A compact brushless motor inflator pump

Abstract

The utility model discloses a compact brushless motor air pump belongs to portable air pump technical field. The air pump includes shell module, core module, control circuit board and battery. The core module contains brushless motor, install on the high reduction ratio gear set of support board and piston cylinder mechanism, and gear set will motor high speed be converted into the low speed of driving piston required, big torque, realize the high pressure gas output under small size. Control circuit board has integrated intelligent control and monitoring function, and the key and display screen on the shell are combined, and the target air pressure preset, state display and automatic stop filling are supported. The battery is built -in and provides the charging interface, realizes wireless portable operation. The shell is equipped with the cooling hole of alignment brushless motor, forms effective heat dissipation air duct. The utility model solves the problem that the size, torque, intelligentization, heat dissipation and portability are difficult to take into account in the prior art.

Description

Technical Field

[0001] This utility model relates to portable air pump technology, and more particularly to a compact brushless motor air pump. Background Technology

[0002] Air pumps, as small power devices that convert mechanical energy into gas pressure energy, have been widely used for portable inflation operations in fields such as automobile tires, sports equipment, and inflatable toys. Their technological development mainly revolves around core dimensions such as power source efficiency, structural compactness, operational reliability, and intelligent operation.

[0003] Early mainstream products generally used brushed DC motors as their power core. While these motors were inexpensive, they had inherent drawbacks: the brushes and commutator experienced wear and sparking during high-speed operation, resulting in a shorter lifespan, significant electromagnetic interference, and high operating noise. Furthermore, the size and weight of the motor itself were difficult to further reduce. In terms of structural design, traditional air pumps often used a layout where the motor and cylinder axes were parallel or at an angle, with the transmission path relying on crankshafts and connecting rods or multi-stage gear sets. This resulted in long axial dimensions, low internal space utilization, and a bulky overall structure, making it difficult to meet the growing demand for extreme portability.

[0004] To address these issues, the industry is gradually shifting towards brushless motor technology and focusing on optimizing structural layout. For example, Chinese patent document CN222415110U discloses an L-shaped air pump. In this patent, the brushless motor, mounting base, and air cylinder are arranged in an L-shape, and a driven gear disk is directly driven by the driving gear on the motor's output shaft, thereby driving the piston rod to achieve linear reciprocating motion. This shortens the transmission chain, simplifies the structure, and utilizes the spatial depth through the L-shaped corner, reducing the product's planar projected area, which is of positive significance.

[0005] However, after in-depth analysis, the existing technical solution still has several obvious limitations, which restrict its performance and user experience in high-end portable application scenarios:

[0006] The existing technology is a purely mechanical power unit, without any integrated electronic control system, status sensing module, or human-machine interface. Users cannot preset the target air pressure, monitor the inflation process in real time, or achieve automatic stopping after the set value is reached. Its operation relies entirely on the user's experience and judgment, which carries the risk of over-inflation or under-inflation. It has a low level of intelligence and lacks sufficient safety and convenience.

[0007] Inadequate heat dissipation design impacts continuous operating performance: The solution fails to address heat dissipation measures for brushless motors operating under high loads for extended periods in enclosed or compact spaces. If motor heat cannot be dissipated promptly, it can lead to excessive internal temperature rise, potentially triggering overheat protection and causing shutdown. This can also affect component lifespan and long-term reliability, limiting the product's continuous operating time and power density.

[0008] While the integrated design of the air cylinder and exhaust cylinder helps reduce interface leakage, the assembly precision and coaxiality of the gear and piston rod depend on the cumulative tolerances of the machining and assembly of multiple parts. In the absence of a high-precision integrated support structure, the long-term sealing performance and transmission efficiency stability between the piston and cylinder face challenges, potentially leading to energy loss and pneumatic efficiency degradation.

[0009] Limited functionality and lack of an integrated solution: This solution does not include a built-in power supply, charging management module, or external interface, and relies on external power supply. It cannot achieve true wireless and portable operation, which falls short of the current market's expectations for integrated and mobile inflatable tools.

