Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/02—Rotary receptacles, e.g. drums
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/02—Rotary receptacles, e.g. drums
  • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/26—Casings; Tubs
  • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
  • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding

Definitions

• the present invention encompasses in the field of washing machines, in particular in the field of their components, such as the drum.
• Said invention is a drum assembly for washing machine comprising a drum, a support assembly thereof and fixing means between them.
• the present invention solves the disadvantages of the state of the art and covers the need for washing machine components that resist mechanical stress and chemical attack.
• the object of the invention is a drum assembly for washing machine with drum and support assembly thereof which is an alternative to aluminum alloy and withstands the mechanical stress and chemical attack suffered by washing machine drums.
• the technical problem to be solved is to configure the components mentioned to achieve the object of the invention.
• star support that includes arms, it is intended to specify that the arms are equidistant from each other, that is, they are divided along the circumference, as in a star with
• An advantage of the invention in relation to claim 1 is that it more than meets the object of the invention since the arrangement and configuration of the metal core in conjunction with the plastic coating has a greater resistant modulus than the same aluminum alloy assembly, with that better withstand alternating stress and less deformation.
• the encapsulation avoids any contact of the metal core with the detergents with chlorinated water at high temperature, thereby preventing corrosion unlike in the aluminum alloy of the prior art.
• Another advantage in relation to claim 2 is that it adequately resists torsional stresses.
• Another advantage in relation to claim 4 is that material is removed from an area where it is not necessary, whereby the cost of the assembly is reduced by using less plastic material and the assembly is also lightened.
• Another advantage in relation to claim 5 is that it allows a one-piece metal core to be made for two adjacent arms, making manufacturing easier, usually by stamping a metal plate.
• Another advantage in relation to claim 6 is that the shaft joint is reinforced with which it better resists the transmission of the torque that it receives and passes to the support assembly.
• Another advantage according to claim 7 is that it resists torsional stresses on the shaft for any drum condition and load.
• Another advantage in relation to claim 8 is that the attachment of the shaft to the metal core is facilitated.
• plastics already used in other components of the washing machines are used in the coating and that they can include degrees resistant to the attack of detergents and chlorinated water at high temperature.
• Another advantage in relation to claim 12 is that the fixation is not affected by the relaxation phenomenon and the screws do not need a self-braking additive as occurs in the aluminum alloy of the prior art.
• Figure 1 represents a rear perspective view of the drum assembly.
• Figure 2 represents a section showing in detail the fixing means of a support arm to the drum of the drum assembly of Figure 1.
• Figures 3A-3C represent a perspective view of the support assembly, of the drum assembly of Figure 1, formed by a star support of 3, 6 and 8 arms respectively.
• Figure 4 represents a perspective view of an exploded drum assembly of Figure 1.
• Figure 5 represents an elevation view of the metal core of the star support.
• Figure 6 represents an elevation view of the star support.
• Figure 7 represents a cross section of an arm of the star support, related to the section VII of figure 6.
• Figure 8 represents a longitudinal section of the support assembly, related to section VIII of Figure 6.
• Figure 9 represents a perspective view of the shaft welded to the metal core.
• Figure 10 represents a perspective view of the shaft with broaching areas practiced at its end where it joins the metal core.
• Figure 1 shows, as is known in the state of the art, a drum assembly for
• washing machine comprising:
• -a drum (1) which in turn comprises a cylindrical side wall (1.1) and a rear wall (1.2) covering one of the faces of the cylindrical side wall
• -a support assembly (2) which in turn comprises a star support (2.1) with at least three arms (2.1.1) whose ends form the main plane of the support assembly (2), and an axis (2.2) fixed on the center of the support (2.1) and perpendicular to said plane
• the arms (2.1.1) of the support (2.1) are fixed to an edge of the cylindrical wall (1.1) protruding from the rear wall (1.2) of the drum (1 ), however, with simple obvious changes, it could be foreseen that the fixation of said arms (2.1.1) is carried out to the rear wall itself (1.2).
• a preferred embodiment of the star support (2.1) with 3 arms (2.1.1) is shown in Figures 1, 3A and 4, however, they could be used
• Figures 4 to 8 show that the star support (2.1) also comprises a metal core (2.1.2) encapsulated by overinjection of a
• said metal core (2.1.2) comprises, for each arm (2.1.1), two plates (2.1.4) arranged transversely with respect to the main plane of the support assembly (2), that is, the plates (2.1.4) extend radially in the star support (2.1) with the larger sides of their cross section arranged parallel to the axis (2.2).
• Each plate (2.1.4) on each arm (2.1.1) has a central part (2.1.5) that hugs a portion of the shaft (2.2) followed by a first section (2.1.6) that extends into each arm ( 2.1.1) up to a second section (2.1.7) as a continuation of the first, the axis (2.2) is fixed by plastic coating (2.1.3).
• the star support (2.1) forms a diameter between a minimum of 300 mm and a maximum of 600 mm. This makes that, next to the fixing means
• the second sections (2.1.7) of the plates (2.1.4) are more separated from each other than the first sections (2.1.6 ). Specifically, it is verified that the separation (if) between the first sections (2.1.6) of the plates (2.1.4) can be between 10 and 40 mm, and the separation (s2) between the second sections (2.1.7 ) of the plates (2.1.4) can be between 40 and 200 mm. As shown in Figure 5, the transition between the first (2.1.6) and second tranche (2.1.7) can be done by a smooth transition, that is, rather curved
• Figure 8 shows a longitudinal section of an arm (2.1.1), whose profile is inclined, and can have a height between the highest and lowest part of between 20 to 100 rom, although it could also be the straight profile. Small heights are conducive to more compact support sets (2) but with less moment of inertia, more
• each arm (2.1.1) has a recess
• plastic coating (2 1.3) a knurling (2.2.1) with teeth height between 2 and 4 rom.
• the shaft (2.2) has a broaching (2.2.2) in the central part (2.1.5), that is, in the areas where said central parts (2.1.5) of the plates (2.1.4) are fixed to the axis
• FIG. 10 shows the axis (2.2) with two broaches (2.2.2), however, said axis (2.2) could comprise up to 8 broaches (2.2.2), by
• the plates (2.1.4) have a thickness between 1 and 5 rom. In the case of wanting to lighten the weight of the plates (2.1.4) they could be done
• plastic coating (2.1.3) is reinforced with fibers, the plastic being one selected from PP (polypropylene), PPS
• the fibers are of a material selected from glass, calcium and carbon.
• the fibers can be short, medium or long, of
• the fixing means (3) comprise at least one threaded hole (3.1) in the plastic covering (2.1.3) of each arm (2.1.1) and a screw ( 3.2) with steak angle with self-retention.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=58050662

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (4)

Family Cites Families (6)

• 2015
  • 2015-08-19 EP EP15901664.1A patent/EP3339491A4/de not_active Withdrawn
  • 2015-08-19 WO PCT/ES2015/070627 patent/WO2017029416A1/es active Application Filing

Patent Citations (4)

Non-Patent Citations (1)

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