Air pump

Abstract

The utility model relates to the technical field of pumps, and provides an air pump which comprises a driver, an eccentric wheel, a steel needle, a connecting rod piece, a piston and an exhaust pipe. The eccentric wheel is connected with an output shaft of the driver, one end of the steel needle is connected with the eccentric wheel, and the other end of the steel needle is connected with the connecting rod piece; the eccentric wheel, the steel needle and the connecting rod piece form an eccentric connecting rod mechanism, the piston is connected with the connecting rod piece, and the eccentric connecting rod mechanism is used for driving the piston to do reciprocating motion; the exhaust pipe is connected with the driver, a fluid cavity is formed between the exhaust pipe and the piston, an exhaust port is formed in the exhaust pipe, and the exhaust port is communicated with the fluid cavity. The air pump has the effects of saving the assembly process of the air pump and reducing the machining cost.

Description

Technical Field

[0001] The present application relates to the technical field of pumps, and in particular to an air pump. Background Art

[0002] Air pumps have been widely used in medical and health care, instrumentation, automobiles, chemicals, scientific research and other industries, and have the functions of pumping, inflating, vacuuming, pressurizing, gas circulation, gas sampling, etc. In the related technology, the assembly of air pumps is relatively cumbersome and the cost is high, so it needs to be improved. Utility Model Content

[0003] In order to save the assembly process of the air pump and reduce the processing cost, the present application provides an air pump.

[0004] The present application provides an air pump adopting the following technical solution:

[0005] An air pump comprises a driver, an eccentric wheel, a steel needle, a connecting rod, a piston and an exhaust pipe, wherein the eccentric wheel is connected to the output shaft of the driver, one end of the steel needle is connected to the eccentric wheel, and the other end is connected to the connecting rod, the eccentric wheel, the steel needle and the connecting rod form an eccentric connecting rod mechanism, the piston is connected to the connecting rod, and the eccentric connecting rod mechanism is used to drive the piston to reciprocate; the exhaust pipe is connected to the driver and forms a fluid cavity between the exhaust pipe and the piston, an exhaust port is provided on the exhaust pipe, and the exhaust port is communicated with the fluid cavity.

[0006] By adopting the above technical solution, the driver is powered on to drive the eccentric wheel on its output shaft to rotate, and the eccentric connecting rod mechanism composed of the eccentric wheel, the steel needle and the connecting rod member drives the piston to reciprocate, thereby realizing the suction and exhaust action. The steel needle connects the connecting rod member and the eccentric wheel, and the entire air pump does not have a complicated and multi-structure, which reduces the process of assembling the micro fluid pump, reduces the production cost, and increases the service life of the connecting rod member or the eccentric wheel.

[0007] Preferably, the driver is also connected to a base, the base is located on the side where the eccentric wheel is located, the base is locked to the driver by fasteners, the exhaust pipe is connected to the base, and a accommodating cavity for installing the eccentric connecting rod mechanism is formed between the exhaust pipe and the base.

[0008] By adopting the above technical solution, the base is locked on the driver by fasteners, and a receiving cavity is formed between the base and the exhaust pipe. The receiving cavity accommodates the eccentric connecting rod mechanism, so that the eccentric wheel, steel needle and connecting rod can be protected without being directly exposed.

[0009] Preferably, the fastener is a fastening bolt or a fastening screw, and the fastening bolt or the fastening screw passes through the base and is screwed onto the driver.

[0010] By adopting the above technical solution, the fastening bolts or fastening screws are detachable objects, and the detachability between the base and the driver can be achieved.

[0011] Preferably, a plurality of card blocks are integrally connected to the exhaust pipe, and the card blocks are spaced apart along the circumference of the exhaust pipe; a plurality of card slots are provided on the base, and the card slots are spaced apart along the circumference of the base, and the card blocks are respectively snapped into the card slots.

[0012] By adopting the above technical solution, the positions of the clamping blocks and the clamping slots correspond one to one, and each clamping block is respectively clamped in each clamping slot. Under the action of clamping force and pressure, the connection between the exhaust pipe and the base is achieved.

