CN113001893A

CN113001893A - Rolling brush body, rolling brush, dust collection equipment and forming method of rolling brush body

Info

Publication number: CN113001893A
Application number: CN202110181830.9A
Authority: CN
Inventors: 倪健; 梁永祥
Original assignee: Suzhou Jinlaike Precision Mould Technology Co ltd; Kingclean Electric Co Ltd
Current assignee: Suzhou Kinglake Precision Molding Technology Co ltd; Kingclean Electric Co Ltd; Lexy Electric Green Energy Technology Suzhou Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-22
Anticipated expiration: 2041-02-09
Also published as: CN113001893B; WO2022170668A1

Abstract

The invention relates to the technical field of dust collection equipment, in particular to a rolling brush body, a rolling brush, dust collection equipment and a forming method of the rolling brush body. The rolling brush body is used for installing a cleaning piece to form a rolling brush, the rolling brush body comprises a hollow cylinder body, a spiral structure is arranged on the outer wall of the cylinder body and used for installing the cleaning piece, the spiral structure winds the axis of the cylinder body to extend in a spiral mode, and the number of the spiral structures is at least three and/or the spiral structures winds the rotation angle of the axis of the cylinder body is not smaller than 180 degrees. In the rolling brush body, the cylinder body is of a hollow structure, so that the weight is light, and the energy consumption required by the rotation of the rolling brush body can be reduced; the outer wall of the barrel is provided with the spiral structure for installing the brush body, and the fixing effect of the brush body and the gathering effect of dust can be guaranteed by ensuring that the spiral structure has a certain number and/or a certain rotating angle, so that the cleaning effect of the dust collecting equipment is improved.

Description

Rolling brush body, rolling brush, dust collection equipment and forming method of rolling brush body

Technical Field

The invention relates to the technical field of dust collection equipment, in particular to a rolling brush body, a rolling brush, dust collection equipment and a forming method of the rolling brush body.

Background

The dust collector is a cleaning device which utilizes a motor to drive blades to rotate at a high speed and generates air negative pressure in a sealed shell to absorb dust. The rolling brush is arranged in the dust collector, and the rolling brush rotates to flap the ground to lift dust, so that the dust collection effect is improved.

The rolling brush comprises a rolling brush body and a brush body, wherein the brush body is arranged on the outer wall of the rolling brush body and extends spirally. The roller brush body is generally of a solid structure, so that the weight of the roller brush body is large, and the energy consumption required by the rotation of the roller brush is large.

In order to reduce the energy consumption of the rolling brush body during rotation, part of the rolling brush body is of a hollow structure, and a spiral groove or a spiral rib is arranged on the outer wall of the rolling brush body so as to facilitate the installation of the brush body. In the prior art, a mold for molding a roller brush body generally comprises a movable mold, a fixed mold and an inner core, wherein after the movable mold and the fixed mold are assembled, the movable mold and the fixed mold the outer wall of the roller brush body, and the inner core molds the inner wall of the roller brush body. After molding, the inner core moves along the axial direction to realize mold stripping, and the movable mold and the fixed mold are opened so as to take out the molded rolling brush body.

Above-mentioned round brush body structure, though can alleviate the weight of the round brush body, nevertheless receive the restriction of mould structure and drawing of patterns mode, the angle of recess or bead around the axis of round brush body is less, generally can not reach 180, and only can set up one or two recesses or beads on the round brush body, influences the result of use of round brush.

Disclosure of Invention

The invention aims to provide a rolling brush body, a rolling brush, dust collection equipment and a forming method of the rolling brush body, which can improve the using effect of the rolling brush body.

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

a rolling brush body is used for installing a cleaning piece to form a rolling brush and comprises a hollow cylinder body, wherein a spiral structure is arranged on the outer wall of the cylinder body and used for installing the cleaning piece, the spiral structure extends spirally around the axis of the cylinder body, and the number of the spiral structures is at least three and/or the spiral structures extend around the rotation angle of the axis of the cylinder body is not less than 180 degrees.

Wherein the spiral structure is a spirally extending recess or a spirally protruding part.

Wherein the helical structure comprises a first helical section and a second helical section which are connected, and the helical parameters of the first helical section and the second helical section are different.

Wherein the helical parameters include a pitch, a helix angle and/or a helical direction.

Wherein the first helical section and the second helical section have opposite helical directions.

The rolling brush body is formed by injection molding, the outer contour surface of the rolling brush body comprises a first molding surface and a second molding surface which are connected, and a clamping line is formed at the joint of the first molding surface and the second molding surface.

The second molding surfaces are provided with multiple sections and are arranged at intervals along the circumferential direction of the rolling brush body, and the first molding surfaces are connected with the second molding surfaces.

The second molding surfaces are provided with multiple sections, the second molding surfaces are arranged along the circumferential direction of the rolling brush body and connected, the second molding surfaces are connected with the first molding surfaces, and the wire clamping is arranged between the adjacent second molding surfaces.

The rolling brush body comprises two sections of first molding surfaces, the second molding surface is located between the two sections of first molding surfaces and is respectively connected with the two sections of first molding surfaces, and the connecting part of the second molding surface and each first molding surface is provided with the clamping line.

The wire clamping device comprises a barrel, a wire clamping device and a wire clamping device, wherein the wire clamping device comprises a first wire section and a second wire section extending along the circumferential direction of the barrel, the first wire section and the second wire section are arranged at an included angle, and the end part of the first wire section is connected with the second wire section.

Wherein the first line segment is parallel to the spiral direction of the spiral structure.

The two first line segments and the two second line segments are alternately connected to form the second molding surface, and the second molding surface is positioned on the spiral structure or beside the spiral structure.

Wherein, helical structure is the depressed part of spiral extension, the depressed part is formed by the outer wall indent of barrel.

Wherein, the opening of the depressed part gradually increases along the radial direction of the cylinder to the axial direction departing from the cylinder.

Wherein, the cross-sectional shape of depressed part is V type, trapezoidal or arc.

The inner wall of the barrel is convexly provided with a first rib spirally extending at a position corresponding to the concave part, and the concave part is inwards concave to the first rib.

The outer wall of the barrel is provided with a reference blind hole corresponding to the first convex edge, and the reference blind hole can be processed into a hair planting hole.

The first rib is provided with a plurality of reference blind holes, and the plurality of reference blind holes are arranged along the spiral direction of the first rib.

The inner wall of the barrel is provided with a second rib protruding from the inside of the barrel and extending spirally, the barrel corresponds to a groove which is recessed in the outer wall of the second rib to form spiral extension inside the second rib, the groove is provided with a first width and a second width which are arranged from inside to outside along the radial direction of the barrel, and the first width is larger than the second width.

The shape of the groove extending into the second rib is matched with that of the second rib.

Wherein, the wall thickness of the rolling brush body is 2-4 mm.

The second convex edges and the spiral structures are alternately arranged along the circumferential direction of the cylinder body and are distributed at intervals, and the grooves are formed in the positions, corresponding to the second convex edges, of the outer wall of the cylinder body.

Wherein, the external diameter of the cylinder is 40mm-60 mm.

A rolling brush comprises a cleaning piece and the rolling brush body, wherein the cleaning piece is arranged on the spiral structure.

The dust collecting equipment comprises a floor brush assembly, wherein the floor brush assembly comprises a shell and a rolling brush, and the rolling brush is rotatably arranged in the shell.

A method for forming a rolling brush body is applied to an injection mold and used for processing the rolling brush body, the rolling brush body is formed by injection molding of the injection mold, the injection mold comprises an outer mold core and an inner mold core penetrating through the outer mold core, a forming cavity is formed between the inner mold core and the outer mold core when the inner mold core and the outer mold core are located at forming positions, and a first spiral forming structure for forming a spiral structure is arranged on the outer mold core;

the molding method comprises the following steps:

an injection molding step of injecting an injection molding material into the molding cavity to form the roller brush body having a hollow cylinder body in the molding cavity;

and demolding, namely, at least part of the first spiral forming structure is separated from the formed rolling brush body through spiral motion.

