Brushless air pump

Abstract

The utility model provides a brushless air pump, and belongs to the technical field of air pumps. The brushless air pump has a first direction and a second direction which are intersected. The brushless air pump comprises a support, a driving gear, a driven gear, an eccentric shaft, an air cylinder assembly and a driving motor. The bracket comprises a first supporting part and a second supporting part which are connected with each other; the driving gear and the driven gear are rotationally arranged on the side, facing the first supporting part, of the second supporting part correspondingly, and the driving gear and the driven gear are meshed; the eccentric shaft is arranged on the side, away from the second supporting part, of the driven gear. The cylinder assembly is connected with the first supporting part; one end of the cylinder assembly is connected with one end, deviating from the driven gear, of the eccentric shaft; the driving motor is connected with the support, and an output shaft of the driving motor is coaxially connected with the driving gear. According to the brushless air pump provided by the utility model, the overall length can be reduced, so that the compactness of connection between the gear and the bracket in the brushless air pump is improved, and the space utilization rate of the brushless air pump is improved.

Description

Technical Field

[0001] This application relates to the field of air pumps, and more particularly to a brushless air pump. Background Technology

[0002] By adding a reduction gear set to a conventional brushless bicycle pump, the problem of cold start failure in conventional brushless bicycle pumps can be solved by increasing torque. In typical reduction gear designs, the drive gear is located on the outside of the mechanism, resulting in a large overall length and space occupied by the mechanism. Since the piston movement inside the cylinder is driven by the drive gear, which rotates the driven gear to pull the connecting rod, the force required for the piston's downward movement is greater than that for its upward movement. However, in existing designs, the drive gear is positioned in the upward movement position. Because of the distance between these points, the downward force is reduced, thus affecting the final efficiency. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a brushless air pump.

[0004] This application provides the following technical solution: a brushless air pump having intersecting first and second directions, including:

[0005] The bracket includes a first support portion and a second support portion connected to each other;

[0006] The driving gear and the driven gear are rotatably disposed on the side of the second support portion facing the first support portion along the second direction, and the driving gear and the driven gear mesh.

[0007] An eccentric shaft is disposed on the side of the driven gear away from the second support portion;

[0008] A cylinder assembly is connected to the first support portion along the first direction, and one end of the cylinder assembly is connected to the end of the eccentric shaft opposite to the driven gear.

[0009] A drive motor is connected to the bracket, and the output shaft of the drive motor is coaxially connected to the drive gear.

[0010] In some embodiments, the first support portion has a first mounting port extending through along the first direction, and the inner wall of the first mounting port is connected to the cylinder assembly.

[0011] In some embodiments, the second support portion is provided with a through hole along the second direction;

[0012] One end of the output shaft passes through the through hole and is connected to the drive gear.

[0013] In some embodiments, the cylinder assembly includes a cylinder body, a connecting rod, and piston rings;

[0014] The gas cylinder body is provided with a mounting groove on one side facing the first support part, one end of the connecting rod is connected to one end of the eccentric shaft away from the driven gear, and the other end of the connecting rod is arranged in the mounting groove.

[0015] The piston ring is arranged on one end of the connecting rod away from the first support part, and the outer circumferential side of the piston ring abuts against the groove wall of the mounting groove.

[0016] In some embodiments, one end of the gas cylinder body close to the first support part is accommodated in the first mounting port, and the outer wall of the gas cylinder body is connected to the inner wall of the first mounting port.

[0017] In some embodiments, the second support part is provided with a second mounting port penetrating in the second direction;

[0018] The first bearing having a rotationally connected outer ring and inner ring is arranged between the driven gear and the second support part.

[0019] The outer ring is connected to the inner wall of the second mounting port, the inner ring is arranged on the pin shaft, and one end of the pin shaft away from the first bearing is coaxially connected to the driven gear.

[0020] In some embodiments, the connecting rod comprises a rod body, a limiting part, a connecting ring, and a second bearing.

[0021] The inner wall of the connecting ring is provided with a first annular groove, the second bearing is arranged on the eccentric shaft, the second bearing is accommodated in the first annular groove and connected to the groove wall of the first annular groove.

