Air pump with integrated air inlet and outlet valve

Abstract

An air pump with an integrated air inlet and outlet valve comprises an air cylinder (1), a piston (2) arranged in the air cylinder (1), an air outlet pipeline (3), an air inlet valve (4) and an air outlet valve (5). The air inlet valve (4) and the air outlet valve (5) are made of elastic materials and are integrally arranged at the bottom of the air cylinder (1). The air outlet valve (5) is provided with an upper opening (51) which is large in width and is opened in a natural state and a lower opening (52) which is small in width and is closed in a natural state, the upper opening (51) is opposite to an inner cavity of the air cylinder (1), and the lower opening (52) is opposite to the air outlet pipeline (3); and an air inlet hole (11) corresponding to the air inlet valve (4) in position is formed in the bottom of the air cylinder (1). The air pump can effectively reduce the temperature in the pump during air inflation and the risk of damage in the using process, and is simpler in structure, easy to assemble, small in size and convenient to carry.

Description

Technical Field

[0001] The utility model relates to an air charging device, in particular to an air charging pump with an air outlet valve and an air inlet valve integrated therein, which is suitable for various types of air pumps. Background Art

[0002] In the existing air pumps, the air intake and air outlet structures are separate. The air intake is achieved by opening and closing the air inlet valve on the piston, and the air outlet is achieved by opening and closing the air outlet valve in the cylinder. In order to prevent the piston from retreating and quickly closing the air inlet hole to prevent air leakage during re-inflation, the valves of the air pumps are provided with springs for closing the valves. The disadvantage of this structure is that during the inflation process, the spring has a certain elastic force (resistance), which will affect the effect of the valve opening. When the air passes through the small hole, a certain temperature will be generated, and the temperature in the movement will rise very quickly, which can easily cause damage to the air pump. At the same time, this structure is complex and has many assembly processes, which can easily cause parts to be missed during the production process, resulting in an increase in the defective rate of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an air pump in which an air outlet valve and an air inlet valve are integrally arranged and a spring-sealed valve is not required.

[0004] The technical solution adopted by the utility model to solve the above technical problems is to design and manufacture an air pump with integrated air inlet and outlet valves, including: a cylinder, a piston arranged in the cylinder, an air outlet pipeline, an air inlet valve and an air outlet valve;

[0005] The inlet valve and the outlet valve are made of elastic material and are integrally arranged at the bottom of the cylinder; the outlet valve has an upper opening with a larger width and open in a natural state and a lower opening with a smaller width and closed in a natural state, the upper opening is opposite to the cylinder cavity, and the lower opening is opposite to the outlet pipe; the bottom of the cylinder is provided with an inlet hole corresponding to the position of the inlet valve;

[0006] When the piston is pushed backward, the lower opening of the outlet valve is closed and external gas enters from the air inlet hole to push open the air inlet valve and enter the cylinder cavity along the gap between the air inlet valve and the cylinder wall; when the piston is pushed forward, the air inlet valve presses and closes the air inlet hole, and the gas in the cylinder cavity pushes open the lower opening of the outlet valve and enters the air outlet pipe.

[0007] The air inlet valve and the air outlet valve are made of silicone material and are integrally formed.

[0008] The upper opening of the air outlet valve is elliptical, and the lower opening is a straight line segment in a natural state. The lower part of the air outlet valve is flat.

[0009] The air inlet valves are provided with two and are respectively located on the left and right sides of the upper part of the air outlet valve. The air inlet valve is thinner on the inner side connected with the air outlet valve and thicker on the outer side.

[0010] A positioning ring is fixedly arranged in the cylinder and is located above the gas outlet valve. A circle of first positioning grooves is arranged at the bottom of the positioning ring. A circle of top edge extends upward from the top of the gas outlet valve and is embedded in the first positioning groove.

