CN116727317A

CN116727317A - Portable dust remover

Info

Publication number: CN116727317A
Application number: CN202310481875.7A
Authority: CN
Inventors: 王耀龙; 张永贵; 王卓彧; 成向阳; 许文杰; 韩凤飞; 王磊; 赵崭
Original assignee: North Weijiamao Coal Power Co Ltd
Current assignee: North Weijiamao Coal Power Co Ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-09-12

Abstract

The application discloses a portable dust remover, which belongs to the technical field of dust removers and comprises a mounting assembly, a dust removing assembly and a dust removing assembly, wherein the mounting assembly comprises a shell part, the interior of the shell part is hollow, and a dust collecting opening and a dust outlet are arranged on the shell part; the negative pressure component comprises a driving piece arranged on the shell piece and a negative pressure piece arranged in the shell piece and in transmission connection with the driving piece; the dust removing assembly comprises a first hairbrush piece which is arranged on the outer side of the dust collecting opening and is in transmission connection with the driving piece. The dust collection treatment is carried out on the box body to be dedusted through the negative pressure component, the diameter of the first hairbrush piece of the dust collection component can be changed, the effect of being capable of adapting to the corner of the inner wall of the box body and being better in fit with the corner of the inner wall of the box body is achieved, and the dust collection effect is better.

Description

Portable dust remover

Technical Field

The application relates to the technical field of dust collectors, in particular to a portable dust collector.

Background

The dust is easy to gather and adhere on the inner wall of the high-low voltage switch shell of the mobile substation on the coal mine, so that the dust needs to be cleaned regularly, the work of the mobile substation is prevented from being influenced, the original oxygen belt is used for blowing the air pipe against the inner wall of the shell, and only the dust can be blown but sundries in the shell cannot be cleaned out, so that the normal operation of equipment is influenced. Therefore, a professional dust remover is required to be used for removing dust, but due to the consideration of dust removal efficiency, the existing dust remover is often larger in the setting of the hairbrush of the dust remover, so that the dust removal area in unit time is improved, but the setting of the large hairbrush cannot be attached when the inner wall corner of the shell is cleaned, the cleaning effect is poor, the hairbrush with different sizes can be replaced in the existing mode for cleaning, and the replacement process is also very complicated.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.

The present application has been made in view of the above and/or problems with existing dust collectors.

Therefore, the application aims to solve the problems that the size of a hairbrush of the dust remover cannot be adjusted, the hairbrush cannot be better attached to the corner of the inner wall of the box body, and the dust removing effect is poor.

In order to solve the technical problems, the application provides the following technical scheme: the portable dust remover comprises a mounting assembly, a dust collecting device and a dust collecting device, wherein the mounting assembly comprises a shell piece, the interior of the shell piece is hollow, and a dust collecting hole and a dust outlet are formed in the shell piece; the negative pressure component comprises a driving piece arranged on the shell piece and a negative pressure piece arranged in the shell piece and in transmission connection with the driving piece; the dust removing assembly comprises a first hairbrush piece which is arranged on the outer side of the dust collecting opening and is in transmission connection with the driving piece.

As a preferable embodiment of the portable dust collector of the application, wherein: the dust removal assembly further comprises a filter plate, and the filter plate is detachably arranged on the dust outlet.

As a preferable embodiment of the portable dust collector of the application, wherein: the dust removing assembly further comprises a second brush piece which is rotatably arranged in the shell piece and in transmission connection with the driving piece, and the second brush piece is suitable for being abutted against the filter plate and used for cleaning dust attached to the filter plate.

As a preferable embodiment of the portable dust collector of the application, wherein: the driving piece is including setting up the motor of the bottom of casing spare, the output of motor is located in the casing spare, fixed mounting has the main shaft on the output of motor, the cover is equipped with the worm on the main shaft.

As a preferable embodiment of the portable dust collector of the application, wherein: the driving piece further comprises a first auxiliary shaft rotatably arranged in the shell piece, one end of the first auxiliary shaft extends out of the dust collection opening, the central axis of the first auxiliary shaft is perpendicular to the central axis of the main shaft, and a worm wheel meshed with the worm is sleeved on the first auxiliary shaft.

