Double-head pump

Abstract

The utility model discloses a double-head pump which comprises a double-head motor and pumps installed at the two ends of the double-head motor, each pump comprises an air inlet cavity, a wriggling structure and an air outlet structure, the wriggling structure is installed between the air inlet cavity and the air outlet structure, and an air inlet pipe is arranged on the air inlet cavity; a sealing groove is formed in the bottom of the air inlet cavity, a first sealing ring is installed in the sealing groove, and a rotating shaft of the double-end motor penetrates through the first sealing ring to be in transmission connection with the wriggling structure. A sealing groove is formed in the bottom of the air inlet cavity, a mounting groove is further formed in the position, on the outer side of the sealing groove, of the bottom of the air inlet cavity, a second sealing ring is arranged in the mounting groove, and a screw used for connecting the air inlet cavity with a shell of the double-end motor is mounted in the mounting groove. The problem of air leakage between the air outlet cavity and the double-end motor shell is effectively solved, and the stability of the pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of peristaltic pumps, and specifically belongs to a double-headed pump. Background Art

[0002] Existing air pumps are mainly used on the air bags of health care equipment. The air flow of existing single-headed air pumps is small and cannot meet the demand for flow. In addition, the peristaltic structure of existing peristaltic pumps mainly uses an eccentric wheel and a steel needle for transmission work, resulting in wear between the steel needle and the eccentric wheel during long-term use, affecting the stability of the air supply pressure. At the same time, the structural design of existing air pumps is unreasonable, and it is easy to leak air after being used for a period of time, which will also cause a decrease in the air supply pressure. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a double-headed pump, which overcomes the deficiencies of the prior art.

[0004] To solve the above problems, the technical solutions adopted by the utility model are as follows:

[0005] A double-headed pump includes a double-headed motor and pumps installed at both ends of the double-headed motor. The pump includes an air inlet chamber, a peristaltic structure, and an air outlet structure. The peristaltic structure is installed between the air inlet chamber and the air outlet structure, and an air inlet pipe is provided on the air inlet chamber.

[0006] A sealing groove is provided at the bottom of the air inlet chamber. A first sealing ring is installed in the sealing groove. The rotating shaft of the double-headed motor passes through the first sealing ring and is in transmission connection with the peristaltic structure. An installation groove is further provided at the bottom of the air inlet chamber outside the sealing groove. A second sealing ring is provided in the installation groove, and a screw for connecting the air inlet chamber and the outer shell of the double-headed motor is installed in the installation groove.

[0007] Further, an air inlet pipe is provided on the air inlet chamber. An eccentric column connected to the rotating shaft is provided in the air inlet chamber. A steel needle is obliquely installed on the eccentric column. A peristaltic disc is installed on the steel needle. At least three installation holes are evenly installed on the edge of the peristaltic disc. The peristaltic disc, the steel needle, and the eccentric column constitute the peristaltic structure.

[0008] Further, the steel needle is connected to the peristaltic disc through a bearing and a bearing sleeve. The steel needle is connected to the bearing sleeve. The bearing sleeve is installed on the inner ring of the bearing. The steel needle and the bearing sleeve can rotate freely on the bearing.

[0009] Furthermore, the air outlet structure includes a mounting plate and a partition plate cooperatively arranged with the mounting plate. The mounting plate is provided with rubber suction cups corresponding to the number of mounting holes. The openings of the rubber suction cups are located on the upper surface of the mounting plate. A connecting needle is installed at the rear end of the rubber suction cup. A limiting ring is arranged in the middle of the connecting needle. The connecting needle can be inserted into the mounting hole, and the limiting ring fixes the connecting needle on the peristaltic disc. An air inlet hole corresponding to the number of rubber suction cups is further provided in the middle of the mounting plate. A one-way valve is installed in the air inlet hole. An air guiding channel corresponding to the number of air inlet holes is provided on the lower surface of the partition plate. The air guiding channel communicates the corresponding air inlet hole and the opening of the rubber suction cup. An air outlet device corresponding to the number of rubber suction cups is installed on the partition plate. An air outlet shell is installed on the upper surface of the partition plate. An air outlet pipe is provided on the air outlet shell.

[0010] Furthermore, the air outlet device includes an air outlet hole provided on the partition plate within the opening range of the rubber suction cup. A rubber sealing sheet is further installed on the partition plate at the air outlet hole. The rubber sealing sheet is located on the upper surface of the partition plate and can seal the air outlet hole.

