Expandable brushless mini air pump and air pump assembly

Abstract

The utility model relates to the field of air pumps, solves the problems that after a shell of an air pump is detachably connected in a two-section mode, the integration level of all parts is affected by a connecting structure, and a part of the advantage of small size is sacrificed, and provides an expandable brushless mini air pump which comprises an air inlet bottom shell, an air outlet barrel, a brushless motor and a fan body. The air inlet bottom shell is provided with a first containing cavity and a first sleeving section. The air outlet cylinder is provided with a second sleeving section, the first sleeving section is sleeved with the second sleeving section, the second sleeving section is detachably connected with the first sleeving section, the air outlet cylinder is provided with a second containing cavity, and the first containing cavity is communicated with the second containing cavity; the brushless motor is arranged in the first accommodating cavity; the fan body is connected with an output shaft of the brushless motor, and at least one part of the fan body is contained in the second containing cavity. The shell of the air pump is designed to be the detachable air inlet bottom shell and the detachable air outlet barrel, and the fan body or the brushless motor can be overhauled or replaced and the like through disassembly and assembly of the air inlet bottom shell and the detachable air outlet barrel.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind pump, specifically, relate to a kind of expandable brushless mini wind pump and wind pump assembly. BACKGROUND

[0002] The wind pump structure under prior art mostly adopts direct current motor driving, but is limited to the size of direct current motor, leading to the size of its wind pump mechanism is too large, and direct current motor wind pump mostly is integrated with compression pump, is used in cooperation, and the use flexibility is lower.Brushless motor driving benefits from its small size can be split with compression pump and used, can be used alone, also can be combined with compression pump using accessory and then expand use scene and small in size, more convenient to carry.But when the wind pump shell adopts two-section type connection, the existence of connecting structure can affect the integration of each component, sacrifice a part of small size advantage. SUMMARY

[0003] The utility model aims at providing a kind of expandable brushless mini wind pump, solve the problem that the shell of wind pump adopts two-section type detachable connection, the existence of connecting structure can affect the integration of each component, sacrifice a part of small size advantage.

[0004] The embodiment of the utility model realizes by the following technical scheme:

[0005] A kind of expandable brushless mini wind pump, including: air inlet bottom shell, air outlet cylinder, brushless motor and fan body, the air inlet bottom shell is equipped with first accommodating cavity, the air inlet bottom shell is equipped with first sleeve segment;The air outlet cylinder is equipped with second sleeve segment, the second sleeve segment is sleeved on the first sleeve segment and is detachably connected with the first sleeve segment, the air outlet cylinder is equipped with second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity;The brushless motor is located in the first accommodating cavity;The fan body is connected with the output shaft of the brushless motor, at least a part of the fan body is contained in the second accommodating cavity.

[0006] Preferably, the diameter of the circumferential surface of the fan body is greater than the maximum distance from the outer wall of the brushless motor to the output shaft axis.

[0007] Preferably, the fan body is completely contained in the second accommodating cavity, and the second accommodating cavity includes: first cavity, the first cavity is communicated with the first accommodating cavity, and the vertical distance between the side wall of the first cavity and the outer wall of the brushless motor is greater than the vertical distance between the side wall of the first accommodating cavity and the outer wall of the brushless motor.

[0008] Preferably, the fan body comprises: an integrated disc connected with an output shaft of the brushless motor; and fan blades connected with the integrated disc, wherein the fan blades are arc-shaped, and the distance between the end of the fan blade close to the center of the integrated disc and the air inlet bottom shell is greater than the distance between the end of the fan blade close to the edge of the integrated disc and the air inlet bottom shell.

[0009] Preferably, the second accommodating cavity further comprises: a second cavity in communication with the side of the first cavity away from the first accommodating cavity, and the cavity diameter of the second cavity gradually decreases during the extension away from the first cavity.

[0010] Preferably, the gap between adjacent fan blades gradually decreases during the extension towards the center of the integrated disc; the fan blades comprise long blades and short blades, and at least one short blade is arranged between adjacent long blades.