[0013] Preferably, it also includes a cylinder, which is connected to the connecting rod and located between the connecting rod and the piston, the telescopic rod of the cylinder is connected to the piston, the piston is respectively provided with an air inlet check valve and an air outlet check valve, the exhaust pipe is provided with an air outlet conversion groove, and the cylinder is provided with an exhaust groove.

[0014] By adopting the above technical solution, the inlet and outlet one-way valves are designed as one with the piston to reduce the material cost of the pump. At the same time, the gas pumped out by the piston is converted to the diaphragm one-way valve on the piston through the outlet conversion groove on the exhaust pipe, and then passes through the exhaust groove on the cylinder to the outlet nozzle, thereby realizing the action of exhausting and inflating.

[0015] Preferably, a plurality of the air inlet one-way valves and the air outlet one-way valves are provided, and the air inlet one-way valves are distributed on the piston at intervals, and the air outlet one-way valves are also distributed on the piston at intervals.

[0016] By adopting the above technical solution, multiple air intake check valves can increase the volume of air intake, and multiple air outlet check valves can increase the volume of air outlet, thereby ensuring the normal operation of the air pump.

[0017] Preferably, a step is extended and connected to the piston, and the step is located on a side of the piston facing the cylinder and close to the intake one-way valve.

[0018] By adopting the above technical solution, the piston with integrated inlet and outlet check valves is increased in thickness from the edge of the inlet check valve to the piston corner, which ensures that the pump pressurization time, current and other performances are not affected. At the same time, the problem of the pump inflation time being prolonged due to deformation of the piston bottom and reduced fit between the inlet check valve and the inlet hole as the pressurization pressure increases during the pump pressurization process can be improved. Through this implementation method, the stability of the inflation time during the pump pressurization process is improved. At the same time, because the distance between the maximum height of the piston and the air chamber is reduced, the efficiency of the pump is improved, the pressure is increased, and the inflation noise is reduced.

[0019] Preferably, the driver is a drive motor or a drive motor, and the drive motor or the drive motor is used to control the rotation of the eccentric wheel.

[0020] By adopting the above technical solution, the drive motor or the drive motor can be used to drive the eccentric wheel to rotate.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] (1) By setting up an eccentric connecting rod mechanism, the steel needle connects the connecting rod and the eccentric wheel to form an eccentric connecting rod mechanism. The driver can drive the piston to reciprocate to complete the suction and exhaust actions. The entire air pump has a simple structure, which saves the assembly process of the air pump and reduces the processing cost.

[0023] (2) By providing a base, a receiving cavity formed between the base and the exhaust pipe can accommodate the eccentric connecting rod mechanism, thereby realizing isolation and protection of various components of the air pump.

[0024] (3) By setting a drive motor or a drive motor, the drive motor or the drive motor controls the rotation of the eccentric wheel, thereby converting the rotational motion of the eccentric wheel into the reciprocating motion of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cross-sectional schematic diagram of an air pump in an embodiment of the present application;

[0026] Figure 2 is an exploded schematic diagram of various components of the air pump in an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the structure of the piston in the embodiment of the present application;

[0028] Figure 4 is a schematic diagram of the structure of the exhaust pipe in the embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the structure of the cylinder in the embodiment of the present application;

[0030] Figure 6It is a schematic diagram of the structure of the piston in the embodiment of the present application.

[0031] Figure numerals: 1. driver; 2. base; 3. eccentric wheel; 4. steel needle; 5. connecting rod; 6. piston; 7. exhaust pipe; 8. fastener; 9. fluid cavity; 10. exhaust port; 11. block; 12. slot; 13. cylinder; 14. inlet check valve; 15. outlet check valve; 16. outlet conversion groove; 17. exhaust groove; 18. step. DETAILED DESCRIPTION

[0032] The technical solution of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0033] In the description of the present application, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection; it can also be a detachable connection; or integrated; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples shown in the present application.

