CN211082176U

CN211082176U - Portable inflation device

Info

Publication number: CN211082176U
Application number: CN201921144279.5U
Authority: CN
Inventors: 徐火鈞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-07-24
Anticipated expiration: 2029-07-19

Abstract

The utility model discloses a portable air charging device, which comprises a shell, an air transmission component, an air pipe, a driving device and a gear transmission component, wherein the air transmission component is provided with a working cavity, an air transmission end and an air inlet switch are arranged on the air transmission component, and the air inlet switch is positioned in the working cavity; the air pipe is connected with the air transmission component and is communicated with the air transmission end; the driving device is arranged in the shell; the gear transmission assembly is arranged in the shell, the input end of the gear transmission assembly is connected with the output end of the driving device, and the output end of the gear transmission assembly is connected with the gas transmission assembly. Through such technical scheme, during the use, drive arrangement can give the gear drive subassembly with power transmission through the output, and the gear drive subassembly gives the gas transmission subassembly with power transmission, drives the action of gas transmission subassembly then, closes the switch of admitting air so that the gas transmission subassembly passes through gas transmission end with gas propelling movement to trachea, and this kind of structure is comparatively compact, and the transmission is steady reliable, workable, low in production cost, long service life, the gas tightness is good.

Description

Portable inflation device

Technical Field

The utility model relates to an inflation equipment technical field, in particular to portable aerating device.

Background

With the rapid development of science and technology, inflatable products are more and more popular with consumers due to the characteristics of convenient carrying and storage. General inflation process: the inflatable product pushes gas to the gas pipe, and the gas is inflated to the object needing inflation through the gas pipe. The structure of the existing inflatable product is that a transmission mode that a worm gear and a worm drive a cylinder is adopted to carry out inflation action.

The problems with the above structure are: 1. the worm and gear generate heat greatly, so good cooling and lubricating conditions are required during working, and the service life is short; 2. when power is transmitted at a high speed, the worm wheel is usually made of expensive nonferrous metals such as bronze and the like, and the worm wheel and the worm are difficult to manufacture and high in manufacturing cost; 3. and the structure of the cylinder is complex, the air tightness is not good, etc.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a portable aerating device, the transmission is steady, and the gas tightness is better.

The technical scheme adopted for solving the technical problems is as follows: a portable inflation device comprising:

a housing;

the gas transmission assembly is arranged in the shell and provided with a working cavity, a gas transmission end and a gas inlet switch are arranged on the gas transmission assembly, and the gas inlet switch is positioned in the working cavity;

the air pipe is connected with the air conveying assembly and communicated with the air conveying end;

the driving device is arranged in the shell;

the gear transmission assembly is arranged in the shell, the input end of the gear transmission assembly is connected with the output end of the driving device, and the output end of the gear transmission assembly is connected with the gas transmission assembly;

the driving device can drive the gas transmission assembly to act through the gear transmission assembly so as to control the gas inlet switch to be opened or closed.

The inflating device has the following beneficial effects: through such technical scheme, when using aerating device, drive arrangement can give the gear drive subassembly with power transmission through the output, and the gear drive subassembly gives the gas transmission subassembly with power transmission, drives the action of gas transmission subassembly then, closes the switch of admitting air so that the gas transmission subassembly passes through gas transmission end with gas propelling movement to trachea, and this kind of structure is comparatively compact, and the transmission is steady reliable, workable, low in production cost, long service life, the gas tightness is good.

According to portable aerating device, gear drive assembly include the driving gear and with driving gear engaged with driven gear shaft, the driving gear with drive arrangement's output is connected, driven gear shaft rotationally set up in the casing, the gas transmission subassembly with driven gear shaft eccentric connection.

According to the portable air charging device of the utility model, the air transmission component is an air cylinder, the air cylinder comprises a cylinder barrel and a piston rod, the cylinder barrel is fixedly arranged on the shell, and the piston rod is eccentrically connected with the driven gear shaft;

the piston rod is provided with the air inlet switch, the working cavity is an inner cavity of the cylinder barrel, and the air inlet switch is located in the inner cavity of the cylinder barrel.

