CN215305469U

CN215305469U - Rotary dust collector floor brush

Info

Publication number: CN215305469U
Application number: CN202121038511.4U
Authority: CN
Inventors: 周荣; 欧阳林; 周骏
Original assignee: Ningbo Haiji Electric Appliance Co ltd
Current assignee: Ningbo Haiji Electric Appliance Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-28
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a rotary dust collector floor brush. The floor brush comprises a lower floor brush cover, an upper floor brush cover, a lower movable joint and an upper movable joint, wherein the upper floor brush cover is arranged on the lower floor brush cover, the lower movable joint is arranged between the upper floor brush cover and the lower floor brush cover, the lower movable joint is rotatably connected with the upper floor brush cover and the lower floor brush cover, the upper movable joint is arranged on the lower movable joint, a joint clamping ring is arranged between the upper movable joint and the lower movable joint, and the upper movable joint is rotatably connected with the lower movable joint through the joint clamping ring. The utility model has the beneficial effects that: the dust collector has the advantages that the vertical direction and radial upward direction adjustment can be realized between the dust collector host and the dust collector floor brush, the application range of the whole dust collector is greatly widened, the use requirements of different environments of different people are met, the dust collector is convenient to mount and dismount, and the dust collection effect is good.

Description

Rotary dust collector floor brush

Technical Field

The utility model relates to the technical field related to dust collectors, in particular to a rotary dust collector floor brush.

Background

The dust collector mainly comprises three parts of dust generation, dust collection and dust filtration, and generally comprises a series excitation commutator motor, a centrifugal fan, a dust filter (bag) and a dust collection accessory. The power of a typical vacuum cleaner is 400-1000W or more, and the power of a portable vacuum cleaner is 250W or less. The dust collector can remove dust and is mainly characterized in that an electric exhaust fan is arranged at the head of the dust collector. The rotating shaft of the exhaust fan is provided with an air impeller, after the air impeller is electrified, the exhaust fan can generate higher suction force and pressure at the rotating speed of 500 circles per second, air is discharged at high speed under the action of the suction force and the pressure, air in the dust suction part at the front end of the air fan continuously supplements the air in the air fan, instantaneous vacuum is generated inside the dust collector, negative pressure difference is formed between the air and the external atmospheric pressure, and air containing dust is sucked under the action of the negative pressure difference. The dust and other sundries sequentially pass through the carpet or the floor brush, the long connecting pipe, the bent pipe, the hose and the hose joint to enter the dust filtering bag, the dust and other sundries are retained in the dust filtering bag, and the air is purified by the filter disc and then is discharged from the tail part of the machine body.

When the existing handheld dust collector is used, the main structure of the handheld dust collector usually rotates in a single reverse direction by taking a dust collector floor brush as a center, the rotating range is also a sector-shaped range area, and the structural characteristic limits the application range of the main structure of the dust collector.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotary dust collector floor brush with wide application range in order to overcome the defects in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a rotary type dust catcher scrubbing brush, includes scrubbing brush lower cover, scrubbing brush upper cover, activity joint and last activity joint down, scrubbing brush upper cover install and cover under the scrubbing brush, lower activity joint install between scrubbing brush upper cover and scrubbing brush lower cover, lower activity joint and scrubbing brush upper cover and scrubbing brush lower cover rotate to be connected, last activity joint install under on the activity joint, last activity joint and activity joint down between be equipped with and connect the rand, last activity joint rotate with lower activity joint through connecting the rand and be connected.