[0022] The outer circumference of the limiting part is provided with a second annular groove, the piston ring is arranged in the second annular groove, and the piston ring at least partially protrudes from the second annular groove.

[0023] In some embodiments, the limiting part comprises a limiting platform, a connecting platform, and a plurality of lugs.

[0024] The lugs and the limiting platform are respectively arranged on two opposite sides of the connecting platform, and a plurality of the lugs are arranged at intervals on the circumference of the connecting platform, so as to form the second annular groove by the side of the limiting platform facing the lugs, the outer wall of the connecting platform, and the side of the lugs facing the limiting platform.

[0025] In some embodiments, one side of the piston ring in the first direction abuts against the lug, and the other side of the piston ring in the first direction abuts against the limiting platform.

[0026] In some embodiments, the driving gear is arranged between the connecting rod and the second support part, and the connecting rod and the second support part have gaps with the driving gear, respectively.

[0027] Embodiments of the present application have the advantages of reducing the overall length of the brushless air pump, improving the compactness of the connection between the gears and the support in the brushless air pump, and improving the space utilization of the brushless air pump, by arranging the driving gear and the driven gear on the side of the second support part facing the first support part, respectively, and arranging the driving gear and the driven gear in the mounting space formed by the first support part and the second support part.

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 A perspective view of a structure of a brushless air pump is shown, which is provided by some embodiments of the present application;

[0031] Figure 2 Another perspective view of a structure of a brushless air pump is shown, which is provided by some embodiments of the present application;

[0032] Figure 3 A cross-sectional view of the A-A part in Figure 2

[0033] Figure 4 A perspective view of a structure of a support in a brushless air pump is shown, which is provided by some embodiments of the present application;

[0034] Figure 5 A perspective view of a structure of a connecting rod in a brushless air pump is shown, which is provided by some embodiments of the present application.

[0035] Explanation of main element symbols:

[0036] ​100-Bracket; 110-First support part; 120-Second support part; 200-Driving gear; 300-Driven gear; 400-Eccentric shaft; 500-Cylinder assembly; 600-Drive motor; 610-Output shaft; 111-First mounting port; 121-Through hole; 510-Cylinder body; 520-Connecting rod; 530-Piston ring; 511-Mounting groove; 122-Second mounting port; 800-First bearing; 700-Pin; 521-Rod body; 522-Limiting part; 523-Connecting ring; 524-Second bearing; 5231-First annular groove; 5221-Second annular groove; 5222-Limiting platform; 5223-Connecting platform; 5224-Lug.

[0037] X - First direction; Y - Second direction. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0039] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] As shown in Figures 1 to 5 Some embodiments of the present application provide a brushless air pump having a first direction X and a second direction Y intersecting, mainly used to improve the compactness of the brushless air pump structure, improve the space utilization, and improve the transmission efficiency.

[0044] The brushless air pump comprises a support 100, a driving gear 200, a driven gear 300, an eccentric shaft 400, an air cylinder assembly 500, and a driving motor 600.

[0045] The support 100 comprises a first support part 110 and a second support part 120 connected together, and the connection between the first support part 110 and the second support part 120 can be any one of clamping, bolt connection, threaded connection, or integral molding.

[0046] In this embodiment, the first support part 110 and the second support part 120 are integrally formed to form the support 100, so as to improve the overall strength and stability of the support 100.

[0047] The first support part 110 and the second support part 120 can be support plates, support tables, or support frames, which can be specifically set according to actual conditions.

[0048] It should be noted that the first support part 110 and the second support part 120 are connected to form a mounting space through one side of the first support part 110 facing the second support part 120 and one side of the second support part 120 facing the first support part 110.

[0049] The driving gear 200 and the driven gear 300 are respectively rotatably arranged on the side of the second support part 120 facing the first support part 110, that is, the driving gear 200 and the driven gear 300 are arranged in the mounting space, so as to reduce the overall length of the brushless air pump, improve the compactness of the connection between the gears and the support 100 in the brushless air pump, and improve the space utilization of the brushless air pump. In addition, the driving gear 200 and the driven gear 300 are engaged, so that the driven gear 300 can be driven to rotate synchronously during the rotation of the driving gear 200. It can be understood that the axis of the driving gear 200 and the axis of the driven gear 300 are parallel.

