connected with eccentric shaft, four connecting pieces corresponding with leather bowl are equipped on eccentric swing frame, drive assembly is connected with eccentric shaft, to drive eccentric shaft to make eccentric rotation, and make eccentric swing frame extrude leather bowl to pump, four leather bowls are driven by eccentric swing frame and complete suction and discharge action alternately, form continuous pumping cycle, compared with three leather bowl design, four leather bowls complete two complete suction and discharge cycles in eccentric shaft single cycle, the effective displacement of single cycle is larger, significantly improve the flow output in unit time, four leather bowls can be more quickly evacuated air in pump cavity in alternate compression process.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, specifically a high-flow-rate vacuum pump. Background Technology

[0002] A vacuum pump typically consists of a pump body, piston cups, inlet and outlet valves, and a drive mechanism. Its working principle relies on the reciprocating motion of the piston cups to create a vacuum or pressure difference, thereby enabling the intake and exhaust of gas. Currently, most vacuum pumps on the market use a three-piston cup design. Due to the small number of piston cups, each piston cup must bear a greater mechanical load and sealing pressure. This leads to the equipment generating significant noise during operation due to uneven load and increased friction. At the same time, the sealed cavity formed by the three piston cups has a small volume, limiting the amount of gas that can be drawn in and expelled with each reciprocating motion, directly resulting in reduced flow rate and difficulty in meeting high flow rate requirements. Furthermore, an insufficient number of piston cups weakens the pump's ability to generate negative pressure, making it impossible to create a sufficient vacuum during pumping, which in turn affects the adsorption and lifting effect of gas, ultimately resulting in low negative pressure and low pumping efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a high-flow vacuum pump, which can effectively solve the technical problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a high-flow vacuum pump, including an upper cover, a middle plate, a cylinder, a fixed base, an eccentric swing frame assembly, a cup assembly, and a drive assembly. The cup assembly includes a base plate, and four cups are integrally formed on the bottom of the base plate. The eccentric swing frame assembly includes an eccentric shaft and an eccentric swing frame. The eccentric swing frame is connected to the eccentric shaft, and four connecting parts corresponding to the cups are provided on the eccentric swing frame. The drive assembly is connected to the eccentric shaft to drive the eccentric shaft to perform eccentric rotational motion, and to make the eccentric swing frame squeeze the cups for pumping.

[0005] Furthermore, the upper cover, middle plate, fixed base and cylinder are connected in sequence to form a pump body structure, and the side of the cylinder body is provided with a gas inlet.

[0006] Furthermore, the cylinder body has an opening at the upper end, the fixing seat has four slots, the fixing seat is mounted on the cylinder body, the base plate is mounted on the fixing seat, and the diaphragm cup is located inside the slots. The bottom of the leather cup is provided with an opening and the top is provided with a first venting groove. The bottom of the connector is provided with an opening and the top is provided with a second venting groove. The end of the connector away from the eccentric swing frame extends into the inside of the leather cup.

[0007] Furthermore, the substrate is in the shape of a rectangular plate, with four cups evenly distributed on the substrate.

[0008] Furthermore, the outer edge of the substrate is provided with a first positioning groove, and the outer edge of the fixing seat is provided with a positioning protrusion.

[0009] Furthermore, the outer edge of the middle plate is provided with a second positioning groove that cooperates with the positioning protrusion.

[0010] Furthermore, the middle plate is provided with at least one exhaust channel, and the middle plate is equipped with an umbrella-shaped prong, the bottom end of which is provided with a movable rod that is movably connected to the exhaust channel.

[0011] Furthermore, the bottom end of the movable rod is provided with a limiting part integrally formed therewith, and the outer diameter of the limiting part is larger than the diameter of the exhaust channel.