The outer core comprises a first outer core and a second outer core, the second outer core comprises at least two clamping parts which are arranged along the circumferential direction of the rolling brush body, the first spiral forming structure is arranged on the inner wall of the first outer core and/or the clamping parts, and the clamping parts and the first outer core are spliced to form the outer core when being positioned at a forming position; when a formed rolling brush body is formed in the forming cavity, the at least two clamping parts clamp the rolling brush body;

the demolding step comprises:

a first outer core demolding step of spirally moving the first outer core around an axis of the roll brush body to be detached from the roll brush body;

an inner core demolding step, wherein the inner core is separated from the rolling brush body;

and a second outer core demolding step, wherein at least two clamping parts deviate from the rolling brush body along the radial direction of the rolling brush body so as to be separated from the rolling brush body.

The outer core comprises two first outer cores, and the clamping part is positioned between the two first outer cores and can be spliced with the two first outer cores respectively;

in the first outer core demoulding step, the two first outer cores simultaneously perform spiral motion and respectively move towards two ends of the axis of the rolling brush body.

Wherein, be provided with second spiral forming structure on the outer wall of inner core, inner core drawing of patterns step specifically includes:

the inner core is spirally moved around an axis of the roll brush body to be separated from the roll brush body.

The inner core comprises two inner mandrels, and the two inner mandrels can be spliced along the axial direction;

in the inner core demoulding step, the two inner core shafts simultaneously perform spiral motion and respectively move towards two ends of the axis of the rolling brush body.

Wherein, still include before the step of moulding plastics:

and a mold closing step, wherein the inner mold core and the outer mold core move to be in a molding position.

Wherein, still include before the step of moulding plastics:

a mold closing step, wherein the mold closing step comprises:

at least two of the clamping parts approach each other until the clamping parts move to the forming positions thereof;

and the first outer core moves spirally until the first outer core is spliced with the clamping part to form the outer core, and the inner core is inserted into the outer core until the forming cavity is formed.

Has the advantages that: the invention provides a rolling brush body, a rolling brush, dust collection equipment and a forming method of the rolling brush body. In the rolling brush body, the cylinder body is of a hollow structure, so that the weight is light, and the energy consumption required by the rotation of the rolling brush body can be reduced; the outer wall of the barrel is provided with the spiral structure for installing the brush body, and the fixing effect of the brush body and the gathering effect of dust can be guaranteed by ensuring that the spiral structure has a certain number and/or a certain rotating angle, so that the cleaning effect of the dust collecting equipment is improved.

Drawings

Fig. 1 is a schematic structural view of a vacuum cleaner according to an embodiment of the present invention;

FIG. 2 is a schematic view of another vacuum cleaner according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a first rolling brush body according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a second rolling brush body according to a first embodiment of the present invention;

FIG. 5 is a prior art mold;

FIG. 6 is a first schematic diagram illustrating the limitation of a conventional roller brush during demolding of a mold according to a first embodiment of the present invention;

FIG. 7 is a schematic diagram of a second limitation of a conventional roller brush for demolding a mold according to a first embodiment of the present invention;

FIG. 8 is a schematic diagram of a limitation of a conventional roller brush for demolding a mold according to a first embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating a limitation of a conventional roller brush for demolding a mold according to a first embodiment of the present invention;

fig. 10 is a relation curve one of < BAE and < GOD provided in the first embodiment of the present invention;

FIG. 11 is a first schematic view of a difficult-to-demold position in the roll brush body;

fig. 12 is a second relation curve of < BAE and < GOD provided in the first embodiment of the present invention;

FIG. 13 is a second schematic view of a hard-to-demold position in the roll brush body;

fig. 14 is a schematic structural view of a mold for molding a roll brush body according to an embodiment of the present invention;

FIG. 15 is a schematic structural view of a second outer core and a rolling brush body according to an embodiment of the present invention;

FIG. 16 is a schematic view of a portion of a second outer core according to an embodiment of the present invention;

fig. 17 is a sectional view showing a state where an outer core and an inner core are clamped together according to an embodiment of the present invention;

FIG. 18 is a schematic structural view of a rolling brush body at a first angle according to a second embodiment of the present invention;

fig. 19 is a relation curve of < BAE and < GOD provided in the second embodiment of the present invention;

FIG. 20 is a schematic structural view of a rolling brush body at a second angle according to a second embodiment of the present invention;

fig. 21 is a schematic structural view of a mold for molding a roll brush body according to a second embodiment of the present invention;

FIG. 22 is a schematic structural view of a first roll brush body according to a third embodiment of the present invention;

FIG. 23 is a sectional view of the first roll brush body of the third embodiment of the present invention assembled with a cleaning member;

FIG. 24 is a schematic view showing the shape of a recess in a second type of roll brush body according to a third embodiment of the present invention;

FIG. 25 is a schematic view showing the shape of a groove in a third type of roll brush body according to a third embodiment of the present invention;

fig. 26 is a sectional view showing a state where an outer core and an inner core are clamped together according to a third embodiment of the present invention;

fig. 27 is a schematic structural view of a first rolling brush body provided in a third embodiment of the present invention after a punching process;

fig. 28 is a schematic structural view of a roll brush made of the first roll brush body according to a third embodiment of the present invention;

fig. 29 is a schematic structural view of an injection mold according to a fourth embodiment of the present invention in a mold clamping state;

FIG. 30 is a schematic structural view of an injection mold according to a fourth embodiment of the present invention, in which the first outer core is in a mold-released state;

FIG. 31 is a schematic structural view of an injection mold according to a fourth embodiment of the present invention, in a state where the first outer core and the inner core are in a mold-released state;

fig. 32 is a schematic structural view of an injection mold in a mold-released state according to a fourth embodiment of the present invention.

Wherein:

100. a dust collection device; 110. a floor brush assembly; 120. a shaft body;

1. a rolling brush body; 11. a barrel; 111. a groove; 112. a first line segment; 113. a second line segment; 114. a first molding surface; 115. a second molding surface; 116. a third line segment; 117. a recessed portion; 1171. planting hair holes; 12. a second rib; 13. a first rib; 2. a cleaning member;

200. a mold; 21. an outer core; 211. a first outer core; 2111. forming edges by grooves; 2112. splicing grooves; 212. a clamping portion; 2121. a first edge; 2122. a second edge; 2123. forming edges in a concave manner; 22. an inner core; 221. an inner mandrel; 2211. a second rib forming groove; 2212. a first rib forming groove; 222. an end seal block;

301. moving the mold; 302. fixing a mold; 303. an inner core.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

The embodiment provides a dust collecting device 100, a dust collecting channel and a fan are arranged in the dust collecting device 100, a dust collecting inlet is arranged on the dust collecting device 100, and a rolling brush is rotatably arranged at the dust collecting inlet. When the fan works, the air pressure in the dust suction channel can be changed, so that an air pressure difference is formed between the inside and the outside of the dust suction device 100, and dust outside the dust suction device 100 enters the dust suction channel from the dust suction inlet under the action of the air pressure difference, so that the purposes of dust removal and cleaning are achieved. In the dust absorption process, the round brush rotates at the dust absorption entrance, treats the dust absorption surface through patting, can raise the dirt bits on treating the dust absorption surface to improve dust absorption effect.

Alternatively, the dust collecting apparatus 100 may be a vacuum cleaner or a sweeping robot, wherein the vacuum cleaner may be an upright type vacuum cleaner as shown in fig. 1, or a canister type vacuum cleaner as shown in fig. 2. In the present embodiment, the dust suction apparatus 100 is described taking a dust collector as an example.

The dust collector comprises a shaft 120, a holding part arranged at one end of the shaft 120 and a floor brush component 110 arranged at the other end of the shaft 120, wherein the floor brush component 110 comprises a shell, a dust collection inlet is arranged at the bottom surface of the shell, a dust collection port is also arranged on the shell, and the dust collection port is communicated with a dust collection container in the dust collector. The airflow carries dust on the ground to enter the dust collecting container after passing through the dust collecting inlet and the dust collecting port in sequence.

In this embodiment, the round brush includes the round brush body 1 and sets up cleaning member 2 on the round brush body 1, and the round brush body 1 is used for installing cleaning member 2, and cleaning member 2 rotates along with the round brush body 1, plays the effect of patting and treating the dust absorption surface to make the dirt bits raise, improve dust absorption effect.

Further, the cleaning piece 2 extends spirally around the axis of the rolling brush body 1, and can guide the airflow to flow along the extending direction of the cleaning piece 2 on the basis of flapping the surface to be cleaned, so as to guide the airflow to carry dust into the dust collecting port.