When the floor brush is used, when the whole floor brush of the dust collector is placed on the ground, the lower movable joint is rotatably connected with the upper cover of the floor brush and the lower cover of the floor brush, so that the lower movable joint can rotate on the floor brush of the dust collector to adjust the angle between the floor brush of the dust collector and a host machine of the dust collector, and different use requirements are met; because the upper movable joint is rotationally connected with the lower movable joint through the joint retainer ring, 360-degree rotation can be realized between the lower movable joint and the upper movable joint, so that the dust collector main body can rotate on the dust collector floor brush by 360 degrees to meet different use requirements; to sum up, through the rotation connection of lower movable joint and scrubbing brush upper cover and scrubbing brush lower cover to and go up the movable joint and rotate with 360 degrees between the lower movable joint, make can realize orientation and radial ascending direction between dust catcher host computer and the dust catcher scrubbing brush and adjust, improved the application scope of whole dust catcher greatly, in order to satisfy the user demand of different crowds different environment.

Preferably, the shape of going up the activity and connecting is the pipe form, last activity connect be integrated into one piece, last activity connect and include top tube connection and low tube connection, top tube connection and low tube connection between be equipped with the contained angle, top tube connection and low tube connection communicate each other, low tube connection pass through and connect the rand and rotate with lower activity and connect and be connected. The angle between the dust collector floor brush and the dust collector host can be changed by designing the included angle between the upper pipe joint and the lower pipe joint so as to meet the use requirement of the dust collector host.

Preferably, the shape of lower movable joint is the T type, lower movable joint be integrated into one piece, lower movable joint include connector and lower connector, the shape of going up the connector is the pipe form, the shape of lower connector is cylindrically, lower connector pass through joint rand and last connector and rotate and be connected, last connector arrange the intermediate position department of lower connector in, the centre of lower connector is equipped with and connects the recess, connect recess and last connector intercommunication on the lower connector, lower connector install between scrubbing brush upper cover and scrubbing brush lower cover. Through the structural design of connector down, can make things convenient for movable joint's installation and dismantlement down.

Preferably, the lower pipe joint is sleeved on the outer side of the upper connector, a first annular groove matched with the joint clamping ring is formed in the outer side surface of the lower pipe joint, the joint clamping ring is installed in the first annular groove, a second annular groove is formed in the outer side surface of the upper connector, the first annular groove corresponds to the second annular groove, a first limiting block is arranged on the inner side of the joint clamping ring, and the first limiting block penetrates through the first annular groove and then is placed in the second annular groove. Through the design of the first annular groove, the second annular groove and the first limiting block, the first limiting block can rotate in the second annular groove, and therefore 360-degree rotation is achieved.

Preferably, the shape that connects the rand is the annular, it is equipped with two at least stoppers one on the inside wall of rand to connect, annular groove one in be equipped with two at least spacing hole one, stopper one and spacing hole one between be the one-to-one, annular groove one through spacing hole one and annular groove two intercommunication, stopper one pass spacing hole one and arrange annular groove two in. Through the design of the first limiting hole, the installation and the positioning of the joint clamping ring can be facilitated.

Preferably, the joint rand on be equipped with the opening, both sides all are equipped with stopper two about just arranging the open-ended on the inside wall of joint rand in, annular groove one in be equipped with two stopper two splice assorted spacing hole two together, stopper two pass in spacing hole two arranges annular groove two in, the open-ended left and right sides all is equipped with the fixing base on the lateral surface of joint rand and arrange in, fixing base and stopper two phase correspondences. Through the design of the opening, the joint clamping ring can be conveniently detached and installed; through the design of the second limiting block and the second limiting hole, the lower movable joint and the upper movable joint can be conveniently mounted and dismounted.

Preferably, the outer side surface of the lower connector is provided with a baffle groove, the baffle groove is internally provided with a floor brush baffle, the length of the floor brush baffle and the length of the baffle groove are consistent with the length of the lower connector, and the width of the floor brush baffle is smaller than the width of the baffle groove. Through the design of the baffle groove and the scrubbing brush baffle, the outer leakage of dust and scraps caused by the clearance between the lower movable joint and the upper cover of the scrubbing brush and the lower cover of the scrubbing brush when the lower movable joint rotates is prevented, and the dust collection effect can be further improved.