[0011] Preferably, the air outlet cylinder is further provided with an air outlet cavity in communication with the end of the second accommodating cavity away from the first accommodating cavity, and the cavity diameter of the air outlet cavity is smaller than the diameter of the integrated disc.

[0012] Preferably, the outer wall of the air inlet bottom shell is provided with external threads, and the inner wall of the second accommodating cavity is provided with internal threads matched with the external threads.

[0013] Preferably, the air inlet end of the air inlet bottom shell is provided with a mounting plate provided with mounting holes matched with the brushless motor, and the mounting plate is further provided with air holes, and a flow channel is left between the brushless motor and the side wall of the first accommodating cavity, and the air holes are in communication with the flow channel.

[0014] The utility model discloses a kind of wind pump assemblies, comprising: the expandable brushless mini wind pump and adapter, the end of the air outlet cylinder away from the air inlet bottom shell is provided with first thread;The adapter is provided with second thread matched with the first thread, and the side wall of the adapter is provided with connecting cylinder, and the connecting cylinder is used to be connected with compressed pump, and the end of the adapter away from the air outlet cylinder is used to be connected with air nozzle.

[0015] The utility model at least has following beneficial effects:

[0016] The shell of the wind pump is designed as detachable air inlet bottom shell and air outlet cylinder, so that the maintenance or replacement of fan body or brushless motor can be realized simply by disassembling and assembling the air inlet bottom shell and the air outlet cylinder;The second sleeve section is sleeved on the first sleeve section, so that the space waste in the first accommodating cavity is reduced, and the volume of the wind pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows. 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. Other related drawings can also be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0018] Figure 1 Appearance view of the expandable brushless mini air pump;

[0019] Figure 2 Exploded view of the expandable brushless mini air pump;

[0020] Figure 3 Sectional view of the expandable brushless mini air pump;

[0021] Figure 4 Comparison view of the connection relationship between the air inlet bottom shell and the air outlet cylinder;

[0022] Figure 5 Appearance view of the air pump assembly;

[0023] Figure 6 Structure schematic view of the air pump assembly;

[0024] Icon: 1-air inlet bottom shell, 11-first accommodating cavity, 111-flow channel, 12-first sleeve joint section, 13-mounting plate, 131-mounting hole, 132-air hole, 2-air outlet cylinder, 21-second sleeve joint section, 22-second accommodating cavity, 221-first cavity, 222-second cavity, 23-air outlet cavity, 24-first thread, 3-brushless motor, 4-fan body, 41-integrated disc, 42-fan blade, 421-long blade body, 422-short blade body, 5-adaptor, 51-second thread, 52-connection cylinder, 6-compression pump. DETAILED DESCRIPTION

[0025] In order to make the purpose, method scheme and advantages of the embodiments of the present application more clear, the method scheme in the embodiments of the present application is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0026] Embodiment 1: as Figures 1-4As shown, the expandable brushless mini air pump comprises an air inlet bottom shell 1, an air outlet cylinder 2, a brushless motor 3 and a fan body 4. The air inlet bottom shell 1 is provided with a first accommodating cavity 11, and the air inlet bottom shell 1 is provided with a first sleeve joint segment 12. The air outlet cylinder 2 is provided with a second sleeve joint segment 21, the second sleeve joint segment 21 is sleeved on the first sleeve joint segment 12 and detachably connected with the first sleeve joint segment 12, and the air outlet cylinder 2 is provided with a second accommodating cavity 22, the first accommodating cavity 11 and the second accommodating cavity 22 are communicated. The brushless motor 3 is arranged in the first accommodating cavity 11. The fan body 4 is connected with the output shaft of the brushless motor 3, and at least a part of the fan body 4 is accommodated in the second accommodating cavity 22.