In addition, cleaning member 2 is the heliciform and extends, compares that cleaning member 2 is the straight line extension along the axis of the round brush body 1, can reduce the contact area and the instantaneous effort of cleaning member 2 each moment with ground, avoid subaerial particulate matter to pop beng up because of the effort that receives cleaning member 2 to prevent to increase and hard particulate matter and pop beng up the back and bounce and hinder the user or damage furniture, avoid simultaneously because of the problem that the dust bits take off the cleaning efficiency decline that leads to in the vacuum adsorption area of round brush subassembly 110.

Alternatively, the cleaning member 2 may be a brush or a leather strip. The brush and the leather strip are both flexible, the brush is used for cleaning the carpet, and the leather strip can be used for cleaning the bottom plate.

In this embodiment, as shown in fig. 3 and 4, the rolling brush body 1 includes a hollow cylinder 11, a spiral structure is provided on an outer wall of the cylinder 11, the spiral structure is used for installing the cleaning member 2, the spiral structure extends around an axis of the cylinder 11, the number of the spiral structures is at least three and/or the rotation angle of the spiral structure around the axis of the cylinder 11 is not less than 180 degrees. Wherein, the rotation angle of the helical structure around the axis of the cylinder 11 in fig. 3 is not less than 180 degrees, and the helical structure in fig. 4 is exemplarily provided with three.

For convenience of explaining the rotation angle of the spiral structure around the axis of the cylinder 11, two ends of the spiral structure along the length direction thereof are respectively referred to as a first end and a second end, because the shape of each section of the spiral structure is the same, the section of the rolling brush body 1 at any section perpendicular to the axis thereof is the same, and only the placement position of the section corresponding to the spiral structure along the circumferential direction of the cylinder 11 is different. On the projection plane perpendicular to the axis of the cylinder 11, the projection of the spiral structure is an arc line, and the center of the arc line is located on the axis of the cylinder 201. Taking any point of the first end of the spiral structure as a reference point, wherein in the process that the reference point moves from the first end to the second end in a spiral manner, a motion track formed by a projection point of the reference point on the projection surface is an arc line, and the center of the arc line is located on the axis of the cylinder 11. The rotation angle around the center of the circle in the movement process of the projection point is the rotation angle of the spiral structure around the axis of the cylinder 11.

It will be appreciated that the above-mentioned angle of rotation is related to the number of turns of the helical structure around the barrel 11, for example if the helical structure makes 1 turn around the circumference of the barrel 11, the angle of rotation is 360 degrees; if the helical structure makes half a turn around the circumference of the cylinder 11, the rotation angle is 180 degrees.

In this embodiment, by ensuring the number of the spiral structures and/or the spiral angle around the axis of the cylinder 11, the dust collecting effect of the roll brush can be ensured, thereby improving the cleaning effect of the dust collecting apparatus 100.

Preferably, the helical structure is rotated about the axis of the barrel 11 by an angle of not less than 360 degrees. Illustratively, the helical structure may be wound one or two times around the circumference of the barrel 11.

Alternatively, the helical structure may be a helically extending section of the recess 117 or a helical protrusion. In this embodiment, in order to ensure the smoothness of the outer wall of the rolling brush body 1 and to avoid dust accumulation, the spiral structure is a concave part 117. Furthermore, the spiral structure is the recess 117, and the spiral structure can be prevented from increasing the radial dimension of the roll brush body 1.

Illustratively, the outer diameter of the cylinder 11 may be 40mm to 60mm, and specifically may be 40mm, 42mm, 45mm, 47mm, 49mm, 50mm, 52mm, 55mm, 57mm, 59mm, 60 mm.

When the rolling brush body is formed by adopting an injection molding process in the prior art, the main factor that the number of the spiral structures and the rotation angle on the rolling brush body 1 are limited is the difficulty in demolding. As shown in fig. 5, the existing mold comprises a movable mold 301, a fixed mold 302 and a core 303, the movable mold 301 and the fixed mold 302 can approach or move away from each other, the movable mold 301 and the fixed mold 302 can be spliced to form a cavity, and the core 303 is placed in the cavity, so that the core 303, the fixed mold 302 and the movable mold 301 jointly enclose a molding cavity. The demolding direction of the movable mold 301 is the direction departing from the fixed mold 302.

In this embodiment, the cross-sectional shape of the cylinder 11 is kept constant along the axis thereof, and it can be understood that, since the recess 117 extends spirally, the shape of any cross section of the roll brush body 1 is the same, and only the placement positions of the corresponding cross sections of the recess 117 along the circumferential direction of the cylinder 11 are different, and the shapes of the cross sections of the roll brush body 1 are the same, so that the weight distribution of the roll brush body 1 is uniform, which is helpful for keeping dynamic balance in the rotation process of the roll brush body 1, and the support stress when the roll brush body 1 rotates is small, which is helpful for prolonging the service life and reducing the noise in the working process of the roll brush.

For convenience of understanding, the conventional die will be described with reference to the case where the recessed portions 117 are V-shaped grooves, to limit the number of the recessed portions 117 and the surrounding angle along the circumferential direction of the barrel 11. As shown in fig. 6 to 8, a cross section of the roll brush body 1 was selected for analysis. The circle O is the outer contour of the cylinder 11, the point O is the center of the outer circle of the cylinder 11, the depressed part 117 is an easy-demoulding shape, namely an open groove, the opening of the depressed part 117 is gradually enlarged along the direction far away from the center of the circle, the depressed part 117 is a circular arc groove, the circle O 'is the outer contour circle of the depressed part 117, the point O' is positioned on the extension line of the radius of the circle O, the point B and the point C are two intersection points of the circle O 'and the circle O, and the connecting line of the point O and the point O' intersects the circle O at the point G. Passing through point B and point C, respectively, to make tangent line of circle O ', where the tangent line intersects with line OO' at point A.

Then ≈ BAC is the bottom end angle of the recess 117, line OD is the bisector of ═ BAC, and line EF crosses the top of ═ BAC and is parallel to the demolding direction X. The cross-sections of the rolling brush body 1 at different positions on its outer surface are the same as in fig. 6, and only the angle of rotation of the cross-sectional profile of the recess 117 with respect to the point O of the circle is different.

The shape of the recess 117 shown in fig. 6 to 8 is merely an example, and the recess 117 is not limited to this shape, and may be a shape in which a circle intersects a trapezoid, and in the case of a non-isosceles trapezoid, the line AB and the line AC may not be provided symmetrically with respect to the line OD.

Note that the cross section shown in fig. 6 is a section perpendicular to the axis of the cylinder 11.

When the movable die 301 is demolded in the illustrated X direction, the cross section of the outer contour shown in fig. 6 is taken as the cross section corresponding to the initial first end of the spiral structure, and when the rotation angle of the spiral structure around the axis of the cylinder 11 is not more than 90 degrees, in one case, as shown in fig. 6 and 7, when the cross-sectional central line AE is located in the region of ═ BAC, the convex part of the molding concave part 117 on the die 200 can be smoothly released from the concave part 117; in another case, when the cross-sectional centerline AE is outside the region of ≈ BAC, as shown in fig. 8, the convex portion of the molding recess 117 is restricted by the AB surface in the recess 117 during demolding, and cannot be smoothly released from the recess 117. The clockwise rotation angle is a positive angle, and the counterclockwise rotation angle is a negative angle.

When the section is rotated clockwise by an angle greater than 90 degrees and less than 180 degrees about the point O, as shown in fig. 9, the demolding direction X is opposite to the direction in fig. 6 and 7. When the section central line AE is positioned in the & lt BAC, the convex part of the molding concave part 117 on the mold 200 can be smoothly separated from the concave part 117; as shown in fig. 9, when the sectional centerline AE is outside the ≈ BAC, the convex portion of the molding recess 117 is restricted by the AC surface in the recess 117 at the time of mold release, and cannot be smoothly released from the recess 117.

To more intuitively illustrate the specific location where the helical structure cannot be demolded during demolding, the present example was analyzed as follows.

According to the analysis, the key factor of whether demoulding can be carried out is the angle of ≈ BAE. With the cross-sectional shape and size of recess 117 not being the basis, i.e., < BAC as a fixed angle, line OG passes through center O and is parallel to stripping direction X, and the following relationship exists between < BAE and < GOD:

when the clockwise rotation angle of the section around the point O is not more than 90 degrees, namely the angle GOD is not more than 90 degrees:

as shown in fig. 7 and 8, line OG is parallel to line FE, and therefore, angle GOD is angle EAD;

line OD is the angular bisector of < BAC, so that < BAD > is < BAC/2;

∠BAE＝∠BAD-∠EAD＝∠BAC/2-∠GOD；

when ≈ BAE <0, the line EF is located outside ≈ BAC, and the convex portion of the molding recess 117 cannot be demolded.