[0011] The bottom of the cylinder is provided with a lower recessed position that matches the peripheral shape of the air inlet valve, the upper part of the air outlet valve and the positioning ring. The air inlet valve, the upper part of the air outlet valve and the positioning ring are embedded in the lower recessed position, and a gap is left between the air inlet valve and the wall of the lower recessed position.

[0012] The upper part of the air outlet valve is provided with a circle of bottom edge extending downward, and the bottom surface of the lower recess is provided with a circle of second positioning grooves, and the bottom edge is embedded in the second positioning grooves.

[0013] A lug is integrally provided on the side surface of the positioning ring, and a vertical through hole is opened on the lug, and the vertical through hole corresponds vertically to the position of the air inlet valve.

[0014] The air pump with integrated air inlet and outlet valves of the utility model designs the air inlet and air outlet structures on the same valve in the cylinder, and realizes the air inlet and air outlet of the air pump by opening and closing the air outlet valve, thereby improving the inflation effect; this air outlet valve is made of an elastic material, and can be opened and closed freely when subjected to air pressure, thereby achieving the effect of self-sealing after air intake. Compared with the prior art, the utility model has the following advantages: 1. It can effectively reduce the temperature inside the air pump and reduce the risk of damage to the air pump during use; 2. The air inlet and air outlet structures are designed as an integrated type, which reduces the number of assembled parts and components, improves production efficiency, and reduces the defective rate generated during assembly; it has the characteristics of simple production operation, simple process, and easy replacement of parts and maintenance, which solves the problem of complex assembly and cumbersome process of existing air pumps on the market; 3. Compared with previous air pumps, it has the characteristics of small size and easy carrying, and is more compatible during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional view of the air pump with integrated air inlet and outlet valves of the utility model when the piston is pushed backward;

[0016] Figure 2 for Figure 1 Schematic diagram of gas flow direction at A in the middle;

[0017] Figure 3 It is a partial cross-sectional view of the air pump with integrated air inlet and outlet valves of the utility model when the piston is pushed forward;

[0018] Figure 4 for Figure 3 Schematic diagram of gas flow direction at B in the middle;

[0019] Figure 5 is a three-dimensional schematic diagram of the air inlet valve and the air outlet valve viewed from the bottom;

[0020] Figure 6 is a three-dimensional schematic diagram of the air inlet valve and the air outlet valve viewed from the top;

[0021] Figure 7 A vertical cross-sectional view of the air inlet valve and the air outlet valve along a direction perpendicular to the lower opening thereof;

[0022] Figure 8 It is a vertical cross-sectional view of the bottom of the cylinder at the valve and the positioning ring. DETAILED DESCRIPTION

[0023] The following is a further detailed description in conjunction with the embodiments shown in the accompanying drawings.

[0024] like Figure 1 or Figure 3 As shown, the air pump with integrated air inlet and outlet valves of the utility model comprises: a cylinder 1, a piston 2 arranged in the cylinder 1, an air outlet pipe 3 connected to the bottom of the cylinder 1, an air inlet valve 4 and an air outlet valve 5. Among them, the piston 2 can be rotated by a motor-driven gear 7, and the gear 7 further drives the connecting rod 8 to pull the piston 2 to reciprocate forward and backward. The special feature of the utility model is that the air inlet valve 4 and the air outlet valve 5 are made of elastic material and are integrated at the bottom of the cylinder 1. The air outlet valve 5 has an upper opening 51 and a lower opening 52 that are connected, wherein the upper opening 51 is opposite to the inner cavity of the cylinder 1, and the lower opening 52 is opposite to the air outlet pipe 3. The bottom of the cylinder 1 is provided with an air inlet hole 11 corresponding to the position of the air inlet valve 4.

[0025] For the convenience of description, it is assumed below that the central axis of the cylinder 1 is arranged along the vertical direction.