[0011] Furthermore, a gas blocking ring cooperating with the upper surface of the partition plate is further provided in the air outlet shell. Separation edges corresponding to the number and positions of the air outlet devices are further provided on the air outlet shell within the gas blocking ring. The separation edges cooperate with the upper surface of the partition plate. An air outlet cavity is formed between the separation edges and the gas blocking ring. An exhaust channel is formed between the separation edges. The air outlet cavity communicates with the exhaust channel. An exhaust port is provided in the middle of the air outlet shell. The exhaust port communicates with the exhaust channel. The air outlet pipe is arranged at the exhaust port.

[0012] Furthermore, a convex platform cooperating with the air outlet cavity is further provided on the upper surface of the partition plate. The rubber sealing sheet is installed on the partition plate at the convex platform.

[0013] Compared with the prior art, the implementation effects of the present utility model are as follows:

[0014] 1. The steel needle of the double-headed pump is connected to the peristaltic disc through a bearing and a bearing sleeve, so that the steel needle and the peristaltic disc are not easily worn during operation, improving the durability of the pump;

[0015] 2. The bottom of the air outlet cavity passes through the first sealing ring and the second sealing ring, effectively avoiding the problem of air leakage between the air outlet cavity and the double-headed motor housing, improving the stability of the pump;

[0016] 3. The exhaust channel provided in the air outlet shell can reduce the volume of the exhaust channel in the air outlet cavity, making the output air pressure more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the inside of the air inlet cavity;

[0019] Figure 3 Schematic diagram of the installation structure of the peristaltic disc in the air inlet cavity;

[0020] Figure 4 Schematic diagram of the structure of the lower surface of the peristaltic disc;

[0021] Figure 5 Schematic diagram of the structure of the bottom of the air inlet cavity;

[0022] Figure 6 Schematic diagram of the installation structure of the rubber suction cup;

[0023] Figure 7 Schematic diagram of the structure of the lower surface of the partition plate;

[0024] Figure 8 It is Figure 7 The B-B cross-sectional view in

[0025] Figure 9 Schematic diagram of the structure of the upper surface of the partition plate;

[0026] Figure 10 Schematic diagram of the structure inside the air outlet housing.

[0027] Explanation of reference numerals: 1. Double-headed motor; 2. Air inlet cavity; 21. Air inlet pipe; 22. Eccentric column; 23. Steel needle; 24. Peristaltic disc; 241. Bearing; 242. Bearing sleeve; 25. Mounting hole; 26. Screw hole; 27. First sealing ring; 28. Second sealing ring; 29. Screw; 11. Sealing groove; 3. Mounting plate; 31. Air inlet hole; 32. Check valve; 4. Partition plate; 41. Positioning pipe; 42. Air guiding channel; 43. Air outlet hole; 44. Boss; 5. Rubber suction cup; 51. Connecting needle; 52. Limiting ring; 6. Rubber sealing sheet; 61. Connecting column; 7. Air outlet housing; 71. Air blocking ring; 72. Partition edge; 73. Air outlet cavity; 74. Exhaust channel; 75. Exhaust port; 8. Air outlet pipe; 9. Mounting seat. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As Figure 1 shown, the double-headed pump of the present utility model includes a double-headed motor 1 and pumps installed at both ends of the double-headed motor 1. The pump includes an air inlet chamber 2, a peristaltic structure, and an air outlet structure. The peristaltic structure is installed between the air inlet chamber 2 and the air outlet structure. An air inlet pipe 21 is provided on the air inlet chamber 2; a mounting seat 9 is installed outside the pump to facilitate the installation and use of the double-headed pump.

[0032] As Figures 2-5 shown, a sealing groove 11 is provided at the bottom of the air inlet chamber 2. A first sealing ring 27 is installed in the sealing groove 11. The rotating shaft of the double-headed motor 1 passes through the first sealing ring 27 and is in transmission connection with the peristaltic structure; a mounting groove is further provided at the bottom of the air inlet chamber 2 outside the sealing groove 11. A second sealing ring 28 is provided in the mounting groove. A screw 29 for connecting the air inlet chamber 2 to the housing of the double-headed motor 1 is installed in the mounting groove. The first sealing ring 27 and the second sealing ring 28 can effectively avoid the problem of air leakage between the air outlet chamber 73 and the housing of the double-headed motor 1, improving the stability of the pump.