[0010] In summary, while existing technologies have achieved compactness in physical layout, significant technological gaps remain in areas such as deep optimization of power transmission efficiency, integration of intelligent control systems, reliable thermal management design, and the completeness of mechatronics integration. Therefore, the market urgently needs a novel air pump solution that, within an extremely compact size, not only achieves efficient high-pressure output but also possesses intelligent control, long battery life, and reliable heat dissipation capabilities, driving the evolution of portable air inflators towards higher performance and a superior user experience. This constitutes the starting point of this utility model's technical solution and the core technical problem it aims to solve. Utility Model Content

[0011] To address the shortcomings of the existing technology, this invention proposes a compact brushless motor air pump.

[0012] The technical solution of this utility model is implemented as follows:

[0013] A compact brushless motor air pump, characterized in that it comprises:

[0014] The outer casing module has an internal storage space.

[0015] The movement module is installed within the receiving space of the outer casing module;

[0016] The movement module includes:

[0017] Brushless motor;

[0018] The support plate is fixedly installed inside the outer shell module;

[0019] The gear transmission mechanism includes a first gear and a second gear that mesh with each other. The first gear is connected to the output shaft of the brushless motor, and the number of teeth of the second gear is greater than the number of teeth of the first gear to form a high reduction ratio transmission.

[0020] A piston cylinder mechanism includes a cylinder and a piston rod. The cylinder is mounted on the support plate and has an internal air chamber. The piston rod is slidably disposed within the air chamber.

[0021] The piston rod is eccentrically connected to the second gear, so that the rotational motion of the second gear is converted into the linear reciprocating motion of the piston rod in the air chamber.

[0022] A control circuit board is installed inside the housing module and is electrically connected to the brushless motor to control the start and stop of the brushless motor.

[0023] The battery, installed inside the housing module, supplies power to the brushless motor and the control circuit board.

[0024] In this compact brushless motor air pump of the present invention, the reduction ratio between the first gear and the second gear is not less than:

[0025] In this compact brushless motor air pump of the present invention, the outer shell module is provided with heat dissipation holes, and the position of the heat dissipation holes is opposite to the position of the brushless motor to form a heat dissipation air duct for the brushless motor.

[0026] In this compact brushless motor air pump of the present invention, the control circuit board integrates an air pressure sensing module and / or a current and voltage monitoring module. The control circuit board is configured to control the inflation process according to a preset air pressure target value and automatically stop the brushless motor when the target value is reached.

[0027] In this compact brushless motor air pump of the present invention, the buttons and the display screen on the housing module are electrically connected to the control circuit board.

[0028] In this compact brushless motor air pump of the present invention, the support plate serves as an integrated mounting base plate, and the brushless motor, the rotating shaft of the gear transmission mechanism, and the cylinder are all directly or indirectly fixedly mounted on the support plate to ensure the coaxiality between the piston rod and the cylinder.

[0029] In this compact brushless motor air pump of the present invention, the control circuit board integrates a battery management system and a charging interface, the charging interface being used to charge the battery.

[0030] In this compact brushless motor air pump of the present invention, the housing module includes a first housing and a second housing that are detachably connected. The core module is mainly installed inside the second housing, and the control circuit board and battery are installed inside the first housing and / or the second housing.

[0031] In this compact brushless motor air pump of the present invention, the cylinder is provided with an air hole communicating with the air chamber, and the outer shell module is provided with a connection port, and the air hole and the connection port are in fluid communication.

[0032] The compact brushless motor air pump of this utility model has the following beneficial effects:

[0033] By using a high reduction ratio gear set, the high speed and low torque output of the brushless motor is converted into a low speed and high torque suitable for driving the piston, thereby achieving a high pressure output (≥35 PSI) sufficient to inflate car tires in a small volume, solving the problem of insufficient torque in a compact space in traditional solutions.

[0034] It integrates a control circuit board, display screen, buttons and battery management system, and supports functions such as preset inflation target, real-time status monitoring, automatic charging stop and overload protection, which improves the convenience and safety of use.

[0035] A directional cooling airflow is designed within the compact chassis, with the cooling vents directly facing the brushless motor area. This utilizes the motor's own airflow and air convection to achieve efficient passive cooling, significantly reducing the cost of core components. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the compact brushless motor air pump of this utility model;

[0037] Figure 2 This is an exploded schematic diagram of the compact brushless motor air pump of this utility model.