[0027] In the implementation process, the shell is provided as a segmented air inlet bottom shell 1 and an air outlet cylinder 2. When the fan body 4 or the brushless motor 3 in the air pump needs to be repaired or replaced, the fan body 4 or the brushless motor 3 can be exposed by separating the air inlet bottom shell 1 and the air outlet cylinder 2. The air inlet bottom shell 1 or the air outlet cylinder 2 can be in the form of a whole cylinder, and the outer diameters of the air inlet bottom shell 1 and the air outlet cylinder 2 can be the same. When the two are connected, as shown in Figure 1 , the connection part is as smooth as possible. In order to make the outer diameter of the air inlet bottom shell 1 as small as possible, thereby increasing the portability of the air pump, as shown in Figure 3 , the second sleeve joint segment 21 is sleeved on the first sleeve joint segment 12. If, as shown in Figure 4 , the first sleeve joint segment 12 is sleeved on the second sleeve joint segment 21, the second sleeve joint segment 21 will occupy a part of the first accommodating cavity 11, and the reserved space between the brushless motor 3 and the cavity wall in the first accommodating cavity 11 will increase, thereby causing the volume of the air inlet bottom shell 1 to become larger. In addition, since the volume of the brushless motor 3 is relatively small, the diameter of the fan body 4 is often larger than that of the brushless motor 3, and thus the diameter of the second accommodating cavity 22 needs to be larger than that of the brushless motor 3. If the second sleeve joint segment 21 is located in the first accommodating cavity 11, the distance between the second sleeve joint segment 21 cavity wall and the brushless motor 3 will further increase the reserved space of the first accommodating cavity 11, and the volume of the air pump will be relatively large. After adopting the connection structure provided in the embodiment, since the second sleeve joint segment 21 is sleeved on the first sleeve joint segment 12, the inner diameter of the second sleeve joint segment 21 is larger than that of the first sleeve joint segment 12, and the second sleeve joint segment 21 will not affect the size of the first accommodating cavity 11.

[0028] The gap between the brushless motor 3 and the side wall of the first accommodating cavity 11 is an air inlet channel. When the second sleeve joint segment 21 is sleeved on the first sleeve joint segment 12, the problem that the second sleeve joint segment 21 blocks the gas flow can be avoided, as shown in Figure 4 .

[0029] In this embodiment, the fan pump is no longer directly integrated with the compression pump 6. It can be connected to the compression pump 6 at the end of the air outlet cylinder 2 away from the air inlet bottom shell 1 by using a fitting, or it can be directly connected to an air nozzle. It is not only suitable for low air pressure scenes, but also suitable for high air pressure scenes, and the use scene is widened.

[0030] In the working process, after starting the brushless motor 3, the fan body 4 rotates, and the airflow enters the first containing cavity 11 and the second containing cavity 22 from the tail of the air inlet bottom shell 1 in turn, and finally flows out from the air outlet cylinder 2.

[0031] Embodiment 2: In order to increase the use of air pressure, improvements are made on the basis of embodiment 1, as shown in Figure 3 In this embodiment, the diameter of the rotating circumferential surface of the fan body 4 is greater than the maximum distance from the outer wall of the brushless motor 3 to the output shaft axis.

[0032] In the specific implementation process, the rotating circumferential surface of the fan body 4 refers to the circular surface enclosed by the movement path of the point on the fan body 4 farthest from the output shaft axis of the brushless motor 3 when the fan body 4 rotates. The outer wall of the brushless motor 3 refers to the outer wall of the main body part excluding the output shaft. Since the volume of the brushless motor 3 is small, in order to enable the fan pump to support a relatively large air pressure, this embodiment adopts a larger fan body 4. In cooperation with the structure feature that the second sleeve segment 21 is sleeved on the first sleeve segment 12 in embodiment 1, the larger fan body 4 does not increase the reserved space of the first containing cavity 11, that is, in the case of a smaller fan pump volume, a relatively high air pressure can also be met during operation.