[0033] An air inlet pipe 21 is provided on the air inlet chamber 2. An eccentric column 22 connected to the rotating shaft is provided in the air inlet chamber 2. A steel needle 23 is inclinedly installed on the eccentric column 22. As Figures 2-4 shown, the steel needle 23 is connected to the peristaltic disc 24 through a bearing 241 and a bearing sleeve 242. The steel needle 23 is connected to the bearing sleeve 242. The bearing sleeve 242 is installed on the inner ring of the bearing. The steel needle 23 and the bearing sleeve 242 can rotate freely on the bearing 241. Five mounting holes 25 are evenly installed on the edge of the peristaltic disc 24. The peristaltic disc 24, the steel needle 23, and the eccentric column 22 constitute the peristaltic structure.

[0034] As Figures 5-8As shown in the figure, the air outlet structure includes a mounting plate 3 and a partition plate 4 arranged in cooperation with the mounting plate 3. Five rubber suction cups 5 corresponding to the mounting holes 25 are provided on the mounting plate 3. The openings of the rubber suction cups 5 are located on the upper surface of the mounting plate 3. A connecting pin 51 is installed at the rear end of the rubber suction cup 5. A limiting ring 52 is provided in the middle of the connecting pin 51. The connecting pin 51 can be inserted into the mounting hole 25, and the limiting ring 52 fixes the connecting pin 51 on the peristaltic disc 24. Five air inlet holes 31 corresponding to the rubber suction cups 5 are also provided in the middle of the mounting plate 3. One-way valves 32 are installed in the air inlet holes 31. Five air guiding channels 42 corresponding to the air inlet holes 31 are provided on the lower surface of the partition plate 4. The air guiding channels 42 communicate the corresponding air inlet holes 31 with the openings of the rubber suction cups 5. Five air outlet devices corresponding to the rubber suction cups 5 are installed on the partition plate 4. An air outlet shell 7 is installed on the upper surface of the partition plate 4. An air outlet pipe 8 is provided on the air outlet shell 7. The air outlet device includes an air outlet hole 43 provided on the partition plate 4 within the opening range of the rubber suction cup 5. A rubber sealing sheet 6 is also installed on the partition plate 4 at the air outlet hole 43 through a connecting column 61. The rubber sealing sheet 6 is located on the upper surface of the partition plate 4, and the rubber sealing sheet 6 can close the air outlet hole 43. The steel needle 23 is inclinedly installed on the eccentric column 22. When the steel needle 23 drives the peristaltic disc 24 to move, the peristaltic disc 24 can sequentially squeeze the five rubber suction cups 5. During the extrusion of the rubber suction cups 5, the one-way valve 32 automatically closes. The air in the rubber suction cups 5 squeezes the rubber sealing sheet 6, and the air enters the air outlet shell 7 from the air outlet hole 43. During the process of the rubber suction cups 5 returning to their original positions after being extruded, a negative pressure is generated in the rubber suction cups 5, so that the rubber sealing sheet 6 closes the air outlet hole 43, and the one-way valve 32 can intake air from the air inlet cavity 2 to realize the intake of air in the rubber suction cups 5. When the rubber suction cups 5 are squeezed again, air can be supplied to the air outlet cavity 73.

[0035] As Figures 9-10 shown, a gas blocking ring 71 cooperating with the upper surface of the partition plate 4 is further provided in the air outlet shell 7. Partition ribs 72 corresponding to the number and positions of the air outlet devices are also provided on the air outlet shell 7 within the gas blocking ring 71. The partition ribs 72 cooperate with the upper surface of the partition plate 4. An air outlet cavity 73 is formed between the partition ribs 72 and the gas blocking ring 71. An exhaust channel 74 is formed between the partition ribs 72 and the partition ribs 72. The air outlet cavity 73 is communicated with the exhaust channel 74. An exhaust port 75 is provided in the middle of the air outlet shell 7. The exhaust port 75 is communicated with the exhaust channel 74. The air outlet pipe 8 is arranged at the exhaust port 75. A convex platform 44 cooperating with the air outlet cavity 73 is also provided on the upper surface of the partition plate 4. The rubber sealing sheet 6 is installed on the partition plate 4 at the convex platform 44. The gas blocking ring 71 and the partition ribs 72 are provided to reduce the air flow space in the air outlet cavity 73, make the pressure of the compressed air more stable, and supply air more smoothly.