[0050] In the embodiment, the eccentric shaft 400 is arranged on the side of the driven gear 300 away from the second support part 120, and the eccentric shaft 400 and the driven gear 300 are connected. It should be noted that the axis of the eccentric shaft 400 is parallel to the axis of the driven gear 300, and the eccentric shaft 400 is arranged at the edge of the driven gear 300.

[0051] In addition, the cylinder assembly 500 is connected with the first support part 110, and the connection between the cylinder assembly 500 and the first support part 110 includes any one or a combination of two or more of clamping, bonding, magnetic connection, threaded connection, and bolt connection, so as to ensure the stability of the connection between the cylinder assembly 500 and the first support part 110, and the stability of the connection between the cylinder assembly 500 and the support 100.

[0052] In the embodiment, one end of the cylinder assembly 500 is connected with one end of the eccentric shaft 400 away from the driven gear 300, so that the driven gear 300 can drive the eccentric shaft 400 to rotate around the axis of the driven gear 300 in the process of rotation, so that the eccentric shaft 400 can drive one end of the cylinder assembly 500 to move synchronously with the eccentric shaft 400 in the process of rotation.

[0053] The driving motor 600 is connected with the support 100, wherein the connection between the driving motor 600 and the support 100 includes any one or a combination of two or more of clamping, bonding, magnetic connection, threaded connection, and bolt connection, so as to ensure the stability of the connection between the driving motor 600 and the support 100. In addition, the output shaft 610 of the driving motor 600 is coaxially connected with the driving gear 200, so that the driving motor 600 can drive the driving gear 200 to rotate synchronously through the output shaft 610 in the process of operation, the driving gear 200 can drive the driven gear 300 to rotate in the process of rotation, and the driven gear 300 can drive the eccentric shaft 400 to move, so that the eccentric shaft 400 can drive one end of the cylinder assembly 500 to move synchronously.

[0054] In the embodiment, the first support part 110 and the second support part 120 are support tables, and the first support part 110 and the second support part 120 are perpendicular to each other.

[0055] It should be noted that, in the embodiment, the driving motor 600 is a brushless motor.

[0056] As Figure 3 and Figure 4As shown in the drawings, in some embodiments of the present application, the first support part 110 is provided with a first mounting opening 111 penetrating along the first direction X, and the inner wall of the first mounting opening 111 is connected with the cylinder assembly 500. It can be understood that a part of the cylinder assembly 500 is accommodated in the first mounting opening 111, that is, the projected cylinder assembly 500 and the first support part 110 in the second direction Y partially overlap, so as to reduce the length of the brushless air pump along the first direction X, which not only can improve the space utilization, but also can reduce the overall size of the brushless air pump.

[0057] As shown in the drawings, Figure 3 and Figure 4 As shown in the drawings, in some embodiments of the present application, the second support part 120 is provided with a through hole 121 penetrating along the second direction Y.

[0058] One end of the output shaft 610 penetrates through the through hole 121 and is coaxially connected with the driving gear 200, so that the driving motor 600 can drive the driving gear 200 to rotate synchronously in the process of operation. By connecting the output shaft 610 and the driving gear 200, the driving gear 200 is fixed and positioned by the output shaft 610, so as to ensure the stability of the driving gear 200.

[0059] It should be noted that the outer wall of the output shaft 610 and the hole wall of the through hole 121 are spaced apart, so as to prevent the output shaft 610 from rubbing against the hole wall of the through hole 121 in the process of rotating relative to the bracket 100, and ensure the fluency and stability of the rotation of the output shaft 610.

[0060] As shown in the drawings, Figure 2 , Figure 3 and Figure 5 As shown in the drawings, in some embodiments of the present application, the cylinder assembly 500 comprises a cylinder body 510, a connecting rod 520 and a piston ring 530.