When the clockwise rotation angle of the section around the point O is more than 90 degrees and less than or equal to 180 degrees, namely < GOD is more than or equal to 90 degrees:

as shown in fig. 9, angle GOD is 180 ° -, angle DOH is 180 ° -, angle DAE;

∠BAE＝∠BAD+∠DAE＝∠BAC/2+180°-∠GOD；

when ═ BAE >. sub &, line EF is outside &, the convex portion of the molding recess 117 cannot be demolded.

The relation curve of < BAE and < GOD can be drawn according to the above rule as shown in fig. 10, wherein the shaded part is the region which can not be demoulded.

As can be understood, the relationship of angle BAE and angle GOD is a periodic function, with a period of 180 °.

From the above analysis, it can be seen that, when the roller brush body 1 is produced by using the conventional mold, if the rotation angle of the cleaning member 2 around the axis of the cylindrical body 11 is not limited, the recessed portion 117 of the roller brush body 1 has a problem that the mold cannot be smoothly released at a partial position in the longitudinal direction of the roller brush body 1, and as shown in fig. 11, the hatched portion is the mold-releasing-impossible position. Wherein, the surface a is the contact surface of the movable mold 301 and the fixed mold 302, and the line b is a clipping line formed on the rolling brush body 1 and corresponding to the splicing position of the movable mold 301 and the fixed mold 302.

When the number of the recessed portions 117 is two, an included angle between first ends of the two recessed portions 117 along the circumferential direction of the barrel 11 is 180 degrees. A relation curve corresponding to ≦ BAE and ≦ GOD corresponding to the first recess 117 is shown in fig. 10 and is recorded as a first relation curve, a relation curve corresponding to the second recess 117 is recorded as a second relation curve, the second relation curve has the same rule as the first relation curve, only the starting point is different, the starting point of the second relation curve is 180 °, that is, the second relation curve is shifted to the right for the first relation curve, and the unmoulded positions of the first relation curve and the second relation curve are overlapped.

When the number of the depressed parts 117 is three, the included angle of the first ends of the three groove parts 117 along the circumferential direction of the cylinder 11 is 120 degrees, the relationship curve rules of the < BAE and the < GOD corresponding to the three depressed parts 117 are the same, only the three depressed parts need to be shifted by 120 degrees in sequence, and the corresponding curves are as shown in fig. 12. The solid line is a corresponding relation curve of the first recess 117, the dashed line is a corresponding relation curve of the second recess 117, and the two-dot chain line is a corresponding relation curve of the third recess 117. The corresponding positions of the three recesses 117 which cannot be demoulded are not coincident.

From the above analysis, it can be seen that when the number of the recesses 117 is at least three, there must be some recesses 117 on the roller brush body 1 corresponding to the mold-unmoldable position, as shown in fig. 13, the hatched portion is the mold-unmoldable position. In order to solve the above problems, in the prior art, a slide is usually arranged at a position corresponding to a shadow part of the roll brush body 1, the slide is spliced and matched with the movable mold 301 or the fixed mold 302 to realize injection molding, and the demolding direction of the slide is different from that of the movable mold 301 or the fixed mold 302. Because the shadow part on the rolling brush body 1 is discontinuous, a plurality of rows need to be added, the structure of the die is complex, and the appearance of the rolling brush body is affected due to more clamping lines on the formed rolling brush body.

In order to mold the rolling brush body 1 provided in this embodiment and ensure that the rolling brush body 1 can be smoothly demolded, as shown in fig. 14, a mold 200 for molding the rolling brush body 1 includes an outer core 21 and an inner core 22, the inner core 22 is inserted into the outer core 21, a cavity for molding the rolling brush body 1 is provided between the inner core 22 and the outer core 21, and the outer core 21 has a molding surface for molding a spiral structure. The inner core 22 includes an inner core shaft 221 and an end block 222, and the end block 222 may be provided separately from the inner core shaft 221 or may be an integral structure. When the end seal block 222 is provided separately from the core shaft 221, the end seal block 222 can abut against the end portions of the core shaft 221 and the outer core 21, respectively, to close the molding cavity. When the end seal block 222 and the inner core shaft 221 are in an integral structure, the end seal block 22 is connected to one axial end of the inner core shaft 221, and the end seal block 222 can abut against the end of the outer core 21 to close the molding cavity.

To avoid the number and rotation angle of the knockout limiting grooves 111, the inner core 22 and the outer core 21 may be stripped in the axial direction of the roll brush body 1 by a screw motion. However, after one of the outer core 21 and the inner core 22 is separated from the roll brush body 1 by the screw motion, the roll brush body 1 needs to be kept stationary so that the other of the outer core 21 and the inner core 22 can move relative to the roll brush body 1 to perform the mold release.

In order to solve the above problem, in the present embodiment, as shown in fig. 14 and 15, the outer core 21 includes a first outer core 211 and a second outer core joined to an axial end of the first outer core 211, the second outer core includes at least two clamping portions 212 arranged in a circumferential direction of the rolling brush body 1, and the at least two clamping portions 212 can be relatively close to each other to be joined to the first outer core 211 and can also be spaced apart from each other in a radial direction of the rolling brush body 1 to be separated from the rolling brush body 1 therein.

When demoulding, the second outer core is fixed, so that the position of the rolling brush body 1 is kept to be fixed through the spiral matching surface between the second outer core and the rolling brush body 1; on this basis, the first outer core 211 and the inner core 22 are spirally demolded about the axis of the roll brush body 1.

After the first outer core 211 and the inner core 22 are separated from the roller brush body 1, at least two clamping sections in the second outer core are separated, the roller brush body 1 is directly separated from the first outer core 211, the product ejection is not needed, and the demolding process is further simplified.

In the embodiment, the rolling brush body 1 is formed in sections, so that the technical bias that the rolling brush body 1 is difficult to perform injection molding processing is overcome, the technical problem of how to demold the structural member after injection molding is solved, and great contribution is made to production and application of the rolling brush body 1.

Specifically, as shown in fig. 14, the first outer core 211 is of a boss structure, and its inner wall is used to mold the outer wall of the roll brush body 1. One end of the first outer core 211 is provided with a splicing groove 2112 spliced and matched with the clamping portion 212, and the splicing groove 2112 extends along the spiral direction of the recess 117. Correspondingly, as shown in fig. 15, the clamping portion 212 in the second outer core extends along the spiral direction of the groove 111, so that when the first outer core 211 moves spirally, the splicing groove 2112 on the first outer core 211 can be spirally sleeved outside the clamping portion 212, and the splicing fit of the clamping portion 212 and the splicing groove 2112 is realized.

In this embodiment, the second outer core includes three clamping portions 212, and is uniformly spaced along the circumference of the barrel 11, and correspondingly, four splicing grooves 2112 are provided on the first outer core 211, and each clamping portion 212 can be spliced with the corresponding splicing groove 2112, so that the first outer core 211 and the second outer core are matched to form a complete outer wall of the roll brush body 1.

In other embodiments, the number of the clamping portions 212 may also be two, four, or more than four, and the specific number may be set according to actual needs.

Correspondingly, as shown in fig. 4, in the rolling brush body 1 molded by using the mold 200, the outer contour surface of the rolling brush body 1 includes a first molding surface 114 and a second molding surface 115 extending along the axial direction and connected with each other, the outer wall of the first molding surface 114 is molded by a first outer core 211, the outer wall of the second molding surface 115 is molded by a second outer core, and the first molding surface 114 and the second molding surface 115 are respectively molded by the first outer core and the second outer core, so that a clamping line is formed between the first molding surface 114 and the second molding surface 115.

It should be noted that the clipping line is a protruding structure formed at the joint of two adjacent molding cavities, that is, a certain splicing gap exists between two adjacent molding cavities, which results in a residual splicing trace on the molded product.

It will be appreciated that the specific shape of the pinch line on the roller brush body 1 is related to the outer core type splice gap.

