A dust extractor air duct structure

Abstract

The utility model discloses a dust catcher air duct structure, including the tubular main part of mutual sleeve joint, the movable pipe, the movable pipe includes end cover, lock cap, pipe body, filter piece, and the sleeve joint lock cap is on the pipe body, the lock cap is connected with the main part end portion to make the pipe body with the main part fixed, and the pipe body end portion is connected with the end cover, and the end cover and pipe body end face cooperation clamping filter piece, the structure of the movable pipe is improved in this scheme, and the end cover cooperation pipe body end portion clamping fixed filter piece can remove the end cover to facilitate cleaning or replace filter piece, and the pipe body is fixed with the main part end portion through the nut, and the convenient assembly is provided.

Description

Technical Field

[0001] This utility model relates to the field of air duct device technology, specifically to an air duct structure for a vacuum cleaner. Background Technology

[0002] Duct structures are typically two-pipe sleeved designs, with inner and outer pipes sleeved together and a sound-absorbing layer installed in the cavity between them to reduce noise. To minimize damage to the internal structure of the duct from debris, some companies install filters in the end cavity of the inner pipe to filter the flowing air. However, the filters are inconvenient to remove and require improvement. Utility Model Content

[0003] To address at least one of the aforementioned technical deficiencies, this utility model provides the following technical solution:

[0004] This application discloses a vacuum cleaner duct structure, including a cylindrical main body and a movable tube that are fitted together. The movable tube includes an end cap, a locking cap, a tube body, and a filter element. The locking cap is fitted onto the tube body and is connected to the end of the main body to fix the tube body to the main body. The end cap is connected to the end of the tube body and clamps the filter element by cooperating with the end face of the tube body. A through hole corresponding to the tube opening is provided in the middle of the end cap so that the filter element can filter the gas flowing into the tube body cavity from the through hole.

[0005] This design improves the structure of the movable tube. The end caps are used to clamp and fix the filter element at the end of the tube body. The end caps can be removed to facilitate cleaning or replacement of the filter element. The tube body is fixed to the end of the main body with nuts for easy assembly.

[0006] Furthermore, the end cap is in the shape of a groove, and the groove wall of the end cap is threadedly engaged with the peripheral wall of the end of the tube. The threaded connection structure facilitates installation and disassembly.

[0007] Furthermore, a shoulder is provided on the peripheral wall of the tube body, the diameter of the tail end cavity of the locking cap is greater than or equal to the diameter of the shoulder, the diameter of the head end cavity of the locking cap is less than the diameter of the shoulder, the locking cap is threaded to the peripheral wall of the end of the main tube, and the locking cap cooperates with the end of the main body to clamp and fix the shoulder, thereby fixing the tube body to the main body.

[0008] Furthermore, a groove is provided on the peripheral wall of the tube in front of the first shoulder, and a protrusion is slidably connected to the groove. The depth of the groove is greater than the length of the protrusion. An elastic layer is provided on the side of the protrusion that abuts against the groove wall. In normal use, if the protrusion abuts against the end of the main body, the locking cap cooperates with the end of the main body to clamp the protrusion. Alternatively, the protrusion can be pressed into the groove, and then the locking cap cooperates with the end of the main body to clamp the first shoulder. This structure can adjust the length of the movable tube extending from the main body, making it convenient to install on different models of vacuum cleaners.

[0009] Furthermore, a sound-absorbing layer is provided on the cavity wall of the main body, and the tube body is located in the annular opening formed by the sound-absorbing layer to reduce noise.

[0010] Furthermore, the diameter of the openings at the beginning and end of the main body is consistent with the outer diameter of the tube to support the tube and improve the stability of the structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model improves the structure of the movable tube, making it easy to connect and disassemble with the main body. The structure of the end cap and tube body clamping the filter element makes it easy to replace or clean the filter element, making it convenient to use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the air duct in Example 1;

[0015] The attached figures are labeled as follows:

[0016] 1. Main body; 2. Movable tube; 3. Sound-absorbing layer; 4. Base; 5. Bolt; 21. Tube body; 22. End cap; 23. Filter element; 24. Through hole; 25. Groove; 26. Shoulder 1; 27. Protrusion; 28. Lock cap. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] like Figure 1 As shown, in this example, a vacuum cleaner duct structure includes a cylindrical body 1 and a movable tube 2. The movable tube 2 includes an end cap 22, a locking cap 28, a tube body 21, and a filter element 23. The locking cap 28 is fitted onto the cylindrical tube body 21 and the two are rotatably engaged. A shoulder 26 is formed radially outward on the peripheral wall of the tube body 21. The diameter of the end cavity of the locking cap 28 is greater than or equal to the diameter of the shoulder 26, and the diameter of the beginning cavity of the locking cap 28 is smaller than the diameter of the shoulder 26. A threaded surface is formed on the inner wall of the end cavity of the locking cap 28. A corresponding threaded surface is formed on the peripheral wall of the tube end of the main body 1. In use, if the locking cap is screwed into the threaded connection with the peripheral wall of the tube end of the main body, it will stop when the end cavity wall of the locking cap and the end face of the main body form a clamping relationship with the shoulder 26, thereby fixing the tube body to the main body.

