An electric inflator pump movement

Abstract

The application relates to the technical field of air pumps, in particular to an electric air pump core, which comprises a cylinder and a motor, the cylinder comprises a cylinder body, the cylinder body is provided with an air inlet hole and an air outlet hole at the tail end, the motor is connected with a piston through a transmission structure, the piston head of the piston can be driven to make reciprocating motion in the cylinder body, the cylinder body is internally provided with a movable air valve plate between the air inlet hole and the piston head, the air valve plate makes opening and closing motion to the air inlet hole along with the motion of the piston head. The application effectively solves the technical problems of low air inlet efficiency and poor heat dissipation of the air pump in the prior art.

Description

Technical Field

[0001] This application relates to the field of air pump technology, and in particular to an electric air pump mechanism. Background Technology

[0002] Air pumps, as a common fluid transport device, are widely used in the inflation of car tires, air mattresses, inflatable toys, and various sports equipment. Their core working principle typically relies on a motor driving a piston to reciprocate within a cylinder. A one-way valve at one end of the cylinder controls the intake and exhaust of gas, thus achieving continuous inflation.

[0003] In traditional electric air pump designs, the air intake passage is typically located on the side wall of the piston or cylinder. Specifically, when the piston moves backward, a negative pressure is created inside the cylinder, and external air is drawn into the cylinder through the air intake port on the piston or cylinder wall. When the piston moves forward, the air intake port is closed, the air inside the cylinder is compressed, and the pressure increases, thereby opening the one-way valve (such as an umbrella valve or a plate valve) located at the air outlet at the end of the cylinder, expelling the compressed air. Although this structure is simple and widely used, it has some inherent technical drawbacks.

[0004] First, the intake path is long and may not be smooth enough. When the intake port is located on the piston or cylinder side wall, air needs to take a long detour to enter the cylinder compression chamber. This will increase intake resistance to some extent and reduce intake efficiency. Especially under high-frequency reciprocating motion, insufficient intake will directly affect the overall flow and efficiency of the pump.

[0005] Secondly, the traditional structure is prone to heat accumulation. Since the main power and compression processes are concentrated at the end of the cylinder, while the air intake is on the side, the heat from the compressed, high-temperature gas is continuously conducted to the cylinder head before being discharged, causing a rapid increase in temperature in that area. Prolonged high-temperature operation not only accelerates the aging of seals and affects the pump's lifespan, but also may affect the precision of the fit between components due to thermal expansion and contraction, leading to performance degradation.

[0006] In addition, some designs employ complex multi-valve or external cooling structures to improve heat dissipation or efficiency, but this increases the number of parts, manufacturing costs, and the risk of failure.

[0007] Therefore, there is an urgent need in this field for a new type of air pump structure that can optimize airflow path, improve inflation efficiency and enhance heat dissipation performance. Utility Model Content

[0008] This application provides an electric air pump mechanism to at least solve the technical problems of low air intake efficiency and poor heat dissipation in related technologies.

[0009] To achieve the above objectives, this application provides an electric air pump mechanism, including a cylinder and a motor. The cylinder includes a cylinder body, with an air inlet and an air outlet formed at the end of the cylinder body. The motor is connected to a piston through a transmission structure and can drive the piston head of the piston to reciprocate within the cylinder body. A movable air valve is provided inside the cylinder body between the air inlet and the piston head, and the air valve moves with the piston head to open and close the air inlet.

[0010] In some embodiments, the valve plate is made of a flexible material and moves with the air pressure changes caused by the movement of the piston head.

[0011] In some embodiments, the valve plate is fixed to the inner end of the cylinder and has a movable part that extends to the air inlet and covers or blocks the air inlet. The movable part opens and closes as the piston head moves.

[0012] In some embodiments, a protruding positioning post is formed at the end of the cylinder block, and a positioning hole is formed on the valve plate to cooperate with the positioning post for installation.