[0038] Figure 3 This is a partial structural schematic diagram of the compact brushless motor air pump of this utility model;

[0039] Figure 4 This is a partial structural schematic diagram of the compact brushless motor air pump of this utility model;

[0040] Figure 5 This is a partial structural schematic diagram of the compact brushless motor air pump of this utility model.

[0041] The reference numerals in the attached drawings are as follows: 10-outer shell module, 101-first outer shell, 102-second outer shell, 103-connection port, 104-control circuit board, 105-charging interface, 106-button cap, 107-button body, 108-observation window, 109-display screen, 110-heat dissipation hole, 111-battery, 20-mechanical module, 201-brushless motor, 202-support plate, 203-first gear, 204-second gear, 205-piston rod, 206-cylinder, 207-air hole, 208-air chamber. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0043] Reference Figures 1 to 5 As shown, this embodiment proposes a compact brushless motor air pump, including a housing module 10 and a core module 20.

[0044] The outer casing module 10 includes a first outer casing 101 and a second outer casing 102, which are snapped together. The movement module 20 is installed inside the second outer casing 102. A control circuit board 104 is also installed inside the second outer casing 102.

[0045] The first outer casing 101 is provided with a button cap 106 and an observation window 108, and the control circuit board 104 is provided with a button body 107 and a display screen 109. The button cap 106 is connected to the button body 107, and the observation window 108 is connected to the display screen 109. Through the cooperation of the button body 107 and the control circuit board 104, the start / stop and output power of the mechanism module 20 are controlled, and the control structure is output through the display screen 109.

[0046] Furthermore, a battery 111 is installed inside the second housing 102, and the battery 111 is connected to the movement module 20. The control circuit board 104 is also provided with a charging interface 105, which is used to charge the battery 111.

[0047] In this embodiment, the mechanism module 20 includes a brushless motor 201 and a support plate 202. The support plate 202 is installed inside the second housing 102, and the brushless motor 201 is installed on one side of the support plate 202. The support plate 202 is rotatably connected to a first gear 203 and a second gear 204 that mesh with each other. The output shaft of the brushless motor 201 is connected to the first gear 203. The second gear 204 has a significantly larger number of teeth than the first gear 203.

[0048] Furthermore, a cylinder 206 is provided on the top of the support plate 202, and an air chamber 208 is provided inside the cylinder 206. The air chamber 208 is connected to an air hole 207. A piston rod 205 is slidably connected inside the air chamber 208. The piston rod 205 reciprocates up and down and exhausts air outward through the air hole 207. The piston rod 205 is eccentrically mounted with the second gear 204. When the second gear 204 rotates, it can drive the piston rod 205 to reciprocate up and down.

[0049] The vent 207 is connected to the connection port 103 on one side of the second outer shell 102. The gas discharged from the vent 207 is connected to the conduit through the connection port 103 to inflate the external equipment.

[0050] Preferably, a heat dissipation hole 111 is also provided on one side of the second housing 102. The heat dissipation hole 111 is opposite to the brushless motor 201 to prevent the heat generated by the brushless motor 201 from accumulating in the second housing 102 and to dissipate heat.

[0051] In this embodiment, the control circuit board 104 drives the brushless motor 201 to rotate. The motor output shaft drives the first gear 203 to rotate, and through meshing with the second gear 204, which has a much larger number of teeth, a high reduction ratio, such as 1:10 or higher, is achieved. This process converts the high-speed, low-torque output of the motor into a low-speed, high-torque output suitable for driving the piston. It directly replaces the inefficient and short-life brushed motor; and by optimizing the gear ratio within a compact space, it solves the contradiction between small size and high torque output. It can generate high pressure sufficient to inflate car tires to ≥35 PSI in a small volume.

[0052] The eccentric shaft of the second gear 204 is hinged to the piston rod 205, converting the rotational motion into precise linear reciprocating motion of the piston rod within the cylinder 206. When the piston moves downward, a negative pressure is created in the air chamber 208, drawing in air through the air passage; when the piston moves upward, compressed air creates a positive pressure, and finally, the compressed air is discharged through the air hole 207 and the connection port 103. All moving parts are integrated onto the support plate 202, ensuring extremely high coaxiality and assembly precision, solving the problems of poor airtightness and large energy loss that are common in traditional decentralized assembly. High airtightness and high inflation efficiency more effectively convert mechanical energy into air pressure energy, significantly increasing the inflation speed.

