An air pump mechanism and an electric air pump

Abstract

This application discloses an air pump mechanism and an electric air pump, including a motor, a connecting rod, and a cylinder; the motor drives the connecting rod so that the rod head moves up and down within the cylinder cavity; the bottom surface of the rod head is serrated. This utility model provides an air pump mechanism and an electric air pump that can reduce energy consumption, improve efficiency, and reduce noise.

Description

Technical Field

[0001] This utility model relates to the field of air pump technology, and more specifically to an air pump mechanism and an electric air pump. Background Technology

[0002] Electric air pumps are generally used to inflate objects and are widely used in automobiles, motorcycles, bicycles, balls, rubber boats, and other fields. They are favored by consumers for their rapid inflation and simple operation. The pump mechanism is the core component of an electric air pump. It uses a motor to drive a connecting rod to reciprocate within a cylinder to inflate the air. However, most electric air pumps on the market currently use a flat-bottomed connecting rod to compress the gas in the cylinder to achieve the inflation function. The connecting rod experiences a large force when compressing the gas, resulting in the air pump requiring a high current to operate normally, leading to high energy consumption and low equipment efficiency. In addition, when the electric air pump is working, the high-speed compression of gas by the connecting rod within the cylinder generates significant noise, affecting the user experience. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an air pump core and an electric air pump, which can reduce energy consumption, improve efficiency, and reduce noise.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an air pump core, including a motor, a connecting rod and a cylinder; the motor drives the connecting rod so that the rod head moves up and down in the inner cavity of the cylinder; the bottom surface of the rod head is a serrated surface.

[0005] In a preferred embodiment, the air pump core also includes a gear and a gear bearing, with the gear shaft inserted into the gear bearing;

[0006] One end of the motor shaft is provided with meshing teeth, which mesh with gears for transmission;

[0007] The upper end of the connecting rod is provided with a connecting rod drive shaft and a connecting rod bearing. One end of the connecting rod drive shaft is inserted into the connecting rod bearing, and the other end of the connecting rod drive shaft is inserted into the drive shaft socket on the gear.

[0008] In a preferred embodiment, the lower end of the cylinder is provided with a cylinder head, and the cylinder head is provided with an exhaust passage communicating with the exhaust port of the cylinder; the exhaust passage is provided with a sealing block and an elastic element, the elastic element being used to support the sealing block so that the sealing block blocks the exhaust port of the cylinder.

[0009] In a preferred embodiment, the elastic element is a compression spring, with one end connected to a sealing block and the other end resting against the bottom surface of the cylinder head cavity.

[0010] In a preferred embodiment, the serrated surface comprises a plurality of uniformly arranged serrated portions.

[0011] In a preferred embodiment, the tooth tip angle of the serration is 50° to 130°.

[0012] In a preferred embodiment, a fan is driven to the other end of the motor shaft.

[0013] An electric air pump includes an air pump mechanism as described in any of the above technical solutions.

[0014] The electric air pump in this technology uses the aforementioned air pump mechanism, which can improve operating efficiency, extend its service life, and reduce operating noise.

[0015] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model provides an air pump mechanism that, by designing the bottom of the connecting rod as a serrated surface, changes the contact surface between the gas and the connecting rod from a flat plane to a serrated surface when the connecting rod compresses gas in the cylinder. This reduces the number of points of force application. Furthermore, since the serrated surface is composed of pairs of inclined planes, the surface where the gas contacts the connecting rod also becomes inclined during gas compression. These inclined planes distribute the force of the compressed airflow, reducing the force on the direction of airflow. Therefore, the force on the connecting rod during gas compression is reduced. This reduced force on the connecting rod lowers the current of the electric air pump, effectively reducing energy consumption and motor heat generation, thereby improving the operating efficiency and extending the service life of the electric air pump. Simultaneously, the high-speed compression of gas by the connecting rod in the cylinder generates noise. By making the bottom of the connecting rod serrated, the direct contact between the gas and the bottom of the connecting rod becomes an inclined contact, reducing gas friction and further minimizing the noise of gas compression, thus effectively reducing the operating noise of the electric air pump.

[0017] An electric air pump using the aforementioned air pump mechanism can improve operating efficiency, extend its service life, and reduce operating noise.

[0018] In addition, other advantages of this invention will be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the air pump core of this utility model;

[0021] Figure 2This is a side view of the connecting rod of this utility model;

[0022] Figure 3 for Figure 2 Cross-sectional view of the middle connecting rod AA;

[0023] Figure 4 This is a bottom view of the connecting rod of this utility model;

[0024] Explanation of reference numerals in the attached drawings: 1. Motor; 11. Gear; 12. Gear bearing; 13. Meshing teeth; 2. Connecting rod; 20. Serrated surface; 21. Connecting rod drive shaft; 22. Connecting rod bearing; 23. Piston ring; 24. Piston ring groove; 3. Cylinder; 4. Cylinder head; 41. Sealing block; 42. Elastic element; 5. Fan. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Reference Figure 1-4 This invention describes an air pump mechanism and an electric air pump according to an embodiment of the present invention.