According to the portable air charging device of the utility model, the air inlet switch comprises a limit concave station, an air inlet channel and a sealing ring, the limit concave station is communicated with the air inlet channel and is arranged at the end part of the piston rod, the sealing ring movable sleeve is arranged on the limit concave station and is abutted against the inner wall of the cylinder barrel, the limit concave station is provided with a front edge surface and a rear edge surface, and a space for the sealing ring to slide is arranged between the front edge surface and the rear edge surface;

when the piston rod moves forwards towards the air pipe, the sealing ring is abutted to the rear edge surface of the limiting concave table to seal the air inlet channel.

According to the portable air charging device of the utility model, one end of the piston rod, which is far away from the air inlet switch, is eccentrically connected to the driven gear shaft through the connecting component;

coupling assembling includes connecting axle and spacing piece, the piston rod with driven gear shaft passes through connecting axle eccentric connection, have on the connecting axle and be located the first annular groove on connecting axle upper portion and being located the second annular groove of the lower part of connecting axle, have the card on the spacing piece and locate spacing convex part in the first annular groove, just spacing piece butt in on the piston rod, driven gear shaft with the junction of connecting axle has the card and locates location convex part in the second annular groove.

According to the utility model discloses a portable aerating device, the piston rod with be provided with the axle sleeve between the connecting axle.

According to portable aerating device, the casing includes first casing and second casing, be provided with a mounting panel on the first casing, the cylinder with driven gear shaft passes through the mounting panel is fixed in on the first casing.

According to portable aerating device, have on the first casing with the concave position of corresponding installation of driven gear shaft, have on the mounting panel with the corresponding mounting hole in upper portion of driven gear shaft, the lower extreme of mounting panel has the supporting part.

According to portable aerating device, driven gear axle includes tooth portion and axial region, the upper and lower both sides of driven gear axle respectively are provided with a bearing, one of them the bearing is installed the axial region with between the supporting part, another the bearing is installed the axial region with between the installation concave position, just the connecting axle is located the inboard of bearing.

According to portable aerating device, be provided with controlling means, battery and switch on the casing, drive arrangement the battery and switch all with the controlling means electricity is connected.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a block diagram of an embodiment of the portable inflator of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the portable inflator of the present invention;

FIG. 3 is an exploded view of an embodiment of the portable inflator of the present invention;

FIG. 4 is an exploded view of the gas delivery assembly and the connection assembly;

FIG. 5 is a block diagram of a gas delivery assembly;

fig. 6 is a structural view of the piston rod.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in fig. 1, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

Referring to fig. 1, the present invention provides a portable inflator, which includes a housing 10 and an air tube 30, wherein the air tube 30 is connected to the housing 10; the housing 10 includes a first housing 11 and a second housing 12, and the first housing 11 and the second housing 12 are connected by a fastener such as a screw.

Referring to fig. 2 to 5, an air delivery assembly 20, a driving device 40 and a gear transmission assembly 50 are disposed in the housing 10, the air delivery assembly 20 has a working chamber, an air delivery end 211 and an air inlet switch 221 are disposed on the air delivery assembly 20, and the air inlet switch 211 is located in the working chamber; the air pipe 30 is connected with the air delivery assembly 20 and is communicated with the air delivery end 211; the driving device 40 is arranged in the shell 10; the gear transmission assembly 50 is arranged in the shell 10, the input end of the gear transmission assembly 50 is connected with the output end of the driving device 40, and the output end of the gear transmission assembly 50 is connected with the gas transmission assembly 20;

the driving device 40 can drive the gas transmission assembly 20 to move through the gear transmission assembly 50 to control the air inlet switch 221 to be opened or closed.

When the air charging device is used, the driving device 40 can transmit power to the gear transmission assembly 50 through the output end, the gear transmission assembly 50 transmits the power to the air transmission assembly 20, then the air transmission assembly 20 is driven to act, and the air inlet switch 221 is closed so that the air transmission assembly 20 pushes air to the air pipe 30 through the air transmission end 211.