[0061] The cylinder body 510 is provided with a mounting groove 511 on the side facing the first support part 110, one end of the connecting rod 520 is connected with the end of the eccentric shaft 400 away from the driven gear 300, and the other end of the connecting rod 520 is arranged in the mounting groove 511 and movably connected with the end of the connecting rod 520 away from the first support part 110 and the groove wall of the mounting groove 511, so that the eccentric shaft 400 can drive the connecting rod 520 to move in the mounting groove 511 in the process of rotating along the axis of the driven gear 300.

[0062] In addition, the piston ring 530 is sleeved on one end of the connecting rod 520 away from the first support part 110, and the outer circumferential side of the piston ring 530 abuts against the groove wall of the mounting groove 511, so that the piston ring 530 plays the roles of sealing, heat conduction, oil control, support, vibration reduction, and carbon deposition prevention in the brushless cylinder.

[0063] As shown in Figure 3 In some embodiments of the present application, the cylinder body 510 is accommodated in the first mounting port 111 at one end close to the first support part 110, and the outer wall of the cylinder body 510 is connected with the inner wall of the first mounting port 111, which not only ensures the stability of the connection between the cylinder body 510 and the first support part 110, but also reduces the overall length of the connection between the cylinder body 510 and the support 100, so as to reduce the length of the brushless air pump, improve the space utilization of the brushless air pump, and meet the installation requirements of small spaces.

[0064] As shown in Figure 3 and Figure 4 In some embodiments of the present application, the second support part 120 is provided with a second mounting port 122 and a through hole 121 spaced apart along the second direction Y.

[0065] The first bearing 800 has a rotationally connected outer ring and an inner ring, the outer ring is connected with the inner wall of the second mounting port 122, the inner ring is sleeved on the pin shaft 700 and connected with the pin shaft 700, so that the pin shaft 700 can rotate relative to the second support part 120, and one end of the pin shaft 700 away from the first bearing 800 is coaxially connected with the driven gear 300, so that the pin shaft 700 can rotate synchronously with the driven gear 300, thereby rotationally connecting the driven gear 300 and the second support part 120 to ensure the smoothness of the driven gear 300 during rotation.

[0066] As shown in Figure 3 and Figure 5 In some embodiments of the present application, the connecting rod 520 includes a rod body 521, a limiting part 522, a connecting ring 523, and a second bearing 524.

[0067] The inner wall of the connecting ring 523 is provided with a first annular groove 5231, the axis of the first annular groove 5231 coincides with the axis of the connecting ring 523, the second bearing 524 is sleeved on the eccentric shaft 400, the second bearing 524 is accommodated in the first annular groove 5231, and the second bearing 524 is connected with the groove wall of the first annular groove 5231, so that the second bearing 524 is limited by the groove wall of the first annular groove 5231, and the stability of the connection between the second bearing 524 and the connecting ring 523 is ensured.

[0068] In addition, the outer periphery of the limiting portion 522 is provided with a second annular groove 5221, the piston ring 530 is arranged in the second annular groove 5221, the piston ring 530 is limited and fixed by the second annular groove 5221, the piston ring 530 at least partially protrudes from the second annular groove 5221, and the piston ring 530 protruding from the second annular groove 5221 abuts against the groove wall of the mounting groove 511.

[0069] As shown in the drawings, Figure 5 In some embodiments of the present application, the limiting portion 522 includes a limiting table 5222, a connecting table 5223 and a plurality of lugs 5224, wherein the number of lugs 5224 can be two or any number of two or more, which can be set according to actual conditions.

[0070] In the embodiment, the lug 5224 and the limiting table 5222 are respectively arranged on the two opposite sides of the connecting table 5223 along the first direction X, so as to form the second annular groove 5221 by the side of the limiting table 5222 facing the lug 5224, the outer wall of the connecting table 5223 and the side of the lug 5224 facing the limiting table 5222. It can be understood that one side of the piston ring 530 along the first direction X abuts against the lug 5224, and the other side of the piston ring 530 along the first direction X abuts against the limiting table 5222, that is, the piston ring 530 is limited by the lug 5224 and the limiting table 5222, so as to ensure the stability of the connection between the piston ring 530 and the limiting portion 522.

[0071] It should be noted that the plurality of lugs 5224 are arranged at equal intervals on the side of the connecting table 5223, so as to ensure the limiting quality of the lugs 5224 to the piston ring 530.

