Electric inflator pump

Abstract

The utility model discloses an electric inflator pump, which comprises a shell, a pump body, a motor, a pump body and a motor, the valve element assembly is arranged in the cavity; the wrench is hinged to the shell, a pressing block is arranged at the hinged end of the wrench, the pressing block is eccentrically arranged relative to the hinged center, and the wrench is located on one side of the valve element assembly; the rubber sleeve is arranged on the other side of the valve element assembly, and an air channel is formed in the rubber sleeve; the fixing sleeve is arranged on the shell and is used for axially limiting the rubber sleeve; the wrench is rotated, the pressing block on the wrench pushes the valve element assembly to move axially, the rubber sleeve is pushed by the valve element assembly to deform in the radial direction, and an air channel in the rubber sleeve becomes small. An external inflation pipe is not needed, the device can be directly fixed on a tire valve, hands are liberated, and the device is convenient to use.

Description

Technical Field

[0001] The utility model relates to an air pump, in particular to an electric air pump. Background Art

[0002] The air pump is used to inflate tires, replacing the manual air pump in the prior art. It is convenient and easy to use and is loved by consumers.

[0003] In the prior art, an air pump typically requires connecting to an air hose, which is then connected to the tire via the hose. This hose is difficult to store, takes up space, and is easily lost. Furthermore, when using an air pump to inflate a tire, the hose must be manually pressed against the tire valve. This can be labor-intensive and can easily fatigue the hands, especially in situations where inflation takes a long time.

[0004] For this reason, it is necessary to improve and optimize the existing air pump. Utility Model Content

[0005] The present invention aims to solve at least one of the problems in the prior art. To this end, the present invention provides an electric air pump that does not require an external air inflation tube and can be directly fixed to the tire valve, freeing up hands and making it easy to use.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] An electric air pump, comprising:

[0008] a housing, wherein a cavity is provided on the housing;

[0009] a valve core assembly, disposed in the cavity;

[0010] A wrench is hinged on the housing, a pressure block is provided at the hinged end of the wrench, the pressure block is eccentrically arranged relative to the hinge center, and the wrench is located on one side of the valve core assembly;

[0011] A rubber sleeve is provided on the other side of the valve core assembly, and an air passage is provided in the rubber sleeve;

[0012] A fixed sleeve, provided on the housing and axially limiting the rubber sleeve;

[0013] When the wrench is turned, the pressure block on the wrench pushes the valve core assembly to move axially, and the rubber sleeve is pushed by the valve core assembly to deform radially, so that the air channel in the rubber sleeve becomes smaller.

[0014] Optionally, the wrench is hinged to the shell through a hinge shaft, both ends of the hinge shaft are smooth shafts, the smooth shafts are hinged to the shell, the middle section of the hinge shaft has a protruding anti-slip structure, the wrench is placed on the anti-slip structure, and the wrench is fixedly connected to the hinge shaft.

[0015] Optionally, the anti-slip structure is anti-slip teeth.

[0016] Optionally, the upper end of the wrench is provided with a dial recess for easy insertion of fingers.

[0017] Optionally, the wrench is further provided with a hanging hole.

[0018] Optionally, the fixing sleeve is threadedly connected to the housing, a convex ring is provided in the fixing sleeve, and the rubber sleeve axially abuts against the convex ring.

[0019] Optionally, the valve core assembly includes a first valve body and a second valve body, one end of the first valve body is closed, a first air inlet notch is provided on the side wall of the first valve body, a second air inlet notch is provided on the side wall of the second valve body, a top core is provided at one end of the second valve body, an air inlet hole is provided at the root of the top core, the air inlet hole is connected to the second air inlet notch, the first valve body is provided on the side close to the wrench, the second valve body is provided between the first valve body and the rubber sleeve, the air duct in the rubber sleeve includes a large air duct and a small air duct, and the large air duct and the small air duct are axially arranged and connected.

[0020] Optionally, the small air passage of the rubber sleeve is arranged toward the second valve body, and the top core of the second valve body extends into the small air passage and the large air passage to form a Schrader valve.

[0021] Optionally, the large air passage of the rubber sleeve is arranged toward the second valve body, and the top core of the second valve body is arranged toward the first valve body, forming a Presta valve.

