A rotary vacuum cleaner floor brush structure

Abstract

The present invention discloses a rotary vacuum cleaner floor brush structure. It includes a floor brush lower cover, a floor brush upper cover, a lower movable joint and an upper movable joint. The floor brush upper cover is installed on the floor brush lower cover, the lower movable joint is installed between the floor brush upper cover and the floor brush lower cover, the lower movable joint is rotatably connected with the floor brush upper cover and the floor brush lower cover, the upper movable joint is installed on the lower movable joint, a joint clamping ring is provided 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 beneficial effects of the present invention are: the vacuum cleaner main unit and the vacuum cleaner floor brush can be adjusted in the up and down directions and in the radial direction, which greatly improves the application range of the entire vacuum cleaner to meet the use needs of different people in different environments, is convenient for installation and disassembly, and has a good vacuuming effect.

Description

Technical Field

[0001] The present invention relates to the technical field related to vacuum cleaners, and in particular to a rotary vacuum cleaner floor brush structure. Background Art

[0002] The vacuum cleaner is mainly composed of three parts: dust collection, dust collection, and dust filtration. It generally includes a series commutator motor, a centrifugal fan, a dust filter (bag), and dust collection accessories. The power of a general vacuum cleaner is 400-1000W or higher, and the power of a portable vacuum cleaner is generally 250W or less. The vacuum cleaner can remove dust mainly because its "head" is equipped with an electric exhaust fan. There is a wind impeller on the rotating shaft of the exhaust fan. After power is turned on, the exhaust fan will generate a high suction and pressure at a speed of 500 revolutions per second. Under the action of suction and pressure, the air is discharged at a high speed, and the air in the dust collection part at the front end of the fan continuously replenishes the air in the fan, causing an instantaneous vacuum inside the vacuum cleaner, forming a negative pressure difference with the external atmospheric pressure. Under the action of this pressure difference, dust-containing air is inhaled. Dust and other debris enter the dust filter bag through the carpet or floor brush, long pipe, elbow, hose, and hose connector in turn. Dust and other debris are retained in the dust filter bag. After the air is purified by the filter, it is discharged from the tail of the machine body.

[0003] During use, the main structure of an existing handheld vacuum cleaner often rotates upward in a single reverse direction with the vacuum cleaner brush as the center, and the range of rotation is a fan-shaped range area. Such structural features limit the application range of the main structure of the vacuum cleaner. Summary of the invention

[0004] The present invention aims to overcome the above-mentioned deficiencies in the prior art and provides a rotary vacuum cleaner floor brush structure with a wide range of applications.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A rotary vacuum cleaner floor brush structure comprises a floor brush lower cover, a floor brush upper cover, a lower movable joint and an upper movable joint, wherein the floor brush upper cover is mounted on the floor brush lower cover, the lower movable joint is mounted between the floor brush upper cover and the floor brush lower cover, the lower movable joint is rotatably connected to the floor brush upper cover and the floor brush lower cover, the upper movable joint is mounted on the lower movable joint, a joint clamping ring is provided between the upper movable joint and the lower movable joint, and the upper movable joint is rotatably connected to the lower movable joint via the joint clamping ring.

[0007] During use, when the entire vacuum cleaner floor brush is placed on the ground, since the lower movable joint is rotatably connected to the floor brush upper cover and the floor brush lower cover, the lower movable joint can be rotated on the vacuum cleaner floor brush to adjust the angle between the vacuum cleaner floor brush and the vacuum cleaner main body to meet different usage requirements; since the upper movable joint is rotatably connected to the lower movable joint through the joint clamping ring, the lower movable joint and the upper movable joint can achieve 360-degree rotation, so that the vacuum cleaner main body can rotate 360 ​​degrees on the vacuum cleaner floor brush to meet different usage requirements; in summary, through the rotatable connection of the lower movable joint with the floor brush upper cover and the floor brush lower cover, and the 360-degree rotation between the upper movable joint and the lower movable joint, the vacuum cleaner main body and the vacuum cleaner floor brush can be adjusted in the up and down directions and radial directions, which greatly improves the applicability of the entire vacuum cleaner to meet the usage requirements of different people in different environments.