[0013] In some embodiments, the positioning hole is located on the side away from the moving part.

[0014] In some embodiments, the valve plate has an annular structure and a hollowed-out area that avoids the air outlet, and the movable part extends from the edge of the annular ring toward the inside of the annular ring.

[0015] In some embodiments, the valve plate is made of a flexible metal sheet that can deform.

[0016] In some embodiments, a V-shaped sealing ring is fitted around the piston head.

[0017] In some embodiments, the cylinder body is provided with a conical groove that mates with the air outlet and a conical one-way valve that matches the air outlet. The one-way valve is movably accommodated in the conical groove. An elastic element abuts against the one-way valve in the direction away from the air outlet. The elastic element gives the one-way valve a tendency to be pushed open by the airflow from the air outlet and then reset.

[0018] In some embodiments, the cylinder is provided with a connecting portion extending toward the motor, the motor is fixedly connected to a connecting frame, the connecting portion is fixedly connected to the connecting frame, the transmission structure includes a transmission gear disposed on the connecting portion, the piston rod end of the piston is eccentrically and rotatably connected to the transmission gear, and the motor is provided with a first output end for driving the transmission gear.

[0019] Based on the above, the advantages of this application's technical solution compared to the prior art are:

[0020] 1. Optimize airflow path and improve intake efficiency: By setting an intake port directly at the end of the cylinder and cooperating with a movable valve plate, the intake channel is minimized. When the piston returns, a negative pressure is formed in the cylinder, and external air can be quickly drawn in directly from the intake port at the end of the cylinder, which greatly reduces intake resistance and flow loss, allowing the cylinder to be filled with air in a short time, thereby significantly improving the volumetric efficiency and overall flow of the air pump.

[0021] 2. Improved heat dissipation and extended product lifespan: The air intake port at the end of the cylinder not only serves as an intake port but also forms a natural "cooling air duct." During the intake process, ambient temperature air is directly drawn into the cylinder head (i.e., the high-temperature area). This process effectively provides forced convection cooling to the cylinder head, carrying away the large amount of heat generated during compression. This built-in cooling mechanism effectively reduces the operating temperature of the mechanism, slows down the aging of components, and improves product reliability and lifespan.

[0022] 3. Compact structure and stable performance: This design cleverly integrates the intake function and the valve plate at the end of the cylinder, eliminating the need for complex intake structures on the piston or cylinder sidewall. This makes the overall structure more compact and reasonable. The valve plate automatically opens and closes under air pressure, responds quickly, and seals reliably, ensuring the stable realization of the one-way intake function and avoiding potential failure points caused by structural complexity.

[0023] 4. Simplified design and reduced costs: Compared with solutions that use additional cooling devices or complex multi-valve systems, this application achieves the dual purpose of efficient air intake and good heat dissipation through ingenious structural innovation on the cylinder, reducing the number of parts, lowering material costs and assembly complexity, and thus having good economic benefits. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0026] Figure 2 This is an exploded view of an embodiment of this application;

[0027] Figure 3 This is a cross-sectional view of an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the cylinder interior and valve plate cooperation in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of the air valve plate in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: Motor 1; First output end 1.1; Second output end 1.2; Intake fan 1.3; Cylinder body 2.1; Connecting part 2.2; First connection port 2.3; Second connection port 2.4; Air outlet 2.5; One-way valve 2.6; Elastic element 2.7; Positioning pin 2.8; Pressure sensor 2.9; Connecting bracket 3; Piston head 4.1; Piston rod 4.2; Sealing ring 4.3; Valve plate 5; Positioning hole 5.1; Moving part 5.2; Airtight element 6; Air pipe 7; Transmission gear 8; Air inlet 9. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, modifications to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0032] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0033] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application means two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The terms “first,” “second,” “third,” etc., used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0034] This application provides an electric air pump mechanism, including a cylinder and a motor. The cylinder includes a cylinder body with an air inlet and an air outlet at the end. The motor is connected to a piston through a transmission structure and can drive the piston head to reciprocate within the cylinder body. A movable valve plate is provided inside the cylinder body between the air inlet and the piston head. The valve plate opens and closes the air inlet as the piston head moves.