In the embodiment of the present invention, the air inlet switch 221 is turned on, and the air enters the working chamber; the air inlet switch 221 is closed and air cannot enter the working chamber.

Referring to fig. 2 and 5, in the embodiment of the present invention, the gear transmission assembly 50 includes a driving gear 51 and a driven gear shaft 52 engaged with the driving gear 51, the driving gear 51 is connected to the output end of the driving device 40, the driven gear shaft 52 is rotatably disposed in the housing 10, and the air delivery assembly 20 is eccentrically connected to the driven gear shaft 52.

When drive arrangement 40 during operation, drive arrangement 40's output can transmit power for driving gear 51, driving gear 51 rotates, driving gear 51 transmits power for driven gear shaft 52 again, and then drives driven gear shaft 52 and takes place to rotate, driven gear shaft 52 transmits power for gas transmission subassembly 20 again, thereby gas transmission subassembly 20 moves, so that gaseous through gas transmission end 211 propelling movement to trachea 30, have simple structure, easily realize, stable performance and easy dismounting's characteristics.

In some of these embodiments, the gear assembly 50 includes a driven gear shaft 52, and a belt drive mechanism is disposed between the gear assembly 50 and the drive device 40, the belt drive mechanism including a small pulley disposed on the drive device 40, a large pulley coaxial with the driven gear shaft 52, and a belt. The driving device 40 provides power for the belt transmission mechanism to drive the gear transmission assembly 50 to rotate, so that the gas transmission assembly 20 is driven to act, and the belt transmission mechanism is stable and reliable in transmission, easy to manufacture, low in production cost and simple and compact in structure.

Referring to fig. 2 to 5, in some embodiments, the air delivery assembly 20 is an air cylinder, the air cylinder includes a cylinder tube 21 and a piston rod 22, the cylinder tube 21 is fixedly disposed on the housing 10, and the piston rod 22 is eccentrically connected to the driven gear shaft 52.

When the driving device 40 works, the output end of the driving device 40 can transmit power to the driving gear 51, the driving gear 51 rotates, the driving gear 51 transmits power to the driven gear shaft 52, the driven gear shaft 52 is driven to rotate, the driven gear shaft 52 transmits power to the piston rod 22, and the piston rod 22 reciprocates along the inside of the cylinder 21. When the piston rod 22 moves towards the air tube 30, the air is pushed to the air tube 30 through the air outlet of the cylinder 21 under the action of pressure. With such a structure, the reciprocating motion of the piston rod 22 can be simply and effectively realized, and the structure is simple, the use is convenient and the operation is reliable.

In the embodiment of the present invention, the gas transmission end 211 is the gas outlet of the cylinder 21.

Referring to fig. 2, 4, 5 and 6, in some embodiments, the piston rod 22 has an intake switch 221 thereon, the working chamber is an inner chamber of the cylinder 21, and the intake switch 221 is located in the inner chamber of the cylinder 21. Be provided with air inlet switch 221, can control whether gaseous through the piston rod 22 get into the inner chamber of cylinder 21 in, simple structure, the simple operation.

In some embodiments, the air inlet switch 221 includes a limiting recess 2211, an air inlet passage 2212, and a sealing ring 2213, the limiting recess 2211 is communicated with the air inlet passage 2212 and both open to the end of the piston rod 22, the sealing ring 2213 is movably sleeved on the limiting recess 2211 and abuts against the inner wall of the cylinder 21, the limiting recess 2211 has a front edge 22111 and a rear edge 22112, and a space for the sealing ring 2213 to slide is formed between the front edge 22111 and the rear edge 22112.

When the driving device 40 drives the piston rod 22 to move away from the air tube 30 through the gear transmission assembly 50, the sealing ring 2213 abuts on the front edge surface 22111 of the limiting concave table 2211, and the air in the housing 10 enters the cylinder 21 along the air inlet passage 2212.