In this embodiment, as shown in fig. 4, the wire clamping includes a first wire segment 112 and a second wire segment 113 extending along the circumferential direction of the cylinder 11, the first wire segment 112 and the second wire segment 113 are disposed at an included angle, and an end of the first wire segment 112 is connected to the second wire segment 113. Specifically, as shown in fig. 16, the clamping portion 212 has an abutting surface that clamps the roller brush body 1 and shapes a part of the outer peripheral surface of the roller brush body 1, and the abutting surface includes two first edges 2121 parallel to the spiral direction of the recess 117 and two second edges 2122 extending around the circumferential direction of the barrel 11. The two first edges 2121 and one of the second edges 2122 are matched with the splicing groove 2112, a first line segment 112 is correspondingly formed between the first edge 2121 and the side wall of the splicing groove 2112, and the first line segment 112 is parallel to the spiral direction of the recess 117. A second line segment 113 is formed between the second edge 2122 and the splice seam. A second line segment 113 is correspondingly formed between the other second edge 2122 and the end block 222.

Wherein the two first line segments 112 and the two second line segments 113 are alternately connected and enclose a second forming surface 115, the second forming surface 115 being located in the recess 117. In some embodiments, the second molding surface 115 may also be located laterally of the recess 117.

The clamping line further comprises a third line segment 116, the third line segment 116 is correspondingly formed on the rolling brush body 1 at the joint of the outer core 21 and the end sealing block 222, part of the third line segment 116 is overlapped with the second line segment 113, and the third line segment 116 is located at one end face of the rolling brush body 1 and extends along the outer contour line of the end face.

In fig. 4, the clamps are shown as thickened lines.

In some embodiments, at least two clamping portions 212 may be spliced into a complete ring-shaped structure along the circumferential direction of the barrel 11, and the first line segment 112 formed at this time corresponds to the splicing line of two adjacent clamping portions 212, and is not limited to extending along the axis of the barrel 11 or being parallel to the spiral direction of the recess 117.

Alternatively, the cleaning member 2 provided on the roll brush body 1 may be a brush having flexibility, the brush being used for cleaning a carpet.

In this embodiment, the rolling brush body 1 is provided with a brush, the brush comprises a plurality of clusters of bristles, each cluster of bristles is planted on the outer wall of the rolling brush body 1, and the plurality of clusters of bristles extend spirally, so that the brush and the leather strips are matched to improve the cleaning effect. The leather strips can be arranged in the groove 111, and the brush can be fixed in the concave part 117 in a hair planting mode.

With the use of the roll brush, the brush is easily wound with hairs, and the hairs on the brush need to be cleaned regularly, for example, the hairs on the brush are cut by a blade. Through setting up depressed part 17, can make winding hair unsettled in depressed part department, help the blade to carry out cutting operation, conveniently clear up the hair.

Optionally, the opening of the recess 17 gradually increases in the radial direction of the barrel 11 away from the axis of the barrel 11, so that the recess 17 is convenient to form on one hand, and the entangled hair can be cleaned on the other hand.

In order to ensure the hair-planting depth and thus improve the fixing effect of the cleaning element 2, the wall thickness of the cylinder 11 is made thick by increasing the outer diameter of the cylinder 11 or decreasing the inner diameter of the cylinder 11 in the prior art, so that the depth requirement of the groove 111 is met, which results in a large weight of the cylinder 11 and large energy consumption in operation.

In order to solve the above problem, in the present embodiment, the inner wall of the barrel 11 is provided with the first rib 13 extending spirally, and the groove 111 corresponds to the position of the first rib 13. Through setting up first bead 13, can guarantee the planting hair degree of depth on the wall thickness that does not increase barrel 11 and external diameter size's basis, avoid the brush hair to drop, can reduce the influence of planting hair hole 1171 to the rolling brush body 1 intensity simultaneously, and then improve the bulk strength of the rolling brush body 1.

In addition, compare and be provided with spiral bead on the outer wall of barrel 11 and plant the hair, through depressed part 117 and first bead 13, can guarantee that the outer wall surface of barrel 11 is regular, avoid the dust to pile up.

As shown in fig. 17, the outer core 21 is further provided with a concave forming rib 2123 for forming the concave portion 117, and the shape of the concave forming rib 2123 is adapted to the outer contour shape of the concave portion 117; the inner core 22 is provided with a first rib forming groove 2212 for forming the first rib 13. Specifically, the shape of the first rib forming groove 2212 is matched with the first rib 13.

In order to improve the hair planting precision, a reference blind hole is arranged on the outer wall of the barrel body 11 at a position corresponding to the first convex edge 13. In the mold 200 for molding the rolling brush body 1, a positioning convex column is arranged at a position of the outer core 21 corresponding to the first convex rib 13, and the positioning convex column can form a reference blind hole on the outer wall of the rolling brush body 1. The reference blind hole and the cylinder 11 are integrally formed, the reference blind hole can be used as a reference blind hole of the bristle planting hole 1171, the bristle planting hole 1171 is formed by reprocessing the reference blind hole, bristles are fixed, and bristle planting precision is improved.

Specifically, the positioning convex column is arranged on the second outer core, so that a reference blind hole can be formed, the fixing effect of the second outer core and the rolling brush body 1 can be improved, and the first outer core 211 and the inner core 22 are prevented from driving the rolling brush body 1 to move during spiral demoulding.

Further, the plurality of reference blind holes are arranged along the spiral direction of the first protruding ridge 13 to guide the bristle planting direction of the plurality of tufts of bristles.

Example two

The present embodiment provides a dust collecting apparatus 100, which is further improved on the roller brush body 1 based on the first embodiment to improve the dust collecting effect of the roller brush body 1.

As shown in fig. 18, the spiral structure includes a first spiral section and a second spiral section which are communicated with each other, and the spiral parameters of the first spiral section and the second spiral section are different, so that the whole spiral structure is a variable spiral structure, and a better dust removal effect can be obtained according to use requirements. Correspondingly, the first rib 13 includes a first extending section and a second extending section which are connected, the first extending section corresponds to the first spiral section in position and has the same spiral parameter, and the second extending section corresponds to the second spiral section in position and has the same spiral parameter, so as to ensure the depth design requirement of the spiral structure.

It can be understood that after the spiral structure is divided into multiple sections according to different spiral parameters, the core in the mold 200 needs to be divided into multiple sections with the same number correspondingly, so that each section of the core in the mold 200 can be rotationally demolded. Among other things, the helix parameters include, but are not limited to, helix angle, direction of rotation, and pitch.

In this embodiment, the first helical section and the second helical section have opposite helical directions; correspondingly, the helical structure comprises a first helical section and a second helical section which are communicated, the first helical section corresponds to the position of the first extension section, and the second helical section corresponds to the position of the second extension section. After installing cleaner 2, cleaner 2 corresponds and arranges for the V type, and this kind of setting can lead to the gathering of the hookup location department of the first spiral section of air flow direction and second spiral section to play the effect of gathering together to the grime, avoid the grime of raising to the axial both ends diffusion of the round brush body 1, reduce the secondary pollution to the dust absorption surface, thereby improve and clean efficiency and dust collection effect.

It will be appreciated that when the helix is divided into a plurality of helix segments of different parameters, the angle of rotation of the helix about the axis of the barrel 11 is the sum of the absolute values of the angles of rotation of the multiple helix segments about the axis of the barrel 11.

The spiral structure includes two sections (a first spiral section and a second spiral section) with opposite spiral directions. The corresponding cross section of the first end of the spiral structure is selected as the initial cross section (shown with reference to fig. 6), wherein the first end is located at the first spiral segment. In the process of extending from the initial section to the second end helix, the relation curve of < BAE and < GOD on the first helix segment is the same as that shown in fig. 10. As can be seen from fig. 10, the first spiral segment has two consecutive non-demolding positions near the rotation angle of 90 °, i.e., each spiral segment has difficulty in demolding when rotated by about 90 °. If the rotation angles of the first spiral section and the second spiral section around the axis of the cylinder body 11 are larger than 90 degrees, each spiral section has a position where the mold is difficult to be ejected, and the spiral structure integrally has two discontinuous positions where the mold is difficult to be ejected. In order to reduce the position where the mold can not be ejected on the spiral structure after splicing the two spiral sections, one end of the first spiral section with the rotation angle of 90 degrees is connected with one end of the second spiral section with the rotation angle of 90 degrees, the mold ejection direction is rotated by 90 degrees relative to that shown in fig. 6, and a relation curve of ═ BAE and ═ GOD when the spiral structure comprises the two spiral sections with opposite spiral directions can be obtained, as shown in fig. 19, wherein the shadow part is the region where the mold can not be ejected.

