Piston drive mechanism and air pump equipment

Abstract

This application provides a piston drive mechanism and an air pump device. The piston drive mechanism includes a piston cylinder, a piston, a cylinder bracket, and a drive motor. The piston cylinder is an aluminum alloy piston cylinder. The piston is movably disposed within the piston cylinder. The cylinder bracket is disposed within the piston cylinder and is also an aluminum alloy cylinder bracket. The drive motor includes a motor housing and an output shaft. The motor housing is disposed within the cylinder bracket, and the output shaft is disposed within the motor housing. The output shaft is drively connected to the piston to drive the piston's movement. Thus, compared to piston drive mechanisms in related technologies, the piston drive mechanism of this application uses aluminum alloy for both the cylinder bracket and the piston cylinder. Due to the low density of aluminum alloy, the overall weight of the air pump device is significantly reduced, while ensuring sufficient structural strength and durability, thereby improving the ease of operation and portability of the air pump device.

Description

Technical Field

[0001] This application relates to the field of air pump technology, and in particular to a piston drive mechanism and air pump equipment. Background Technology

[0002] Air pumps are commonly used to inflate bicycle tires or other inflatable objects such as electric bicycles. Air pumps typically use a piston-driven mechanism to compress and deliver gas. The motor housing of the piston-driven mechanism needs to be assembled with the cylinder bracket first, and then the cylinder bracket is assembled with the piston cylinder.

[0003] However, both the cylinder bracket and the piston cylinder are made of zinc alloy, which makes the overall weight of the cylinder bracket and piston cylinder relatively large, resulting in a large overall weight of the air pump equipment, making it inconvenient for users to use and carry. Utility Model Content

[0004] This application provides a piston drive mechanism and an air pump device, which can improve the assembly efficiency of the piston drive mechanism.

[0005] In a first aspect, embodiments of this application provide a piston drive mechanism, which includes a piston cylinder, a piston, a cylinder bracket, and a drive motor. The piston cylinder is an aluminum alloy piston cylinder. The piston is movably disposed within the piston cylinder. The cylinder bracket is disposed within the piston cylinder and is also an aluminum alloy cylinder bracket. The drive motor includes a motor housing and an output shaft. The motor housing is disposed within the cylinder bracket, and the output shaft is disposed within the motor housing. The output shaft is drively connected to the piston to drive the piston to move.

[0006] In some embodiments, the cylinder bracket is integrally formed with the piston cylinder.

[0007] In some embodiments, the cylinder support includes:

[0008] A first connecting part is connected to the piston cylinder;

[0009] A second connecting portion, the second connecting portion being connected to the first connecting portion, and the motor housing being disposed on the second connecting portion; and

[0010] The first reinforcing part is connected to the connection between the first connecting part and the piston cylinder.

[0011] In some embodiments, there are multiple first reinforcing parts, and the multiple first reinforcing parts are arranged sequentially along the edge of the air inlet of the piston cylinder.

[0012] In some embodiments, the second connecting portion is provided with a first heat dissipation through hole, which extends through both opposite sides of the second connecting portion.

[0013] In some embodiments, the cylinder bracket is further provided with a second reinforcing part, which is connected to the second connecting part and extends around the edge of the first heat dissipation through hole.

[0014] Secondly, this application provides an air pump device, which includes a housing and a piston drive mechanism according to any of the above embodiments. The housing is provided with a receiving cavity; the piston drive mechanism is disposed in the receiving cavity.

[0015] In some embodiments, the air pump device further includes:

[0016] A battery is disposed within the receiving cavity, and the battery and the piston drive mechanism are arranged along the length of the housing.

[0017] In some embodiments, the housing further includes a housing body, a first end cap, and a second end cap, the housing body, the first end cap, and the second end cap cooperating to form the receiving cavity; the first end cap and the second end cap are respectively disposed at both ends of the housing body along the width direction of the housing.