[0012] Furthermore, the bottom end of the upper cover is open to form a receiving cavity for containing gas, and the upper cover is provided with a gas outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The bottom of the substrate is integrally formed with four cups. The four cups alternately complete the suction and discharge actions under the drive of the eccentric swing frame, forming a continuous pumping cycle. Compared with the three cup design, the four cups complete two complete suction and discharge cycles in a single cycle of the eccentric shaft, and the effective discharge volume of a single cycle is larger, thereby significantly improving the flow output per unit time. 2. During the alternating compression process, the four rubber cups can expel air from the pump chamber more quickly, creating a higher negative pressure environment; 3. The substrate is a rectangular flat plate with four cups evenly distributed on it. With the center of the substrate as the symmetrical point, they are opposite each other in pairs. During the pumping process, the eccentric swing frame squeezes the cups, forming a symmetrical force transmission system. This system can counteract the lateral eccentric force generated when the eccentric swing frame rotates, thereby reducing the vibration caused by excessive single-point load and thus reducing the operating noise of the equipment. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a high-flow-rate vacuum pump; Figure 2 An exploded view of the structure of a high-flow-rate vacuum pump; Figure 3 This is a structural schematic diagram of the eccentric swing frame assembly; Figure 4 Exploded view of the eccentric swing frame assembly, fixing base and base plate from a top view angle; Figure 5 Exploded view of the eccentric swing frame assembly, fixing base, and substrate from a bottom angle; Figure 6 This is a schematic diagram of the internal structure of the middle plate; Figure 7 This is a schematic diagram of the umbrella-shaped structure.

[0015] Numbering on the map: 10. Top cover; 11. Gas outlet; 20. Middle plate; 21. Umbrella stud; 22. Second positioning groove; 23. Receiving cavity; 24. Movable rod; 25. Limiting part; 30. Fixed seat; 31. Empty groove; 40. Cylinder body; 41. Gas inlet; 50. Drive assembly; 51. Rotary drive motor; 52. Sealing ring; 53. Flat key; 60. Leather cup assembly; 61. Base plate; 62. Leather cup; 63. Eccentric swing frame; 64. Bowl mouth; 65. First exhaust groove; 66. First positioning groove; 68. Positioning protrusion; 69. Connector; 610. Eccentric shaft; 611. Second exhaust groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-7 As shown, this utility model provides a high-flow vacuum pump, including an upper cover 10, a middle plate 20, a cylinder 40, a fixed base 30, an eccentric swing frame assembly, a cup assembly 60, and a drive assembly 50. The upper cover 10, middle plate 20, fixed base 30 and cylinder 40 are stacked and connected in sequence to form a closed pump body structure. The cylinder 40 has a gas inlet 41 on its side for gas intake. The gas inlet 41 is provided with an interface structure for connecting to an external pipe. The interface structure can also play a positioning and foolproof role, making it easy for users to identify the installation direction of the air pump and external equipment. The bottom of the upper cover 10 is open to form a gas receiving cavity 23. The upper cover 10 is provided with a gas outlet 11 for gas discharge. The leather cup assembly 60 of this embodiment includes a base plate 61. Four leather cups 62 are integrally formed on the bottom of the base plate 61. Each leather cup 62 corresponds to a bowl opening 64 provided on the base plate 61. The leather cups 62 are made of highly elastic and corrosion-resistant rubber material. The eccentric swing frame assembly of this embodiment includes an eccentric shaft 610 and an eccentric swing frame 63. The eccentric swing frame 63 is located below the leather cup 62. The eccentric swing frame 63 is connected to the eccentric shaft 610 through a flat key 53 to ensure that the eccentric swing frame 63 can stably follow the movement when the eccentric shaft 610 rotates. The eccentric swing frame 63 is provided with four connecting parts 69 corresponding to the leather cup 62. The end shape of the connecting parts is adapted to the leather cup 62. The drive assembly 50 is connected to the eccentric shaft 610 to drive the eccentric shaft 610 to perform eccentric rotational movement and cause the eccentric swing frame 63 to squeeze the leather cup 62 for pumping.

