Silent long-life diaphragm air pump

Abstract

The utility model relates to a kind of mute long-life diaphragm air pump.The mute long-life diaphragm air pump includes: shell, motor, eccentric wheel, swing arm and the skin bowl of connecting swing arm, skin bowl is provided with air outlet valve piece and air inlet valve piece, air outlet valve piece is used to cooperate with the air outlet of skin bowl, air inlet valve piece is used to cooperate with the air inlet of skin bowl, eccentric wheel, swing arm, skin bowl, air outlet valve piece and air inlet valve piece are all arranged in the inside of shell, motor is arranged in the outside of shell;Eccentric wheel is connected swing arm by eccentric shaft, one end of eccentric shaft is connected eccentric wheel, the other end of eccentric shaft is respectively sleeved with first ball bearing, second ball bearing and bearing retainer, swing arm is equipped with shaft hole, first ball bearing, second ball bearing and bearing retainer are all arranged in the inside of shaft hole, bearing retainer connects first ball bearing, first ball bearing connects second ball bearing, bearing retainer and shaft hole are connected with interference fit.The mute long-life diaphragm air pump can reduce airflow noise, and has long service life.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm air pump technology, and in particular to a quiet, long-life diaphragm air pump. Background Technology

[0002] Most existing diaphragm air pumps use single-layer, direct-outlet air channels for both the inlet and outlet. This structure easily generates significant airflow noise when airflows at high speeds, and the noise overflows directly from the inlet and outlet, affecting the user experience. Furthermore, the drive mechanism of current diaphragm air pumps uses a plastic eccentric wheel, with a sliding fit between the internal eccentric hole and the metal shaft. During prolonged operation, sliding friction causes wear and increased clearance in the eccentric hole, leading to decreased drive efficiency, a significant drop in flow and pressure, a shortened lifespan, and poor performance stability throughout its lifespan. Therefore, there is still room for improvement in reducing airflow noise, extending service life, and maintaining performance stability in existing diaphragm air pumps. Utility Model Content

[0003] Therefore, it is necessary to provide a quiet, long-life diaphragm air pump to address the problems of existing diaphragm air pumps in reducing airflow noise, extending service life, and maintaining performance stability.

[0004] A quiet, long-life diaphragm air pump includes: a housing, a motor, an eccentric wheel connected to the motor, a swing arm connected to the eccentric wheel, and a diaphragm cup connected to the swing arm. The diaphragm cup is provided with an outlet valve and an inlet valve. The outlet valve is used to cooperate with the outlet of the diaphragm cup, and the inlet valve is used to cooperate with the inlet of the diaphragm cup. The eccentric wheel, the swing arm, the diaphragm cup, the outlet valve, and the inlet valve are all located inside the housing, and the motor is located outside the housing. The eccentric wheel is connected to the rocker arm via an eccentric shaft. One end of the eccentric shaft is connected to the eccentric wheel, and the other end of the eccentric shaft is respectively fitted with a first ball bearing, a second ball bearing, and a bearing retainer. The rocker arm has a shaft hole, and the first ball bearing, the second ball bearing, and the bearing retainer are all disposed inside the shaft hole. The bearing retainer is connected to the first ball bearing, the first ball bearing is connected to the second ball bearing, and the bearing retainer is interference-fitted with the shaft hole.

[0005] When the aforementioned silent, long-life diaphragm air pump is working, the motor first drives the eccentric wheel to rotate, which in turn drives the swing arm to rotate, and the swing arm in turn drives the piston cup to move up and down. When the piston cup is stretched downward, a vacuum chamber is created, causing the inlet valve to open and the outlet valve to close, allowing external airflow to reach the inside of the piston cup through the inlet valve. When the piston cup is compressed upward, the inlet valve to close and the outlet valve to open, allowing internal airflow to reach the outside of the piston cup through the outlet valve. Since the eccentric wheel is connected to the swing arm through an eccentric shaft, one end of the eccentric shaft is connected to the eccentric wheel, and the other end of the eccentric shaft is respectively fitted with a first ball bearing, a second ball bearing, and a bearing retainer ring, and the first ball bearing, the second ball bearing, and the bearing retainer ring are all located inside the shaft hole, the eccentric wheel can drive the swing arm to rotate through the eccentric shaft. The eccentric shaft and the first and second ball bearings are all rolling connections, which can reduce the friction and wear of the eccentric shaft, extend the service life of the eccentric shaft, and maintain the stability of flow and pressure throughout the life cycle of the air pump.