[0008] Preferably, the upper movable joint is in the shape of a circular tube, is integrally formed, comprises an upper pipe joint and a lower pipe joint, an angle is provided between the upper pipe joint and the lower pipe joint, the upper pipe joint and the lower pipe joint are interconnected, and the lower pipe joint is rotatably connected to the lower movable joint via a joint clamp. The angle between the upper pipe joint and the lower pipe joint can be changed to meet the use requirements of the vacuum cleaner main unit by designing the angle between the upper pipe joint and the lower pipe joint.

[0009] Preferably, the lower movable joint is in a T-shape, is integrally formed, comprises an upper connector and a lower connector, the upper connector is in a round tube shape, the lower connector is in a cylindrical shape, the lower pipe joint is rotatably connected to the upper connector via a connector collar, the upper connector is placed in the middle of the lower connector, a connector groove is provided in the middle of the lower connector, the connector groove on the lower connector is connected to the upper connector, and the lower connector is installed between the floor brush upper cover and the floor brush lower cover. The structural design of the lower connector facilitates the installation and removal of the lower movable joint.

[0010] Preferably, the lower pipe joint is sleeved on the outer side of the upper connector, an annular groove 1 matching the connector collar is provided on the outer side of the lower pipe joint, the connector collar is installed in the annular groove 1, an annular groove 2 is provided on the outer side of the upper connector, the annular groove 1 corresponds to the annular groove 2, a limiting block 1 is provided on the inner side of the connector collar, the limiting block 1 passes through the annular groove 1 and is placed in the annular groove 2. Through the design of the annular groove 1, the annular groove 2 and the limiting block 1, the limiting block 1 can be rotated in the annular groove 2 to achieve a 360-degree rotation.

[0011] Preferably, the joint collar is annular in shape, at least two limiting blocks 1 are provided on the inner side wall of the joint collar, at least two limiting holes 1 are provided in the annular groove 1, the limiting blocks 1 and the limiting holes 1 are in one-to-one correspondence, the annular groove 1 is connected to the annular groove 2 through the limiting hole 1, and the limiting block 1 passes through the limiting hole 1 and is placed in the annular groove 2. The design of the limiting hole 1 can facilitate the installation and positioning of the joint collar.

[0012] Preferably, the joint collar is provided with an opening, and two limit blocks are provided on the inner side wall of the joint collar and on the left and right sides of the opening, and two limit holes are provided in the annular groove one to match the two limit blocks spliced ​​together, and the limit block two passes through the limit hole two and is placed in the annular groove two, and a fixing seat is provided on the outer side of the joint collar and on the left and right sides of the opening, and the fixing seat corresponds to the limit block two. The design of the opening can facilitate the disassembly and installation of the joint collar; the design of the limit block two and the limit hole two can facilitate the installation and disassembly of the lower movable joint and the upper movable joint.

[0013] Preferably, a baffle groove is provided on the outer side of the lower connector, a floor brush baffle is provided in the baffle groove, 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. The design of the baffle groove and the floor brush baffle prevents dust from leaking out due to a gap between the lower movable joint and the floor brush upper cover and the floor brush lower cover when the lower movable joint rotates, thereby further improving the dust collection effect.

[0014] Preferably, the rear end of the floor brush upper cover is provided with an upper cover groove, the upper cover groove matches the lower connector, a holder is provided on the floor brush upper cover and at the edge where the upper cover groove is located, the holder is provided with a slot, the slot faces the position where the upper cover groove is located, and a clamp is provided at the lower end edge of the lower pipe joint, the clamp matches the slot. Through the design of the holder, slot and clamp, the vacuum cleaner mainframe can be directly positioned on the vacuum cleaner floor brush, so that a 90-degree angle is formed between the vacuum cleaner mainframe and the vacuum cleaner floor brush, which facilitates the use of the entire vacuum cleaner.

[0015] Preferably, a baffle is provided on the outer side surface of the lower end of the floor brush baffle, an arc-shaped baffle is provided on the left and right inner side walls of the floor brush upper cover and placed in the groove of the upper cover, an annular groove matching the arc-shaped baffle is provided on the outer side surfaces of both ends of the lower connecting head, and the baffle on the floor brush baffle is placed between the lower end of the slot and the arc-shaped baffle. Through the structure and position design of the baffle, the position of the entire floor brush baffle can be effectively limited, so that the baffle moves between the slot and the arc-shaped baffle, and when the baffle is placed at the lower end of the slot, the baffle stops moving downward, ensuring that the joint groove on the lower movable joint has a sufficiently large opening to improve the dust collection efficiency; and when the baffle moves to the position of the arc-shaped baffle, the baffle moves with the movement of the lower movable joint until it contacts the arc-shaped baffle and stops moving, which is used to close the space between the floor brush upper cover and the joint groove of the lower movable joint to prevent leakage during the dust collection process. This design ensures the dust collection effect of the entire vacuum cleaner.

