A bidirectional air pump drive mechanism and a bidirectional air pump

Abstract

This utility model discloses a two-way air pump and its driving mechanism. The driving mechanism includes a drive handle, a piston rod, and a piston unit. The piston rod is a hollow, cylindrical structure, with two independent gas channels formed internally by a partition, resulting in high airflow efficiency. A first sealing element is provided at the connection between the piston rod and the drive handle. This sealing element is cylindrical and has two independent through holes that match the internal structure of the piston rod. A gap is provided between the through holes for the partition to be inserted and tightly fitted. This design achieves a threadless, tight-sealed connection, with a simple structure, reliable sealing, and convenient assembly. This utility model effectively improves the performance and reliability of the air pump.

Description

Technical Field

[0001] This utility model relates to the field of inflation device technology, and in particular to a bidirectional air pump drive mechanism and a bidirectional air pump including the drive mechanism. Background Technology

[0002] A two-way air pump inflates during both the upward and downward strokes of its piston rod, resulting in higher inflation efficiency than a one-way air pump. Existing two-way air pumps (e.g., the utility model patent with authorization publication number CN207297258U) achieve two-way inflation, but their piston rods typically employ an inner and outer sleeve structure, or use complex connection methods such as threads between the piston rod and the drive handle. These structures may suffer from problems such as high airflow resistance, cumbersome connection steps, reliance on thread precision and preload for sealing, and a tendency to loosen or leak after prolonged use. Therefore, there is an urgent need in the field for a drive mechanism with higher airflow efficiency, more reliable connection, and superior sealing performance. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a bidirectional air pump drive mechanism that is simple in structure, reliable in sealing, and easy to assemble, as well as a bidirectional air pump that includes the mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bidirectional air pump drive mechanism includes a drive handle, a piston rod connected to the drive handle, and a piston unit disposed at the lower end of the piston rod. The piston rod is a hollow cylindrical structure, and its interior is divided into two independent gas channels by an axially extending partition. A first sealing element is provided at the connection between the piston rod and the drive handle. The first sealing element is a cylindrical structure, and its interior has two independent through holes adapted to the cross-section of the piston rod end, and a gap is provided between the two independent through holes for the partition to be inserted and tightly fitted.

[0006] Preferably, the first seal is made of an elastic material, and its outer wall is interference-fitted with the mounting hole of the drive handle.

[0007] Preferably, a second seal is provided at the connection between the piston rod and the piston unit, and the structure of the second seal is the same as that of the first seal.

[0008] Preferably, the piston unit includes a piston body, and the piston body is provided with a first valve chamber and a second valve chamber that are respectively connected to the two gas passages of the piston rod.

[0009] Preferably, the drive handle is provided with an exhaust pipe that communicates with one of the gas passages of the piston rod.

[0010] Preferably, the piston rod is made of metal, and the piston rod is fixed to the drive handle and the piston unit by rivets.

[0011] A bidirectional air pump has a bidirectional air pump drive mechanism as described above.

[0012] This utility model has the following beneficial effects:

[0013] 1. High ventilation efficiency: The piston rod has two independent gas channels formed by the partition, which effectively increases the ventilation cross-sectional area and reduces airflow resistance, thereby improving the air pumping efficiency.

[0014] 2. Excellent sealing performance: Through the design of the first and second sealing elements, and by utilizing the interference fit of elastic materials and the tight engagement of the gap and the partition, a reliable static seal is formed at the connection between the piston rod and the drive handle and piston unit, effectively preventing gas leakage.

[0015] 3. Simplified structure and convenient assembly: The unique sealing design realizes a threadless connection between the piston rod, the drive handle and the piston unit. It only needs to be inserted and fixed, which greatly simplifies the assembly process and improves production efficiency and assembly consistency.

[0016] 4. Secure connection: Based on the sealing and alignment achieved through sealing components, mechanical fixing methods such as riveting can be further used to ensure the structural strength of the connection and the reliability of long-term use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural assembly diagram of the bidirectional air pump drive mechanism of this utility model.