Preferably, the rear end of the upper cover of the floor brush is provided with an upper cover groove, the upper cover groove is matched with the lower connector, the edge where the upper cover groove is arranged on the upper cover of the floor brush is provided with a clamping seat, the clamping seat is provided with a clamping groove, the clamping groove faces the position where the upper cover groove is arranged, the lower end edge of the lower pipe connector is provided with a clamping head, and the clamping head is matched with the clamping groove. Through the design of cassette, draw-in groove and dop for the dust catcher host computer can the direct positioning brush on the dust catcher, makes to form 90 degrees angles between dust catcher host computer and the dust catcher ground brush, has made things convenient for the use of whole dust catcher.

Preferably, the lower extreme lateral surface of scrubbing brush separation blade is equipped with the blend stop, the scrubbing brush on cover and be equipped with the arc dog on arranging two inside walls of the left and right sides of upper cover recess in, be equipped with on the both ends lateral surface of lower connector with arc dog assorted ring channel, the blend stop on the scrubbing brush separation blade is arranged in between the lower extreme and the arc dog of draw-in groove. Through the structure and the position design of the barrier strip, the position of the whole floor brush blocking piece can be effectively limited, so that the barrier strip moves between the clamping groove and the arc-shaped stop block, and the barrier strip stops moving downwards when the barrier strip is arranged at the lowest end position of the clamping groove, so that a joint groove on the lower movable joint is ensured to have a large enough opening to improve the dust collection efficiency; when the barrier strip moves towards the position of the arc-shaped stop block, the barrier strip moves along with the action of the lower movable joint until the barrier strip contacts with the arc-shaped stop block to stop the action, and the barrier strip is used for closely brushing the space between the upper cover and the joint groove of the lower movable joint to prevent leakage in the dust collection process, so that the dust collection effect of the whole dust collector is ensured.

Preferably, the rear end of the lower cover of the floor brush is provided with a lower cover groove, the lower cover groove is matched with the lower connector, the lower cover of the floor brush is provided with big rollers arranged at the left side and the right side of the lower cover groove, the lower connector is arranged in the lower cover groove and connected with the big rollers, the front end of the lower cover of the floor brush is provided with a roller groove, small rollers are arranged in the roller groove, and the small rollers are in rolling connection with the lower cover of the floor brush through the roller groove. Through the design of the large idler wheel and the small idler wheel, the dust collector floor brush rolls instead of slides when in use, and the service life of the dust collector floor brush is prolonged.

Preferably, the front end of the lower cover of the floor brush is provided with a dust suction groove, the middle of the lower cover of the floor brush is provided with a dust suction channel, one end of the dust suction channel is communicated with the dust suction groove, and the other end of the dust suction channel is communicated with the joint groove on the lower connector. Through the design of the dust suction groove and the dust suction channel, the effect of the whole dust collector can be improved, and dust is prevented from remaining in the dust collector floor brush.

The utility model has the beneficial effects that: through the rotation connection of lower movable joint and scrubbing brush upper cover and scrubbing brush lower cover to and go up 360 degrees rotations between movable joint and the lower movable joint, make direction and radial ascending direction regulation about can realizing between dust catcher host computer and the dust catcher scrubbing brush, improved the application scope of whole dust catcher greatly, in order to satisfy the user demand of different crowds different environment, easy to assemble and dismantlement, dust collection effect is good.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a top view of FIG. 1;

fig. 4 is a schematic cross-sectional view at AA of fig. 3.

