Miniature inflator pump with active heat dissipation function

Abstract

The utility model provides a miniature inflator pump with an active heat dissipation function. The miniature inflator pump comprises a shell, a motor, a cam and a piston, wherein the motor, the cam and the piston are arranged in the shell; the motor is provided with an output shaft, and the output shaft is connected with the cam; the piston is provided with a piston rod and a piston cylinder; the cam is rotationally connected with one end of the piston rod, and the other end of the piston rod extends into the piston cylinder; an air outlet hole is formed in the shell, and the air outlet end of the piston cylinder is communicated with the air outlet hole; moreover, a plurality of heat dissipation blades are arranged on the periphery of the cam, and heat dissipation holes are formed in the positions, corresponding to the heat dissipation blades, of the shell. According to the utility model, heat generated when the motor and the piston work can be quickly discharged, and the situation that the temperature in the shell is too high to affect the operation of the motor is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of inflator heat dissipation, in particular to a miniature inflator with active heat dissipation. Background Art

[0002] An inflator, also known as an air compressor or a gas pump, is commonly used to inflate automobile tires. It drives a piston by the operation of an internal motor to achieve air extraction and inflation. Inside the inflator housing, heat is generated both by the operation of the motor and the reciprocating motion of the piston rod. However, the existing inflators are very small in size, and there is no space inside the housing to install a radiator. The heat inside the housing cannot be quickly discharged, resulting in a rapid increase in the internal temperature of the housing, which causes the motor temperature to be too high and easily burns out the motor. Content of the Utility Model

[0003] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a miniature inflator with active heat dissipation, which can quickly discharge the heat generated when the motor and the piston work, and avoid the internal temperature of the housing being too high, affecting the operation of the motor.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A miniature inflator with active heat dissipation is proposed, which includes a housing and a motor, a cam and a piston arranged inside the housing; the motor has an output shaft, and the output shaft is connected to the cam; the piston has a piston rod and a piston cylinder; one end of the cam is rotatably connected to one end of the piston rod, and the other end of the piston rod extends into the piston cylinder; an air outlet hole is arranged on the housing, and the air outlet end of the piston cylinder is communicated with the air outlet hole; and, a plurality of heat dissipation fins are arranged on the outer periphery of the cam, and heat dissipation holes are arranged on the housing corresponding to the positions of the heat dissipation fins.

[0006] The utility model proposes a miniature inflator with active heat dissipation. Compared with the prior art, its beneficial effects are as follows:

[0007] The miniature air pump with active heat dissipation of the present utility model has a motor, a cam, and a piston all disposed inside a housing. The motor has an output shaft which is connected to the cam. The piston has a piston rod and a piston cylinder. The cam is rotatably connected to one end of the piston rod, and the other end of the piston rod extends into the piston cylinder. An air outlet hole is provided on the housing, and the air outlet end of the piston cylinder is communicated with the air outlet hole. When the motor operates, it can drive the piston rod to move. One end of the piston rod can reciprocate inside the piston cylinder to achieve air extraction and inflation. The gas can flow from the air outlet end of the piston cylinder to the air outlet hole of the housing and then to the object to be inflated. Moreover, a plurality of heat dissipation fins are provided on the outer periphery of the cam, and heat dissipation holes are provided on the housing corresponding to the positions of the heat dissipation fins. When the motor drives the cam to rotate and drives the piston rod to move, the heat dissipation fins of the cam rotate synchronously. The heat generated when the motor and the piston work can be conducted out by the heat dissipation fins and discharged from the heat dissipation holes on the housing, and will not accumulate inside the housing, thus preventing the internal temperature of the housing from being too high and affecting the operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 FIG. 6 is a schematic structural diagram of a miniature air pump with active heat dissipation according to an embodiment of the present utility model;

[0009] Figure 2 is Figure 1 a schematic internal structure diagram of a miniature air pump with active heat dissipation shown in FIG. 6;

[0010] Figure 3 is Figure 1 a schematic internal structure sectional view of a miniature air pump with active heat dissipation shown in FIG. 6;

[0011] Figure 4 is Figure 1 a schematic structural diagram of the cam of a miniature air pump with active heat dissipation shown in FIG. 6;

[0012] Among them, the meanings of the reference numerals are as follows:

[0013] 1. Housing; 2. Motor; 3. Cam; 4. Piston; 5. Output shaft; 6. Piston rod; 7. Piston cylinder; 8. Air outlet hole; 9. Heat dissipation fin; 10. Heat dissipation hole; 11. Connection part; 12. Connection hole; 13. Fastening bolt hole; 14. Battery. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0015] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0017] like Figures 1-4 As shown in the figure, the embodiment of the utility model proposes a micro air pump with active heat dissipation, including a shell 1 and a motor 2, a cam 3 and a piston 4 arranged inside the shell 1; the motor 2 has an output shaft 5, and the output shaft 5 is connected to the cam 3; the piston 4 has a piston rod 6 and a piston cylinder 7; the cam 3 is rotatably connected to one end of the piston rod 6, and the other end of the piston rod 6 extends into the piston cylinder 7; an air outlet hole 8 is provided on the shell 1, and the air outlet end of the piston cylinder 7 is connected to the air outlet hole 8; and a plurality of heat dissipation blades 9 are provided on the outer periphery of the cam 3, and heat dissipation holes 10 are provided on the shell 1 at positions corresponding to the heat dissipation blades 9.

[0018] Based on the above technical scheme, the utility model of the active heat dissipation micro air pump, its motor 2, cam 3 and piston 4 are all arranged inside the shell 1, the motor 2 has an output shaft 5, the output shaft 5 is connected to the cam 3, the piston 4 has a piston rod 6 and a piston cylinder 7, the cam 3 is rotatably connected to one end of the piston rod 6, the other end of the piston rod 6 extends into the piston cylinder 7, the shell 1 is provided with an air outlet 8, the air outlet end of the piston cylinder 7 is connected to the air outlet 8; the operation of the motor 2 can drive the piston rod 6 to move, and one end of the piston rod 6 can reciprocate inside the piston cylinder 7 to achieve air extraction and air pumping. The air can flow from the air outlet end of the piston cylinder 7 to the air outlet hole 8 of the shell 1, and flow to the object that needs to be inflated; and, a plurality of heat dissipation blades 9 are arranged on the outer periphery of the cam 3, and heat dissipation holes 10 are arranged on the shell 1 at positions corresponding to the heat dissipation blades 9. When the motor 2 drives the cam 3 to rotate and drives the piston rod 6 to move, the heat dissipation blades 9 of the cam 3 rotate synchronously. The heat generated by the motor 2 and the piston 4 during operation can be conducted out by the heat dissipation blades 9 and discharged from the heat dissipation holes 10 on the shell 1, and will not accumulate inside the shell 1, thereby preventing the internal temperature of the shell 1 from being too high and affecting the operation of the motor 2.

[0019] In some possible implementation manners, in order to better discharge the heat generated when the motor 2 and the piston 4 work, and at the same time, ensure that the heat dissipation fins 9 do not interfere with the reciprocating movement of the piston rod 6, the middle part of the cam 3 is connected to the output shaft 5 of the motor 2, the output shaft 5 of the motor 2 and the piston rod 6 are connected to different sides of the cam 3, the positions of the cam 3 deviating from its middle part are respectively provided with a connecting part 11 and heat dissipation fins 9, the connecting part 11 is connected to the piston rod 6, and the heat dissipation fins 9 are arranged opposite to the connecting part 11. In this way, when the heat dissipation fins 9 rotate following the cam 3, they will not touch the piston rod 6 and will not affect the reciprocating movement of the piston rod 6.

[0020] Further, a connecting hole 12 is provided in the middle part of the cam 3, the output shaft 5 of the motor 2 is connected to the inside of the connecting hole 12, a part of the contour of the cross-section of the connecting hole 12 is a straight line, and correspondingly, a part of the outer periphery of the output shaft 5 of the motor 2 is flat. This can ensure that the motor 2 can drive the cam 3 to rotate smoothly through its output shaft 5. And, in order to ensure that heat can be quickly exported and reduce the influence of the eccentric rotation of the cam 3 on the output shaft 5 of the motor 2, the heat dissipation fins 9 are arranged around the connecting hole 12 and are evenly spaced. The thickness of the heat dissipation fins 9 gradually increases from the end close to the connecting hole 12 to the end far from the connecting hole 12.

[0021] A fastening bolt hole 13 is also provided on the cam 3. The fastening bolt hole 13 is an opening between two adjacent heat dissipation fins 9 and the fastening bolt hole 13 communicates with the connecting hole 12.

[0022] Threads are provided inside the fastening bolt hole 13, and a bolt can be screwed into the inside of the fastening bolt hole 13. The bolt fastens the output shaft 5 of the motor 2 inside the connecting hole 12, which can ensure that the output shaft 5 of the motor 2 is stably connected to the inside of the connecting hole 12 and will not fall off from the inside of the connecting hole 12, ensuring the smooth transmission of power between the motor 2 and the cam 3.