[0018] In this embodiment, the cylinder body 40 has an opening at the upper end and a through hole at the bottom. The drive assembly 50 is a rotary drive motor 51. The output shaft of the rotary drive motor 51 passes through the through hole, and a sealing ring 52 is fitted on the outside of the output shaft. In this embodiment, the fixed base 30 is provided with four slots 31, the positions of which correspond to the positions of the cup 62. The size of the slots 31 is slightly larger than the size of the cup 62, providing sufficient space for the movement of the cup 62. The fixed base 30 is mounted on the cylinder 40 and the two are connected by bolts. The base plate 61 is mounted on the fixed base 30. The cup 62 is located inside the slots 31. The bottom end of the cup 62 is provided with an opening and the top end is provided with a first exhaust groove 65, which is semi-circular in shape. The bottom end of the connector 69 is open and the top end is provided with a second exhaust groove 611. The end of the connector 69 away from the eccentric swing frame 63 extends into the cup 62. The space at the bottom opening of the cup 62 is connected to the inside of the cylinder 40. When the drive assembly 50 drives the eccentric shaft 610 to rotate eccentrically, the eccentric swing arm 63 swings upward accordingly. During this process, the connector 69 pushes the cup 62 upward. Since the cup 62 is made of high elastic rubber material, the top of the cup 62 undergoes controllable deformation when subjected to force. The internal volume of the cup 62 expands rapidly to form a negative pressure cavity. At this time, the air outside the cylinder 40 is drawn into the cylinder 40 through the gas inlet 41 under the action of negative pressure and enters the space formed by the bottom opening of the cup 62, completing the air intake process. When the eccentric swing frame 63 swings downward, the connector 69 and the cup 62 are no longer in contact. Due to its elastic properties, the cup 62 quickly recovers its deformation and the internal volume of the cup 62 decreases. At this time, the gas drawn into the cup 62 is compressed and the pressure increases. The compressed gas is pumped upward along the first exhaust groove 65.

[0019] In this embodiment, the substrate 61 is a rectangular plate with four cups 62 evenly distributed on it, facing each other in pairs with the center of the substrate 61 as the symmetrical point. The outer edge of the substrate 61 is provided with a first positioning groove 66, and the outer edge of the fixing seat 30 is provided with positioning protrusions 68. The number of positioning protrusions 68 is the same as the number of first positioning grooves 66 on the substrate 61 and their positions correspond. In addition, the length of the positioning protrusions 68 is greater than the depth of the first positioning grooves 66. When the substrate 61 is assembled on the fixing seat 30, the positioning protrusions 68 are embedded in the first positioning grooves 66, so as to achieve precise positioning of the substrate 61 and the fixing seat 30.

[0020] In this embodiment, the outer edge of the middle plate 20 is provided with a second positioning groove 22 that cooperates with the positioning protrusion 68. The number of the second positioning grooves 22 is the same as the number of positioning protrusions 68 on the fixed base 30, and their positions correspond. When the middle plate 20 is assembled on the base plate 61, the positioning protrusion 68 is embedded in the second positioning groove 22 to achieve precise positioning of the middle plate 20 and the base plate 61. The middle plate 20 has an inner groove at one end facing the base plate 61. The number of inner grooves is the same as the number of bowls 64 and their positions correspond. The middle plate 20 has at least one exhaust channel that penetrates its thickness. The middle plate 20 is equipped with umbrella pins 21 corresponding to the number of inner grooves. The bottom end of the umbrella pins 21 is provided with a movable rod 24 that is movably connected to the exhaust channel. The bottom end of the movable rod 24 is provided with a limiting part 25 integrally formed therewith. The limiting part 25 is spherical and its outer diameter is larger than the diameter of the exhaust channel, so that the movable rod 24 cannot be removed from the middle plate 20. When there is no gas impact, the umbrella pins 21 completely cover the exhaust channel under their own weight, which acts as a one-way valve. When the gas is pumped upward along the first exhaust groove 65, the gas pressure overcomes the gravity of the umbrella pins 21 and pushes them away from the middle plate 20, so that the gas flows into the receiving cavity 23 from the gap between the umbrella pins 21 and the end face of the middle plate 20, and finally is discharged from the gas outlet 11.