[0020] You can also add bump 27, such as Figure 1 As shown, in front of shoulder 26 ( Figure 1 A groove 25 is formed on the peripheral wall of the tube (located on the right side of the center), and a protrusion 27 is radially slidably connected to the groove. The depth of the groove is greater than the length of the protrusion to accommodate it. An elastic layer, such as rubber, is bonded and fixed to the side of the protrusion that abuts against the groove wall. During normal use, when the protrusion abuts against the end of the main body, the end of the main body is connected by a locking nut threadedly, and the two cooperate to clamp the protrusion. Alternatively, the protrusion can be pressed into the groove, and then the locking nut cooperates with the end of the main body to clamp the shoulder. Note the axial length of the threaded surface on the peripheral wall of the end of the main body. It is necessary to ensure that when the shoulder abuts against the end face of the end of the main body, the locking nut can engage with the threaded surface on the peripheral wall of the end of the main body. This structure allows adjustment of the length of the movable tube extending from the main body, making it convenient to install on different models of vacuum cleaners.

[0021] The tube body 21 of the active tube 2 extends into the cavity of the main body 1 to form a nested structure. The space between the peripheral wall of the tube body 21 and the cavity wall of the main body 1 is filled with sound-absorbing material to form a sound-absorbing layer 3. The tube body is then located in the ring formed by the sound-absorbing layer.

[0022] An end cap 22 is connected to the left end of the tube body 21, and the end cap 22 engages with the end face of the tube body 21 to clamp the filter element 23. A through hole 24, corresponding to the opening of the tube body, is formed in the middle of the end cap 22, allowing the filter element 23 to filter the gas flowing into the tube body cavity through the through hole. The filter element is similar to a common filter screen. The connection between the end cap and the tube body end is similar to a common threaded connection structure. The end cap 22 is groove-shaped, and the groove wall of the end cap 22 is threadedly engaged with the peripheral wall of the tube body end. The diameter of the through hole is smaller than the diameter of the filter element, facilitating the clamping of the filter element by the engagement of the cavity wall around the through hole of the end cap with the end face of the tube body. The end cap can be unscrewed to replace the filter element when needed.

[0023] In this example, the diameter of the openings at the beginning and end of the main body 1 is the same as the outer diameter of the tube 21 to support the tube. This structure helps to improve the stability of the tube support.

[0024] Regarding the connection between the main body and other mechanisms of the vacuum cleaner, for example, multiple seats 4 are fixed at intervals on the peripheral wall of the tail end of the main body 1. The seats 4 have through holes formed along the axial direction. When fixing, the end of the bolt 5 passes through the through hole and is threaded to other mechanisms.

[0025] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A vacuum cleaner duct structure, comprising a cylindrical main body and a movable tube that are nested together, characterized in that, The movable tube includes an end cap, a locking cap, a tube body, and a filter element. The locking cap is fitted onto the tube body and is connected to the end of the main body to fix the tube body to the main body. The end cap is connected to the end of the tube body and clamps the filter element by cooperating with the end face of the tube body. A through hole corresponding to the opening of the tube body is provided in the middle of the end cap so that the filter element can filter the gas flowing into the tube body cavity from the through hole.

2. The vacuum cleaner duct structure as described in claim 1, characterized in that: The end cap is in the shape of a groove, and the groove wall of the end cap is threadedly engaged with the peripheral wall of the end of the tube.

3. The vacuum cleaner duct structure as described in claim 2, characterized in that: A shoulder is provided on the peripheral wall of the tube body. The diameter of the end cavity of the locking cap is greater than or equal to the diameter of the shoulder. The diameter of the beginning cavity of the locking cap is less than the diameter of the shoulder. The locking cap is threaded to the peripheral wall of the end of the main tube.

4. The vacuum cleaner duct structure as described in claim 3, characterized in that: A groove is provided on the peripheral wall of the tube body in front of the first shoulder, and a protrusion is slidably connected to the groove. The depth of the groove is greater than the length of the protrusion, and an elastic layer is provided on the side of the protrusion that abuts against the groove wall.

5. The vacuum cleaner duct structure as described in claim 1, characterized in that: A sound-absorbing layer is provided on the cavity wall of the main body, and the tube body is located in the annulus formed by the sound-absorbing layer.

6. The vacuum cleaner duct structure as described in claim 1, characterized in that: The diameter of the openings at the beginning and end of the main body is the same as the outer diameter of the tube to support the tube.

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