When the driving device 40 drives the piston rod 22 to move towards the air tube 30 through the gear transmission assembly 50, the sealing ring 2213 abuts against the rear edge face 22112 of the limiting concave table 2211, the air inlet passage 2212 is blocked, a sealing effect is achieved between the piston rod 22 and the cylinder 21, and air in the cylinder 21 is prevented from flowing into the shell 10.

Of course, in some embodiments, the air inlet passage 2212 is an air inlet hole disposed on the cylinder 21, and when the piston rod 22 moves away from the air tube 30, the air inlet hole can be located in a stroke range between an end face of the piston rod 22 facing the air tube 30 and an air outlet of the cylinder 21, so that air enters the cylinder; when the piston rod 22 moves towards the air pipe 30, at this time, the end face of the piston rod 22 facing the air pipe 30 can move to the front side of the air inlet hole, so that the cavity surrounded by the cylinder 21 and the piston rod 22 is reduced to be separated from the air inlet hole. Because the piston rod 22 is provided with the sealing ring 2213, the gas in the cavity can be pushed to the gas pipe 30 by the piston rod 22.

Referring to fig. 2 to 5, in the embodiment of the present invention, the end of the piston rod 22 away from the air inlet switch 221 is eccentrically connected to the driven gear shaft 52 through the connecting assembly 60, so as to ensure the structural stability and the easy assembly and disassembly.

In some embodiments, the connecting assembly 60 includes a connecting shaft 61 and a limiting piece 62, the piston rod 22 and the driven gear shaft 52 are eccentrically connected via the connecting shaft 61, the connecting shaft 61 has a first annular groove 611 located at an upper portion of the connecting shaft 61 and a second annular groove 612 located at a lower portion of the connecting shaft 61, the limiting piece 62 has a limiting protrusion 621 engaged in the first annular groove 611, the limiting piece 62 abuts against the piston rod 22, and a connection portion of the driven gear shaft 52 and the connecting shaft 61 has a positioning protrusion 5221 engaged in the second annular groove 612.

The piston rod 22 and the driven gear shaft 52 are eccentrically connected through the connecting shaft 61, the limiting convex part 621 of the limiting sheet 62 is clamped in the first annular groove 611, and the positioning convex part 5221 is clamped in the second annular groove 612, so that the relative position between the piston rod 22 and the driven gear shaft 52 is fixed, the piston rod 22 is prevented from moving, the stability of the structure is ensured, and the dismounting and the mounting are convenient.

In some of these embodiments, a bushing 81 is provided between the piston rod 22 and the connecting shaft 61. Reducing rotational wear between the piston rod 22 and the connecting shaft 61. Of course, a gasket 82 is provided between the piston rod 22 and the driven gear shaft 52, and the gasket is sleeved on the connecting shaft 61, so that the rotational wear between the piston rod 22 and the driven gear shaft 52 is reduced.

In some embodiments, the connecting assembly 60 is a connecting post disposed on the end of the piston rod 22 remote from the inlet switch 221, the piston rod 22 and the connecting post are integrally formed, and the connecting post is eccentrically connected to the driven gear shaft 52. With this structure, the piston rod 22 and the driven gear shaft 52 are easily assembled, and the structure is simple and compact.

Referring to fig. 1 to 3, it is preferable that in some embodiments, a mounting plate 70 is provided on the first housing 11, and the cylinder 21 and the driven gear shaft 52 are fixed to the first housing 11 by the mounting plate 70. The mounting plate 70 is attached to the first housing 11 by a fastener such as a screw.

In some embodiments, the first housing 11 has a mounting recess 111 corresponding to the driven gear shaft 52, the mounting plate 70 has a mounting hole 71 corresponding to an upper portion of the driven gear shaft 52, and the mounting plate 70 has a support portion 72 at a lower end thereof.

By mounting the driven gear shaft 52 on the mounting recess 111 of the first housing 11 and the mounting hole 71 of the mounting plate 70, the relative position between the driven gear shaft 52 and the housing 10 is fixed; the mounting plate 70 has a support portion 72 at a lower end thereof such that a mounting space is formed between the mounting plate 70 and the first housing 11, so that the driven gear shaft 52 can rotate relative to the first housing 11 at the mounting space, thereby moving the piston rod 22 to reciprocate.