[0026] like Figure 5 , Figure 6 and Figure 7 As shown in FIG. 1 , the outlet valve 5 has a structure that is larger at the top and smaller at the bottom. The width of the upper opening 51 is larger and is open in a natural state without external force, while the width of the lower opening 52 is smaller and is closed in a natural state. In this embodiment, the upper opening 51 of the outlet valve 5 is elliptical and the lower opening 52 is a straight line segment in a natural state, so that the lower part of the outlet valve 5 is flat, as shown in FIG. Figure 7The vertical cross-sectional view perpendicular to the lower opening 52 of the straight section shows that the outlet valve 5 is generally in a V-shape with a larger upper portion and a smaller lower portion. The above structural design of the outlet valve 5 enables: when the piston 2 in the cylinder 1 is pushed forward, the airflow can rush downward from the upper opening 51 to open the lower opening 52. At this time, the lower opening 52 will open so that the airflow can enter the outlet pipe 3 for inflation; and when the piston 2 in the cylinder 1 is pushed backward, the lower opening 52 will automatically close to prevent the airflow from entering the cylinder 1 along the lower opening 52 from the outlet pipe 3 to cause leakage.

[0027] In this embodiment, the inlet valve 4 is provided with two and is respectively located on the left and right sides of the upper part of the outlet valve 5. Correspondingly, Figure 2 or Figure 4 The bottom of the cylinder 1 also has two air inlet holes 11, and two air inlet valves 4 are respectively sealed above the two air inlet holes 11. The two air inlet valves 4 and the air outlet valve 5 are made of silicone material and are integrally formed. The air inlet valve 4 is roughly semicircular, and is thinner on the inside connected to the air outlet valve 5 and thicker on the outside, so that when the piston 2 is pushed backward, the air inlet valve 4 is more likely to open upward to allow external air to enter the cylinder 1.

[0028] In order to better position the upper opening 51 of the outlet valve 5 and prevent the upper opening 51 from being deformed and leaking when the lower opening 52 is opened or closed, a positioning ring 6 is fixedly disposed in the cylinder 1 above the outlet valve 5. Figure 2 , Figure 4 and Figure 8 As shown, the positioning ring 6 is roughly elliptical, and a lug 62 is integrally provided on each of its left and right sides. A vertical through hole 63 is opened on the lug 62, and the vertical through hole 63 corresponds vertically to the position of the air inlet valve 4. A circle of first positioning grooves 61 is provided at the bottom of the positioning ring 6.

[0029] A lower recess 12 is provided at the bottom of the cylinder 1, and the lower recess 12 matches the peripheral shape of the air inlet valve 4, the upper part of the air outlet valve 5 and the positioning ring 6. The air inlet valve 4, the upper part of the air outlet valve 5 and the positioning ring 6 are embedded in the lower recess 12, and a gap is left between the air inlet valve 4 and the wall of the lower recess 12. A circle of second positioning grooves 13 is provided on the bottom surface of the lower recess 12.

[0030] like Figure 7As shown, the top of the outlet valve 5 has a top edge 53 extending upward, and the upper part of the outlet valve 5 is provided with a bottom edge 54 extending downward. The top edge 53 is embedded in the first positioning groove 61 at the bottom of the positioning ring 6, and the bottom edge 54 is embedded in the second positioning groove 13 at the lower concave position 12 at the bottom of the cylinder 1, so that the upper part of the outlet valve 5 and its upper opening 51 can be reliably positioned, and even if the lower opening 52 is opened or closed, the upper opening 51 will not be deformed.

[0031] When the power is turned on and the motor is started, the motor drives the piston 2 to move back and forth through the gear 7 and the connecting rod 8. Figure 1 and Figure 2 As shown, when the piston 2 is pushed backward, the lower opening 52 of the outlet valve 5 is in a closed state, and the external gas enters from the air inlet holes 11 on both sides, pushes open the air inlet valves 4 on both sides, and enters the inner cavity of the cylinder 1 along the gap between the air inlet valves 4 and the wall of the cylinder 1. Figure 3 and Figure 4 As shown, when the piston 2 is pushed forward, the gas in the cylinder 1 pushes open the lower opening 52 of the outlet valve 5. At this time, the lower opening 52 is open, and the air in the cylinder 1 can enter the outlet pipe 3 for inflation. At the same time, the air in the cylinder 1 flows downward from the vertical through holes 63 of the protruding ears 62 on both sides of the positioning ring 6, so that the air inlet valves 4 on both sides are pressed downward to close the air inlet hole 11.