[0006] In one embodiment, the eccentric wheel includes a first connecting hole that mates with the eccentric shaft, and an abutting surface is provided on the outer side of the first connecting hole, the abutting surface abutting against the end of the inner ring of the first ball bearing.

[0007] In one embodiment, the housing includes a top cover, a cup holder, a base, and a motor mounting bracket. The top cover is connected to the cup holder, the cup holder is connected to the base, the base is connected to the motor mounting bracket, and the motor mounting bracket is connected to the motor via fixing screws. The motor mounting base is provided with a first air inlet, a second air inlet, and a first buffer air inlet, and the first buffer air inlet is connected to the first air inlet and the second air inlet respectively; The upper cover is provided with an air outlet and a second buffer air outlet connected to the air outlet.

[0008] In one embodiment, the first buffer air passage is provided with a first sound-absorbing cotton that cooperates with the first air inlet passage and the second air inlet passage, and the first sound-absorbing cotton is interference-fitted with the motor mounting base. The second buffer air passage is provided with a second sound-absorbing cotton that matches the air outlet passage, and the second sound-absorbing cotton is connected to the upper cover with an interference fit.

[0009] In one embodiment, the eccentric wheel further includes a second connecting hole and a third connecting hole. The eccentric wheel is connected to the output shaft of the motor through the second connecting hole, and the eccentric wheel is connected to a counterweight through the third connecting hole. The counterweight is provided with a protrusion that mates with the third connecting hole.

[0010] In one embodiment, the swing arm is provided with a mounting hole, the swing arm is connected to the leather cup through the mounting hole, and the leather cup fixing seat is matched with the structure of the leather cup.

[0011] In one embodiment, a valve plate mounting base is also included, wherein both the intake valve plate and the exhaust valve plate are mounted on the valve plate mounting base.

[0012] In one embodiment, the top cover, the cup holder, the base, and the motor holder are fixed together by a pump body retaining spring.

[0013] In one embodiment, the bearing retaining ring is provided with a protrusion, and the bearing retaining ring is connected to the shaft hole by interference fit through the protrusion. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the silent, long-life diaphragm air pump of this utility model; Figure 2 This is an exploded structural diagram of the silent, long-life diaphragm air pump of this utility model; Figure 3 This is a schematic diagram of the eccentric wheel in the silent, long-life diaphragm air pump of this utility model; Figure 4 This is another structural schematic diagram of the eccentric wheel in the silent long-life diaphragm air pump of this utility model; Figure 5 This is a schematic diagram of the bearing retaining ring in the silent, long-life diaphragm air pump of this utility model; Figure 6 This is a schematic diagram of the swing arm structure in the silent, long-life diaphragm air pump of this utility model; Figure 7 This is a schematic diagram of the cooperation structure between the motor mounting base, the first sound-absorbing cotton, and the fixing screws in the silent long-life diaphragm air pump of this utility model. Figure 8 This is a schematic diagram of the upper cover structure in the silent, long-life diaphragm air pump of this utility model; Figure 9 This is a schematic diagram of the airflow direction of the motor mounting base in the silent long-life diaphragm air pump of this utility model; Figure 10 This is a partial cross-sectional view of the silent, long-life diaphragm air pump of this utility model. Among them, 1 is the pump body fixing snap ring, 2 is the top cover, 201 is the air outlet, 202 is the second buffer air outlet, 3 is the second sound-absorbing cotton, 4 is the air outlet valve plate, 5 is the valve plate fixing seat, 6 is the air inlet valve plate, 7 is the leather cup, 8 is the leather cup fixing seat, 9 is the swing arm, 901 is the shaft hole, 902 is the mounting hole, 10 is the second ball bearing, 11 is the first ball bearing, 12 is the bearing retaining ring, 1201 is the protrusion, 13 is the eccentric shaft, 14 is the base, 15 is the eccentric wheel, 1501 is the first connecting hole, 1502 is the abutment surface, 1503 is the second connecting hole, 1504 is the third connecting hole, 16 is the counterweight block, 17 is the fixing screw, 18 is the first sound-absorbing cotton, 19 is the motor fixing seat, 1901 is the first air inlet, 1902 is the second air inlet, 1903 is the first buffer air outlet, 20 is the motor, and the arrow indicates the gas flow direction. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] This utility model discloses a quiet, long-life diaphragm air pump.