In the figure: 1. the floor brush comprises a lower floor brush cover, 2 parts of an upper floor brush cover, 3 parts of a lower movable joint, 4 parts of a joint clamping ring, 5 parts of an upper movable joint, 6 parts of an upper pipe joint, 7 parts of a first annular groove, 8 parts of a first limiting hole, 9 parts of a lower pipe joint, 10 parts of a clamping head, 11 parts of a fixed seat, 12 parts of an opening, 13 parts of a second limiting block, 14 parts of a first limiting block, 15 parts of a second annular groove, 16 parts of an upper connector, 17 parts of an annular groove, 18 parts of a baffle groove, 19 parts of a lower connector, 20 parts of a joint groove, 21 parts of a floor brush baffle, 22 parts of a baffle strip, 23 parts of an arc-shaped baffle block, 24 parts of an upper cover groove, 25 parts of a clamping seat, 26 parts of a large roller, 27 parts of a lower cover groove, 28 parts of a dust suction channel, 29 parts of a dust suction groove, 30 parts of a small roller, 31 parts of a clamping groove, 32 parts of a lower roller groove, and 33 parts of a second limiting hole.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

In the embodiment shown in fig. 1, 2 and 3, the rotary type dust collector floor brush comprises a lower floor brush cover 1, an upper floor brush cover 2, a lower movable joint 3 and an upper movable joint 5, wherein the upper floor brush cover 2 is arranged on the lower floor brush cover 1, the lower movable joint 3 is arranged between the upper floor brush cover 2 and the lower floor brush cover 1, the lower movable joint 3 is rotatably connected with the upper floor brush cover 2 and the lower floor brush cover 1, the upper movable joint 5 is arranged on the lower movable joint 3, a joint clamping ring 4 is arranged between the upper movable joint 5 and the lower movable joint 3, and the upper movable joint 5 is rotatably connected with the lower movable joint 3 through the joint clamping ring 4.

As shown in fig. 2 and 4, the upper movable joint 5 is in a circular tube shape, the upper movable joint 5 is integrally formed, the upper movable joint 5 includes an upper pipe joint 6 and a lower pipe joint 9, an included angle is formed between the upper pipe joint 6 and the lower pipe joint 9, the upper pipe joint 6 and the lower pipe joint 9 are communicated with each other, and the lower pipe joint 9 is rotatably connected with the lower movable joint 3 through a joint collar 4. The shape of lower movable joint 3 is the T type, lower movable joint 3 is integrated into one piece, lower movable joint 3 includes connector 16 and lower connector 19, the shape of last connector 16 is the pipe form, the shape of lower connector 19 is cylindrically, lower pipe joint 9 is connected with last connector 16 through connecting rand 4 and rotating, the intermediate position department of lower connector 19 is arranged in to last connector 16, the centre of lower connector 19 is equipped with joint recess 20, joint recess 20 and last connector 16 intercommunication on the lower connector 19, lower connector 19 is installed between scrubbing brush upper cover 2 and scrubbing brush lower cover 1.

As shown in fig. 2 and 4, the lower pipe joint 9 is sleeved outside the upper connector 16, a first annular groove 7 matched with the joint collar 4 is formed in the outer side surface of the lower pipe joint 9, the joint collar 4 is installed in the first annular groove 7, a second annular groove 15 is formed in the outer side surface of the upper connector 16, the first annular groove 7 corresponds to the second annular groove 15, a first limiting block 14 is arranged on the inner side of the joint collar 4, and the first limiting block 14 penetrates through the first annular groove 7 and then is placed in the second annular groove 15. The shape that connects rand 4 is the annular, is equipped with two at least stoppers 14 on the inside wall that connects rand 4, is equipped with two at least spacing holes 8 in the annular groove 7, is the one-to-one between stopper 14 and the spacing hole 8, and annular groove 7 communicates with annular groove two 15 through spacing hole 8, and stopper 14 passes spacing hole 8 and arranges annular groove two 15 in. Connect and be equipped with opening 12 on rand 4, connect on the inside wall of rand 4 and arrange opening 12 in about both sides all be equipped with stopper two 13, be equipped with in the annular groove one 7 with two stopper two 13 splices the spacing hole two 33 of assorted together, stopper two 13 passes spacing hole two 33 and arranges annular groove two 15 in, connect on the lateral surface of rand 4 and arrange opening 12 in about both sides all be equipped with fixing base 11, fixing base 11 is corresponding with stopper two 13.

