Compact active heat dissipation brushless motor inflator pump core

Abstract

The utility model belongs to the technical field of inflator pumps, and particularly relates to a compact active heat dissipation brushless motor inflator pump core. The utility model discloses a compact active heat dissipation brushless motor inflator pump core. The core comprises a shell; the brushless motor is provided with a motor shell and a motor shaft, fan blades are arranged at the end of the motor shaft, a first gear is arranged on the motor shaft, and the first gear is located between the fan blades and the motor shell; the piston assembly comprises a piston rod, a cylinder body and a second gear, the piston rod can do reciprocating motion in the cylinder body to achieve pressure feeding of gas, the piston rod is located at the axial end of the second gear, the piston rod and the second gear are connected through an eccentric shaft, and the second gear is meshed with the first gear; the telescopic direction of the piston rod in the cylinder body is perpendicular to the axial direction of the motor shaft. The LED lamp has the advantages of being more compact in structure and good in heat dissipation effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of inflator pump, especially relates to a compact active heat dissipation brushless motor inflator pump movement. BACKGROUND

[0002] The core working principle of the inflator pump as a kind of mechanical equipment is to compress and discharge air by motor-driven piston or vane mechanism to achieve the purpose of inflation. In this process, due to the compression of air, the friction of mechanical parts and the operation of motor, certain energy loss will be generated, and most of the lost energy will be converted into heat energy. The existing electric inflator pump usually sets a fan to achieve the effect of rapid heat dissipation.

[0003] For example, the Chinese patent with application number 202420454223.4 discloses a small-sized vehicle-mounted inflator pump. The motor shaft of the motor is connected with a fan and a piston assembly at both ends respectively, and the fan is used to dissipate heat from the entire device.

[0004] However, in the above-mentioned scheme, since the fan and the piston assembly are arranged in the same axial direction, the overall axial length is relatively long, so the axial length of the entire shell needs to be made longer, and the structure is poor in compactness. CONTENT OF THE UTILITY MODEL

[0005] To solve the problems in the prior art, an inflator pump with more compact structure and better heat dissipation effect is provided.

[0006] The utility model adopts the following technical solutions to achieve the above-mentioned purposes: a compact active heat dissipation brushless motor inflator pump movement, comprising:

[0007] a shell;

[0008] a brushless motor provided with a motor housing and a motor shaft, the end of the motor shaft is provided with a fan blade, a first gear is arranged on the motor shaft, and the first gear is located between the fan blade and the motor housing; and

[0009] a piston assembly comprising a piston rod, a cylinder body and a second gear, the piston rod can reciprocate in the cylinder body to realize the compression and delivery of gas, the piston rod is located at one end of the axial direction of the second gear and connected with the second gear through an eccentric shaft, the second gear is engaged with the first gear, and the extension and retraction direction of the piston rod in the cylinder body is perpendicular to the axial direction of the motor shaft.

[0010] In use, the rotation of the motor shaft of the brushless motor will drive the rotation of the first gear, the rotation of the first gear will drive the rotation of the second gear, and the rotation of the second gear will drive the reciprocating motion of the piston rod in the cylinder body to achieve the effect of inflation. At the same time, the fan blade will rotate with the motor shaft to discharge heat.

[0011] The fan and the first gear are arranged at one end of the motor shaft, and the second gear needs to mesh with the first gear, so the arrangement position of the piston rod and the cylinder body can only be on one side of the motor shaft, and the extension direction of the piston rod is perpendicular to the extension direction of the motor shaft; this arrangement reduces the overall space occupied by the motor shaft in the axial direction, and the shell does not need to be made too long. Due to the compact structure, the space will certainly be smaller, so the heat inside is blown out through the rotation of the fan, thereby avoiding the temperature inside the shell being too high. The driving device of the present scheme adopts a brushless motor. Compared with the existing brush motor, the brushless motor has no carbon brush, its structure is more compact, has a longer service life, and is quieter.

[0012] As a preferred, the piston rod does eccentric rotation on the second gear, when the piston rod moves to the limit position away from the cylinder body, the connecting end of the piston rod and the second gear is located between the fan and the first gear.

[0013] Through the arrangement in this way, the space between the fan and the first gear can be further utilized, thereby the length of the entire piston and cylinder body can be further reduced, so that the volume of the entire shell can be made smaller, and the structure is more compact.

[0014] As a preferred, the brushless motor is an external rotor brushless motor.

[0015] The design of the external rotor brushless motor makes the permanent magnet located on the shell of the motor, thereby the space can be more effectively utilized, and higher power density can be provided. This design helps to achieve higher performance output in a compact space; and the heat dissipation path of the external rotor brushless motor is shorter, and the external air is easier to circulate, thereby improving the heat dissipation efficiency. The improvement of the heat dissipation performance helps to prolong the service life of the motor and maintain stable performance output.