[0022] The utility model has at least one of the following beneficial effects: the utility model embodiment hinges a wrench on the shell, and a pressure block is provided at the hinged end of the wrench, which is eccentrically arranged relative to the hinge center, and the wrench is located on one side of the valve core assembly; a rubber sleeve is arranged on the other side of the valve core assembly, and an air channel is provided in the rubber sleeve; a fixed sleeve is arranged on the shell and axially limits the rubber sleeve. When the tire needs to be inflated, the air pump is aligned with the tire nozzle, and the wrench is rotated. The pressure block on the wrench pushes the valve core assembly to move axially due to the eccentricity, and the rubber sleeve is affected by the valve core assembly. The push causes the rubber sleeve to deform radially, making the air channel in the rubber sleeve smaller, so that the rubber sleeve can clamp the tire valve through the smaller air channel. As a result, the user can free his hands and allow the air pump to complete the inflation of the tire by itself; after the inflation is completed, the wrench is rotated in the opposite direction, the axial force on the rubber sleeve is released, the radial size of the air channel in the rubber sleeve becomes larger, and the tire valve is loosened, and the air pump can be smoothly removed from the tire. Therefore, the structure of the utility model frees the hands, making the electric air pump more convenient and labor-saving to use; and, there is no need to configure an inflation tube, the structure is simpler, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the three-dimensional structure of the electric air pump in the embodiment of the present utility model;

[0024] Figure 2 1 is a schematic cross-sectional view of the electric air pump (American-style air nozzle) in an embodiment of the present utility model;

[0025] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the hinge shaft in the embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the second valve body in the embodiment of the present utility model;

[0028] Figure 6 yes Figure 5 Schematic diagram from another angle;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the wrench in the embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the first valve body in the embodiment of the present utility model;

[0031] Figure 9 1 is a schematic cross-sectional view of the electric air pump (Presta valve) in an embodiment of the present invention;

[0032] Description of Figure Numbers:

[0033] 1-shell, 2-valve core assembly, 21-first valve body, 211-first air inlet notch, 22-second valve body, 221-second air inlet notch, 222-top core, 223-air inlet hole, 3-wrench, 31-pressure block, 32-sliding recess, 33-hanging hole, 4-rubber sleeve, 41-large air duct, 42-small air duct, 5-fixing sleeve, 51-convex ring, 6-hinge shaft, 61-anti-slip structure. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless there is any conflict, the embodiments and features in the embodiments described below can be combined with each other in any manner.

[0035] Many different implementations or examples are provided below to implement the structure of the present invention.

[0036] See also Figures 1-9An electric air pump according to an embodiment of the present invention includes a housing 1, wherein the housing 1 is provided with a cavity; a valve core assembly 2, which is provided in the cavity, and the valve core assembly 2 can use a structure well known in the art; a wrench 3, which is hinged on the housing 1, and a pressure block 31 is provided at the hinged end of the wrench 3, and the pressure block 31 is eccentrically arranged relative to the hinge center, and the wrench 3 is located on one side of the valve core assembly 2; a rubber sleeve 4, which is provided on the other side of the valve core assembly 2, and an air passage is provided in the rubber sleeve 4; a fixed sleeve 5, which is provided on the housing 1 and axially limits the rubber sleeve 4; when the wrench 3 is rotated, the pressure block 31 on the wrench 3 pushes the valve core assembly 2 to move axially, and the rubber sleeve 4 is pushed by the valve core assembly 2 and radially deformed, so that the air passage in the rubber sleeve 4 becomes smaller. That is, for the rubber sleeve 4, with Figure 2 As shown in the example, the right side of the rubber sleeve 4 is limited by the fixing sleeve 5 and cannot continue to move to the right. When the left end of the rubber sleeve 4 is pushed by the valve core assembly 2, the left end of the rubber sleeve 4 will move to the right. Since the rubber sleeve 4 is elastic, the rightward movement of the left end of the rubber sleeve 4 causes the entire rubber sleeve 4 to be squeezed. The squeezing force will cause the rubber sleeve 4 to deform. Since there is an air channel in the rubber sleeve 4, a cavity is formed at the air channel position. The deformation of the rubber sleeve 4 will be transferred to the cavity position, causing the cavity position of the rubber sleeve 4 to undergo radial deformation. As a result, the radial direction of the air channel of the rubber sleeve 4 becomes smaller, so that the cavity wall clamps the tire air nozzle, completing the fixation of the air pump on the tire air nozzle. At the same time, after the rubber sleeve 4 clamps the tire air nozzle, it can also form a seal between the rubber sleeve air channel and the tire air nozzle to avoid air leakage, ensuring that the gas from the air pump enters the tire air nozzle to complete inflation.