As shown in fig. 2, the rear end of the upper cover 2 of the floor brush is provided with an upper cover groove 24, the upper cover groove 24 is matched with the lower connector 19, the edge of the upper cover 2 at which the upper cover groove 24 is arranged is provided with a clamping seat 25, the clamping seat 25 is provided with a clamping groove 31, the clamping groove 31 faces the position of the upper cover groove 24, the lower end edge of the lower pipe connector 9 is provided with a clamping head 10, and the clamping head 10 is matched with the clamping groove 31. The rear end of the lower cover 1 of the floor brush is provided with a lower cover groove 27, the lower cover groove 27 is matched with the lower connecting head 19, the large rollers 26 are arranged on the lower cover 1 and arranged at the left and right sides of the lower cover groove 27, the lower connecting head 19 is arranged in the lower cover groove 27 and connected with the large rollers 26, the front end of the lower cover 1 of the floor brush is provided with a roller groove 32, small rollers 30 are arranged in the roller groove 32, and the small rollers 30 are in rolling connection with the lower cover 1 of the floor brush through the roller groove 32. The front end of the lower cover 1 of the floor brush is provided with a dust suction groove 29, the middle of the lower cover 1 of the floor brush is provided with a dust suction channel 28, one end of the dust suction channel 28 is communicated with the dust suction groove 29, and the other end of the dust suction channel 28 is communicated with the joint groove 20 on the lower joint 19.

As shown in fig. 2 and 4, a stop piece groove 18 is formed on the outer side surface of the lower connecting head 19, a floor brush stop piece 21 is arranged in the stop piece groove 18, the length of the floor brush stop piece 21 and the length of the stop piece groove 18 are consistent with the length of the lower connecting head 19, and the width of the floor brush stop piece 21 is smaller than the width of the stop piece groove 18. The outer side face of the lower end of the ground brush retaining piece 21 is provided with a retaining strip 22, the upper cover 2 of the ground brush is provided with arc-shaped retaining blocks 23 on the left inner side wall and the right inner side wall of the upper cover groove 24, the outer side faces of the two ends of the lower connecting head 19 are provided with annular grooves 17 matched with the arc-shaped retaining blocks 23, and the retaining strip 22 on the ground brush retaining piece 21 is arranged between the lower end of the clamping groove 31 and the arc-shaped retaining blocks 23.