[0016] As a preferred, one end of the cylinder body is fixed with a connecting frame, the external rotor brushless motor and the second gear are arranged on the connecting frame, the external rotor brushless motor is provided with a bearing support extending out of the motor shell, the motor shaft passes through the connecting frame, the bearing support is fixed on the connecting frame, a connecting shaft is arranged at the center of the second gear, and the connecting shaft is rotatably arranged on the connecting frame through a bearing.

[0017] By fixing the connecting frame at one end of the cylinder body, the second gear and the external rotor brushless motor can be arranged on the connecting frame, so that other components do not need to be arranged in the shell to connect the second gear and the external rotor brushless motor, and the structure is more compact.

[0018] As a preferred, the shell further comprises a power supply, and the power supply and the motor shell of the brushless motor are located on the same side of the cylinder body and the connecting frame.

[0019] Because the power supply and the motor housing have large volume, the power supply and the motor housing are arranged on the same side, so that the space in the shell can be more reasonably utilized.

[0020] Preferably, a circuit board is further arranged in the shell, and the circuit board can be projected on the brushless motor, the cylinder, the connecting frame and the power supply.

[0021] The projection of the arrangement position of the circuit board can be on the brushless motor, the cylinder, the connecting frame and the power supply, so that the space in the shell can be further reasonably utilized, and the structure in the shell can be more compact.

[0022] Preferably, the shell is provided with a heat dissipation hole at least at a position corresponding to the fan blade.

[0023] The heat dissipation hole is arranged to facilitate heat dissipation.

[0024] Preferably, the cylinder comprises an air inlet cavity, a connecting cavity and an air outlet cavity, the air outlet cavity is communicated with the shell, the piston is matched with the air inlet cavity, the connecting cavity is used for connecting the air inlet cavity and the air outlet cavity, and the air inlet cavity, the connecting cavity and the air outlet cavity are arranged eccentrically.

[0025] Preferably, the inner wall of the air outlet cavity is provided with an internal thread structure.

[0026] The internal thread structure is used to realize the connection of the external air pipe.

[0027] Preferably, the air outlet cavity is matched with an air pressure sensor.

[0028] The air pressure sensor is arranged to detect the real-time air pressure.

[0029] Compared with the prior art, the utility model has the advantages of more compact structure, good heat dissipation effect, small noise and longer service life. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural schematic view of the utility model;

[0031] Figure 2 It is a structural schematic view of the utility model; Figure 1 It is a structural schematic view of the shell after removing a side shell wall;

[0032] Figure 3 It is a structural schematic view of the utility model after removing the circuit board; Figure 2

[0033] Figure 4 It is a structural schematic view of the connection between the cylinder and the brushless motor;

[0034] Figure 5 It is a structural schematic view of the connection between the cylinder and the brushless motor from another perspective; ​

[0035] Figure 6 for Figure 4 A sectional view.

[0036] Reference numerals: 1. Outer shell; 11. Air outlet; 12. Heat dissipation hole; 2. Circuit board; 3. Power supply; 4. Cylinder body; 41. Inlet chamber; 42. Connecting chamber; 43. Outlet chamber; 431. Pressure sensor; 5. Connecting bracket; 6. Brushless motor; 61. Motor shaft; 62. Motor housing; 63. Bearing bracket; 7. Piston rod; 71. Connecting groove; 8. Fan blade; 91. First gear; 92. Second gear; 921. Connecting shaft; 922. Bearing; 923. Connecting hole. Detailed Implementation

[0037] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 6 As shown, this embodiment discloses a compact active cooling brushless motor air pump mechanism, including a housing 1. Inside the housing 1 are a circuit board 2, a power supply 3, a cylinder 4, a connecting frame 5, and a brushless motor 6. Several buttons are provided on the front side of the housing 1, and these buttons are electrically connected to the circuit board 2 on the inner side. The circuit board 2 is located in front of the power supply 3, piston assembly, connecting frame 5, and brushless motor 6, and its rear projection is projected onto the power supply 3, piston assembly, connecting frame 5, and brushless motor 6.

[0039] The piston assembly comprises a cylinder 4 and a piston rod 7, the cylinder 4 is fixed on the shell 1 by screws, and the right side of the cylinder 4 is fixedly connected with a connecting frame 5; the power supply 3 and the brushless motor 6 are located on the lower side of the cylinder 4 and the connecting frame 5. The connecting frame 5 is provided with the brushless motor 6 and a second gear 92. The brushless motor 6 is an outer rotor brushless motor, which comprises a rotatable motor housing 62, a permanent magnet is arranged on the inner wall of the motor housing 62, the motor housing 62 is fixed with a motor shaft 61, the motor shaft 61 is rotatably connected to a bearing support 63 through a bearing, the bearing support 63 extends outward to the outside of the motor housing 62 and is fixed to the lower end of the connecting frame 5 to realize the fixation of the whole brushless motor 6. A through hole is arranged on the connecting frame, the motor shaft 61 passes through the through hole and extends to the upper side of the connecting frame. The motor shaft 61 is fixed with a first gear 91, the end of the motor shaft 61 is fixed with a fan blade 8, the first gear 91 is located on the upper side of the connecting frame 5 and between the fan blade 8 and the motor housing 62, the part of the shell 1 corresponding to the fan blade 8 and the part corresponding to the cylinder 4 are both provided with heat dissipation holes 12. The second gear 92 is located on the left side of the first gear 91 and meshes with the first gear 91. A connecting shaft 921 is arranged at the center of the second gear 92 and rotatably arranged on the connecting frame 5 through a bearing 922. The diameter of the second gear 92 is greater than that of the first gear 91 to have a reduction effect. The extension direction of the piston rod 7 is the left-right direction, and the extension direction of the motor shaft 61 is the up-down direction, and the two are perpendicular to each other in the direction.