[0037] See Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the wrench 3 is hinged to the shell 1 through a hinge shaft 6, both ends of the hinge shaft 6 are smooth shafts, the smooth shafts are hinged to the shell 1, and the middle section of the hinge shaft 6 has a protruding anti-slip structure 61. The wrench 3 is sleeved on the anti-slip structure 61, and the wrench 3 is fixedly connected to the hinge shaft 6. Because the anti-slip structure 61 protrudes relative to the smooth shaft, during installation, the hinge shaft 6 is knocked into the hinge hole on the housing 1. After the anti-slip structure 61 passes through the hinge hole, the hinge shaft 6 is hinged to the housing 1 through the smooth shafts at both ends. The presence of the anti-slip structure 61 prevents relative rotation between the wrench 3 and the hinge shaft 6, and the fixed position of the two will not wear. Therefore, after long-term use, the anti-slip structure 61 will not wear and ensure that the hinge shaft 6 will not axially disengage from the hinge hole on the housing 1; in other words, if there is no anti-slip structure 61, there will be relative rotation between the wrench 3 and the hinge shaft 6, resulting in wear, which may cause the hinge shaft 6 to axially disengage from the hinge shaft on the housing 1, shortening the service life of the wrench. In some embodiments of the present invention, the anti-slip structure 61 is an anti-slip tooth.

[0038] See Figure 7As shown, in some embodiments of the present invention, the upper end of the wrench 3 is provided with a dial recess 32 for easy insertion of a finger. After inflation is completed, a person inserts a hand into the dial recess 32 to apply force, thereby conveniently resetting the wrench 3 to release the tightening effect of the wrench 3 on the valve core assembly 2.

[0039] See Figure 7 As shown, in some embodiments of the present invention, a hanging hole 33 is further provided on the wrench 3, so that the electric air pump described in the embodiment of the present invention can be hung on a bicycle or other equipment as needed, which is convenient for storage and carrying.

[0040] See Figure 2 and Figure 9 As shown, in some embodiments of the present invention, the fixing sleeve 5 is threadedly connected to the housing 1, and a convex ring 51 is provided in the fixing sleeve. The rubber sleeve 4 axially abuts against the convex ring 51. This structure makes the fixing sleeve easy to connect and the axial limitation of the rubber sleeve 4 is reliable.

[0041] See Figure 2 、 Figure 5 、 Figure 6 、 Figure 8 and Figure 9 As shown, in some embodiments of the present invention, the valve core assembly 2 includes a first valve body 21 and a second valve body 22, one end of the first valve body 21 is closed, a first air inlet notch 211 is provided on the side wall of the first valve body 21, a second air inlet notch 221 is provided on the side wall of the second valve body 22, a top core 222 is provided at one end of the second valve body 22, an air inlet hole 223 is provided at the root of the top core 22, and the air inlet hole 223 is connected to the second air inlet notch 221, the first valve body 21 is arranged on the side close to the wrench 3, the second valve body 22 is arranged between the first valve body 21 and the rubber sleeve 4, the air channel in the rubber sleeve 4 includes a large air channel 41 and a small air channel 42, and the large air channel 41 and the small air channel 42 are axially arranged and connected.

[0042] See Figure 2 As shown, in some embodiments of the present invention, the small air passage 42 of the rubber sleeve 4 is arranged toward the second valve body 22, and the top core 222 of the second valve body 22 extends into the small air passage 42 and the large air passage 41. Thus, the air nozzle composed of the valve core assembly 2, the rubber sleeve 4 and other components forms a Schrader air nozzle, which is convenient for inflating the tire of the Schrader air nozzle. The air path is as follows Figure 2 As shown in a, the gas enters through the second air inlet notch 221 and the air inlet hole 223 of the second valve body 22 and finally enters the tire valve.

[0043] See Figure 9As shown, in some embodiments of the present invention, the large air passage 41 of the rubber sleeve 4 is arranged toward the second valve body 22, and the top core 222 of the second valve body 22 is arranged toward the first valve body 21. Thus, the air nozzle composed of the valve core assembly 2, the rubber sleeve 4 and other components forms a Presta valve, which is convenient for inflating the tire of the Presta valve. The air path is as follows Figure 9 As shown in b, the gas enters through the first air inlet notch 211 and the air inlet hole 223 of the first valve body 21 and finally enters the tire valve.