As a preferable embodiment of the portable dust collector of the application, wherein: the driving piece further comprises two second auxiliary shafts rotatably arranged in the shell piece, the central axes of the two second auxiliary shafts are parallel to the central axis of the first auxiliary shaft, and the second auxiliary shafts are in transmission connection with the main shaft.

As a preferable embodiment of the portable dust collector of the application, wherein: the negative pressure piece comprises a one-way blade, the one-way blade is arranged on the first auxiliary shaft, and the negative pressure generated by the one-way blade sucks dust at the dust suction port into the shell piece and is discharged from the dust outlet.

As a preferable embodiment of the portable dust collector of the application, wherein: the first brush piece includes with first countershaft fixed connection's installation cover, be equipped with at least one mounting groove on the periphery of installation cover, elastic mounting has the brush strip in the mounting groove, the bottom of brush strip is equipped with the push pedal, the push pedal passes the mounting groove and extend to the inside of installation cover.

As a preferable embodiment of the portable dust collector of the application, wherein: the first brush piece further comprises a third auxiliary shaft rotatably mounted in the mounting sleeve, a bearing is arranged on the first auxiliary shaft, a horizontally arranged limiting rod is rotatably mounted on the outer wall of the bearing, one end of the limiting rod penetrates through the mounting sleeve and extends into the mounting sleeve, the other end of the limiting rod is in sliding connection with the shell piece, a limiting part is arranged at the end part of the limiting rod, which is positioned in the mounting sleeve, a limiting ring is fixedly sleeved on the third auxiliary shaft, and the limiting part is suitable for being clamped with the limiting ring;

the driven gear is fixed on the third auxiliary shaft, the rotary handle is further arranged on the mounting sleeve, the driving gear is arranged at the end part of the rotary handle, which is positioned on the mounting sleeve, and is meshed with the driven gear, the rotary handle drives the third auxiliary shaft to rotate, and the cam part which is in contact with the push plate is further arranged on the third auxiliary shaft.

As a preferable embodiment of the portable dust collector of the application, wherein: the locking assembly comprises a first wedge block and a second wedge block, the first wedge block is elastically installed on the installation sleeve, the second wedge block is arranged on the limiting rod, and the first wedge block is in contact with the second wedge block.

The application has the beneficial effects that: the dust collection treatment is carried out on the box body to be dedusted through the negative pressure component, the diameter of the first hairbrush piece of the dust collection component can be changed, the effect of being capable of adapting to the corner of the inner wall of the box body and being better in fit with the corner of the inner wall of the box body is achieved, and the dust collection effect is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a structural view of a portable dust collector.

Fig. 2 is a structural view of a housing member of the portable dust collector.

Fig. 3 is a block diagram of a negative pressure assembly of the portable dust collector.

Fig. 4 is a structural view of a dust removing assembly of the portable dust remover.

Fig. 5 is a side view of a dust collection assembly of the portable dust collector.

Fig. 6 is another perspective view of a dust collection assembly of the portable dust collector.

Fig. 7 is a structural view of a locking assembly of the portable dust collector.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 7, there is provided a portable dust collector according to a first embodiment of the present application, which includes a mounting assembly 100, a negative pressure assembly 200, and a dust removing assembly 300, wherein the mounting assembly 100 is used to provide a mounting place for components, the negative pressure assembly 200 is used to generate a negative pressure in the mounting assembly 100 capable of sucking dust, and the dust removing assembly 300 is used to brush off dust adhered to a surface of a case and can adjust its size to adapt to corners of an inner wall of the case, thereby better scraping dust from corners of the inner wall of the case.

Specifically, the installation component 100 includes a housing part 101, the interior of the housing part 101 is hollow, both ends all are equipped with the opening about the housing part 101, are dust absorption mouth 101a and the dust outlet 101b of left end of right-hand member respectively, and the axis of dust absorption mouth 101a coincides with the axis of dust outlet 101b, and during the use, the dust can enter into the housing part 101 through dust absorption mouth 101a again by the discharge 101 b.