[0040] The piston rod 7 is located on the upper side of the second gear 92, the right end of the piston rod 7 is provided with a connecting groove 71, the second gear 92 is eccentrically provided with a connecting hole 923, the connecting groove 71 and the connecting hole 923 are connected through an eccentric shaft (not shown in the figure) to realize the linkage between the piston rod 7 and the second gear 92. The cylinder 4 comprises, from left to right, an air inlet chamber 41, a connecting chamber 42 and an air outlet chamber 43; the air outlet chamber 43 is in communication with the air outlet 11 of the shell 1, the connecting chamber 42 is used for connecting the air inlet chamber 41 and the air outlet chamber 43, and the air inlet chamber 41, the connecting chamber 42 and the air outlet chamber 43 are eccentrically arranged. The air outlet chamber 43 is matched with an air pressure sensor 431, and the inner wall thereof has an internal thread structure (not shown in the figure) for connecting an external air pipe.

[0041] The left end of the piston rod 7 makes piston movement in the air inlet chamber 41, when the second gear 92 rotates, the piston rod 7 starts to make eccentric reciprocating motion, and when the piston rod 7 moves to the limit position away from the cylinder 4, the connecting end of the piston rod 7 (the right end of the piston rod 7) is located between the fan blade 8 and the first gear 91.

Claims

1. A compact active heat-dissipation brushless motor air pump movement, characterized in that, The utility model relates to a kind of air compressor, including: Shell; Brushless motor, which is provided with motor housing and motor shaft, the end of the motor shaft is provided with fan blade, the first gear is provided on the motor shaft, and the first gear is located between fan blade and motor housing;And Piston assembly, which includes piston rod, cylinder and second gear, the piston rod can reciprocate in the cylinder to realize the pressure of gas, the piston rod is located at the axial end of the second gear and connected by eccentric shaft between the two, the second gear is engaged with the first gear, and the extension direction of the piston rod in the cylinder is perpendicular to the axial direction of the motor shaft; The brushless motor is an outer rotor brushless motor, one end of the cylinder is fixed with connecting frame, the outer rotor brushless motor and the second gear are arranged on the connecting frame, the outer rotor brushless motor is provided with bearing support extending outside the motor housing, the motor shaft passes through the connecting frame, the bearing support is fixed on the connecting frame, the center of the second gear is provided with connecting shaft, and the connecting shaft is rotatably arranged on the connecting frame by bearing.

2. The compact active heat dissipating brushless motor air pump movement according to claim 1, characterized in that: The connecting end of the piston rod and the second gear makes circular motion on the second gear, when the piston rod moves to the limit position away from the cylinder, the connecting end of the piston rod and the second gear is located between the fan blade and the first gear.

3. The compact active heat dissipating brushless motor air pump movement according to claim 1, characterized in that: The shell is also provided with power supply, and the power supply and the motor housing of the brushless motor are located on the same side of the cylinder and the connecting frame.

4. The compact active heat sink brushless motor air pump movement according to claim 1, characterized in that: The shell is also provided with circuit board, and the projection of the circuit board is located on the brushless motor, the cylinder, the connecting frame and the power supply.

5. The compact active heat dissipating brushless motor air pump movement according to any one of claims 1 to 4, characterized in that: The shell is provided with heat dissipation hole at least at the position corresponding to the fan blade.

6. The compact active heat dissipating brushless motor air pump movement according to any one of claims 1 to 4, characterized in that: The cylinder includes air inlet cavity, connecting cavity and air outlet cavity, the air outlet cavity is communicated with the shell, the piston cooperates with the air inlet cavity, the connecting cavity is used for connecting the air inlet cavity and the air outlet cavity, and the air inlet cavity, the connecting cavity and the air outlet cavity are eccentrically arranged.

7. The compact active heat dissipating brushless motor air pump movement according to claim 6, characterized in that: The inner wall of the air outlet cavity has internal thread structure.

8. The compact active heat dissipating brushless motor air pump movement according to claim 6, characterized in that: The air outlet cavity is matched with air pressure sensor.

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