In the present embodiment, the diameter of the cylindrical body 11 is kept constant along the axial direction thereof, and therefore, the spiral diameters of the first spiral section and the second spiral section are constant.

In this embodiment, as shown in fig. 20, the rolling brush body 1 includes two first molding surfaces 114, a second molding surface 115 is located between the two first molding surfaces 114 and is connected to the two first molding surfaces 114, and a connecting portion of the second molding surface 115 and each first molding surface 114 and a connecting portion of the two first molding surfaces 114 are formed with a clamping wire. The pinch lines in fig. 20 are shown in bold.

Correspondingly, in the mold 200 for molding the rolling brush body 1, as shown in fig. 21, the outer core 21 includes two first outer cores 211, and the two first outer cores 211 are respectively located at two axial ends of a second outer core. The inner core 22 correspondingly comprises two inner mandrels 221, the two inner mandrels 221 being axially spliced.

Alternatively, the lengths of the first spiral section and the second spiral section may be equal or different, and may be determined according to the position of the dust collecting opening on the housing in the floor brush assembly 110, so that the connection position of the first spiral section and the second spiral section is opposite to the dust collecting opening.

Further, the two inner mandrels 221 can be demolded synchronously, so that the forces applied to the two ends of the roller brush body 1 during demolding of the inner mandrel 22 are balanced, and the roller brush body 1 is further ensured to be stationary.

In addition, the inner core 22 is divided into two sections and demolded simultaneously, which can shorten the demolding stroke of the inner core 22, thereby reducing the overall demolding time and improving the demolding efficiency.

It should be noted that, in the present embodiment, reference may be made to the structure in the first embodiment for the structures of the first outer core 211 and the two inner core shafts 221, and details are not described here.

EXAMPLE III

The present embodiment provides a dust suction apparatus 100 which is further improved on the basis of the first and second embodiments so that the roller brush body 1 can mount the cleaning member 2 by means of snap-fitting.

In this embodiment, as shown in fig. 22, a groove 111 for installing the cleaning element 2 is formed in the outer wall of the cylinder 11, the groove 111 extends spirally, and the groove 111 can clamp and fix the cleaning element 2 without fixing the cleaning element 2 by flocking or bonding. The cleaning element engaged with the groove 111 may be a leather strip or a brush with a single bristle.

In the prior art, the cleaning element 2 and the roller brush body 1 are fixed together, typically by injection molding or adhesive bonding. Because the cleaning part 2 has certain flexibility, the material of the cleaning part is different from that of the rolling brush body 1, when the cleaning part 2 is connected with the rolling brush body 1 in an injection molding mode, the cleaning part 2 and the rolling brush body 1 need to be subjected to double-color mold injection molding, and the cost is high. And the bonding fixing strength is poor, so that the cleaning piece 2 is easily separated from the rolling brush body 1, and the use experience of a user is influenced.

In order to solve the above problem, in the present embodiment, the cleaning element 2 can be fixed to the rolling brush body 1 in a snap-fit manner. In order to facilitate the fixing of the cleaning element 2 and the rolling brush body 1, at least one end of the groove 111 along the length direction penetrates through the axial end face of the cylinder body 11, the groove 111 has a first width and a second width which are arranged from inside to outside along the radial direction of the cylinder body 11, and the first width is larger than the second width. Through the arrangement, the structure in the groove 111 can be prevented from being separated from the opening of the groove 111, the cleaning piece 2 is clamped with the groove 111, the cleaning piece 2 and the groove 111 are not required to be additionally provided with a fastening piece or adhesive glue for fixation, and the structure is simple.

In this embodiment, two ends of the groove 111 penetrate through the end surface of the cylinder 11, so that the cleaning element 2 can be inserted into the groove 111 from any end, and the installation is convenient.

In order to explain the structure of the groove 111, a certain section of the rolling brush body 1 is selected as shown in fig. 23 and 24, and the groove 111 in this embodiment is of an inverted T shape and includes a first groove and a second groove which are communicated with each other, and the first groove is located on one side of the second groove close to the axis of the cylinder 11. The cross-sectional shapes of the first groove and the second groove are both rectangular, the width of the first groove is kept constant along the radial direction of the cylinder 11, and the width of the second groove is kept constant along the radial direction of the cylinder 11. Wherein, the width of first cell body is first width M, and the width of second cell body is second width N, and first width M is greater than second width N for the opening of recess 111 presents closed trend, can prevent that cleaning member 2 from deviating from by in the recess 111.

In addition, the second groove body has a certain depth along the radial direction of the barrel body 11, and two opposite side surfaces of the second groove body can be abutted to the cleaning piece 2, so that the cleaning piece 2 is limited to move in the circumferential direction of the barrel body 11, the cleaning piece 2 is fixed more firmly, and the cleaning effect is improved.

Alternatively, as shown in fig. 25, the groove 111 may have a multi-segment first groove body and/or a multi-segment second groove body.

It is understood that the width of the groove 111 may be varied abruptly or gradually from the first width M to the second width N. When the width of the groove 111 changes suddenly, the groove 111 is divided into a plurality of sections along the radial direction of the cylinder 11, and a transition step surface is formed between the two adjacent sections, so that the cleaning piece 2 can be limited.

When the width of the groove 111 changes gradually, the groove 111 may be a dovetail groove, or as shown in fig. 26, the inner wall of the groove 111 is a cambered surface, so that the width of the groove 111 decreases gradually along the radial direction of the cylinder 11, and the inner wall of the groove 111 has a limiting effect on the cylinder 11, and can prevent the cleaning member 2 from being pulled out of the groove 111. In FIG. 27, only groove 111 is shown, and recess 117 and first rib 13 are not shown.

It is to be understood that the shape of the groove 111 is not limited to the above shape as long as the width of the groove 111 is varied and the wider first width is located on the side of the narrower second width closer to the axis of the cylinder 11.

In order to ensure the depth of the groove 111, the inner wall of the barrel 11 is further provided with a second rib 12 at a position corresponding to the groove 111, and the depth requirement of the groove 111 is met by providing the second rib 12. In addition, compare and be provided with the bulge with processing recess 111 on the outer wall of barrel 11, second bead 12 sets up on the inner wall of barrel 11, can guarantee that the outer wall surface of barrel 11 is regular, avoids the dust to pile up.

Further, the shape of the groove 111 extending into the second rib 12 can be matched with the shape of the second rib 12, so that the wall thickness formed by the second rib 12 and the groove 111 is uniform, which is beneficial to maintaining the dynamic balance of the rolling brush body 1 during the rotation process.

Further, the wall thickness of the barrel 11 may be substantially the same as the corresponding wall thickness of the second rib 12, so as to further ensure the dynamic balance during the rotation of the rolling brush body 1.

For convenience of description, a portion of the groove 111 extending into the first rib 12 is referred to as an adaptation groove section 1111, and a portion of the groove 111 penetrating through the outer wall of the cylinder 11 is referred to as a penetration section 1112. The shape of the fitting groove section 1111 is the same as that of the rib, the side surface of the fitting groove section 1111 facing away from the axis of the cylinder 11 is the top surface, the side surface of the fitting groove section 1111 near the axis of the cylinder 11 is the bottom surface, the top surface of the fitting groove section 1111 is substantially coplanar with the inner surface of the cylinder 11, and the distance between the bottom surface of the fitting groove section 1111 and the side surface of the first rib 12 facing the axis of the cylinder 11 is substantially equal to the wall thickness of the cylinder 11.

In this embodiment, the wall thickness of the rolling brush body 1 is 2-4mm, and the wall thickness of the rolling brush body 1 is within this range, which not only can satisfy the strength requirement of the rolling brush body 1, but also can reduce the weight of the rolling brush body 1 on the basis of the unchanged outer diameter size of the rolling brush body, thereby controlling the cost and the energy consumption of the rolling brush body 1 during operation.

Illustratively, the wall thickness of the roller-brush body 1 may be 2mm, 2.3mm, 2.5mm, 2.7mm, 3mm, 3.3mm, 3.5mm, 3.7mm, 4 mm.

Optionally, the first protruding bead 13 and the second protruding bead 12 can be provided with at least two, and the first protruding bead 13 and the second protruding bead 12 are alternately arranged along the circumference of the barrel 11, and each second protruding bead 12 is correspondingly provided with a groove 111, so that the brush and the glue brush are alternately distributed, which is beneficial to improving the cleaning effect.