[0018] Figure 2 This is an exploded three-dimensional structural diagram of the bidirectional air pump drive mechanism of this utility model.

[0019] Figure 3 This is a cross-sectional view of the bidirectional air pump drive mechanism of this utility model.

[0020] Legend: 1. Drive handle; 11. Air outlet pipe; 2. Piston rod; 21. Baffle plate; 22. First seal; 3. Piston unit; 31. Second seal; 32. First valve chamber; 33. Second valve chamber; Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1 to 3 This embodiment provides a bidirectional air pump drive mechanism and a bidirectional air pump including the mechanism.

[0023] The bidirectional air pump drive mechanism includes a drive handle 1, a piston rod 2, and a piston unit 3.

[0024] The piston rod 2 is a hollow cylindrical structure, preferably made of metal to ensure structural strength. Its interior is divided into two completely independent gas channels by an axially extending partition 21.

[0025] A first sealing element 22 is provided at the connection between the piston rod 2 and the drive handle 1. This first sealing element 22 is made of an elastic material (such as rubber or silicone) and is cylindrical. It has two independent through holes inside that are adapted to the end face structure of the piston rod 2, and a gap is provided between these two through holes for the partition plate 21 to be inserted and tightly fitted. During assembly, the outer wall of the first sealing element 22 is interference-fitted with the mounting hole of the drive handle 1, thereby achieving a threadless and tight sealing connection. To further ensure the connection strength, the piston rod 2 and the drive handle 1 can also be fixed together by rivets.

[0026] Similarly, a second seal 31 is provided at the connection between the piston rod 2 and the piston unit 3. The structure of the second seal 31 is the same as that of the first seal 22, ensuring the sealing reliability of the lower end of the piston. The piston unit 3 includes a piston body, which has a first valve chamber 32 and a second valve chamber 33 that are respectively connected to two gas passages of the piston rod 2. The airflow direction is controlled by the built-in valve seat to realize the bidirectional air pumping function.

[0027] The drive handle 1 is provided with an air outlet section 11, which is connected to one of the gas channels of the piston rod 2 and is used to connect the inflation tube and inflate the object to be inflated.

[0028] A two-way air pump has the drive mechanism described above in this utility model. Other components required for the air pump are based on the same principle as those in the prior art and are not within the scope of protection of this patent. Therefore, they will not be described in detail in this case.

[0029] Through the above design, this utility model achieves a two-way air pumping function with large air volume, high efficiency, and high reliability.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bidirectional air pump drive mechanism, comprising a drive handle (1), a piston rod (2) connected to the drive handle (1), and a piston unit (3) disposed at the lower end of the piston rod (2); characterized in that: The piston rod (2) is a hollow cylindrical structure, and its interior is divided into two independent gas channels by a partition (21) extending axially. A first sealing element (22) is provided at the connection between the piston rod (2) and the drive handle (1). The first sealing element (22) is a cylindrical structure, and its interior has two independent through holes that are adapted to the cross-section of the end of the piston rod (2). A gap is provided between the two independent through holes for the partition (21) to be inserted and tightly fitted. The first sealing element (22) is made of elastic material, and its outer wall is interference-fitted with the mounting hole of the drive handle (1). A second sealing element (31) is provided at the connection between the piston rod (2) and the piston unit (3). The structure of the second sealing element (31) is the same as that of the first sealing element (22).

2. The bidirectional air pump drive mechanism according to claim 1, characterized in that: The piston unit (3) includes a piston body, and a first valve chamber (32) and a second valve chamber (33) are respectively connected to the two gas passages of the piston rod (2).

3. The bidirectional air pump drive mechanism according to claim 2, characterized in that: The drive handle (1) is provided with an exhaust pipe (11) that communicates with one of the gas passages of the piston rod (2).

4. The bidirectional air pump drive mechanism according to claim 3, characterized in that: The piston rod (2) is made of metal and is fixed to the drive handle (1) and piston unit (3) by rivets.

5. A two-way air pump, characterized in that: It has a bidirectional air pump drive mechanism as described in any one of claims 1-4.

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