In the embodiment of the present invention, the driven gear shaft 52 includes the tooth portion 521 and the shaft portion 522, the upper and lower sides of the driven gear shaft 52 are respectively provided with a bearing 83, one of the bearings 83 is installed between the shaft portion 522 and the supporting portion 72, the other bearing 83 is installed between the shaft portion 522 and the installation recess 111, and the connecting shaft 61 is located inside the bearing 83.

With the above-described structure, the tooth portions 521 of the driven gear shaft 52 are located between the support portions 72 of the mounting plate 70 and the first housing 11, and the mounting plate 70 restricts the relative positions of the driven gear shaft 52 and the first housing 11, preventing the driven gear shaft 52 from axially shifting.

Referring to fig. 1 and 2, in some embodiments, a control device 91 and a battery 92 are disposed in the housing 10, a power switch 93 is disposed on the second housing 12, and the driving device 40, the battery 92 and the power switch 93 are all electrically connected to the control device 91, so that the structure is simple and the operation is convenient.

It should be noted that, in the embodiment of the present invention, the control device 91 is a control circuit board.

In the embodiment of the present invention, the driving device 40 is a brushless motor. The brushless motor is small in size, so that the size of the housing 10 is small, the weight of the motor and the housing 10 is small, and the brushless motor is convenient to carry.

In the embodiment of the present invention, a charging interface 94 is provided on the housing 10, and the charging interface 94 is electrically connected to the control device 91 to supply power to the battery 92.

In some embodiments, the air tube 30 is detachably connected to the air outlet of the cylinder 21 by a screw thread, so as to facilitate disassembly and maintenance. When in use, one end of the air pipe 30 is connected and communicated with an object to be inflated, and the other end of the air pipe 30 is communicated with the air outlet of the cylinder 21, so that the inflation action is completed through the inflation device.

It should be noted that in some embodiments, the air tube 30 has a one-way valve. When the piston rod 22 reciprocates along the cylinder 21, when the piston rod 22 moves towards the air pipe 30 and the cylinder 21 pushes air to the air pipe 30, the air can only flow to the air outlet end of the air pipe 30 through the one-way valve by passing through the air inlet end of the air pipe 30 in one way and flows into an object to be inflated; when the piston rod 22 moves away from the air tube 30, the air tube 30 cannot flow from the air outlet end of the air tube 30 to the air inlet end of the air tube 30 through the one-way valve and into the cylinder 21.

The utility model discloses theory of operation of embodiment: when the air inflation device is used for inflating air, the control device 91 is started, the control device 91 controls the driving device 40 to act, the driving device 40 drives the driving gear 51 to rotate, the driving gear 51 drives the driven gear shaft 52 to rotate, the driven gear shaft 52 drives the piston rod 22 to reciprocate along the cylinder 21, and therefore air enters the air pipe 30 through the air outlet of the cylinder 21, and the air inflation action is completed.

The above embodiments are merely preferred embodiments of the present invention, and other embodiments are also possible. Equivalent modifications or substitutions may be made by those skilled in the art without departing from the spirit of the invention, and such equivalent modifications or substitutions are intended to be included within the scope of the claims set forth herein.

Claims

1. A portable inflation device, comprising: the method comprises the following steps:

a housing (10);

the gas transmission assembly (20) is arranged in the shell (10), the gas transmission assembly (20) is provided with a working cavity, a gas transmission end (211) and an air inlet switch (221) are arranged on the gas transmission assembly (20), and the air inlet switch (221) is positioned in the working cavity;

the air pipe (30), the air pipe (30) is connected with the air delivery component (20) and communicated with the air delivery end (211);

a drive device (40) disposed within the housing (10);

the gear transmission assembly (50) is arranged in the shell (10), the input end of the gear transmission assembly (50) is connected with the output end of the driving device (40), and the output end of the gear transmission assembly (50) is connected with the gas transmission assembly (20);

the driving device (40) can drive the air delivery assembly (20) to act through the gear transmission assembly (50) so as to control the air inlet switch (221) to be switched on or switched off.