Further, the at least two first ribs 13 and the at least two second ribs 12 may be distributed at even intervals, so that the mass distribution of the rolling brush body 1 is more symmetrical, and the rolling brush body 1 can be prevented from shaking during rotation.

In the prior art, due to the special shape of the groove 111, the roll brush body is generally extruded by an extrusion die and then twisted to be molded. Specifically, the conventional roller brush body includes a solid shaft body and a mounting structure (a rib or a groove) provided on the shaft body and extending in an axial direction. The axis body and mounting structure pass through extrusion process shaping back, exert opposite moment of torsion to the both ends of axis body for the axis body drives mounting structure and twists reverse around the axis of axis body, thereby makes mounting structure be the heliciform and extends.

In the forming process, the rolling brush body needs to be formed by twisting, and the material selected by the rolling brush body needs to have certain flexibility, so that the strength of the rolling brush body is insufficient, and the cleaning effect is influenced; in addition, in order to avoid excessive deformation of the rolling brush body during twisting, the shaft body can only be of a solid structure, and if the shaft body is a hollow cylinder body, the hollow cylinder body is easy to collapse in the twisting process, so that the hollow cylinder body is scrapped.

In addition, the outer diameter of the shaft body is generally small due to extrusion process limitations, and the produced roll brush body can be applied only to a small-sized dust suction apparatus 100.

In this embodiment, the roller brush body 1 is formed by injection molding. The material strength of the rolling brush body 1 is good, the use requirement can be met, and the rolling brush body 1 can be of a hollow structure, so that not only can the cost be reduced, but also the energy consumption of the rolling brush body 1 during working can be reduced; the size of the injection molded rolling brush body 1 can be set according to actual needs, and the problem that the size of the rolling brush body 1 is limited is solved.

Due to the special shape of the groove 111, the width change of the groove 111 prevents the mold from being separated from the groove 111 along the radial direction of the cylinder 11, so that the outer core 21 cannot be demolded in a demolding mode of a fixed mold and a movable mold in the traditional mold; and the inner wall of the cylinder 11 is provided with a second rib 12 extending spirally, and due to the interference of the second rib 12, the inner core forming the inner wall structure of the cylinder 11 cannot be separated from the cylinder 11 in a mode of moving along the axial direction of the cylinder 11.

Therefore, a portion of the molding groove 111 in the injection mold is provided on the first outer core 211 so as to be spirally moved in synchronization with the first outer core 211 for mold release. As shown in fig. 26, the injection mold for forming the rolling brush body 1 of the present embodiment further includes a groove forming rib 2111 for forming the groove 111 on the first outer core 211, and a second rib forming groove 2211 for forming the second rib 12 on the inner core 22.

In some embodiments, the groove 111 may be divided into first and second groove segments having different spiral parameters, wherein the spiral parameters include, but are not limited to, a helix angle, a pitch, and/or a spiral direction. The structure of the second embodiment can be referred to as a mold for molding the roll brush body.

As shown in fig. 27, after the hole drilling process is performed on the molded roll brush body 1, a plurality of bristle planting holes 1171 are formed in the recess 117. The roll brush manufactured by using the roll brush body 1 is shown in fig. 28, wherein two leather strips and two brushes are respectively arranged on the roll brush body.

Example four

The present embodiment also provides a method for molding a rolling brush body, which is applied to an injection mold, for molding the rolling brush body 1 in the above embodiments. In this embodiment, the roll brush body 1 of the third embodiment is used as a molded product.

Specifically, the roller brush body 1 is formed by injection molding. The adopted injection mold comprises an outer mold core 21 and an inner mold core 22 arranged in the outer mold core 21 in a penetrating mode, when the inner mold core 22 and the outer mold core 21 are located at forming positions, a forming cavity is formed between the inner mold core 22 and the outer mold core 21, and the rolling brush body 1 is formed in the forming cavity between the outer mold core 21 and the inner mold core 22. The outer core 21 is provided with a concave molding edge 2123 for molding the concave portion 117.

The molding method provided by the embodiment comprises a mold closing step, an injection molding step and a demolding step. In the mold clamping step, the inner core 22 and the outer core 21 are moved to the molding position, and specifically, as shown in fig. 29, the inner core 22 is inserted into the outer core 21 to define a molding cavity, and waits for injection of the injection molding material. In the injection molding step, injection molding materials are injected into the molding cavity, and the molding cavity is filled with the injection molding materials. After the injection molding material is solidified, the demolding step is performed, and the concave molding edge 2123 is separated from the molded rolling brush body 1 through spiral motion around the axis of the rolling brush body 1.

In this embodiment, the mold is removed by the spiral movement of the part of the structure of the molding recess 117 in the injection mold, so that the technical problem of difficulty in injection molding due to factors such as the rotation angle and the number of spiral structures in the first embodiment in the prior art can be solved.

Specifically, the outer core 21 includes a first outer core 211 and a second outer core spliced to an axial end of the first outer core 211, and the second outer core includes at least two clamping portions 212 arranged in the circumferential direction of the roll brush body 1. When the clamping part 212 and the first outer core 211 are positioned at the molding position, the outer core 21 is formed by splicing; when the formed roll brush body is formed in the forming cavity, the roll brush body is clamped by at least two clamping portions 212.

The demolding step specifically comprises:

a first outer core mold release step of spirally moving the first outer core 211 around the axis of the roll brush body 1 to be separated from the roll brush body 1; at this time, the clamping portions 212 clamp the rolling brush body, for example, as shown in fig. 30, at least two clamping portions 212 clamp the rolling brush body 1;

an inner core demolding step of moving the inner core 22 relative to the roller brush body 1 to be detached from the roller brush body 1, as shown in fig. 31;

in the second outer core removing step, at least two clamping portions 212 are separated from the roller brush body 1 in the radial direction of the roller brush body 1 to be separated from the roller brush body 1, as shown in fig. 32.

In the demoulding step, on the basis that the second outer core is kept immovable, the first outer core and the inner core are firstly demoulded, so that the rolling brush body 1 can be prevented from rotating along with the first outer core or the inner core, and smooth demoulding of the first outer core and the first inner core is facilitated.

When the first outer core 211 and the inner core 22 are demolded, the second outer core is stationary to keep the position of the roll brush body 1 stationary through the spiral mating surface between the second outer core and the roll brush body 1; on this basis, the first outer core 211 and the inner core 22 rotate around the axis of the roll brush body 1, respectively. Because the first outer core 211 and the inner core 22 are both in spiral fit with the rolling brush body 1, the first outer core 211 and the inner core 22 can move along the axial direction of the rolling brush body 1 in the rotating process and further separate from the rolling brush body 1, so that the first outer core 211 and the inner core 22 are demolded.

The second outer core realizes demoulding by the radial movement of at least two clamping parts 212 along the roller brush body 1, and after the first outer core 211 and the inner core 22 are separated from the roller brush body 1, the roller brush body 1 can be directly separated from the mould 200 by the mutual separation of the two clamping parts 212, so that the product ejection is not needed, and the demoulding process is further simplified.

It should be noted that the demolding step is also applicable to the structure of the outer core 21 shown in fig. 13, and the description of this embodiment is omitted here.

In this embodiment, the first outer core 211 is further provided with a groove forming rib 2111 to form the groove 111, and the groove forming rib 2111 can spirally move with the first outer core 211 to be separated from the groove 111.

In this embodiment, the inner core 22 is provided with the first rib forming groove 2212 for forming the first rib 13 and/or the second rib forming groove 2211 for forming the second rib 12, so that the inner core 22 is released from the mold by screwing the inner core 22 around the axis of the rolling brush body 1;

it is understood that the moving direction of the outer core 21 and the inner core 22 in the mold clamping step is opposite to the moving direction in the mold releasing step. Specifically, the mold closing step comprises:

the at least two clamping portions 212 approach each other along the roll brush body 1 until the second outer core moves to its molding position;

the first outer core 211 and the inner core 22 move spirally and in the opposite direction to the demolding, the first outer core 211 moves spirally until the first outer core 211 is spliced with the clamping part 212 to form the complete outer core 21, and the inner core 22 is inserted into the outer core 21 until the inner core 22 and the outer core 21 enclose a molding cavity.

In the step of die assembly, the second outer core returns first, so that the first outer core 211 can be spliced with the second outer core through spiral motion, and the splicing precision of the second outer core and the first outer core is improved.