[0028] In one embodiment, such as Figure 1-4 As shown, an air pump mechanism includes a motor 1, a connecting rod 2, and a cylinder 3; the motor 1 drives the connecting rod 2 so that the rod head of the connecting rod 2 moves up and down in the inner cavity of the cylinder 3; the bottom surface of the rod head is a serrated surface 20.

[0029] The motor 1 is driven by the connecting rod 2 through a transmission mechanism, which can be a gear transmission structure; the connecting rod 2 can be a piston rod commonly used in the prior art.

[0030] In one embodiment of this invention, a drive gear is fitted onto one end of the shaft of the motor 1. The drive gear meshes with a transmission gear. The transmission gear is equipped with a rotating shaft, and bearings are provided on one or both sides of the rotating shaft. The end of the connecting rod 2 away from the rod head is connected to the transmission gear, and the connection point is eccentrically positioned relative to the center of the transmission gear. Whenever the transmission gear rotates once, the connecting rod 2 reciprocates once.

[0031] In another embodiment of this invention, the transmission gear can also be connected to the end of the connecting rod 2 away from the rod head. For example, the rotating shaft of the transmission gear is coaxially connected to a cam, and the end of the connecting rod 2 away from the rod head is connected to the eccentric position of the cam. Whenever the transmission gear rotates once, it drives the cam to rotate once, and the connecting rod 2 reciprocates once.

[0032] The air pump core provided in this embodiment has a sawtooth surface 20 at the bottom of the connecting rod 2. When the connecting rod 2 compresses gas in the cylinder 3, the contact surface between the gas and the connecting rod 2 changes from a plane to a sawtooth surface 20, reducing the force point. Since the sawtooth surface 20 is composed of two inclined surfaces, the surface where the gas contacts the connecting rod 2 also becomes an inclined surface when compressing the gas. The inclined surface will divide the force of the compressed air and reduce the force on the moving air direction. Therefore, the force on the connecting rod 2 when compressing gas will be smaller. With the force on the connecting rod 2 reduced, the current of the electric air pump will be reduced, which can effectively reduce the energy consumption of the electric air pump, reduce the heat generated by the motor 1, thereby improving the operating efficiency of the electric air pump and extending its service life.

[0033] Secondly, the high-speed compression of gas by connecting rod 2 within cylinder 3 generates noise. By making the bottom of connecting rod 2 serrated, the frontal contact between the gas and the bottom of connecting rod 2 is changed to an inclined contact, which reduces the friction of the gas and makes the noise of compressed gas even lower, thereby effectively reducing the operating noise of the electric air pump.

[0034] In this embodiment, the air pump core also includes a gear 11 and a gear bearing 12, with the shaft of the gear 11 inserted into the gear bearing 12;

[0035] One end of the shaft of motor 1 is provided with a meshing tooth 13, which meshes with gear 11 for transmission;

[0036] The upper end of the connecting rod 2 is provided with a connecting rod drive shaft 21 and a connecting rod bearing 22. One end of the connecting rod drive shaft 21 is inserted into the connecting rod bearing 22, and the other end of the connecting rod drive shaft 21 is inserted into the drive shaft insertion hole on the gear 11.

[0037] The aforementioned air pump core achieves the driving connection between the motor 1 and the connecting rod 2 through the meshing teeth 13, gear 11, and connecting rod drive shaft 21. It has a simple structure and efficient and stable transmission.

[0038] In this embodiment, the lower end of the cylinder 3 is provided with a cylinder head 4, and the cylinder head 4 is provided with an exhaust channel communicating with the exhaust port of the cylinder 3; the exhaust channel is provided with a sealing block 41 and an elastic member 42, and the elastic member 42 is used to support the sealing block 41 so that the sealing block 41 blocks the exhaust port of the cylinder 3.

[0039] The air outlet of cylinder 3 is located at the bottom of cylinder 3 and is connected to the air outlet channel. In specific implementation, when connecting rod 2 moves downward in cylinder 3, it exerts pressure on the sealing block 41, the elastic element 42 is compressed downward, the sealing block 41 disengages from the air outlet of cylinder 3, and the air outlet of cylinder 3 is connected to the air outlet channel to realize air pumping. When connecting rod 2 moves upward in cylinder 3, the pressure on the sealing block 41 disappears, the elastic element 42 resets, pushes the sealing block 41 upward, and blocks the air outlet of cylinder 3 to prevent the gas in the air pumped container from flowing back into the cylinder.