[0019] like Figures 1 to 10As shown, the silent long-life diaphragm air pump includes: a housing, a motor 20, an eccentric wheel 15 connected to the motor 20, a swing arm 9 connected to the eccentric wheel 15, and a cup 7 connected to the swing arm 9. The cup 7 is provided with an outlet valve 4 and an inlet valve 6. The outlet valve 4 is used to cooperate with the outlet of the cup 7, and the inlet valve 6 is used to cooperate with the inlet of the cup 7. The eccentric wheel 15, the swing arm 9, the cup 7, the outlet valve 4, and the inlet valve 6 are all located inside the housing, and the motor 20 is located outside the housing. The eccentric wheel 15 is connected to the rocker arm 9 via the eccentric shaft 13. One end of the eccentric shaft 13 is connected to the eccentric wheel 15, and the other end of the eccentric shaft 13 is respectively fitted with a first ball bearing 11, a second ball bearing 10, and a bearing retainer ring 12. The rocker arm 9 is provided with a shaft hole 901. The first ball bearing 11, the second ball bearing 10, and the bearing retainer ring 12 are all located inside the shaft hole 901. The bearing retainer ring 12 is connected to the first ball bearing 11, and the first ball bearing 11 is connected to the second ball bearing 10. The bearing retainer ring 12 is interference-fitted with the shaft hole 901.

[0020] When the aforementioned silent, long-life diaphragm air pump is working, the motor first drives the eccentric wheel to rotate, which in turn drives the swing arm to rotate, and the swing arm in turn drives the piston cup to move up and down. When the piston cup is stretched downward, a vacuum chamber is created, causing the inlet valve to open and the outlet valve to close, allowing external airflow to reach the inside of the piston cup through the inlet valve. When the piston cup is compressed upward, the inlet valve to close and the outlet valve to open, allowing internal airflow to reach the outside of the piston cup through the outlet valve. Since the eccentric wheel is connected to the swing arm through an eccentric shaft, one end of the eccentric shaft is connected to the eccentric wheel, and the other end of the eccentric shaft is respectively fitted with a first ball bearing, a second ball bearing, and a bearing retainer ring, and the first ball bearing, the second ball bearing, and the bearing retainer ring are all located inside the shaft hole, the eccentric wheel can drive the swing arm to rotate through the eccentric shaft. The eccentric shaft and the first and second ball bearings are all rolling connections, which can reduce the friction and wear of the eccentric shaft, extend the service life of the eccentric shaft, and maintain the stability of flow and pressure throughout the life cycle of the air pump.

[0021] The eccentric wheel 15 includes a first connecting hole 1501 that mates with the eccentric shaft 13. An abutment surface 1502 is provided on the outer side of the first connecting hole 1501, and the abutment surface 1502 abuts against the end of the inner ring of the first ball bearing 11. The eccentric shaft 13 can be interference-fitted or tight-fitted with the first connecting hole 1501 to enhance the connection stability between the eccentric shaft 13 and the eccentric wheel 15. Because the abutment surface 1502 abuts against the end of the inner ring of the first ball bearing 11, a rolling friction connection is formed between the eccentric wheel 15 and the rocker arm 9. Compared with the traditional sliding friction structure, this reduces wear, frictional heat generation, and plastic deformation, thus improving product lifespan and stability.

[0022] The housing includes an upper cover 2, a cup holder 8, a base 14, and a motor holder 19. The upper cover 2 is connected to the cup holder 8, the cup holder 8 is connected to the base 14, the base 14 is connected to the motor holder 19, and the motor holder 19 is connected to the motor 20 by fixing screws 17. The motor holder 19 is provided with a first air intake 1901, a second air intake 1902, and a first buffer air intake 1903. The first buffer air intake 1903 is connected to the first air intake 1901 and the second air intake 1902, respectively. The upper cover 2 is provided with an air outlet 201 and a second buffer air intake 202 connected to the air outlet 201.