[0037] The present application embodiment discloses an air pump. Figure 1 and Figure 2The air pump includes a driver 1, a base 2, an eccentric wheel 3, a steel needle 4, a connecting rod 5, a piston 6 and an exhaust pipe 7 which are arranged in sequence from bottom to top. The eccentric wheel 3 is fixedly connected to the output shaft of the driver 1, and the driver 1 is used to control the rotation of the eccentric wheel 3. The driver 1 is a driving motor or a driving motor. In this embodiment, the driving motor is taken as an example for explanation. The base 2 is fixedly mounted on one end where the output shaft of the driving motor is located by a fastener 8. The fastener 8 is a common detachable object such as a fastening bolt or a fastening screw. In this embodiment, it is a fastening screw. The fastening screw passes through the base 2 and is screwed on the driving motor to fix the base 2.

[0038] One end of the steel needle 4 is connected to the eccentric wheel 3, and the other end is connected to the connecting rod 5. The eccentric wheel 3, the steel needle 4 and the connecting rod 5 form an eccentric connecting rod mechanism. The piston 6 is connected to the connecting rod 5, and the driving motor drives the piston 6 to reciprocate through the eccentric connecting rod mechanism. The exhaust pipe 7 is connected to the base 2, and a receiving cavity is formed between the two. The receiving cavity is used to accommodate and install the eccentric connecting rod mechanism and the piston 6, so that the various components of the air pump will not be directly exposed and can be protected. Among them, a fluid cavity 9 for gas circulation is formed between the exhaust pipe 7 and the piston 6, and an exhaust port 10 is opened on the exhaust pipe 7, and the exhaust port 10 is connected to the fluid cavity 9.

[0039] The driving motor is powered on to drive the eccentric wheel 3 on its output shaft to rotate, and the rotational motion of the eccentric wheel 3 is converted into the linear motion of the piston 6, which drives the piston 6 to reciprocate, thereby realizing the suction and exhaust actions. The connecting rod 5 and the eccentric wheel 3 are connected by the steel needle 4. The eccentric connecting rod mechanism composed of the eccentric wheel 3, the steel needle 4 and the connecting rod 5 makes the whole air pump have no complicated and multiple structures, reduces the process of assembling the micro fluid pump, reduces the production cost, and increases the service life of the connecting rod 5 or the eccentric wheel 3.

[0040] Specifically, the exhaust pipe 7 is integrally connected with a plurality of clamping blocks 11, and the clamping blocks 11 are spaced apart along the circumference of the exhaust pipe 7; and the base 2 is provided with a plurality of clamping grooves 12, and the number of the clamping grooves 12 is equal to the number of the clamping blocks 11, and the clamping grooves 12 are spaced apart along the circumference of the base 2, and the clamping blocks 11 are respectively clamped into the clamping grooves 12, and the exhaust pipe 7 and the base 2 are fixed by the clamping relay force.

[0041] According to some embodiments of the present application, optionally, please refer to Figure 2 and Figure 3The air pump also includes a cylinder 13, which is located between the connecting rod 5 and the piston 6. The cylinder 13 is connected to the connecting rod 5, and the telescopic rod of the cylinder 13 is connected to the piston 6. An intake check valve 14 and an exhaust check valve 15 are respectively installed on the piston 6. As shown in the figure, in this embodiment, there are three intake check valves 14, which are spaced apart and distributed on the same side of the piston 6; there are also three exhaust check valves 15, which are also spaced apart and distributed on one side of the piston 6. Figure 4 and Figure 5 Among them, an exhaust conversion groove 16 is also opened on the exhaust pipe 7, and the exhaust conversion groove 16 is connected to the fluid cavity 9 of the piston 6; a corresponding exhaust groove 17 is opened on the cylinder 13, and the exhaust groove 17 is also connected to the piston 6.

[0042] By designing the inlet and outlet check valves and the piston 6 as one, the pump material cost is reduced; at the same time, the gas pumped out by the piston 6 is converted to the diaphragm check valve on the piston 6 through the outlet conversion groove 16 on the exhaust pipe 7, and then passes through the exhaust groove 17 on the cylinder 13 to the outlet nozzle, thereby realizing the action of pumping and inflating. The multiple inlet check valves 14 and outlet check valves 15 can increase the volume of gas passing through, ensuring the stable operation of the air pump.