[0036] In addition, a positioning tube 41 is provided on the partition plate 4, a clamping groove cooperating with the positioning tube 41 is provided on the mounting plate 3, and a screw hole 26 corresponding to the positioning tube 41 is provided on the air inlet cavity 2, so that the bolt on the air outlet shell 7 can pass through the positioning tube 41 and be installed in the screw hole 26, realizing the connection and fixation of the air outlet shell 7, the mounting plate 3, the partition plate 4 and the air inlet cavity 2.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-headed pump, comprising a double-headed motor and pumps installed at both ends of the double-headed motor, characterized in that: The pump includes an air inlet chamber, a peristaltic structure, and an air outlet structure. The peristaltic structure is installed between the air inlet chamber and the air outlet structure, and an air inlet pipe is provided on the air inlet chamber. A sealing groove is provided at the bottom of the air inlet chamber. A first sealing ring is installed in the sealing groove. The rotating shaft of the double-headed motor passes through the first sealing ring and is in transmission connection with the peristaltic structure. An installation groove is further provided at the bottom of the air inlet chamber outside the sealing groove. A second sealing ring is provided in the installation groove, and a screw for connecting the air inlet chamber and the housing of the double-headed motor is installed in the installation groove.

2. The double-headed pump according to claim 1, characterized in that: An air inlet pipe is provided on the air inlet chamber. An eccentric column connected to the rotating shaft is provided in the air inlet chamber. A steel needle is inclinedly installed on the eccentric column. A peristaltic disc is installed on the steel needle. At least three installation holes are evenly installed on the edge of the peristaltic disc. The peristaltic disc, the steel needle, and the eccentric column constitute the peristaltic structure.

3. The double-headed pump according to claim 2, wherein: The steel needle is connected to the peristaltic disc through a bearing and a bearing sleeve. The steel needle is connected to the bearing sleeve, and the bearing sleeve is installed in the inner ring of the bearing.

4. The double-headed pump according to claim 2, wherein: The air outlet structure includes a mounting plate and a partition plate cooperatively arranged with the mounting plate. Rubber suction cups corresponding to the number of the installation holes are provided on the mounting plate. The openings of the rubber suction cups are located on the upper surface of the mounting plate. A connecting needle is installed at the rear end of the rubber suction cup. A limiting ring is provided in the middle of the connecting needle. The connecting needle can be inserted into the installation hole, and the limiting ring fixes the connecting needle on the peristaltic disc. An air inlet hole corresponding to the number of the rubber suction cups is further provided in the middle of the mounting plate. A one-way valve is installed in the air inlet hole. Air guiding channels corresponding to the number of the air inlet holes are provided on the lower surface of the partition plate. The air guiding channels communicate the corresponding air inlet holes and the openings of the rubber suction cups. An air outlet device corresponding to the number of the rubber suction cups is installed on the partition plate. An air outlet housing is installed on the upper surface of the partition plate, and an air outlet pipe is provided on the air outlet housing.

5. A double-headed pump according to claim 4, characterized in that: The air outlet device includes an air outlet hole provided on the partition plate within the opening range of the rubber suction cup. A rubber sealing sheet is further installed on the partition plate at the air outlet hole. The rubber sealing sheet is located on the upper surface of the partition plate and can seal the air outlet hole.

6. The double-headed pump according to claim 5, characterized in that: A gas blocking ring cooperating with the upper surface of the partition plate is further provided in the air outlet housing. Partition edges corresponding to the number and positions of the air outlet devices are provided on the air outlet housing within the gas blocking ring. The partition edges cooperate with the upper surface of the partition plate. An air outlet chamber is formed between the partition edges and the gas blocking ring, and an exhaust channel is formed between the partition edges. The air outlet chamber is communicated with the exhaust channel. An exhaust port is provided in the middle of the air outlet housing, and the exhaust port is communicated with the exhaust channel. The air outlet pipe is provided at the exhaust port.

7. The double-headed pump according to claim 6, characterized in that: A boss cooperating with the air outlet chamber is further provided on the upper surface of the partition plate. The rubber sealing sheet is installed on the partition plate at the boss.

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