[0033] Embodiment 3: In order to facilitate the maintenance or disassembly of the fan body 4, improvements are made on the basis of embodiment 2, as shown in Figure 3 In this embodiment, the fan body 4 is completely contained in the second containing cavity 22, and the second containing cavity 22 includes a first cavity 221. The first cavity 221 is in communication with the first containing cavity 11, and the vertical distance between the side wall of the first cavity 221 and the outer wall of the brushless motor 3 is greater than the vertical distance between the side wall of the first containing cavity 11 and the outer wall of the brushless motor 3.

[0034] In the specific implementation process, when the fan body 4 is partially contained in the first containing cavity 11, after the air outlet cylinder 2 is removed, the fan body 4 will be partially blocked by the air inlet bottom shell 1, which will hinder the maintenance or disassembly of the fan body 4. In addition, when the volume of the fan body 4 is large, if the fan body 4 has a part in the first containing cavity 11, it will also increase the volume of the first containing cavity 11, and further increase the volume of the fan pump. The diameter of the first cavity 221 is greater than the diameter of the first containing cavity 11 so as to completely contain the fan body 4.

[0035] Example 4: To facilitate the connection between the air outlet 2 and the air inlet casing 1, and to ensure the smooth entry of the fan body 4 into the air outlet 2, improvements were made based on Example 3, such as... Figure 3 As shown, in this embodiment, the fan body 4 includes an integrated disk 41 and a fan blade 42. The integrated disk 41 is connected to the output shaft of the brushless motor 3. The fan blade 42 is connected to the connecting disk. The fan blade 42 is arc-shaped. The distance between the end of the fan blade 42 near the center of the integrated disk 41 and the air intake bottom shell 1 is greater than the distance between the end of the fan blade 42 near the edge of the integrated disk 41 and the air intake bottom shell 1.

[0036] In the specific implementation process, such as Figure 3 As shown, the cross-section of the fan body 4 is conical. The diameter of the end of the fan body 4 furthest from the first accommodating cavity 11 is much smaller than the diameter of the end of the second accommodating cavity 22 closest to the first accommodating cavity 11, thus making it easier for the fan body 4 to enter the second accommodating cavity 22. Figure 2 As shown, in this embodiment, after the fan blade 42 is connected to the integrated disk 41, the structural strength of the fan blade 42 is better. The arc-shaped fan blade 42, coupled with the gradual change in the width of the fan blade 42, can increase the disturbance of the air by the fan blade 42, thereby increasing the wind pressure generated by the wind pump.

[0037] Example 5: To make the airflow smoother as it converges into the outlet chamber 23, improvements were made based on Example 4, such as... Figure 3 As shown, in this embodiment, the second accommodating cavity 22 further includes a second cavity 222, which is connected to the side of the first cavity 221 away from the first accommodating cavity 11. As the second cavity 222 extends in a direction away from the first cavity 221, its diameter gradually decreases.

[0038] In specific implementation, the cross-section of the second accommodating cavity 22 can be circular, and the cavity diameter refers to the diameter of the circular cross-section. For example... Figure 3 As shown, the shape of the second cavity 222 can not only match the shape of the fan body 4, but also guide the airflow to converge into the air outlet cavity 23, reducing the obstruction of the gas during the convergence process.

[0039] Example 6: To further increase wind pressure, improvements were made based on Example 4, such as... Figures 2-3 As shown, in this embodiment, the gap between adjacent fan blades 42 gradually decreases as it extends toward the center of the integrated disk 41; the fan blade 42 includes: a long blade body 421 and a short blade body 422, and at least one short blade body 422 is provided between adjacent long blade bodies 421.