[0018] In some embodiments, the air pump device further includes a circuit board electrically connected to the battery and the drive motor, the circuit board being stacked with the first end cover;

[0019] The circuit board is disposed between the piston drive mechanism and the first end cap; and / or, the circuit board is disposed between the battery and the first end cap.

[0020] The piston drive mechanism and air pump device provided in this application embodiment include a piston cylinder, a piston, a cylinder bracket, and a drive motor. The piston cylinder is an aluminum alloy piston cylinder. The piston is movably disposed within the piston cylinder. The cylinder bracket is disposed within the piston cylinder and is also an aluminum alloy cylinder bracket. The drive motor includes a motor housing and an output shaft. The motor housing is disposed within the cylinder bracket, and the output shaft is disposed within the motor housing. The output shaft is drively connected to the piston to drive its movement. Thus, compared to piston drive mechanisms in related technologies, the cylinder bracket and piston cylinder of the piston drive mechanism in this application are both made of aluminum alloy. Due to the low density of aluminum alloy, the overall weight of the air pump device is significantly reduced, while ensuring sufficient structural strength and durability, thereby improving the ease of operation and portability of the air pump device. In addition, both the cylinder bracket and piston cylinder are made of aluminum alloy, which gives them excellent corrosion resistance, extends the service life of the air pump, and ensures stable performance in various environments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 This is a schematic diagram of the piston drive mechanism provided in an embodiment of this application;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the cylinder support and piston cylinder;

[0024] Figure 3 This is a schematic diagram of the structure of the air pump device provided in the embodiments of this application;

[0025] Figure 4 for Figure 3 A schematic diagram of the exploded structure of a medium-pressure air pump.

[0026] Figure 5 for Figure 3 A cross-sectional schematic diagram of a medium-pressure air pump.

[0027] Explanation of icon numbers:

[0028] 10. Piston drive mechanism; 20. Air pump equipment; 100. Piston cylinder; 200. Piston; 300. Cylinder bracket; 310. First connecting part; 311. Second heat dissipation hole; 320. Second connecting part; 321. First heat dissipation hole; 330. First reinforcing part; 340. Second reinforcing part; 400. Drive motor; 410. Motor housing; 500. Housing; 510. Housing body; 520. First end cap; 530. Second end cap; 600. Battery; 700. Circuit board. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0031] In related technologies, air pumps are commonly used to inflate bicycle tires or electric bicycle tires. Air pumps typically use a piston-driven mechanism to compress and deliver gas. The motor housing of the piston-driven mechanism needs to be assembled with the cylinder bracket first, and then the cylinder bracket is assembled with the piston cylinder. However, the inventors discovered that both the cylinder bracket and the piston cylinder are made of zinc alloy, resulting in a large overall weight and making the air pump device bulky and inconvenient for users to use and carry.

[0032] In view of this, please refer to Figure 1 and Figure 5This application provides a piston drive mechanism 10, which may include a piston cylinder 100, a piston 200, a cylinder bracket 300, and a drive motor 400. The piston cylinder 100 is an aluminum alloy piston cylinder, and the piston 200 is movably disposed within the piston cylinder 100. The cylinder bracket 300 is disposed within the piston cylinder 100 and is also an aluminum alloy cylinder bracket. The drive motor 400 includes a motor housing 410 and an output shaft. The motor housing 410 is disposed within the cylinder bracket 300, and the output shaft is disposed within the motor housing 410 and is drively connected to the piston 200 to drive the piston 200 to move.

[0033] Thus, compared to piston drive mechanisms in related technologies, the cylinder support 300 and piston cylinder 100 of the piston drive mechanism 10 in this application are both made of aluminum alloy. Due to the low density of aluminum alloy, the overall weight of the air pump device 20 is significantly reduced, while ensuring sufficient structural strength and durability, thereby improving the ease of operation and portability of the air pump device 20. Furthermore, the aluminum alloy construction of both the cylinder support 300 and piston cylinder 100 provides excellent corrosion resistance, extending the service life of the air pump device 20 and maintaining stable performance in various environments.