2. The portable inflation apparatus of claim 1, wherein: the gear transmission assembly (50) comprises a driving gear (51) and a driven gear shaft (52) meshed with the driving gear (51), the driving gear (51) is connected with the output end of the driving device (40), the driven gear shaft (52) is rotatably arranged in the shell (10), and the gas transmission assembly (20) is eccentrically connected with the driven gear shaft (52).

3. The portable inflation apparatus of claim 2, wherein: the gas transmission assembly (20) is an air cylinder, the air cylinder comprises a cylinder barrel (21) and a piston rod (22), the cylinder barrel (21) is fixedly arranged on the shell (10), and the piston rod (22) is eccentrically connected with the driven gear shaft (52);

the piston rod (22) is provided with the air inlet switch (221), the working cavity is an inner cavity of the cylinder barrel (21), and the air inlet switch (221) is located in the inner cavity of the cylinder barrel (21).

4. The portable inflation apparatus of claim 3, wherein: the air inlet switch (221) comprises a limiting concave table (2211), an air inlet channel (2212) and a sealing ring (2213), the limiting concave table (2211) is communicated with the air inlet channel (2212) and is respectively arranged at the end part of the piston rod (22), the sealing ring (2213) is movably sleeved on the limiting concave table (2211) and is abutted against the inner wall of the cylinder barrel (21), the limiting concave table (2211) is provided with a front edge surface (22111) and a rear edge surface (22112), and a distance for the sealing ring (2213) to slide is formed between the front edge surface (22111) and the rear edge surface (22112);

when the piston rod (22) moves forwards towards the air pipe (30), the sealing ring (2213) abuts against the rear edge surface (22112) of the limit concave table (2211) to close the air inlet channel (2212).

5. The portable inflation apparatus of claim 4, wherein: one end of the piston rod (22) far away from the air inlet switch (221) is eccentrically connected to the driven gear shaft (52) through a connecting assembly (60);

coupling assembling (60) are including connecting axle (61) and spacing piece (62), piston rod (22) with driven gear axle (52) pass through connecting axle (61) eccentric connection, have on connecting axle (61) and be located first annular groove (611) on connecting axle (61) upper portion and be located second annular groove (612) of the lower part of connecting axle (61), spacing piece (62) are gone up to have the card and are located spacing convex part (621) in first annular groove (611), just spacing piece (62) butt in on piston rod (22), driven gear axle (52) with the junction of connecting axle (61) has the card and locates location convex part (5221) in second annular groove (612).

6. The portable inflation apparatus of claim 5, wherein: and a shaft sleeve (81) is arranged between the piston rod (22) and the connecting shaft (61).

7. The portable inflation apparatus of claim 6, wherein: the shell (10) comprises a first shell (11) and a second shell (12), a mounting plate (70) is arranged on the first shell (11), and the cylinder barrel (21) and the driven gear shaft (52) are fixed on the first shell (11) through the mounting plate (70).

8. The portable inflation apparatus of claim 7, wherein: the first shell (11) is provided with a mounting concave position (111) corresponding to the driven gear shaft (52), the mounting plate (70) is provided with a mounting hole (71) corresponding to the upper part of the driven gear shaft (52), and the lower end of the mounting plate (70) is provided with a supporting part (72).

9. The portable inflation apparatus of claim 8, wherein: the driven gear shaft (52) comprises a tooth part (521) and a shaft part (522), bearings (83) are respectively arranged on the upper side and the lower side of the driven gear shaft (52), one bearing (83) is installed between the shaft part (522) and the supporting part (72), the other bearing (83) is installed between the shaft part (522) and the installation concave part (111), and the connecting shaft (61) is located on the inner side of the bearing (83).

10. The portable inflation apparatus of claim 1, wherein: the shell (10) is provided with a control device (91), a battery (92) and a power switch (93), and the driving device (40), the battery (92) and the power switch (93) are electrically connected with the control device (91).