[0021] Compared to traditional technologies: 1. The bottom of the substrate 61 is integrally formed with four cups 62. The four cups 62 alternately complete the suction and discharge actions under the drive of the eccentric swing frame 63, forming a continuous pumping cycle. Compared with the three cups 62 design, the four cups 62 complete two complete suction and discharge cycles in a single cycle of the eccentric shaft 610, and the effective discharge volume of a single cycle is larger, thereby significantly improving the flow output per unit time. 2. During the alternating compression process, the four rubber cups 62 can expel the air in the pump chamber more quickly, creating a higher negative pressure environment; 3. The substrate 61 is a rectangular flat plate. Four cups 62 are evenly distributed on the substrate 61. With the center of the substrate 61 as the symmetrical point, they are opposite each other in pairs. During the pumping process, the eccentric swing frame 63 squeezes the cups 62 to form a symmetrical force transmission system, which can counteract the lateral eccentric force generated when the eccentric swing frame 63 rotates. This reduces the vibration caused by excessive single-point load and thus reduces the operating noise of the equipment.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the drawings should be construed as limiting the scope of the claims.

Claims

1. A high-flow-rate vacuum pump, comprising a top cover, a middle plate, a cylinder, a fixed base, an eccentric swing arm assembly, a cup assembly, and a drive assembly, characterized in that, The leather cup assembly includes a base plate, with four leather cups integrally formed on the bottom of the base plate. The eccentric swing frame assembly includes an eccentric shaft and an eccentric swing frame. The eccentric swing frame is connected to the eccentric shaft, and the eccentric swing frame is provided with four connecting parts corresponding to the leather cups. The drive assembly is connected to the eccentric shaft to drive the eccentric shaft to perform eccentric rotational motion, and to make the eccentric swing frame squeeze the leather cups for pumping.

2. The high-flow-rate vacuum pump according to claim 1, characterized in that, The upper cover, middle plate, fixed base and cylinder are connected in sequence to form a pump body structure, and the side of the cylinder body is provided with a gas inlet.

3. A high-flow-rate vacuum pump according to claim 1, characterized in that, The cylinder body has an opening at the upper end, the fixing seat has four slots, the fixing seat is mounted on the cylinder body, the base plate is mounted on the fixing seat, and the leather cup is located inside the slots. The bottom of the leather cup is provided with an opening and the top is provided with a first venting groove. The bottom of the connector is provided with an opening and the top is provided with a second venting groove. The end of the connector away from the eccentric swing frame extends into the inside of the leather cup.

4. A high-flow-rate vacuum pump according to claim 1, characterized in that, The substrate is a rectangular flat plate with four cups evenly distributed on it.

5. A high-flow-rate vacuum pump according to claim 1, characterized in that, The outer edge of the substrate is provided with a first positioning groove, and the outer edge of the fixing seat is provided with a positioning protrusion.

6. A high-flow-rate vacuum pump according to claim 5, characterized in that, The outer edge of the middle plate is provided with a second positioning groove that cooperates with the positioning protrusion.

7. A high-flow-rate vacuum pump according to claim 1, characterized in that, The middle plate has at least one exhaust channel, and the middle plate is equipped with an umbrella pin, the bottom of which is provided with a movable rod that is movably connected to the exhaust channel.

8. A high-flow-rate vacuum pump according to claim 7, characterized in that, The bottom end of the movable rod is provided with a limiting part integrally formed therewith, and the outer diameter of the limiting part is larger than the diameter of the exhaust channel.

9. A high-flow-rate vacuum pump according to claim 1, characterized in that, The bottom end of the upper cover is open to form a cavity for containing gas, and the upper cover is provided with a gas outlet.

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