[0034] Understandably, with the volume remaining the same, the overall weight of the piston cylinder 100 and cylinder support 300 can be reduced because aluminum alloy has a lower density than zinc alloy.

[0035] The piston 200, movably positioned within the piston cylinder 100, reciprocates under the influence of an external driving force. When the drive motor 400 is directly connected to the piston 200 via its output shaft and drives it to move in one direction, the internal volume of the piston cylinder 100 increases, and the pressure decreases, thereby introducing external air through the intake valve. During this process, the airflow enters the piston cylinder 100 along a predetermined path. Subsequently, when the drive motor 400 drives the piston 200 to move in the opposite direction, the internal space of the piston cylinder 100 decreases, causing the gas to be compressed. As the pressure increases, the exhaust valve opens, and the compressed gas is delivered to the object to be inflated through the pipeline system.

[0036] In some embodiments, the cylinder bracket 300 and the piston cylinder 100 are integrally formed. For example, the cylinder bracket 300 and the piston cylinder 100 can be manufactured by injection molding or die casting. In this way, the cylinder bracket 300 and the piston cylinder 100 of the piston drive mechanism 10 are integrally formed, so that the motor housing 410 of the drive motor 400 can be directly assembled to the cylinder bracket 300 (e.g., screw connection or snap-fit ​​connection) to complete the fixation of the drive motor 400, saving the assembly process of the cylinder bracket 300 and the piston cylinder 100, thereby helping to improve the assembly efficiency of the piston drive mechanism 10.

[0037] Furthermore, the integrated design of the cylinder bracket 300 and the piston cylinder 100 helps to reduce the number of parts in the piston drive mechanism 10, thereby reducing the risk of positioning errors and improving the assembly efficiency and mechanical stability of the piston drive mechanism 10.

[0038] Please see Figure 1 and Figure 2 In some embodiments, the cylinder support 300 includes a first connecting portion 310, a second connecting portion 320, and a first reinforcing portion 330. The first connecting portion 310 is connected to the piston cylinder 100. The second connecting portion 320 is connected to the first connecting portion 310, and the motor housing 410 is disposed on the second connecting portion 320. The first reinforcing portion 330 is connected at the connection between the first connecting portion 310 and the piston cylinder 100. Thus, the first reinforcing portion 330 is disposed at the connection between the first connecting portion 310 and the piston cylinder 100, which enhances the connection strength and effectively prevents loosening of the connection or structural deformation caused by mechanical vibration or external impact. The first connecting portion 310, the second connecting portion 320, the first reinforcing portion 330, and the piston cylinder 100 form an integrated support system, which not only improves the load-bearing capacity and deformation resistance of the cylinder support 300, but also enhances the stability and reliability of the entire piston drive mechanism 10 during operation.

[0039] The number of first reinforcing parts 330 is set to multiple, and the multiple first reinforcing parts 330 are arranged sequentially along the edge of the air inlet on the piston cylinder 100. This arrangement makes the connection area between the cylinder support 300 and the piston cylinder 100 uniformly enhanced in terms of structural strength, especially focusing on strengthening the area around the air inlet where the stress is concentrated, thereby effectively improving the load-bearing capacity and structural stability of the overall connection part.

[0040] By distributing multiple first reinforcing parts 330 along the edge of the air inlet, not only is the pressure resistance and fatigue resistance of the area improved, but the vibration stress caused by the reciprocating motion of the piston 200 can also be effectively dispersed, preventing structural deformation, cracking and other adverse phenomena caused by local stress concentration.

[0041] Furthermore, the aforementioned reinforced structure design enhances the assembly precision and reliability between the cylinder support 300 and the piston cylinder 100, reduces the risk of breakage due to vibration or pressure changes during operation, and thus extends the service life of the entire piston drive mechanism 10.