Preferably, the negative pressure assembly 200 comprises a driving member 201 and a negative pressure member 202, wherein the driving member 201 is arranged at the bottom of the casing member 101, the negative pressure member 202 is arranged inside the casing member 101, the driving member 201 is connected with the negative pressure member 202, and in use, the driving member 201 can drive the negative pressure member 202 to rotate, so that negative pressure can be generated inside the casing member 101, and dust tends to move from the dust collection port 101a to the dust outlet 101 b.

Further, the dust removal assembly 300 comprises a first brush member 301, the first brush member 301 is arranged on the outer side of the dust collection opening 101a, the central axis of the first brush member 301 is coincident with the central axis of the dust collection opening 101a, the first brush member 301 is also in transmission connection with the driving member 201, when the dust removal assembly is used, the driving member 201 drives the first brush member 301 and the negative pressure member 202 to rotate simultaneously, so that dust can be scraped conveniently, dust can be sucked simultaneously by the dust remover, the dust removal effect is better, the size of the first brush member 301 can be adjusted manually, and therefore the dust removal assembly can adapt to the corner of the inner wall of the box body, and therefore dust at the corner of the inner wall of the box body can be removed better.

When the dust remover is used, an operator starts the driving piece 201 firstly, drives the first brush piece 301 and the negative pressure piece 202 to rotate simultaneously through the driving piece 201, so that the dust remover can scrape dust and suck dust, namely, the dust on the inner wall of the box body is removed by the dust remover firstly, and then the first brush piece 301 is manually adjusted, so that the size of the first brush piece 301 can adapt to the shape of the corner of the inner wall of the box body, and the dust on the corner of the inner wall of the box body is removed better.

Example 2

Referring to fig. 1 to 7, a second embodiment of the present application is based on the previous embodiment.

Specifically, the dust removing assembly 300 further includes a filter plate 302 and a dust collecting box, the filter plate 302 is detachably mounted on the housing member 101 through bolts and located on the dust outlet 101b of the housing member 101, a plurality of filter holes are formed in the filter plate 302, large-particle dust can be filtered through the filter holes, the dust collecting box is arranged at the bottom of the housing member 101 and is communicated with the inside of the housing member 101, the dust collecting box is located at the front end of the filter plate 302, and the dust filtered off by the filter plate 302 falls into the dust collecting box.

Preferably, the dust removing assembly 300 further comprises a second brush member rotatably mounted in the housing member 101 and in driving connection with the driving member 201, the second brush member being adapted to contact the filter plate 302, and in use, the driving member 201 is adapted to drive the second brush member to rotate, thereby cleaning dust adhering to the filter plate 302 and avoiding the dust from blocking the filter holes.

Preferably, the driving member 201 comprises a motor, the motor is vertically arranged at the bottom of the shell member 101, an output end of the motor vertically extends into the shell member 101, a spindle 201b is vertically and fixedly arranged at the output end of the motor, the motor can drive the spindle 201b to rotate, a worm 201c is sleeved on the spindle 201b, and a central axis of the worm 201c coincides with a central axis of the spindle 201 b.

Preferably, the driving member 201 further includes a first auxiliary shaft 201d, the first auxiliary shaft 201d is rotatably installed in the housing member 101, one end of the first auxiliary shaft 201d extends out of the dust suction port 101a, the first brush member 301 is disposed at an end of the first auxiliary shaft 201d extending out of the dust suction port 101a, a central axis of the first auxiliary shaft 201d is perpendicular to a central axis of the main shaft 201b, a worm wheel 201e meshed with the worm 201c is sleeved on the first auxiliary shaft 201d, and in use, the motor drives the main shaft 201b to rotate, and the main shaft 201b drives the first auxiliary shaft 201d to rotate through the worm 201c and the worm wheel 201e, so that the first brush member 301 is driven to rotate.