[0053] Pressing button cap 106 triggers button body 107, sending a command to control circuit board 104. The circuit board intelligently adjusts the power of brushless motor 201 and monitors system status pressure, current, and battery voltage in real time. Operating information is displayed on screen 109 and can be viewed through observation window 108. Battery 111 provides power and can be charged via charging interface 105. This system achieves intelligent control, moving from manual operation based on experience to preset targets and automatic stop; it can also incorporate multiple circuit protections such as overload, overcurrent, and undervoltage protection.

[0054] Preferably, the first housing 101 and the second housing 102 are snapped together to form a compact chassis. The heat dissipation vent 110 faces the area of ​​the brushless motor 201, utilizing the airflow from the motor operation and air convection to form a passive heat dissipation channel. This effectively reduces the operating temperature of core components, allowing continuous working time to be extended by more than 50%, and ensuring stability and device lifespan under high power conditions.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A compact brushless motor air pump, characterized in that, include: The outer shell module (10) has an internal accommodating space; The movement module (20) is installed within the receiving space of the outer casing module (10); The movement module (20) includes: Brushless motor (201); The support plate (202) is fixedly installed inside the outer shell module (10); The gear transmission mechanism includes a first gear (203) and a second gear (204) that mesh with each other. The first gear (203) is connected to the output shaft of the brushless motor (201). The number of teeth of the second gear (204) is greater than the number of teeth of the first gear (203) to form a high reduction ratio transmission. The piston cylinder mechanism includes a cylinder (206) and a piston rod (205). The cylinder (206) is mounted on the support plate (202) and forms an air chamber (208) inside. The piston rod (205) is slidably disposed in the air chamber (208). The piston rod (205) is eccentrically connected to the second gear (204), so that the rotational motion of the second gear (204) is converted into the linear reciprocating motion of the piston rod (205) in the air chamber (208); The control circuit board (104) is installed inside the housing module (10) and electrically connected to the brushless motor (201) for controlling the start and stop of the brushless motor (201); The battery (111), installed inside the housing module (10), supplies power to the brushless motor (201) and the control circuit board (104).

2. The compact brushless motor air pump according to claim 1, characterized in that, The reduction ratio between the first gear (203) and the second gear (204) is not less than 1:

10.

3. The compact brushless motor air pump according to claim 1, characterized in that, The outer casing module (10) is provided with heat dissipation holes (110), and the position of the heat dissipation holes (110) is opposite to the position of the brushless motor (201) to form a heat dissipation air duct for the brushless motor (201).

4. The compact brushless motor air pump according to claim 1, characterized in that, The control circuit board (104) integrates a pressure sensing module and / or a current and voltage monitoring module. The control circuit board (104) is configured to control the inflation process according to a preset pressure target value and automatically stop the brushless motor (201) when the target value is reached.

5. The compact brushless motor air pump according to claim 1, characterized in that, The buttons and display screen (109) on the outer casing module (10) are electrically connected to the control circuit board (104).

6. The compact brushless motor air pump according to claim 1, characterized in that, The support plate (202) serves as an integrated mounting base plate. The brushless motor (201), the shaft of the gear transmission mechanism, and the cylinder (206) are all directly or indirectly fixedly mounted on the support plate (202) to ensure the coaxiality between the piston rod (205) and the cylinder (206).

7. The compact brushless motor air pump according to claim 1, characterized in that, The control circuit board (104) integrates a battery management system and a charging interface (105), which is used to charge the battery (111).

8. The compact brushless motor air pump according to claim 1, characterized in that, The outer casing module (10) includes a first outer casing (101) and a second outer casing (102) that are detachably connected. The movement module (20) is mainly installed inside the second outer casing (102). The control circuit board (104) and the battery (111) are installed inside the first outer casing (101) and / or the second outer casing (102).

9. The compact brushless motor air pump according to claim 1, characterized in that, The cylinder (206) is provided with an air hole (207) that communicates with the air chamber (208), and the outer shell module (10) is provided with a connection port (103). The air hole (207) and the connection port (103) are in fluid communication.

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