[0042] In some embodiments, the second connecting portion 320 is provided with a first heat dissipation through hole 321, which extends through the two opposite sides of the second connecting portion 320, allowing air to circulate between the two sides of the second connecting portion 320, thereby effectively improving the heat dissipation capacity of a local area of ​​the cylinder bracket 300.

[0043] In this embodiment, the drive motor 400 is fixedly mounted on the second connection portion 320 and releases a certain amount of heat to the surrounding structure during continuous operation. To avoid excessive heat accumulation in a localized area, which could affect the working stability of the motor or cause a deterioration in the material properties of the cylinder bracket 300, this application provides a first heat dissipation hole 321 in the second connection portion 320 to form an effective heat dissipation channel, enhance air convection, thereby accelerating the heat dissipation rate and maintaining the drive motor 400 and surrounding components within a suitable temperature range.

[0044] Furthermore, the first heat dissipation through-hole 321 not only helps improve thermal management performance but also reduces the weight of the second connection part 320 to a certain extent, achieving a lightweight structural design without affecting its load-bearing capacity and assembly strength. The position, number, and size of the first heat dissipation through-hole 321 can be optimized according to the actual heat distribution to achieve the best balance between heat dissipation effect and structural performance.

[0045] In some embodiments, the cylinder bracket 300 is further provided with a second reinforcing part 340, which is disposed on the second connecting part 320 and extends around the edge of the first heat dissipation through hole 321. This helps to enhance the local structural strength of the second connecting part 320 after the heat dissipation through hole is opened, and ensures that the second connecting part 320 still has good mechanical properties when subjected to the installation load and operating vibration of the drive motor 400.

[0046] Specifically, the second reinforcing part 340 is integrally formed with the second connecting part 320 and arranged along the circumferential edge of the first heat dissipation through hole 321, forming a reinforced support for the area surrounding the heat dissipation through hole. The second reinforcing part 340 can compensate for the structural weakening caused by the opening of the through hole without adding extra assembly steps, preventing structural failures such as deformation and cracking caused by stress concentration or external forces during use. Furthermore, the second reinforcing part 340 also helps to improve the overall rigidity and fatigue resistance of the cylinder support 300, thereby extending the service life of the piston drive mechanism 10. Moreover, the second reinforcing part 340 can also guide airflow; its structure surrounding the heat dissipation through hole helps optimize the airflow path, enhances convective heat transfer, and further improves heat dissipation efficiency.

[0047] In some embodiments, the first connecting portion 310 is provided with a second heat dissipation through hole 311, which extends through the two opposite sides of the first connecting portion 310, allowing air to circulate between the two sides of the first connecting portion 310. This structural design aims to improve the heat dissipation capacity of the cylinder bracket 300 in the area where it connects with the piston cylinder 100.

[0048] In practical applications, the first connecting part 310 serves as a crucial connection between the cylinder support 300 and the piston cylinder 100. During operation, it may be affected by heat from the drive motor 400 and the heat generated by the piston 200 compressing gas. To prevent heat accumulation in this area from affecting structural strength or sealing performance, this application provides a second heat dissipation hole 311 in the first connecting part 310, forming an effective ventilation path, enhancing air convection, thereby improving heat dissipation efficiency and maintaining temperature stability in the connection area.

[0049] Furthermore, the second heat dissipation through-hole 311 not only helps improve thermal management performance, but can also work in conjunction with other heat dissipation structures as needed to achieve systematic thermal control optimization of the entire piston drive mechanism 10. At the same time, the design of this through-hole takes into account both structural strength and lightweight requirements. Under the premise of ensuring that the load-bearing capacity and assembly stability of the first connecting part 310 are not affected, the position, number and size of the through-hole are reasonably arranged to achieve the best balance between heat dissipation effect and structural performance.