When the dust collector floor brush (1600 c) is used, firstly, a dust collector host is inserted on an upper pipe joint 6 of an upper movable joint 5, a lower pipe joint 9 of the upper movable joint 5 is sleeved on an upper connector 16 of a lower movable joint 3, a joint clamping ring 4 is installed in an annular groove I7 of the upper movable joint 5 through an opening 12, at the moment, a limiting block I14 in the joint clamping ring 4 penetrates through a limiting hole I8 and is arranged in an annular groove II 15 of the lower movable joint 3, a limiting block II 13 in the joint clamping ring 4 penetrates through a limiting hole II 33 and is arranged in an annular groove II 15 of the lower movable joint 3, and the upper movable joint 5 can rotate on the lower movable joint 3 by 360 degrees by taking the annular groove II 15 as an action track; and then the lower connector 19 of the lower movable connector 3 is arranged in the upper cover groove 24 of the upper cover 2 of the floor brush and the lower cover groove 27 of the lower cover 1 of the floor brush and is connected with the large roller 26, so that the lower connector 19 can rotate in the upper cover groove 24 and the lower cover groove 27 to change the included angle between the floor brush of the dust collector and the main machine of the dust collector, and the specific use requirement is met. Meanwhile, the large roller 26 and the small roller 30 are matched to realize the rolling motion of the dust collector floor brush, so that the abrasion of the dust collector floor brush is reduced; meanwhile, a limit groove is designed on the lower connector 19 of the lower movable connector 3, a floor brush baffle 21 in the limit groove is limited between the lower end of the clamping groove 31 and the arc-shaped stop block 23, when the included angle between the lower connecting head 19 and the upper cover 2 of the floor brush is minimum, the baffle 21 of the floor brush is limited at the lowest end of the clamping groove 31 and does not move downwards continuously, thereby ensuring a sufficiently large passage between the joint groove 20 and the dust suction passage 28 to enhance the dust suction effect, when the included angle between the lower connector 19 and the upper cover 2 of the floor brush is gradually increased, the floor brush baffle 21 is driven by the lower connector 19 to move towards the arc-shaped stop block 23, the connecting channel between the connector groove 20 and the dust collection channel 28 can be further increased, and the floor brush baffle 21 stops moving after being contacted with the arc-shaped stop block 23, so that the position of the floor brush baffle 21 can be effectively limited to ensure that no gap is formed between the lower movable connector 3 and the upper cover 2 of the floor brush to cause the leakage of dust; the joint groove 20 on the lower connector 19 is butted with the dust suction channel 28 on the lower cover 1 of the floor brush, so that dust sucked in the dust suction groove 29 can be effectively guided into the joint groove 20 through the dust suction channel 28, and the dust can be smoothly placed in the main machine of the dust collector through the lower movable connector 3 and the upper movable connector 5; in addition, when the main machine of the dust collector is used, the main machine of the dust collector needs to be clamped on the ground brush of the dust collector to enable the main machine of the dust collector to stand, and only the lower movable joint 3 needs to be rotated and the upper movable joint 5 needs to be rotated simultaneously, so that the clamping block on the upper movable joint 5 is clamped with the clamping groove 31 on the upper cover 2 of the ground brush.

Claims

1. The utility model provides a rotary type dust catcher scrubbing brush, characterized by, includes scrubbing brush lower cover (1), scrubbing brush upper cover (2), lower activity connects (3) and goes up movable joint (5), scrubbing brush upper cover (2) install on scrubbing brush lower cover (1), lower activity connect (3) install between scrubbing brush upper cover (2) and scrubbing brush lower cover (1), lower activity connect (3) and scrubbing brush upper cover (2) and scrubbing brush lower cover (1) rotate and be connected, last movable joint (5) install under on movable joint (3), last movable joint (5) and lower movable joint (3) between be equipped with and connect rand (4), last movable joint (5) rotate with lower movable joint (3) through connecting rand (4) and being connected.

2. A rotary vacuum cleaner floor brush according to claim 1, wherein the upper movable joint (5) is tubular, the upper movable joint (5) is integrally formed, the upper movable joint (5) comprises an upper pipe joint (6) and a lower pipe joint (9), an included angle is formed between the upper pipe joint (6) and the lower pipe joint (9), the upper pipe joint (6) and the lower pipe joint (9) are communicated with each other, and the lower pipe joint (9) is rotatably connected with the lower movable joint (3) through a joint collar (4).

3. A rotary vacuum cleaner floor brush as claimed in claim 2, wherein the lower movable joint (3) is T-shaped, the lower movable joint (3) is integrally formed, the lower movable joint (3) comprises an upper connector (16) and a lower connector (19), the upper connector (16) is in a shape of a circular tube, the lower connector (19) is in a shape of a cylinder, the lower pipe joint (9) is rotationally connected with the upper connector (16) through a joint clamping ring (4), the upper connector (16) is arranged at the middle position of the lower connector (19), the middle of the lower connector (19) is provided with a connector groove (20), the connector groove (20) on the lower connector (19) is communicated with the upper connector (16), the lower connecting head (19) is arranged between the upper cover (2) of the floor brush and the lower cover (1) of the floor brush.

4. The rotary type vacuum cleaner floor brush according to claim 3, wherein the lower pipe joint (9) is sleeved outside the upper connector (16), a first annular groove (7) matched with the joint collar (4) is arranged on the outer side surface of the lower pipe joint (9), the joint collar (4) is installed in the first annular groove (7), a second annular groove (15) is arranged on the outer side surface of the upper connector (16), the first annular groove (7) corresponds to the second annular groove (15), a first limit block (14) is arranged on the inner side of the joint collar (4), and the first limit block (14) penetrates through the first annular groove (7) and then is arranged in the second annular groove (15).