[0016] Preferably, the rear end of the floor brush lower cover is provided with a lower cover groove, the lower cover groove matches the lower connector, large rollers are provided on the floor brush lower cover and on the left and right sides of the lower cover groove, the lower connector is installed in the lower cover groove and connected to the large rollers, the front end of the floor brush lower cover is provided with a roller groove, a small roller is provided in the roller groove, and the small roller is connected to the floor brush lower cover in a rolling manner through the roller groove. Through the design of the large roller and the small roller, the vacuum cleaner floor brush rolls instead of sliding when in use, thereby increasing the service life of the vacuum cleaner floor brush.

[0017] Preferably, a dust suction groove is provided at the front end of the floor brush lower cover, a dust suction channel is provided in the middle of the floor brush lower cover, one end of the dust suction channel is connected to the dust suction groove, and the other end of the dust suction channel is connected to the connector groove on the lower connector. The design of the dust suction groove and the dust suction channel can improve the effect of the entire vacuum cleaner and prevent dust from remaining in the floor brush of the vacuum cleaner.

[0018] The beneficial effects of the present invention are: through the rotational connection between the lower movable joint and the floor brush upper cover and the floor brush lower cover, and the 360-degree rotation between the upper movable joint and the lower movable joint, the vertical and radial directions of the vacuum cleaner main body and the vacuum cleaner floor brush can be adjusted, which greatly improves the application range of the entire vacuum cleaner to meet the usage needs of different people in different environments, is convenient for installation and disassembly, and has a good vacuuming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the explosion structure;

[0021] Figure 3 yes Figure 1 A top view of

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0023] In the figure: 1. Floor brush lower cover, 2. Floor brush upper cover, 3. Lower movable joint, 4. Joint clamp ring, 5. Upper movable joint, 6. Upper pipe joint, 7. Annular groove 1, 8. Limit hole 1, 9. Lower pipe joint, 10. Clamp, 11. Fixed seat, 12. Opening, 13. Limit block 2, 14. Limit block 1, 15. Annular groove 2, 16. Upper connector, 17. Annular groove, 18. Baffle groove, 19. Lower connector, 20. Joint groove, 21. Floor brush baffle, 22. Baffle bar, 23. Arc block, 24. Upper cover groove, 25. Clamp seat, 26. Large roller, 27. Lower cover groove, 28. Dust suction channel, 29. Dust suction groove, 30. Small roller, 31. Clamp, 32. Roller groove, 33. Limit hole 2. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 , Figure 3 In the described embodiment, a rotary vacuum cleaner floor brush structure includes a floor brush lower cover 1, a floor brush upper cover 2, a lower movable joint 3 and an upper movable joint 5, the floor brush upper cover 2 is installed on the floor brush lower cover 1, the lower movable joint 3 is installed between the floor brush upper cover 2 and the floor brush lower cover 1, the lower movable joint 3 is rotatably connected to the floor brush upper cover 2 and the floor brush lower cover 1, the upper movable joint 5 is installed on the lower movable joint 3, a joint clamping ring 4 is provided between the upper movable joint 5 and the lower movable joint 3, and the upper movable joint 5 is rotatably connected to the lower movable joint 3 through the joint clamping ring 4.

[0026] like Figure 2 , Figure 4As shown, the upper movable joint 5 is in the shape of a circular tube, and 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 angle is set between the upper pipe joint 6 and the lower pipe joint 9. The upper pipe joint 6 and the lower pipe joint 9 are connected to each other. The lower pipe joint 9 is rotatably connected to the lower movable joint 3 through a joint collar 4. The lower movable joint 3 is in the shape of a T-shape, and the lower movable joint 3 is integrally formed. The lower movable joint 3 includes an upper connector 16 and a lower connector 19. The upper connector 16 is in the shape of a circular tube, and the lower connector 19 is in the shape of a cylinder. The lower pipe joint 9 is rotatably connected to the upper connector 16 through a joint collar 4. The upper connector 16 is placed in the middle of the lower connector 19. A joint groove 20 is set in the middle of the lower connector 19. The joint groove 20 on the lower connector 19 is connected to the upper connector 16. The lower connector 19 is installed between the floor brush upper cover 2 and the floor brush lower cover 1.