Preferably, the driving member 201 further includes a second auxiliary shaft 201f rotatably installed in the housing member 101, the second auxiliary shaft 201f is provided with two, central axes of the two second auxiliary shafts 201f are parallel to the central axis of the first auxiliary shaft 201d, the two second auxiliary shafts 201f are symmetrically arranged relative to the central axis of the first auxiliary shaft 201d, the second auxiliary shaft 201f is in transmission connection with the main shaft 201b, the second brush member is arranged at an end part of the second auxiliary shaft 201f far away from the main shaft 201b, a driving bevel gear is arranged on the main shaft 201b, a driven bevel gear is arranged on the second auxiliary shaft 201f, the driving bevel gear is meshed with the driven bevel gear, when the motor drives the main shaft 201b to rotate, the main shaft 201b drives the second auxiliary shaft 201f to rotate through the driving bevel gear and the driven bevel gear, and the second auxiliary shaft 201f drives the second brush member to rotate.

Further, the negative pressure member 202 includes a unidirectional blade 202a, the unidirectional blade 202a is disposed on the first auxiliary shaft 201d, the central axis of the unidirectional blade 202a coincides with the central axis of the first auxiliary shaft 201d, the motor drives the main shaft 201b to rotate, thereby driving the unidirectional blade 202a to rotate, and negative pressure can be generated when the unidirectional blade 202a rotates, so that dust at the dust suction port 101a tends to enter the housing member 101 and be discharged from the dust outlet 101 b.

When the dust remover is used, an operator starts the motor, the first auxiliary shaft 201d and the second auxiliary shaft 201f are simultaneously driven to rotate through the main shaft 201b, the first auxiliary shaft 201d can simultaneously drive the unidirectional blades 202a and the first brush piece 301 to rotate, the dust remover achieves the effect of removing dust while absorbing dust, the dust removing effect is better, the first auxiliary shaft 201d can simultaneously drive the two second auxiliary shafts 201f to rotate, the second brush piece arranged on the second auxiliary shaft 201f can brush dust adsorbed on the filter plate 302, and the filter plate 302 is prevented from being blocked by dust.

Example 3

Referring to fig. 1 to 7, a third embodiment of the present application is based on the first two embodiments.

Specifically, the first brush member 301 includes a mounting sleeve 301a, the shape of the mounting sleeve 301a is a cylindrical shell, one end of the mounting sleeve 301a is fixedly connected with the first auxiliary shaft 201d, at least one mounting groove is formed in the circumferential surface of the mounting sleeve 301a, three mounting grooves are uniformly formed in the circumferential direction of the mounting sleeve 301a, a brush strip 301b is arranged in each mounting groove, a spring connected with the mounting groove is arranged at the bottom of each brush strip 301b, a push plate 301c is further arranged at the bottom of each brush strip 301b, the push plate 301c penetrates through each mounting groove and extends to the inside of the mounting sleeve 301a, and in an initial state, a part of each brush strip 301b is located outside each mounting groove under the action of the spring.

Preferably, the first brush member 301 further comprises a third auxiliary shaft 301d, the third auxiliary shaft 301d is rotatably mounted at the other end of the mounting sleeve 301a through a bearing 301e, the third auxiliary shaft 301d is positioned in the mounting sleeve 301a, a driven gear 301h is fixed on the third auxiliary shaft 301d, a rotating handle 301i is rotatably mounted on the end face of the mounting sleeve 301a close to the dust suction port 101a, one end of the rotating handle 301i extends into the mounting sleeve 301a, a driving gear is arranged at the end of the rotating handle 301i positioned in the mounting sleeve 301a and meshed with the driven gear 301h, the rotating handle 301i is rotated to drive the third auxiliary shaft 301d to rotate through the driving gear and the driven gear 301h, a cam portion 301d-1 which is abutted against the push plate 301c is further arranged on the third auxiliary shaft 301d, and when the third auxiliary shaft 301d rotates, the cam portion 301d-1 slides and rubs with the push plate 301c, the brush bar 301b moves towards the direction close to the central axis of the mounting sleeve 301a under the action of a spring, so that the size of the brush member 301 is reduced to fit into the corner of the brush wall of the first member.