[0023] At the same time, in order to reduce the eccentric torque received when the output shaft 5 of the motor 2 rotates, reduce the fatigue of the motor 2, and ensure that the motor 2 can be put into use for a long time, on the cam 3, the number of heat dissipation fins 9 on both sides of the fastening bolt hole 13 is equal.

[0024] The heat dissipation fins 9 of the cam 3 can export the air inside the housing 1, and the exported air carries heat. In some possible implementation manners, in order to ensure that the air can be smoothly exported and the air flow does not become disordered, a plurality of heat dissipation holes 10 are provided on the housing 1. The plurality of heat dissipation holes 10 are arranged in an array, and the air can be evenly discharged from these heat dissipation holes 10 under the push of the heat dissipation fins 9.

[0025] Moreover, in order not to affect the workers' inflation operation, the hot air discharged through the heat dissipation holes 10 needs to avoid the workers. According to the daily operation specifications of the workers, the air outlet 8 should communicate with the object to be inflated. On the housing 1, the air outlet 8 and the heat dissipation holes 10 need to be distributed on different sides of the housing 1 to prevent the hot air coming out of the heat dissipation holes 10 from affecting the workers' operation.

[0026] It should also be noted here that the air inside the piston cylinder 7 is pressed into the air outlet 8 from its air outlet end and enters the object to be inflated. The piston cylinder 7 needs to be replenished with air. As the piston rod 6 moves, a negative pressure is formed inside the piston cylinder 7, and the air inside the housing 1 will enter the inside of the piston cylinder 7, and a negative pressure is formed inside the housing 1. At this time, due to the assembly error and processing error of the housing 1, there are gaps on the housing 1, and air can enter the inside of the housing 1 through these gaps. There is no need to open additional holes in the housing 1. Repeatedly, the air inside the housing 1 is continuously replenished. Moreover, the air entering from the gaps of the housing 1 does not conflict with the hot air dissipated through the heat dissipation holes 10. After the air inside the piston cylinder 7 is pressed out, it is continuously replenished. Thus, inflation of the object to be inflated is achieved.

[0027] Specifically, the motor 2 can be connected to an external power source such as mains electricity. A battery 14 can also be provided inside the housing 1. The battery 14 is electrically connected to the motor 2. Moreover, in order to make reasonable use of the space inside the housing 1, the battery 14 and the piston 4 are respectively arranged on opposite sides of the motor 2.

[0028] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A micro air pump with active heat dissipation, characterized in that, It includes a housing and a motor, a cam and a piston disposed inside the housing; The motor has an output shaft, and the output shaft is connected to the cam; The piston has a piston rod and a piston cylinder; The cam is rotatably connected to one end of the piston rod, and the other end of the piston rod extends into the piston cylinder; An air outlet hole is provided on the housing, and the air outlet end of the piston cylinder is communicated with the air outlet hole; Moreover, a plurality of heat dissipation blades are provided on the outer periphery of the cam, and heat dissipation holes are provided on the housing at positions corresponding to the heat dissipation blades.

2. The micro air pump with active heat dissipation according to claim 1, characterized in that, The middle part of the cam is connected to the output shaft of the motor. The connecting part and the heat dissipation blades are respectively provided at positions of the cam deviating from its middle part. The connecting part is connected to the piston rod, and the heat dissipation blades are arranged opposite to the connecting part.

3. The micro air pump with active heat dissipation according to claim 2, characterized in that, A connecting hole is provided in the middle part of the cam, and the output shaft of the motor is connected to the inside of the connecting hole. The heat dissipation blades surround the connecting hole and are evenly distributed at intervals.

4. The miniaturized inflator with active heat dissipation according to claim 3, characterized in that, The thickness of the heat dissipation blade gradually increases from the end close to the connecting hole to the end far from the connecting hole.

5. The micro air pump with active heat dissipation according to claim 3, wherein A fastening bolt hole is also provided on the cam. The fastening bolt hole is an opening between two adjacent heat dissipation blades, and the fastening bolt hole is communicated with the connecting hole.

6. The miniaturized inflator with active heat dissipation according to claim 5, characterized in that The number of the heat dissipation blades on both sides of the fastening bolt hole is equal.

7. The micro air pump with active heat dissipation according to claim 1, wherein A plurality of the heat dissipation holes are provided on the housing, and the plurality of heat dissipation holes are arranged in an array.

8. The micro air pump with active heat dissipation according to claim 1, characterized in that, The air outlet hole and the heat dissipation hole are distributed on different sides of the housing.

9. The mini inflator pump with active heat dissipation according to claim 1, wherein A battery is further provided inside the housing, and the battery is electrically connected to the motor.

10. The micro air pump with active heat dissipation according to claim 9, characterized in that, The battery and the piston are respectively arranged on opposite sides of the motor.

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