[0023] By setting the first air intake duct 1901 and the second air intake duct 1902, the silent long-life diaphragm air pump can form a dual air intake structure, thereby dispersing the airflow and reducing the impact noise generated by the concentrated airflow. Furthermore, the length of the first buffer air duct 1903 is greater than the length of the first air intake duct 1901 and the second air intake duct 1902, thereby forming an enlarged volume cavity inside the motor mounting base 19, thereby extending the airflow path and generating airflow buffering within the volume cavity.

[0024] The first buffer air passage 1903 is provided with a first sound-absorbing cotton 18 that cooperates with the first air intake passage 1901 and the second air intake passage 1902. The first sound-absorbing cotton 18 is interference-fitted with the motor mounting base 19. The second buffer air passage 202 is provided with a second sound-absorbing cotton 3 that cooperates with the air outlet passage 201. The second sound-absorbing cotton 3 is interference-fitted with the upper cover 2.

[0025] By incorporating the first sound-absorbing cotton 18, the intake airflow can be differentiated and attenuated after passing through the tiny pores of the first sound-absorbing cotton 18, thereby reducing the noise from rapid airflow and further reducing the direct leakage of airflow noise. By incorporating the second sound-absorbing cotton 3, the exhaust airflow can be differentiated and attenuated after passing through the tiny pores of the second sound-absorbing cotton 3, thereby reducing the noise from rapid airflow and further reducing the direct leakage of airflow noise.

[0026] The eccentric wheel 15 also includes a second connecting hole 1503 and a third connecting hole 1504. The eccentric wheel 15 is connected to the output shaft of the motor 20 through the second connecting hole 1503, and the eccentric wheel 15 is connected to the counterweight 16 through the third connecting hole 1504. The counterweight 16 is provided with a protrusion that matches the third connecting hole 1504.

[0027] By providing the second connecting hole 1503, the output shaft of the motor 20 can be connected to the second connecting hole 1503 with an interference fit, thereby improving the connection stability between the motor 20 and the eccentric wheel 15. By providing the third connecting hole 1504 and the counterweight 16, the vibration of the eccentric wheel 15 can be reduced, thereby reducing the shaking and oscillation noise caused by vibration.

[0028] The swing arm 9 is provided with a mounting hole 902, through which the cup 7 is connected. The cup fixing seat 8 is structurally matched with the cup 7. By providing the cup fixing seat 8, the cup 7 can be supported and fixed. By providing the mounting hole 902, the cup 7 can be firmly installed on the swing arm 9.

[0029] The silent, long-life diaphragm air pump also includes a valve plate mounting base 5, on which the inlet valve plate 6 and the outlet valve plate 4 are both mounted. By setting the valve plate mounting base 5, the inlet valve plate 6 and the outlet valve plate 4 can be fixed and supported.

[0030] The upper cover 2, the cup holder 8, the base 14, and the motor holder 19 are fixed together by the pump body fixing spring 1. By setting the pump body fixing spring 1, the upper cover 2, the cup holder 8, the base 14, and the motor holder 19 are fixed together, thereby making the overall structure of the silent long-life diaphragm air pump more stable.

[0031] The bearing retaining ring 12 is provided with a protrusion 1201, and the bearing retaining ring 12 is interference-fitted with the shaft hole 901 through the protrusion 1201. The protrusion 1201 is provided to facilitate the installation of the bearing retaining ring 12.

[0032] This utility model also discloses a method for operating the aforementioned silent, long-life diaphragm air pump, comprising: controlling the motor 20 to rotate, which in turn drives the eccentric wheel 15 to rotate, which in turn drives the swing arm 9 to rotate, which in turn drives the cup 7 to move up and down. When the cup 7 is stretched downwards, a vacuum chamber is created, causing the inlet valve 6 to open and the outlet valve 4 to close, allowing external airflow to reach the inside of the cup 7 through the inlet valve 6. When the cup 7 is compressed upwards, the inlet valve 6 is closed and the outlet valve 4 is opened, allowing internal airflow to reach the outside of the cup 7 through the outlet valve 4.