[0035] Implementation, for example Figures 1-5 As shown, an electric air pump mechanism includes a cylinder, a piston, and a motor 1. The cylinder includes a cylinder body 2.1, a first connection port 2.3 located at the end of the cylinder body 2.1, and a connecting portion 2.2 extending toward the motor 1. The motor 1 is fixedly connected to a connecting frame 3, and the connecting portion 2.2 is fixedly connected to the connecting frame 3, so that the motor 1 is fixedly connected to the lower end of the cylinder. An air outlet 2.5 and an air inlet 9 are formed at the end of the cylinder body 2.1. The air outlet 2.5 communicates with the first connection port 2.3 and the cylinder body 2.1, allowing gas inside the cylinder body 2.1 to be output from the first connection port 2.3; the air inlet 9 communicates with the outside of the cylinder body 2.1, allowing external gas to be introduced into the cylinder body 2.1. The motor 1 is connected to the piston through a transmission structure. After the motor 1 is started, it can drive the piston head 4.1 to reciprocate within the cylinder 2.1. The outer edge of the piston head 4.1 is fitted with a V-shaped sealing ring 4.3 that fits tightly with the inner wall of the cylinder to ensure airtightness during operation.

[0036] Furthermore, a movable valve plate 5 is disposed inside the cylinder 2.1 between the air intake port 9 and the piston head 4.1. The valve plate is fixed to the end region inside the cylinder 2.1 and covers or seals the air intake port 9. The valve plate 5 is made of a flexible metal material that can deform. The valve plate 5 has an annular structure and forms a hollow area to avoid the air outlet port 2.5. A movable part 5.2 extends from the edge of the annulus towards the inside of the annulus and extends to the air intake port 9, covering or sealing the air intake port 9. When motor 1 drives the piston to move toward the outlet 2.5, the valve plate 5, under the action of air pressure, causes the movable part 5.2 to press against the inlet 9 and seal the inlet 9, and the gas is pushed out by the piston from the outlet 2.5; when motor 1 drives the piston to move away from the outlet 2.5, the movable part 5.2 of the valve plate 5, under the action of air pressure, lifts and opens the inlet 9, and the gas enters the cylinder 2.1 from the inlet 9. The movable part 5.2 of the valve plate 5 opens and closes with the reciprocating process of the piston head 4.1 and replenishes the gas in the cylinder 2.1 from the outside.

[0037] Furthermore, a protruding positioning post 2.8 is formed at the end of the cylinder body 2.1 to position the valve plate 5. A positioning hole 5.1 is formed on the valve plate 5 to mate with the positioning post 2.8. The positioning post 2.8 and the positioning hole 5.1 are used to accurately position the valve plate 5 on the piston head 4.1 to prevent displacement. The positioning hole 5.1 is located on the side away from the moving part 5.2 so that the valve plate 5 can be evenly stressed when the moving part 5.2 moves, preventing it from falling off on one side.

[0038] Furthermore, an airtight component 6 is connected to the end of the first connection port 2.3, and the airtight component 6 is connected to the air pipe 7. A movable conical one-way valve 2.6 is provided inside the first connection port 2.3. An elastic component 2.7 (in this embodiment, a spring) is provided at the end of the one-way valve 2.6 away from the air outlet 2.5 to make the one-way valve 2.6 press against the air outlet 2.5. A conical groove is provided outside the air outlet 2.5 inside the first connection port 2.3, which fits tightly with the conical end of the one-way valve 2.6. The conical groove and the one-way valve 2.6 cooperate to enhance the airtightness at the air outlet 2.5. The elastic component 2.7 makes the one-way valve 2.6 tend to be pushed open by the airflow of the air outlet 2.5 and then reset. When the airflow is forced out of the outlet 2.5 by the piston, the airflow pushes open the one-way valve 2.6 and flows into the air pipe 7. When no airflow flows out of the outlet 2.5, the one-way valve 2.6 is pressed against the outlet 2.5 by the elastic element 2.7 to prevent the gas in the air pipe 7 from flowing back.