[0027] like Figure 2 , Figure 4 As shown, the lower pipe joint 9 is sleeved on the outer side of the upper connector 16, and an annular groove 17 matching the joint collar 4 is provided on the outer side surface of the lower pipe joint 9, and the joint collar 4 is installed in the annular groove 17. An annular groove 2 15 is provided on the outer side surface of the upper connector 16, and the annular groove 17 corresponds to the annular groove 2 15. A limit block 14 is provided on the inner side of the joint collar 4, and the limit block 14 passes through the annular groove 17 and is placed in the annular groove 2 15. The shape of the joint collar 4 is annular, and at least two limit blocks 14 are provided on the inner side wall of the joint collar 4, and at least two limit holes 18 are provided in the annular groove 17, and the limit blocks 14 and the limit holes 18 are in one-to-one correspondence, and the annular groove 17 is connected with the annular groove 2 15 through the limit hole 18, and the limit block 14 passes through the limit hole 18 and is placed in the annular groove 2 15. An opening 12 is provided on the joint clamp ring 4, and a second limit block 13 is provided on the inner wall of the joint clamp ring 4 and is placed on the left and right sides of the opening 12. A second limit hole 33 matching the two limit blocks 13 spliced ​​together is provided in the annular groove 7. The second limit block 13 passes through the second limit hole 33 and is placed in the annular groove 15. A fixing seat 11 is provided on the outer surface of the joint clamp ring 4 and is placed on the left and right sides of the opening 12, and the fixing seat 11 corresponds to the second limit block 13.

[0028] like Figure 2As shown, the rear end of the floor brush upper cover 2 is provided with an upper cover groove 24, which matches the lower connector 19. A holder 25 is provided on the floor brush upper cover 2 and is placed at the edge where the upper cover groove 24 is located. A holder 25 is provided with a slot 31, which faces the position where the upper cover groove 24 is located. A clamping head 10 is provided at the lower end edge of the lower pipe joint 9, which matches the slot 31. A lower cover groove 27 is provided at the rear end of the floor brush lower cover 1, which matches the lower connector 19. Large rollers 26 are provided on the floor brush lower cover 1 and are placed on the left and right sides of the lower cover groove 27. The lower connector 19 is installed in the lower cover groove 27 and connected to the large roller 26. A roller groove 32 is provided at the front end of the floor brush lower cover 1, and a small roller 30 is provided in the roller groove 32. The small roller 30 is rollingly connected to the floor brush lower cover 1 through the roller groove 32. A dust suction groove 29 is provided at the front end of the floor brush lower cover 1 , and a dust suction channel 28 is provided in the middle of the floor brush lower cover 1 . One end of the dust suction channel 28 is connected to the dust suction groove 29 , and the other end of the dust suction channel 28 is connected to the joint groove 20 on the lower connector 19 .

[0029] like Figure 2 , Figure 4 As shown, a baffle groove 18 is provided on the outer side of the lower connector 19, and a floor brush baffle 21 is provided in the baffle groove 18. The length of the floor brush baffle 21 and the length of the baffle groove 18 are consistent with the length of the lower connector 19, and the width of the floor brush baffle 21 is smaller than the width of the baffle groove 18. A baffle strip 22 is provided on the outer side of the lower end of the floor brush baffle 21, and arc-shaped baffles 23 are provided on the left and right inner walls of the floor brush upper cover 2 and placed on the upper cover groove 24. Annular grooves 17 matching the arc-shaped baffles 23 are provided on the outer sides of both ends of the lower connector 19, and the baffle strip 22 on the floor brush baffle 21 is placed between the lower end of the slot 31 and the arc-shaped baffle 23.