Preferably, the bearing 301e is arranged on the first auxiliary shaft 201d, the bearing 301e is located at the outer side of the mounting sleeve 301a, a horizontally arranged limit rod 301f is rotatably arranged on the outer wall of the bearing 301e, one end of the limit rod 301f penetrates through the mounting sleeve 301a and extends into the mounting sleeve 301a, the other end of the limit rod 301f is slidably connected with the shell member 101, the limit rod 301f can only axially move but cannot rotate, when the first auxiliary shaft 201d rotates, the limit rod 301f cannot rotate, the end, located in the mounting sleeve 301a, of the limit rod 301f is provided with the limit part 301f-1, the third auxiliary shaft 301d is fixedly sleeved with the limit ring 301g, and the limit part 301f-1 of the limit rod 301f is clamped with the limit ring 301g through rotation of the limit rod 301 f.

Preferably, the locking assembly 400 further comprises a first wedge block 401 and a second wedge block 402, wherein a spring connected with the inner wall of the mounting sleeve 301a is arranged at the bottom of the first wedge block 401, the second wedge block 402 is arranged on the limit rod 301f, the length direction of the first wedge block 401 is perpendicular to the middle wiring direction of the second wedge block 402, and the first wedge block 401 can be abutted against one end of the second wedge block 402, so that the limit part 301f-1 is prevented from loosening from the limit ring 301 g; when the mounting sleeve 301a rotates, the first wedge 401 is subject to centrifugal action and moves towards the center far away from the mounting sleeve 301a, when the first wedge 401 moves, the second wedge 402 is pressed to move, the second wedge 402 presses the limiting part 301f-1, the limiting part 301f-1 is prevented from loosening from the limiting ring 301g, and the faster the mounting sleeve 301a rotates, the tighter the clamping between the limiting part 301f-1 and the limiting ring 301g, the less likely the loosening.

In order to facilitate understanding of the technical solution of the present application, the following briefly describes the working procedure thereof:

an operator starts a motor, and drives a first auxiliary shaft 201d and a second auxiliary shaft 201f to rotate simultaneously through a main shaft 201b, the first auxiliary shaft 201d can drive a one-way blade 202a and a first brush member 301 to rotate simultaneously, so that the dust remover achieves the effects of removing dust and absorbing dust, and the first auxiliary shaft 201d can drive two second auxiliary shafts 201f to rotate simultaneously, so that a second brush member arranged on the second auxiliary shaft 201f can brush dust adsorbed on a filter plate 302;

when the mounting sleeve 301a rotates, the first wedge 401 is subject to centrifugal action and moves towards the center far away from the mounting sleeve 301a, when the first wedge 401 moves, the second wedge 402 is pressed to move, the second wedge 402 presses the limiting part 301f-1, the limiting part 301f-1 is prevented from loosening from the limiting ring 301g, and the faster the mounting sleeve 301a rotates, the tighter the clamping between the limiting part 301f-1 and the limiting ring 301g, the less likely the loosening.

It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.

Claims

1. A portable dust remover, characterized in that: comprising the steps of (a) a step of,

the installation assembly (100) comprises a shell (101), wherein the shell (101) is hollow, and a dust collection port (101 a) and a dust outlet (101 b) are formed in the shell (101);

a negative pressure assembly (200) comprising a driving member (201) arranged on the housing member (101), and a negative pressure member (202) arranged in the housing member (101) and in transmission connection with the driving member (201);

the dust removing assembly (300) comprises a first hairbrush piece (301) which is arranged outside the dust collecting opening (101 a) and is in transmission connection with the driving piece (201).

2. The portable duster according to claim 1, wherein: the dust removal assembly (300) further comprises a filter plate (302), and the filter plate (302) is detachably arranged on the dust outlet (101 b).