Specifically, the outer core 21 includes two first outer cores 211, and the second outer core is located between two first outer cores 211 to the embodiment that can splice with two first outer cores 211 respectively, through setting up two first outer cores 211, in first outer core drawing of patterns step, two first outer cores 211 begin the screw motion simultaneously, and move to the both ends of the rolling brush body 1 respectively, can shorten outer core 21 drawing of patterns time on the unchangeable basis of the length of the rolling brush body 1, improve production efficiency.

In addition, the groove-forming ribs 2111 and the depression-forming ribs 2123 on the two first outer cores 211 may be different, so that the formed groove 111 and the depression 117 have two different helical parameters.

Correspondingly, the inner core 22 comprises two inner mandrels 221, and the two inner mandrels 221 can be spliced in the axial direction. In the inner core demoulding step, the two inner mandrels 221 start to perform spiral motion simultaneously and move towards the two ends of the rolling brush body 1 respectively, so that the demoulding time of the inner core 22 can be shortened on the basis of unchanging the length of the rolling brush body 1, and the production efficiency is improved.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A rolling brush body for mounting cleaning elements (2) to form a rolling brush, characterized in that the rolling brush body comprises a hollow cylinder (11), a helical structure is arranged on the outer wall of the cylinder (11), the helical structure is used for mounting the cleaning elements (2), the helical structure extends spirally around the axis of the cylinder (11), the number of the helical structure is at least three and/or the rotation angle of the helical structure around the axis of the cylinder (11) is not less than 180 degrees.

2. The brush roll according to claim 1, wherein the spiral structure is a spirally extending depression (17) or a spiral protrusion;

preferably, the helical structure comprises a first helical section and a second helical section connected, the helical parameters of the first helical section and the second helical section being different;

preferably, the helical parameters include a pitch, a helix angle and/or a helical direction.

Preferably, the first helical section and the second helical section have opposite helical directions.

3. A roller brush body according to claim 1 or 2, wherein the roller brush body is injection moulded, the outer profile surface of the roller brush body comprising a first moulding surface (114) and a second moulding surface (115) which are connected, the connection of the first moulding surface (114) and the second moulding surface (115) forming a pinch line;

preferably, the second molding surface (115) is provided with a plurality of sections, a plurality of second molding surfaces (115) are arranged at intervals along the circumferential direction of the rolling brush body, and the first molding surface (114) is connected with the plurality of second molding surfaces (115);

preferably, the second molding surfaces (115) are provided with a plurality of sections, a plurality of the second molding surfaces (115) are arranged and connected along the circumferential direction of the rolling brush body, the plurality of the second molding surfaces (115) are connected with the first molding surface (114), and the clamping line is arranged between the adjacent second molding surfaces (115);

preferably, the rolling brush body comprises two sections of the first molding surfaces (114), the second molding surface (115) is positioned between the two sections of the first molding surfaces (114) and is respectively connected with the two sections of the first molding surfaces (114), and the connecting part of the second molding surface (115) and each first molding surface (114) is provided with the clamping line;

preferably, the wire clamping comprises a first wire segment (112) and a second wire segment (113) extending along the circumferential direction of the cylinder (11), the first wire segment (112) and the second wire segment (113) form an included angle, and the end part of the first wire segment (112) is connected with the second wire segment (113);

preferably, the first line segment (112) is parallel to the helix direction of the helix;

preferably, two of said first line segments (112) and two of said second line segments (113) are alternately connected to enclose said second forming surface (115), said second forming surface (115) being located on or beside said helical structure.

4. The rolling brush body according to claim 1 or 2, wherein the spiral structure is a spirally extending depression (117), the depression (117) being formed by an inner recess of an outer wall of the cylinder (11);

preferably, the opening of the recess (117) gradually increases along the radial direction of the cylinder (11) to the axial direction away from the cylinder (11);

preferably, the cross-sectional shape of the recess (117) is V-shaped, trapezoidal or arc-shaped;

preferably, a first rib (13) spirally extends from the position, corresponding to the concave part (117), on the inner wall of the barrel (11), and the concave part (117) is recessed into the first rib (13);

preferably, a reference blind hole is arranged on the outer wall of the cylinder (11) at a position corresponding to the first rib (13), and the reference blind hole can be processed into a hair planting hole (1171);

preferably, the blind reference holes are provided in plurality, and the blind reference holes are arranged along the spiral direction of the first rib (13).

5. The rolling brush body according to claim 1 or 2, wherein the inner wall of the barrel (11) is provided with a second rib (12) protruding towards the inside of the barrel (11) and extending spirally, the barrel (11) is recessed inside the second rib (12) corresponding to the outer wall of the second rib (12) to form a spirally extending groove (111), the groove (111) has a first width and a second width arranged from inside to outside along the radial direction of the barrel (11), and the first width is larger than the second width;

preferably, the shape of the groove (111) extending into the second rib (12) is matched with the shape of the second rib (12);

preferably, the wall thickness of the rolling brush body is 2-4 mm;

preferably, the second ribs (12) and the spiral structures are alternately arranged along the circumferential direction of the cylinder (11) and are uniformly distributed at intervals, and the grooves (111) are arranged on the outer wall of the cylinder (11) at positions corresponding to each second rib (12).

6. A roller brush body according to claim 1 or 2, wherein the outer diameter of the cylinder (11) is 40mm to 60 mm.

7. A roller brush, characterized in that it comprises a cleaning member (2) and a roller brush body according to any one of claims 1-6, said cleaning member (2) being mounted on said spiral structure.

8. A dust extraction apparatus comprising a floor brush assembly (110), characterized in that the floor brush assembly (110) comprises a housing and a roller brush according to claim 7, which is rotatably arranged in the housing.

9. A method for forming a rolling brush body, which is applied to an injection mold for processing the rolling brush body according to any one of claims 1-6, wherein the rolling brush body is formed by injection molding with the injection mold, the injection mold comprises an outer core (21) and an inner core (22) arranged in the outer core (21), a forming cavity is formed between the inner core (22) and the outer core (21) when the inner core and the outer core are in a forming position, and a first spiral forming structure for forming the spiral structure is arranged on the outer core (21);

the molding method comprises the following steps:

an injection molding step of injecting an injection molding material into the molding cavity to form the roller brush body having a hollow cylinder (11) in the molding cavity;

10. The method of claim 9, wherein the outer core (21) comprises a first outer core (211) and a second outer core, the second outer core comprises at least two clamping portions (212) arranged along the circumferential direction of the rolling brush body, the first spiral forming structure is arranged on the inner wall of the first outer core (211) and/or on the clamping portions (212), and the clamping portions (212) and the first outer core (211) are spliced to form the outer core (21) when in the forming position; when a formed rolling brush body is formed in the forming cavity, at least two clamping parts (212) clamp the rolling brush body;

the demolding step comprises:

a first outer core mold release step of spirally moving the first outer core (211) around an axis of the roll brush body to be detached from the roll brush body;

an inner core demolding step of detaching the inner core (22) from the roll brush body;

a second outer core demolding step of separating at least two of the clamping portions (212) from the roller brush body in a radial direction of the roller brush body to be separated from the roller brush body;

preferably, the outer core (21) comprises two first outer cores (211), the clamping part (212) is positioned between the two first outer cores (211) and can be spliced with the two first outer cores (211) respectively;

in the first outer core demoulding step, the two first outer cores (211) simultaneously perform spiral motion and respectively move towards two ends of the axis of the rolling brush body;

preferably, a second spiral forming structure is arranged on the outer wall of the inner core (22), and the inner core demoulding step specifically comprises the following steps:

the inner core (22) is spirally moved around the axis of the rolling brush body to be disengaged from the rolling brush body;

preferably, the inner core (22) comprises two inner mandrels (221), the two inner mandrels (221) being axially splittable;

in the inner core demoulding step, the two inner mandrels (221) simultaneously perform spiral motion and respectively move towards two ends of the axis of the rolling brush body;

preferably, the injection molding step further comprises:

a mold clamping step of moving the inner core (22) and the outer core (21) to be in a molding position;

preferably, the injection molding step further comprises:

a mold closing step, wherein the mold closing step comprises:

at least two of the clamping portions (212) are close to each other until the clamping portions (212) move to the forming positions thereof;

the first outer core (211) moves spirally until the first outer core (211) is spliced with the clamping part (212) to form the outer core (21), and the inner core (22) is inserted into the outer core (21) until the molding cavity is formed.