[0030] When using the vacuum cleaner floor brush (1600c), firstly, the vacuum cleaner main unit is plugged into the upper pipe joint 6 of the upper movable joint 5, and the lower pipe joint 9 of the upper movable joint 5 is sleeved on the upper connector 16 of the lower movable joint 3, and the joint clamp ring 4 is installed in the annular groove 17 of the upper movable joint 5 through the opening 12. At this time, the limit block 14 in the joint clamp ring 4 passes through the limit hole 18 and is placed in the annular groove 2 15 of the lower movable joint 3, and the limit block 2 13 in the joint clamp ring 4 passes through the limit hole 2 33 and is placed in the lower movable joint 3. The annular groove 215 of the movable joint 3 enables the upper movable joint 5 to realize a 360-degree rotation on the lower movable joint 3 with the annular groove 215 as the movement trajectory; then the lower connecting head 19 of the lower movable joint 3 is installed in the upper cover groove 24 of the floor brush upper cover 2 and the lower cover groove 27 of the floor brush lower cover 1, and is connected to the large roller 26 at the same time, so that the lower connecting head 19 can rotate in the upper cover groove 24 and the lower cover groove 27 to change the angle between the vacuum cleaner floor brush and the vacuum cleaner main unit to meet specific usage requirements. At the same time, the cooperation of the large roller 26 and the small roller 30 realizes the rolling movement of the vacuum cleaner floor brush, reducing the wear of the vacuum cleaner floor brush; at the same time, a limiting groove is designed on the lower connecting head 19 of the lower movable joint 3, and the floor brush baffle 21 in the limiting groove is limited between the lower end of the slot 31 and the arc-shaped block 23. When the angle between the lower connecting head 19 and the floor brush upper cover 2 is the smallest, the floor brush baffle 21 is limited at the lowest end of the slot 31 and will not continue to move downward, thereby ensuring that there is a sufficiently large channel between the joint groove 20 and the dust suction channel 28 to improve the dust suction effect. When the angle between the lower connecting head 19 and the floor brush upper cover 2 gradually increases, the floor brush baffle 21 is driven by the lower connecting head 19 to move in the direction of the arc-shaped block 23, which can further increase the connection channel between the joint groove 20 and the dust suction channel 28. , until the floor brush baffle 21 stops moving after contacting the arc-shaped baffle 23, which can effectively limit the position of the floor brush baffle 21 to ensure that there is no gap between the lower movable joint 3 and the floor brush upper cover 2 to cause dust to leak out; and the joint groove 20 on the lower connecting head 19 is connected with the dust suction channel 28 on the floor brush lower cover 1, which can effectively guide the dust sucked in the dust suction groove 29 into the joint groove 20 through the dust suction channel 28, so that it can be smoothly placed in the vacuum cleaner host through the lower movable joint 3 and the upper movable joint 5; in addition, when using the vacuum cleaner host, it is necessary to clamp the vacuum cleaner host on the vacuum cleaner floor brush so that the vacuum cleaner host can "stand". It is only necessary to rotate the lower movable joint 3 and the upper movable joint 5 at the same time, so that the block on the upper movable joint 5 is clamped with the groove 31 on the floor brush upper cover 2.

Claims

1. A rotary vacuum cleaner floor brush structure, Its characteristics are: The utility model comprises a floor brush lower cover (1), a floor brush upper cover (2), a lower movable joint (3) and an upper movable joint (5), wherein the floor brush upper cover (2) is mounted on the floor brush lower cover (1), the lower movable joint (3) is mounted between the floor brush upper cover (2) and the floor brush lower cover (1), the lower movable joint (3) is rotatably connected with the floor brush upper cover (2) and the floor brush lower cover (1), the upper movable joint (5) is mounted on the lower movable joint (3), a joint clamping ring (4) is provided between the upper movable joint (5) and the lower movable joint (3), the upper movable joint (5) is rotatably connected with the lower movable joint (3) via the joint clamping ring (4), the upper movable joint (5) is in the shape of a circular tube, the upper movable joint (5) is integrally formed, and the The upper movable joint (5) comprises an upper pipe joint (6) and a lower pipe joint (9), an angle is provided between the upper pipe joint (6) and the lower pipe joint (9), the upper pipe joint (6) and the lower pipe joint (9) are connected to each other, the lower pipe joint (9) is rotatably connected to the lower movable joint (3) via a joint clamp (4), the lower movable joint (3) is in a T-shaped shape, the lower movable joint (3) is integrally formed, the lower movable joint (3) comprises an upper connecting head (16) and a lower connecting head (19), the upper connecting head (16) is in a round tube shape, the lower connecting head (19) is in a cylindrical shape, the lower pipe joint (9) is rotatably connected to the upper connecting head (16) via a joint clamp (4), the upper connecting head (16) is placed at the middle position of the lower connecting head (19), a joint groove (20) is provided in the middle of the lower connecting head (19), the joint groove (20) on the lower connecting head (19) is connected to the upper connecting head (16), the lower connecting head (19) is installed between the floor brush upper cover (2) and the floor brush lower cover (1), a baffle groove (18) is provided on the outer surface of the lower connecting head (19), a floor brush baffle (21) is provided in the baffle groove (18), the length of the floor brush baffle (21) and the length of the baffle groove (18) are consistent with the length of the lower connecting head (19), the width of the floor brush baffle (21) is smaller than the width of the baffle groove (18), the rear end of the floor brush upper cover (2) is provided with an upper cover groove (24), the upper cover The groove (24) matches the lower connector (19); a holder (25) is provided on the floor brush upper cover (2) and is located at the edge where the groove (24) of the upper cover is located; a holder (25) is provided with a slot (31) and the slot (31) faces the position where the groove (24) of the upper cover is located; a holder (10) is provided at the lower end edge of the lower pipe joint (9) and the holder (10) matches the slot (31); a retaining strip (22) is provided on the lower end outer surface of the floor brush retaining piece (21); an arc-shaped retaining block (23) is provided on the left and right inner side walls of the floor brush upper cover (2) and is located at the groove (24) of the upper cover; and an annular groove (17) matching the arc-shaped retaining block (23) is provided on the outer sides of both ends of the lower connector (19);The blocking strip (22) on the floor brush blocking piece (21) is placed between the lower end of the slot (31) and the arc-shaped blocking block (23).