[0044] Therefore, the structure of the valve core assembly 2 and the rubber sleeve 4 in the embodiment of the present invention can be adjusted by adjusting the direction of the second valve body 22 and the rubber sleeve 4 ( Figure 9 Relative to Figure 2 , the second valve body 22 and the rubber sleeve 4 are both turned 180 degrees), so as to realize the switching between the American gas nozzle and the Presta gas nozzle of the electric air pump, thereby increasing the versatility of the accessories and reducing the production cost.

[0045] The working principle of the embodiment of the utility model is as follows: when it is necessary to inflate the tire, after aligning the air pump with the tire valve, the wrench 3 is rotated. The pressure block 31 on the wrench 3 pushes the valve core assembly 2 axially due to eccentricity. The rubber sleeve 4 is pushed by the valve core assembly 2 and deforms radially, causing the air passage in the rubber sleeve 4 to become smaller. The rubber sleeve 4 can clamp the tire valve through the smaller air passage. As a result, the user can free their hands and allow the air pump to complete the inflation of the tire on its own. After inflation is completed, the wrench 3 is rotated in the opposite direction. The axial force on the rubber sleeve 4 is released, the radial size of the air passage in the rubber sleeve 4 becomes larger, and the tire valve is loosened. The air pump can be smoothly removed from the tire. Therefore, the structure of the utility model frees the hands, making the electric air pump more convenient and labor-saving to use. In addition, there is no need to configure an inflation tube, which makes the structure simpler and the cost lower.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An electric air pump, characterized in that: include: a housing, wherein a cavity is provided on the housing; a valve core assembly, disposed in the cavity; A wrench is hinged on the housing, a pressure block is provided at the hinged end of the wrench, the pressure block is eccentrically arranged relative to the hinge center, and the wrench is located on one side of the valve core assembly; A rubber sleeve is provided on the other side of the valve core assembly, and an air passage is provided in the rubber sleeve; A fixed sleeve, provided on the housing and axially limiting the rubber sleeve; When the wrench is turned, the pressure block on the wrench pushes the valve core assembly to move axially, and the rubber sleeve is pushed by the valve core assembly to deform radially, so that the air channel in the rubber sleeve becomes smaller.

2. An electric air pump according to claim 1, characterized in that: The wrench is hinged to the housing via an articulated shaft. Both ends of the articulated shaft are smooth shafts, which are hinged to the housing. The middle section of the articulated shaft has a protruding anti-slip structure, and the wrench is placed on the anti-slip structure. The wrench is fixedly connected to the articulated shaft.

3. The electric air pump according to claim 2, characterized in that: The anti-slip structure is anti-slip teeth.

4. An electric air pump according to any one of claims 1 to 3, characterized in that: The upper end of the wrench is provided with a dialing recess for convenient insertion of fingers.

5. An electric air pump according to any one of claims 1 to 3, characterized in that: The wrench is also provided with a hanging hole.

6. The electric air pump according to claim 1, characterized in that: The fixing sleeve is threadedly connected to the housing. A convex ring is provided in the fixing sleeve, and the rubber sleeve axially abuts against the convex ring.

7. The electric air pump according to claim 1, characterized in that: The valve core assembly includes a first valve body and a second valve body, one end of the first valve body is closed, a first air inlet notch is provided on the side wall of the first valve body, a second air inlet notch is provided on the side wall of the second valve body, a top core is provided at one end of the second valve body, an air inlet hole is provided at the root of the top core, and the air inlet hole is connected with the second air inlet notch, the first valve body is arranged on the side close to the wrench, and the second valve body is arranged between the first valve body and the rubber sleeve, the air passage in the rubber sleeve includes a large air passage and a small air passage, and the large air passage and the small air passage are axially arranged and connected.

8. The electric air pump according to claim 7, characterized in that: The small air passage of the rubber sleeve is arranged toward the second valve body, and the top core of the second valve body extends into the small air passage and the large air passage to form a Schrader valve.

9. The electric air pump according to claim 7, characterized in that: The large air passage of the rubber sleeve is arranged toward the second valve body, and the top core of the second valve body is arranged toward the first valve body, forming a Presta valve.

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