[0043] Reference Figure 6 In addition, a step 18 is extended and connected to the piston 6, and the step 18 is located on the side of the piston 6 facing the cylinder 13 and close to the position of the intake check valve 14. The piston 6 with integrated inlet and outlet check valves 15, by increasing the thickness of the edge of the intake check valve 14 extending to the corner of the piston 6, ensures that the pump pressurization time, current and other performances are not affected, and at the same time, it can improve the problem that as the pressurization pressure increases during the pump pressurization process, the bottom of the piston 6 is deformed, the air intake check valve 14 and the air intake hole are reduced, and the pump inflation time becomes longer. Through this embodiment, on the one hand, the stability of the inflation time during the pump pressurization process is improved, and at the same time, because the distance between the maximum height of the piston 6 and the air chamber is reduced, the efficiency of the pump is improved, the pressure is increased, and the inflation noise is reduced.

[0044] The implementation principle of the air pump of the embodiment of the present application is as follows: the steel needle 4 connects the connecting rod 5 and the eccentric wheel 3 to form an eccentric connecting rod mechanism, and the driver 1 is energized to drive the eccentric wheel 3 on its output shaft to rotate, and drives the piston 6 to reciprocate, so as to realize the suction and exhaust action of the fluid pump. The entire air pump has a simple structure, which can save the assembly process of the air pump and reduce the processing cost.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air pump, characterized in that: The invention comprises a driver (1), an eccentric wheel (3), a steel needle (4), a connecting rod (5), a piston (6) and an exhaust pipe (7), wherein the eccentric wheel (3) is connected to the output shaft of the driver (1), one end of the steel needle (4) is connected to the eccentric wheel (3) and the other end is connected to the connecting rod (5), the eccentric wheel (3), the steel needle (4) and the connecting rod (5) form an eccentric connecting rod mechanism, the piston (6) is connected to the connecting rod (5), and the eccentric connecting rod mechanism is used to drive the piston (6) to perform reciprocating motion; the exhaust pipe (7) is connected to the driver (1) and a fluid cavity (9) is formed between the exhaust pipe (7) and the piston (6), and an exhaust port (10) is provided on the exhaust pipe (7), and the exhaust port (10) is communicated with the fluid cavity (9).

2. An air pump according to claim 1, characterized in that: The driver (1) is also connected to a base (2), the base (2) being located on the side where the eccentric wheel (3) is located, the base (2) being locked to the driver (1) via a fastener (8), the exhaust pipe (7) being connected to the base (2), and a receiving cavity for installing the eccentric connecting rod mechanism being formed between the exhaust pipe (7) and the base (2).

3. An air pump according to claim 2, characterized in that: The fastener (8) is a fastening bolt or a fastening screw, and the fastening bolt or the fastening screw passes through the base (2) and is screwed onto the driver (1).

4. An air pump according to claim 2, characterized in that: The exhaust pipe (7) is integrally connected with a plurality of clamping blocks (11), each of which is spaced apart along the circumference of the exhaust pipe (7); the base (2) is provided with a plurality of clamping grooves (12), each of which is spaced apart along the circumference of the base (2), and each of the clamping blocks (11) is respectively clamped in each of the clamping grooves (12).

5. An air pump according to claim 1, characterized in that: The invention also comprises a cylinder (13), wherein the cylinder (13) is connected to the connecting rod (5) and is located between the connecting rod (5) and the piston (6), the telescopic rod of the cylinder (13) is connected to the piston (6), the piston (6) is provided with an air inlet check valve (14) and an air outlet check valve (15), the exhaust pipe (7) is provided with an air outlet conversion groove (16), and the cylinder (13) is provided with an exhaust groove (17).

6. An air pump according to claim 5, characterized in that: A plurality of the air intake check valves (14) and the air outlet check valves (15) are provided, and the air intake check valves (14) are distributed on the piston (6) at intervals, and the air outlet check valves (15) are also distributed on the piston (6) at intervals.

7. An air pump according to claim 5, characterized in that: A step (18) is extended and connected to the piston (6), and the step (18) is located on a side of the piston (6) facing the cylinder (13) and close to the intake check valve (14).

8. An air pump according to claim 1, characterized in that: The driver (1) is a drive motor or a drive motor, and the drive motor or the drive motor is used to control the rotation of the eccentric wheel (3).

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