[0033] Because the eccentric wheel is connected to the swing arm via an eccentric shaft, with one end of the shaft connected to the eccentric wheel and the other end fitted with a first ball bearing, a second ball bearing, and a bearing retainer ring, all housed within the shaft hole, the eccentric wheel can drive the swing arm to rotate via the eccentric shaft. The eccentric shaft, the first ball bearing, and the second ball bearing are all rolling connections, which reduces friction and wear on the eccentric shaft, extends its service life, and maintains the stability of flow and pressure throughout the pump's lifespan. It can be seen that this quiet, long-life diaphragm air pump has lower noise and a longer service life. This quiet, long-life diaphragm air pump can be used in home massage, car lumbar supports, massage devices, aromatherapy systems, and medical devices. This quiet, long-life diaphragm air pump does not require significant modifications to existing diaphragm air pumps, which facilitates its widespread application.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A silent, long-life diaphragm air pump, characterized in that, include: The system comprises a housing, a motor, an eccentric wheel connected to the motor, a swing arm connected to the eccentric wheel, and a diaphragm connected to the swing arm. The diaphragm is equipped with an exhaust valve and an intake valve. The exhaust valve is used to cooperate with the exhaust of the diaphragm, and the intake valve is used to cooperate with the intake of the diaphragm. The eccentric wheel, the swing arm, the diaphragm, the exhaust valve, and the intake valve are all located inside the housing, while the motor is located outside the housing. The eccentric wheel is connected to the rocker arm via an eccentric shaft. One end of the eccentric shaft is connected to the eccentric wheel, and the other end of the eccentric shaft is respectively fitted with a first ball bearing, a second ball bearing, and a bearing retainer. The rocker arm has a shaft hole, and the first ball bearing, the second ball bearing, and the bearing retainer are all disposed inside the shaft hole. The bearing retainer is connected to the first ball bearing, the first ball bearing is connected to the second ball bearing, and the bearing retainer is interference-fitted with the shaft hole.

2. The silent, long-life diaphragm air pump according to claim 1, characterized in that, The eccentric wheel includes a first connecting hole that mates with the eccentric shaft. The outer side of the first connecting hole is provided with an abutment surface, which abuts against the end of the inner ring of the first ball bearing.

3. The silent, long-life diaphragm air pump according to claim 2, characterized in that, The housing includes a top cover, a cup holder, a base, and a motor mounting bracket. The top cover is connected to the cup holder, the cup holder is connected to the base, the base is connected to the motor mounting bracket, and the motor mounting bracket is connected to the motor via fixing screws. The motor mounting base is provided with a first air inlet, a second air inlet, and a first buffer air inlet, and the first buffer air inlet is connected to the first air inlet and the second air inlet respectively; The upper cover is provided with an air outlet and a second buffer air outlet connected to the air outlet.

4. The silent, long-life diaphragm air pump according to claim 3, characterized in that, The first buffer air passage is provided with a first sound-absorbing cotton that cooperates with the first air intake passage and the second air intake passage. The first sound-absorbing cotton is interference-fitted with the motor mounting base. The second buffer air passage is provided with a second sound-absorbing cotton that matches the air outlet passage, and the second sound-absorbing cotton is connected to the upper cover with an interference fit.

5. The silent, long-life diaphragm air pump according to claim 4, characterized in that, The eccentric wheel also includes a second connecting hole and a third connecting hole. The eccentric wheel is connected to the output shaft of the motor through the second connecting hole, and the eccentric wheel is connected to the counterweight through the third connecting hole. The counterweight is provided with a protrusion that mates with the third connecting hole.

6. The silent, long-life diaphragm air pump according to claim 5, characterized in that, The swing arm is provided with a mounting hole, and the swing arm is connected to the leather cup through the mounting hole. The leather cup fixing seat is matched with the structure of the leather cup.

7. The silent, long-life diaphragm air pump according to claim 6, characterized in that, It also includes a valve plate mounting base, on which both the intake valve plate and the outlet valve plate are mounted.

8. The silent, long-life diaphragm air pump according to claim 7, characterized in that, The top cover, the leather cup fixing seat, the base and the motor fixing seat are fixed together by the pump body fixing spring.

9. The silent, long-life diaphragm air pump according to claim 8, characterized in that, The bearing retaining ring is provided with a protrusion, and the bearing retaining ring is connected to the shaft hole by interference fit through the protrusion.

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