[0039] Furthermore, the transmission structure includes a transmission gear 8 mounted on the cylinder connection portion 2.2, and a motor 1 having a first output end 1.1 for driving the transmission gear 8 (specifically, the first output end 1.1 is connected to a gear meshing with the transmission gear 8). The piston rod 4.2 of the piston is eccentrically and rotatably connected to the transmission gear 8 at its end. When the motor 1 starts, it drives the transmission gear 8 to rotate, and the transmission gear 8 drives the piston rod 4.2 to reciprocate.

[0040] Furthermore, the motor 1 has a second output terminal 1.2 located away from the cylinder, and an intake fan 1.3 is connected to the second output terminal 1.2.

[0041] Furthermore, a second connection port 2.4 is provided on the side wall of the first connection port 2.3, and a pressure sensor 2.9 is provided at the second connection port 2.4. The pressure sensor 2.9 is tightly fitted with the second air outlet and electrically connected to the control circuit board. The pressure sensor 2.9 can monitor the pressure status of the first connection port 2.3 and the second connection port 2.4 in real time during inflation to prevent the inflated object from being over-inflated.

[0042] Those skilled in the art should understand that 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 have been 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.

[0043] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electric air pump mechanism, characterized in that: The device includes a cylinder and a motor. The cylinder includes a cylinder body with an air inlet and an air outlet at the end. The motor is connected to a piston via a transmission structure and can drive the piston head of the piston to reciprocate within the cylinder body. A movable valve plate is provided inside the cylinder body between the air inlet and the piston head. The valve plate opens and closes the air inlet as the piston head moves.

2. The electric air pump mechanism according to claim 1, characterized in that: The valve plate is made of a flexible material and moves with the air pressure changes caused by the movement of the piston head.

3. The electric air pump mechanism according to claim 2, characterized in that: The valve plate is fixed to the inner end of the cylinder and has a movable part. The movable part extends to the air inlet and covers or blocks the air inlet. The movable part opens and closes as the piston head moves.

4. The electric air pump mechanism according to claim 3, characterized in that: The cylinder body has a protruding positioning post at the end, and the valve plate has a positioning hole that mates with the positioning post for installation.

5. The electric air pump mechanism according to claim 4, characterized in that: The positioning hole is located on the side away from the movable part.

6. The electric air pump mechanism according to claim 3, characterized in that: The valve plate has a ring structure and a hollow area that avoids the air outlet. The movable part extends from the edge of the ring towards the inside of the ring.

7. The electric air pump mechanism according to claim 6, characterized in that: The valve plate is made of a flexible metal sheet that can deform.

8. An electric air pump mechanism according to any one of claims 1 to 7, characterized in that: A V-shaped sealing ring is fitted around the piston head.

9. An electric air pump mechanism according to any one of claims 1 to 7, characterized in that: The cylinder body is provided with a conical groove that mates with the air outlet and a conical one-way valve that matches the air outlet. The one-way valve is movably accommodated in the conical groove. An elastic element abuts against the one-way valve in the direction away from the air outlet. The elastic element gives the one-way valve a tendency to be pushed open by the airflow from the air outlet and then reset.

10. An electric air pump mechanism according to any one of claims 1 to 7, characterized in that: The cylinder is provided with a connecting part extending toward the motor, the motor is fixedly connected to a connecting frame, the connecting part is fixedly connected to the connecting frame, the transmission structure includes a transmission gear provided on the connecting part, the piston rod end of the piston is eccentrically and rotatably connected to the transmission gear, and the motor is provided with a first output end for driving the transmission gear.

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