5. A rotary vacuum cleaner floor brush as claimed in claim 4, wherein said joint collar (4) is annular in shape, said joint collar (4) has at least two first stoppers (14) on its inner sidewall, said first annular groove (7) has at least two first limiting holes (8) therein, said first stoppers (14) and said first limiting holes (8) are in one-to-one correspondence, said first annular groove (7) is communicated with said second annular groove (15) through said first limiting holes (8), and said first stoppers (14) are disposed in said second annular groove (15) through said first limiting holes (8).

6. A rotary vacuum cleaner floor brush as claimed in claim 4 or 5, wherein the joint collar (4) is provided with an opening (12), the inner side wall of the joint collar (4) is provided with a second limiting block (13) on the left and right sides of the opening (12), the first annular groove (7) is provided with a second limiting hole (33) matching with the two second limiting blocks (13) in a splicing manner, the second limiting block (13) penetrates the second limiting hole (33) and is arranged in the second annular groove (15), the outer side surface of the joint collar (4) is provided with a fixing seat (11) on the left and right sides of the opening (12), and the fixing seat (11) corresponds to the second limiting block (13).

7. A rotary vacuum cleaner floor brush according to claim 3, wherein a stop slot (18) is provided on the outer side of the lower connecting head (19), a floor brush stop (21) is provided in the stop slot (18), the length of the floor brush stop (21) and the length of the stop slot (18) are the same as the length of the lower connecting head (19), and the width of the floor brush stop (21) is smaller than the width of the stop slot (18).

8. A rotary vacuum cleaner floor brush according to claim 7, characterized in that the rear end of the upper cover (2) of the floor brush is provided with an upper cover groove (24), the upper cover groove (24) is matched with the lower connector (19), the upper cover (2) of the floor brush is provided with a clamping seat (25) at the edge where the upper cover groove (24) is located, the clamping seat (25) is provided with a clamping groove (31), the clamping groove (31) faces the position where the upper cover groove (24) is located, the lower end edge of the lower pipe connector (9) is provided with a clamping head (10), and the clamping head (10) is matched with the clamping groove (31).

9. A rotary vacuum cleaner floor brush according to claim 8, wherein a barrier strip (22) is arranged on the outer side surface of the lower end of the floor brush retaining sheet (21), an arc-shaped stop block (23) is arranged on the upper cover (2) and on the inner side walls of the left and right sides of the upper cover groove (24), an annular groove (17) matched with the arc-shaped stop block (23) is arranged on the outer side surface of the two ends of the lower connecting head (19), and the barrier strip (22) on the floor brush retaining sheet (21) is arranged between the lower end of the clamping groove (31) and the arc-shaped stop block (23).

10. A rotary vacuum cleaner floor brush according to claim 3, wherein the rear end of the lower cover (1) is provided with a lower cover groove (27), the lower cover groove (27) is matched with the lower connector (19), the lower cover (1) is provided with a large roller (26) arranged on the left and right sides of the lower cover groove (27), the lower connector (19) is arranged in the lower cover groove (27) and connected with the large roller (26), the front end of the lower cover (1) is provided with a roller groove (32), the roller groove (32) is provided with a small roller (30), and the small roller (30) is connected with the lower cover (1) through the roller groove (32) in a rolling manner.

11. A rotary vacuum cleaner floor brush according to claim 10, wherein the front end of the lower cover (1) is provided with a dust suction groove (29), the middle of the lower cover (1) is provided with a dust suction channel (28), one end of the dust suction channel (28) is communicated with the dust suction groove (29), and the other end of the dust suction channel (28) is communicated with the joint groove (20) of the lower joint (19).