2. A rotary vacuum cleaner floor brush structure according to claim 1, Its characteristics are: The lower pipe joint (9) is sleeved on the outer side of the upper connecting head (16); an annular groove (7) matching the joint clamp (4) is provided on the outer side surface of the lower pipe joint (9); the joint clamp (4) is installed in the annular groove (7); an annular groove (15) is provided on the outer side surface of the upper connecting head (16); the annular groove (7) corresponds to the annular groove (15); a limit block (14) is provided on the inner side of the joint clamp (4); the limit block (14) passes through the annular groove (7) and is placed in the annular groove (15).

3. A rotary vacuum cleaner floor brush structure according to claim 2, Its characteristics are: The joint clamp (4) is annular in shape, and at least two limiting blocks (14) are provided on the inner side wall of the joint clamp (4). At least two limiting holes (8) are provided in the annular groove (7). There is a one-to-one correspondence between the limiting blocks (14) and the limiting holes (8). The annular groove (7) is connected to the annular groove (15) through the limiting holes (8), and the limiting blocks (14) pass through the limiting holes (8) and are placed in the annular groove (15).

4. A rotary vacuum cleaner floor brush structure according to claim 2 or 3, Its characteristics are: The joint clamp (4) is provided with an opening (12), and two limit blocks (13) are provided on the inner side wall of the joint clamp (4) and are located on the left and right sides of the opening (12). The annular groove (7) is provided with a second limit hole (33) that matches the two limit blocks (13) spliced ​​together, and the second limit block (13) passes through the second limit hole (33) and is placed in the annular groove (15). The outer surface of the joint clamp (4) and is located on the left and right sides of the opening (12) is provided with a fixing seat (11), and the fixing seat (11) corresponds to the second limit block (13).

5. A rotary vacuum cleaner floor brush structure according to claim 1, Its characteristics are: The rear end of the floor brush lower cover (1) is provided with a lower cover groove (27), the lower cover groove (27) matches the lower connecting head (19), large rollers (26) are provided on the floor brush lower cover (1) and are placed on the left and right sides of the lower cover groove (27), the lower connecting head (19) is installed in the lower cover groove (27) and connected to the large roller (26), the front end of the floor brush lower cover (1) is provided with a roller groove (32), a small roller (30) is provided in the roller groove (32), and the small roller (30) is rollingly connected to the floor brush lower cover (1) through the roller groove (32).

6. A rotary vacuum cleaner floor brush structure according to claim 5, Its characteristics are: A dust suction groove (29) is provided at the front end of the floor brush lower cover (1), and a dust suction channel (28) is provided in the middle of the floor brush lower cover (1); one end of the dust suction channel (28) is connected to the dust suction groove (29), and the other end of the dust suction channel (28) is connected to the connector groove (20) on the lower connector (19).

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