[0072] As shown in the drawings, Figure 3As shown, in some embodiments of the present application, the driving gear 200 is arranged between the connecting rod 520 and the second support portion 120, and the connecting rod 520 and the second support portion 120 have gaps with the driving gear 200 respectively, so as to ensure the smoothness and stability of the driving gear 200 during rotation, and prevent the driving gear 200 from rubbing against the connecting rod 520 and the second support portion 120 during rotation.

[0073] It should be noted that by arranging the driving gear 200 between the connecting rod 520 and the second support portion 120, not only the space utilization can be improved, but also the driving efficiency can be further improved and the loss of the brushless air pump can be reduced, since the driving gear 200 is located at the pressing position of the connecting rod 520 along the second direction Y.

[0074] In all the examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus other examples of the example embodiments can have different values.

[0075] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and thus once an item is defined in one drawing, it need not be further defined and explained in the subsequent drawings.

[0076] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A brushless air pump having a first direction and a second direction intersecting, characterized by, The utility model relates to a kind of air cylinder, including: Support, including the first support part and the second support part connected; Driving gear and driven gear, along the second direction, respectively rotating the second support part side towards the first support part, the driving gear and the driven gear are engaged; Eccentric shaft, disposed in the driven gear side away from the second support part; Cylinder assembly, along the first direction, with the first support part is connected, one end of the cylinder assembly is connected with the eccentric shaft end away from the driven gear; Driving motor, connected with the support, the output shaft of the driving motor is coaxially connected with the driving gear.

2. The brushless air pump according to claim 1, wherein The first support part is provided with first mounting port along the first direction, and the inner wall of the first mounting port is connected with the cylinder assembly.

3. The brushless air pump according to claim 1, wherein The second support part is provided with through hole along the second direction; One end of the output shaft passes through the through hole and is connected with the driving gear.

4. The brushless air pump according to claim 2, wherein The cylinder assembly includes cylinder body, connecting rod and piston ring; The side of the cylinder body towards the first support part is provided with mounting groove, one end of the connecting rod is connected with the eccentric shaft end away from the driven gear, and the other end of the connecting rod is arranged in the mounting groove; The piston ring is sleeved on the end of the connecting rod away from the first support part, and the outer circumferential side of the piston ring is in abutment with the groove wall of the mounting groove.

5. The brushless air pump according to claim 4, wherein The end of the cylinder body close to the first support part is accommodated in the first mounting port, and the outer wall of the cylinder body is connected with the inner wall of the first mounting port.

6. The brushless air pump according to any one of claims 1 to 5, characterized in that, The second support part is provided with second mounting port along the second direction; The first bearing and pin shaft are arranged between the driven gear and the second support part, and the first bearing has rotatingly connected outer ring and inner ring. The outer ring is connected with the inner wall of the second mounting port, the inner ring is sleeved on the pin shaft, and one end of the pin shaft away from the first bearing is coaxially connected with the driven gear.

7. The brushless air pump according to claim 4, wherein The connecting rod includes rod body, limiting part, connecting ring and second bearing; The inner wall of the connecting ring is provided with first annular groove, the second bearing is sleeved on the eccentric shaft, and the second bearing is accommodated in the first annular groove and connected with the groove wall of the first annular groove. The outer periphery of the limiting part is provided with second annular groove, the piston ring is arranged in the second annular groove, and the piston ring at least partially protrudes from the second annular groove.

8. The brushless air pump according to claim 7, wherein The limiting part includes limiting table, connecting table and multiple lugs; The lugs and the limiting table are respectively arranged on the two opposite sides of the connecting table, and multiple lugs are arranged on the circumference of the connecting table at intervals, so as to form the second annular groove by the side of the limiting table towards the lug, the outer wall of the connecting table and the side of the lug towards the limiting table.

9. The brushless air pump according to claim 8, wherein, The side of the piston ring along the first direction is in abutment with the lug, and the other side of the piston ring along the first direction is in abutment with the limiting table.

10. The brushless air pump according to claim 7, wherein The driving gear is arranged between the connecting rod and the second support part, and the connecting rod and the second support part have gaps with the driving gear respectively.

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