3. The portable duster as claimed in claim 2, wherein: the dust removal assembly (300) further comprises a second brush member (303) rotatably mounted in the housing member (101) and in driving connection with the driving member (201), the second brush member (303) being adapted to be in contact with the filter plate (302) and for cleaning dust adhering to the filter plate (302).

4. A portable dust collector as claimed in claim 1 or 2, wherein: the driving piece (201) comprises a motor arranged at the bottom of the shell piece (101), an output end of the motor is located in the shell piece (101), a main shaft (201 b) is fixedly installed at the output end of the motor, and a worm (201 c) is sleeved on the main shaft (201 b).

5. The portable duster according to claim 4, wherein: the driving piece (201) further comprises a first auxiliary shaft (201 d) rotatably installed in the shell piece (101), one end of the first auxiliary shaft (201 d) extends out of the dust collection opening (101 a), the central axis of the first auxiliary shaft (201 d) is perpendicular to the central axis of the main shaft (201 b), and a worm wheel (201 e) meshed with the worm (201 c) is sleeved on the first auxiliary shaft (201 d).

6. The portable duster according to claim 5, wherein: the driving piece (201) further comprises second auxiliary shafts (201 f) rotatably installed in the shell piece (101), two auxiliary shafts (201 f) are arranged, the central axes of the two second auxiliary shafts (201 f) are parallel to the central axis of the first auxiliary shaft (201 d), and the second auxiliary shafts (201 f) are in transmission connection with the main shaft (201 b).

7. The portable duster according to claim 5 or 6, wherein: the negative pressure piece (202) comprises a one-way blade (202 a), the one-way blade (202 a) is arranged on the first auxiliary shaft (201 d), and negative pressure generated by the one-way blade (202 a) sucks dust at the dust suction port (101 a) into the shell piece (101) and discharges the dust from the dust outlet (101 b).

8. The portable duster according to claim 5 or 6, wherein: the first brush piece (301) comprises a mounting sleeve (301 a) fixedly connected with the first auxiliary shaft (201 d), at least one mounting groove is formed in the circumferential surface of the mounting sleeve (301 a), a brush strip (301 b) is elastically mounted in the mounting groove, a pushing plate (301 c) is arranged at the bottom of the brush strip (301 b), and the pushing plate (301 c) penetrates through the mounting groove and extends to the inside of the mounting sleeve (301 a).

9. The portable duster according to claim 8, wherein: the first brush piece (301) further comprises a third auxiliary shaft (301 d) rotatably mounted in the mounting sleeve (301 a), a bearing (301 e) is arranged on the first auxiliary shaft (201 d), a horizontally arranged limit rod (301 f) is rotatably mounted on the outer wall of the bearing (301 e), one end of the limit rod (301 f) penetrates through the mounting sleeve (301 a) and extends into the mounting sleeve (301 a), the other end of the limit rod (301 f) is in sliding connection with the shell piece (101), a limit part (301 f-1) is arranged at the end of the limit rod (301 f) located in the mounting sleeve (301 a), a limit ring (301 g) is fixedly sleeved on the third auxiliary shaft (301 d), and the limit part (301 f-1) is suitable for being in clamping connection with the limit ring (301 g);

the driven gear (301 h) is fixed on the third auxiliary shaft (301 d), the rotary handle (301 i) is further arranged on the mounting sleeve (301 a), the driving gear is arranged at the end portion of the rotary handle (301 i) located on the mounting sleeve (301 a), the driving gear is meshed with the driven gear (301 h) and the rotary handle (301 i), the rotary handle (301 i) drives the third auxiliary shaft (301 d) to rotate, and the cam portion (301 d-1) which is in contact with the pushing plate (301 c) is further arranged on the third auxiliary shaft (301 d).

10. The portable duster according to claim 9, wherein: still include locking subassembly (400), including first wedge (401) and second wedge (402), first wedge (401) elastic mounting is in on installation sleeve (301 a), second wedge (402) set up on gag lever post (301 f), first wedge (401) with second wedge (402) are inconsistent.