[0040] In the specific implementation process, such as Figure 2As shown, each arc-shaped fan blade 42 is more gathered near the center of the integrated disc 41 and more dispersed near the edge of the integrated disc 41. When the fan blades 42 are all long blades 421, the number of long blades 421 is limited due to the need to maintain a certain distance between the fan blades 42 near the center of the integrated disc 41, thereby limiting the wind pressure. Therefore, the embodiment increases the short blades 422 as shown, so that the inner end of the short blades 422 is offset from the edge of the integrated disc 41 compared to the long blades 421, and the spacing of the long blades 421 near the center of the integrated disc 41 does not affect the arrangement of the short blades 422, and the arrangement of the short blades 422 can increase the wind pressure output by the fan pump. Figure 2 As shown, the short blades 422 are arranged in the fan body 4, and the inner end of each short blade 422 is offset from the edge of the integrated disc 41 compared to the long blades 421, so that the spacing of the long blades 421 near the center of the integrated disc 41 does not affect the arrangement of the short blades 422, and the arrangement of the short blades 422 can increase the wind pressure output by the fan pump.

[0041] Embodiment 7: In order to increase the wind pressure generated by the fan body 4, the embodiment is improved on the basis of Embodiment 6, as shown in Figure 3 As shown, the air outlet cylinder 2 is also provided with an air outlet cavity 23, which is in communication with one end of the second accommodating cavity 22 away from the first accommodating cavity 11, and the cavity diameter of the air outlet cavity 23 is smaller than the diameter of the integrated disc 41.

[0042] In the specific implementation process, as shown in Figure 3 The cavity diameter of the air outlet cavity 23 can be equal to the cavity diameter of the second cavity 222 away from the first accommodating cavity 11. Reducing the diameter of the air flow channel 111 through the air outlet cavity 23 can increase the wind pressure generated by the fan body 4.

[0043] Embodiment 8: On the basis of Embodiments 1-7, the embodiment provides a detachable connection method of the air inlet bottom shell 1 and the air outlet cylinder 2, as shown in Figure 3 The outer wall of the air inlet bottom shell 1 is provided with external threads, and the inner wall of the second accommodating cavity 22 is provided with internal threads matched with the external threads.

[0044] In the specific implementation process, when assembling the fan pump, the brushless motor 3 is first installed in the first accommodating cavity 11, then the fan body 4 is installed on the output shaft of the brushless motor 3, and after the air outlet cylinder 2 and the air inlet bottom shell 1 are combined, the air outlet cylinder 2 is rotated to complete the assembly of the fan pump.

[0045] Embodiment 9: On the basis of Embodiment 8, the embodiment provides an installation structure of the brushless motor 3, as shown in Figure 1 and Figure 3 The air inlet end of the air inlet bottom shell 1 is provided with a mounting plate 13, the mounting plate 13 is provided with a mounting hole 131 matched with the brushless motor 3, the mounting plate 13 is also provided with an air hole 132, and the brushless motor 3 and the side wall of the first accommodating cavity 11 are left with an air flow channel 111, and the air hole 132 is in communication with the air flow channel 111.

[0046] In the specific implementation process, as shown in Figure 1As shown, four mounting holes 131 are arranged, and the mounting plate 13 is connected with the brushless motor 3 through the mounting holes 131 and screws. Figure 1 As shown, a plurality of air holes 132 are arranged in a ring shape. It should be noted that the air holes 132 are arranged at positions such that the brushless motor 3 does not completely block the air holes 132 after being mounted.

[0047] In order to be used with the compression pump 6, as shown in the embodiment 10, the air outlet cylinder 2 is provided with a first thread 24 at one end away from the air inlet bottom shell 1. Figures 5-6 As shown, the embodiment provides a wind pump assembly, which comprises the expandable brushless mini wind pump and the adapter 5, the air outlet cylinder 2 is provided with a first thread 24 at one end away from the air inlet bottom shell 1, the adapter 5 is provided with a second thread 51 matched with the first thread 24, the side wall of the adapter 5 is provided with a connecting cylinder 52 for connecting with the compression pump 6, and one end of the adapter 5 away from the air outlet cylinder 2 is used for connecting with an air nozzle.

[0048] In the implementation process, the adapter 5 can be used to connect the wind pump with the compression pump 6, and when the compression pump 6 is not needed, the compression pump 6 can be simply disassembled. The adapter 5, the wind pump and the compression pump 6 can be connected through threads.