[0050] Please see Figures 3 to 5 This application embodiment also provides an air pump device 20, which includes a housing 500 and a piston drive mechanism 10. The housing 500 is provided with a receiving cavity, and the piston drive mechanism 10 is disposed in the receiving cavity, thereby realizing a compact and reasonable overall design.

[0051] In a specific embodiment, the housing 500 is made of a material with sufficient strength and rigidity to ensure good protection for the internal piston drive mechanism 10 and other related components. Simultaneously, functional openings such as vents, air inlets, and air outlets are provided at corresponding positions on the housing 500 to facilitate gas flow and external connection. The vent design helps improve the overall heat dissipation performance, preventing overheating caused by motor operation or changes in ambient temperature, thereby enhancing the operational stability and safety of the air pump device 20. Furthermore, the air pump device 20 can also be equipped with a fan within the housing 500 to drive airflow through the first heat dissipation hole 321 and / or the second heat dissipation hole 311.

[0052] The air pump device 20 also includes a battery 600, which is disposed within a receiving cavity. The battery 600 and the piston drive mechanism 10 are arranged along the length of the housing 500. Specifically, the battery 600 serves as the power source for the air pump device 20, is installed inside the receiving cavity and electrically connected to the piston drive mechanism 10, and provides it with the electrical energy required for operation. Arranging the battery 600 and the piston drive mechanism 10 sequentially along the length of the housing 500 not only avoids the increased volume caused by vertical stacking, but also makes the overall center of gravity distribution more balanced, improving the stability and portability of the device during use.

[0053] Furthermore, based on this layout, heat dissipation holes or thermal conductive structures can be provided at corresponding positions on the housing 500 to enhance the thermal management performance of the battery 600 and the piston drive mechanism 10 during their respective operations, preventing mutual heat interference and resulting in localized overheating. Simultaneously, an isolation and protective structure can be provided between the battery 600 and the piston drive mechanism 10 to improve electrical safety and prevent short circuits or other abnormalities caused by vibration or external impacts.

[0054] In some embodiments, the housing 500 further includes a housing body 510, a first end cap 520 and a second end cap 530, which cooperate to form a receiving cavity. Along the width direction of the housing 500, the first end cap 520 and the second end cap 530 are respectively disposed at both ends of the housing body 510, forming an overall closed or semi-closed spatial structure to achieve effective protection of the piston drive mechanism 10 and other key components.

[0055] In a specific embodiment, the shell body 510 serves as the main structure, and its cross-sectional shape can be designed as rectangular, circular, or polygonal, etc., according to actual needs. Internally, it is equipped with positioning structures and fixing positions for mounting components such as the piston drive mechanism 10 and the battery 600. The first end cap 520 and the second end cap 530 are detachably or fixedly connected to both ends of the shell body 510 via fasteners, snap-fit ​​structures, or integral molding processes, ensuring the sealing of the accommodating cavity and structural stability. This split-type shell 500 structure not only facilitates the assembly and maintenance of internal components but also allows for flexible adjustment of the configuration of each part according to different usage scenarios.

[0056] Furthermore, in the design of the housing 500, functional components such as air vents, power interfaces, and control buttons can be provided on the first end cover 520 or the second end cover 530 as needed to improve the ease of operation and human-machine interaction of the equipment. Meanwhile, sealing elements, such as rubber gaskets or sealing strips, are provided at the connection between the end cover and the housing body 510 to enhance the overall dustproof and waterproof performance and meet the needs of use in different environments.

[0057] In some embodiments, the air pump device 20 also includes a circuit board 700, which is used to realize the electrical connection between the battery 600 and the drive motor 400, and to control the operating status of the piston drive mechanism 10. The circuit board 700 may integrate electronic components such as a power management module, a motor drive module, a pressure detection module, and an overload protection module, and can realize intelligent control of functions such as starting, stopping, regulating inflation pressure, and responding to abnormal situations of the air pump device 20.