[0032] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them. Those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An air pump with integrated air inlet and outlet valves, comprising: A cylinder (1), a piston (2) arranged in the cylinder (1), an air outlet pipe (3), an air inlet valve (4) and an air outlet valve (5); characterized in that: The air inlet valve (4) and the air outlet valve (5) are made of elastic material and are integrally arranged at the bottom of the cylinder (1); the air outlet valve (5) has an upper opening (51) with a larger width and open in a natural state, and a lower opening (52) with a smaller width and closed in a natural state, the upper opening (51) being opposite to the inner cavity of the cylinder (1), and the lower opening (52) being opposite to the air outlet pipe (3); the bottom of the cylinder (1) is provided with an air inlet hole (11) corresponding to the position of the air inlet valve (4); When the piston (2) is pushed backward, the lower opening (52) of the outlet valve (5) is closed and external gas enters from the air inlet hole (11), pushes open the air inlet valve (4) and enters the inner cavity of the cylinder (1) along the gap between the air inlet valve (4) and the wall of the cylinder (1); when the piston (2) is pushed forward, the air inlet valve (4) compresses and closes the air inlet hole (11), and pushes the gas in the inner cavity of the cylinder (1) to open the lower opening (52) of the outlet valve (5) and enter the outlet pipe (3).

2. The air pump with integrated air inlet and outlet valves according to claim 1, characterized in that: The air inlet valve (4) and the air outlet valve (5) are made of silicone material and are integrally formed.

3. The air pump with integrated air inlet and outlet valves according to claim 1, characterized in that: The upper opening (51) of the air outlet valve (5) is elliptical, and the lower opening (52) is a straight line segment in a natural state; the lower part of the air outlet valve (5) is flat.

4. The air pump with integrated air inlet and outlet valves according to claim 1, characterized in that: The air inlet valves (4) are provided with two valves and are respectively located on the left and right sides of the upper part of the air outlet valve (5). The air inlet valve (4) is thinner on the inner side connected to the air outlet valve (5) and thicker on the outer side.

5. The air pump with integrated air inlet and outlet valves according to claim 1, characterized in that: A positioning ring (6) is also fixedly arranged in the cylinder (1) and is located above the outlet valve (5). A circle of first positioning grooves (61) is provided at the bottom of the positioning ring (6). A circle of top edges (53) extends upward from the top of the outlet valve (5), and the top edges (53) are embedded in the first positioning grooves (61).

6. The air pump with integrated air inlet and outlet valves according to claim 5, characterized in that: The bottom of the cylinder (1) is provided with a lower recess (12) matching the peripheral shape of the air inlet valve (4), the upper part of the air outlet valve (5) and the positioning ring (6); the air inlet valve (4), the upper part of the air outlet valve (5) and the positioning ring (6) are embedded in the lower recess (12); and a gap is left between the air inlet valve (4) and the wall surface of the lower recess (12).

7. The air pump with integrated air inlet and outlet valves according to claim 6, characterized in that: The upper portion of the air outlet valve (5) is provided with a circle of bottom edge (54) extending downwards, and the bottom surface of the lower recess (12) is provided with a circle of second positioning grooves (13), and the bottom edge (54) is embedded in the second positioning groove (13).

8. The air pump with integrated air inlet and outlet valves according to claim 5, characterized in that: A lug (62) is integrally provided on the side surface of the positioning ring (6), and a vertical through hole (63) is provided on the lug (62). The vertical through hole (63) vertically corresponds to the position of the air inlet valve (4).

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