[0049] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An expandable brushless mini air pump, characterized in that, include: An air intake bottom shell (1) is provided with a first accommodating cavity (11) and a first sleeve section (12). An air outlet (2) is provided with a second sleeve section (21), the second sleeve section (21) is sleeved on the first sleeve section (12) and is detachably connected to the first sleeve section (12), the air outlet (2) is provided with a second accommodating cavity (22), and the first accommodating cavity (11) is connected to the second accommodating cavity (22). A brushless motor (3) is disposed in the first accommodating cavity (11); The fan body (4) is connected to the output shaft of the brushless motor (3), and at least a portion of the fan body (4) is housed in the second accommodating cavity (22).

2. The expandable brushless mini air pump according to claim 1, characterized in that, The diameter of the rotating circumference of the fan body (4) is greater than the maximum distance from the outer wall of the brushless motor (3) to its output shaft axis.

3. The expandable brushless mini air pump according to claim 2, characterized in that, The fan body (4) is completely housed in the second receiving cavity (22), the second receiving cavity (22) comprising: The first cavity (221) is connected to the first accommodating cavity (11). The vertical distance between the side wall of the first cavity (221) and the outer wall of the brushless motor (3) is greater than the vertical distance between the side wall of the first accommodating cavity (11) and the outer wall of the brushless motor (3).

4. The expandable brushless mini air pump according to claim 3, characterized in that, The sector (4) includes: An integrated disk (41) is connected to the output shaft of the brushless motor (3); Fan blade (42) is connected to the integrated disk (41). The fan blade (42) is arc-shaped. The distance between the end of the fan blade (42) near the center of the integrated disk (41) and the air intake bottom shell (1) is greater than the distance between the end of the fan blade (42) near the edge of the integrated disk (41) and the air intake bottom shell (1).

5. The expandable brushless mini air pump according to claim 4, characterized in that, The second accommodating cavity (22) further includes: The second cavity (222) is connected to the side of the first cavity (221) away from the first accommodating cavity (11). As the second cavity (222) extends in a direction away from the first cavity (221), its diameter gradually decreases.

6. The expandable brushless mini air pump according to claim 4, characterized in that, The gap between adjacent fan blades (42) gradually decreases as it extends toward the center of the integrated disk (41); the fan blades (42) include: Long leaf body (421) and short leaf body (422), with at least one short leaf body (422) between adjacent long leaf bodies (421).

7. The expandable brushless mini air pump according to claim 6, characterized in that, The air outlet (2) is also provided with an air outlet chamber (23), which is connected to the end of the second accommodating cavity (22) away from the first accommodating cavity (11). The diameter of the air outlet chamber (23) is smaller than the diameter of the integrated disk (41).

8. The expandable brushless mini air pump according to any one of claims 1-7, characterized in that, The outer wall of the air intake housing (1) is provided with an external thread, and the inner wall of the second accommodating cavity (22) is provided with an internal thread that mates with the external thread.

9. The expandable brushless mini air pump according to claim 8, characterized in that, The air intake end of the air intake shell (1) is provided with a mounting plate (13). The mounting plate (13) is provided with a mounting hole (131) that cooperates with the brushless motor (3). The mounting plate (13) is also provided with an air hole (132). A flow channel (111) is left between the brushless motor (3) and the side wall of the first accommodating cavity (11). The air hole (132) is connected to the flow channel (111).

10. A wind pump assembly, characterized in that, include: The expandable brushless mini air pump according to any one of claims 1-9, wherein the air outlet (2) is provided with a first thread (24) at the end away from the air inlet bottom shell (1); The adapter (5) is provided with a second thread (51) that mates with the first thread (24). The side wall of the adapter (5) is provided with a connecting cylinder (52), which is used to connect to the compression pump (6). The end of the adapter (5) away from the air outlet (2) is used to connect to the air nozzle.

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