[0040] The aforementioned air pump core, by setting a sealing block 41 and an elastic element 42 in the air outlet channel, can prevent the backflow of gas in the air-pumped container, which is simple in structure and low in cost.

[0041] In this embodiment, the elastic element 42 is a compression spring, one end of which is connected to the sealing block 41, and the other end rests on the bottom surface of the inner cavity of the cylinder head 4. The bottom surface of the inner cavity of the cylinder head 4 may have protrusions or grooves to fix one end of the compression spring to the bottom surface of the inner cavity of the cylinder head 4.

[0042] In this embodiment, the serrated surface 20 includes multiple evenly arranged serrated sections, which can ensure a balanced force distribution, reduce the risk of deformation and overheating, and extend the service life.

[0043] In this embodiment, the tooth tip angle of the serration is 50° to 130°.

[0044] In practice, the tooth tip angle of the saw teeth can be any value within the range of 50° to 130°, such as 50°, 60°, 90°, 130°, etc.

[0045] In this embodiment, a fan 5 is driven to the other end of the shaft of motor 1 to dissipate heat from motor 1 and prevent motor 1 from overheating and affecting its service life.

[0046] In the above embodiments, the rod head of the connecting rod 2 is provided with a piston ring groove 24 for accommodating the piston ring 23. Specifically, the upper end face of the piston ring groove 24 is an annular plane, and the lower end face is composed of multiple protrusions extending outwards from the edge of the serrated surface 20 of the connecting rod 2. An intake gap is formed through the gap between two adjacent protrusions. When the connecting rod 2 moves upward, the piston ring 23 abuts against the lower end face of the piston ring groove 24. At this time, the piston ring 23 cannot completely block the intake gap, and the inner cavity of the cylinder 3 communicates with the outside through the intake gap, thus enabling air intake. When the connecting rod 2 moves downward, the piston ring 23 abuts against the upper end face of the piston ring groove 24, achieving a seal.

[0047] In another embodiment, the present invention provides an electric air pump that includes the air pump core as described in any of the above embodiments, which can improve operating efficiency, extend its service life, and reduce operating noise.

[0048] In a specific implementation, the electric air pump may include a housing, an air pump mechanism, and a control circuit board for controlling the operation of the air pump mechanism, all of which are installed inside the housing.

[0049] Other components and operations of the air pump core and electric air pump according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] In the description of this specification, references to the terms "embodiment," "specific embodiment," "example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention.

[0052] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined with each other in any suitable manner in one or more embodiments or examples without interference or contradiction.

Claims

1. A gas pump movement, characterized by: It includes a motor (1), a connecting rod (2) and a cylinder (3); the motor (1) drives the connecting rod (2) so that the rod head of the connecting rod (2) moves up and down in the inner cavity of the cylinder (3); the bottom surface of the rod head is a serrated surface (20).

2. The gas pump movement of claim 1, wherein: It also includes a gear (11) and a gear bearing (12), the shaft of which is inserted into the gear bearing (12); The motor (1) has a meshing tooth (13) at one end of its shaft, which meshes with the gear (11) for transmission. The upper end of the connecting rod (2) is provided with a connecting rod drive shaft (21) and a connecting rod bearing (22). One end of the connecting rod drive shaft (21) is inserted into the connecting rod bearing (22), and the other end of the connecting rod drive shaft (21) is inserted into the drive shaft insertion hole on the gear (11).

3. The gas pump movement of claim 1, wherein: The lower end of the cylinder (3) is provided with a cylinder cover (4), and the cylinder cover (4) is provided with an air outlet channel communicating with the air outlet of the cylinder (3); the air outlet channel is provided with a sealing block (41) and an elastic element (42), and the elastic element (42) is used to support the sealing block (41) so that the sealing block (41) blocks the air outlet of the cylinder (3).

4. The gas pump movement of claim 3, wherein: The elastic element (42) is a compression spring, one end of which is connected to the sealing block (41), and the other end rests on the bottom surface of the inner cavity of the cylinder head (4).

5. The gas pump movement according to any one of claims 1 to 4, characterized in that: The serrated surface (20) includes a plurality of evenly arranged serrated sections.

6. The gas pump movement of claim 5, wherein: The tooth tip angle of the serrated part is 50° to 130°.

7. The gas pump primer of claim 2, wherein: The other end of the shaft of the motor (1) is connected to a fan (5).

8. An electric air pump characterized by: Includes the air pump mechanism as described in any one of claims 1 to 7.

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