[0058] In terms of structural layout, the circuit board 700 and the first end cover 520 are stacked. Specifically, the circuit board 700 is located between the piston drive mechanism 10 and the first end cover 520; or, the circuit board 700 is located between the battery 600 and the first end cover 520. In some preferred embodiments, multiple circuit boards 700 can also be arranged in the above two positions according to functional requirements to realize the modular design and functional partitioning of the control system.

[0059] When the circuit board 700 is positioned between the piston drive mechanism 10 and the first end cover 520, it can shorten the electrical connection distance between the circuit board 700 and the drive motor 400, reduce the length of the wires, improve signal transmission efficiency and system response speed, and also facilitate the rational use of the internal space of the entire machine. When the circuit board 700 is positioned between the battery 600 and the first end cover 520, it is easier to monitor and manage the working status of the battery 600 in real time, such as voltage detection and charge / discharge control, thereby improving the electrical safety and stability of the system.

[0060] To further enhance the installation reliability of the circuit board 700 within the housing 500, an insulating fixing bracket can be installed around it, or an embedded positioning groove can be used for secure installation. Additionally, a buffer pad can be placed between the circuit board 700 and the first end cover 520 to prevent damage to the circuit board 700 or failure of electrical connections due to external vibration or impact. The first end cover 520 has corresponding through holes or reserved slots for leading out control lines, charging interfaces, or indicator light assemblies to support the connection of external operating interfaces or charging devices, thereby improving the human-machine interaction experience.

[0061] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0062] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof.

[0063] The above are merely specific embodiments of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A piston drive mechanism characterized by, include: Piston cylinder, wherein the piston cylinder is an aluminum alloy piston cylinder; A piston, which is movably disposed within the piston cylinder; A cylinder bracket, which is mounted on the piston cylinder, is an aluminum alloy cylinder bracket; as well as A drive motor, comprising a motor housing and an output shaft, wherein the motor housing is disposed on the cylinder bracket, the output shaft is disposed on the motor housing, and the output shaft is drively connected to the piston to drive the piston to move.

2. The piston drive mechanism of claim 1, wherein, The cylinder bracket is integrally formed with the piston cylinder.

3. The piston drive mechanism of claim 1, wherein, The cylinder support includes: A first connecting part is connected to the piston cylinder; A second connecting portion, the second connecting portion being connected to the first connecting portion, and the motor housing being disposed on the second connecting portion; and The first reinforcing part is connected to the connection between the first connecting part and the piston cylinder.

4. The piston drive mechanism of claim 3, wherein, The number of the first reinforcing parts is multiple, and the multiple first reinforcing parts are arranged sequentially along the edge of the air inlet of the piston cylinder.

5. The piston drive mechanism of claim 3, wherein, The second connecting part is provided with a first heat dissipation through hole, which extends through both opposite sides of the second connecting part.

6. The piston drive mechanism of claim 5, wherein, The cylinder bracket is further provided with a second reinforcing part, which is connected to the second connecting part and extends around the edge of the first heat dissipation through hole.

7. A gas pump device, characterized by include: A housing, the housing having a receiving cavity; and The piston drive mechanism according to any one of claims 1 to 6 is disposed within the receiving cavity.

8. The air pump device of claim 7, wherein, The air pump equipment also includes: A battery is disposed within the receiving cavity, and the battery and the piston drive mechanism are arranged along the length of the housing.

9. The air pump device of claim 8, wherein, The housing further includes a housing body, a first end cap, and a second end cap, which together form the receiving cavity; along the width direction of the housing, the first end cap and the second end cap are respectively disposed at both ends of the housing body.

10. The air pump device of claim 9, wherein, The air pump device also includes a circuit board, which is electrically connected to the battery and the drive motor, and the circuit board is stacked with the first end cover. The circuit board is disposed between the piston drive mechanism and the first end cap; and / or, the circuit board is disposed between the battery and the first end cap.

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