FR2485127A1 - COUPLING SYSTEM FOR HOUSEHOLD APPLIANCES DRIVEN BY AN ELECTRIC MOTOR - Google Patents

Abstract

THE INVENTION RELATES TO A COUPLING SYSTEM FOR HOUSEHOLD APPLIANCES DRIVEN BY AN ELECTRIC MOTOR. IN THEIT SYSTEM, A SNAP 1 UNIT INCLUDES EXTERNAL PERIPHERAL 2 RIBS EXTENDING RADIALLY AND AXIALLY ORIENTED. THESE RIBS 2 CAN BE CENTERED SYMMETRICALLY ON THE BODY 3 OF THE COUPLING SYSTEM 16 AND THEY PRESENT, IN THE AXIAL SENSE, A LENGTH SMALLER THAN THAT OF THE ENVELOPE 11 OF THE SAID BODY 3 OF THE COUPLING SYSTEM. APPLICATION ESPECIALLY TO DOMESTIC MIXERS.

Description

2485,127

  The present invention relates to a coupling system for household appliances driven by an electric motor, in particular for domestic mixermixers in which the drive mechanism and the mixing vessel or bowl are removably connected by means of a nestable coupling. , in order to disassemble said mixing bowl

  said drive mechanism, and wherein the drive unit

  limp is embedded in a plastic or in rubber. Such interlocking coupling systems are known. There is known, for example, an octagonal coupling element which is embedded in rubber. In this case, the octagon sections made directly from rubber, which is itself vulcanized directly on the radial periphery

of said octagonal element.

  This embodiment has the disadvantage

  deny that, as a result of the forces exerted qt that are transmitted from the mixed material to the housing of the coupling,

  through the mixer blade and the compression shaft.

  table, the rubber noses are highly stressed in flexion and thrust. This type of stress that is harmful to rubber leads to premature deterioration of the housing of the interlocking coupling, in particular as a result of thermal stresses occurring when the device

is heated in service.

  To overcome the aforementioned drawback, the present invention relates to a coupling system which, while

  retaining its classical form, prevents a

deterioration.

  According to the essential characteristics of the

  In accordance with the invention, the interlocking unit comprises radially axially oriented and axially extending peripheral external ribs.

  In another embodiment according to the

  vention, it is advantageous for the ribs to be centrally centered

  metrically on the body of the coupling system or else

  they are offset symmetrically on said body.

  In an alternative embodiment, the ribs are shorter, in the axial direction, than the body envelope

of the coupling system.

  In the embodiment proposed by the

  vention, it is advantageous that the ribs extend up to

  the stress zone of the rubber, so that they are

  rounded on all sides by this rubber. This advantageously provides a noise attenuation or damping oscillations and shocks. This last characteristic

  greatly increases the resistance to deterioration.

  The invention will now be described more in

  detail with reference to the accompanying drawings as examples

  in which: Figure 1 is a partial diagrammatic section

  interlocking coupling system between an interlocking mechanism

  Trainer and a mixing bowl Figure 2 is fragmentary cut-to-scale

  illustrated illustrating said interlocking coupling and a part

  part of the housing of the nestable region of the latter; FIG. 3 is a plan view of a nestable portion of the coupling which is surrounded by rubber and in which ribs are symmetrically centered; and FIG. 4 is a plan sectional view of a nestable portion of the coupling which is surrounded by rubber and

  in which ribs are symmetrically offset

  is lying. Figure 1 is a section illustrating a system

  coupling device according to the invention used in metal mixers.

  langeurs, in particular those of the type in which the material to be mixed is directly heated during the stirring. A bowl

  mixer 6, fixed in a heat-conducting base 5, is placed

  with the latter on a heating plate 4. This heating plate concentrically extends around a fan

  14, at the center of which is the system of accou-

  16. This system is driven by an electric motor, of which an output shaft 13 is in the center

2485,127

  said fan (as shown in Figure 2), which

  In turn, on its other side, the coupling system 16 is fitted. In this coupling 16 is fitted an output shaft 12 driving a knife 8 which is housed in a mixing chamber 7, said shaft being connected to a device 9. The output shaft 12 is incorporated in a metal nesting unit 1 surrounded by a casing 11 of the body 3 of the coupling system. As illustrated in FIGS. 3 and 4, the coupling system 16 is mounted in the

  fan 14, in the center of the latter, with which it is

appeared by conformation.

  A square drive member 15 is depressed

  in an octagonal housing of the nesting unit 1.For

  see absorb the great forces that manifest themselves in

  mixers of this type, while causing considerable attenuation

  noises, the envelope 11 is made of natural rubber

  rel or synthetic vulcanized on the nesting unit. Under these conditions, and as mentioned above, it is necessary, in order to be able to absorb a force F, to provide reinforcement under the

  form of ribs 2, otherwise said envelope 11 is

  where the force F is applied.

  In FIG. 4, the ribs 2 of the unit of em-

  box 1 are offset with respect to the radius, which,

  that is applied the force F, increases the course of damping,

  up to ribs 2, and also has a favorable influence

  on the attenuation of noise.

  It goes without saying that many modifications can be made to the coupling system described and

  represented, without departing from the scope of the invention.

Claims (4)

  1. Coupling system for household appliances   driven by an electric motor; especially for mixed mixers   in which the driving mechanism and the mixing bowl   are connected in a removable manner by means of a coupling   housing for disassembling said bowl of said drive mechanism   and in which the nesting unit is embedded in a plastic material or in a rubber system characterized   in that said interlocking unit (1) has nipples   peripheral outer vanes (2) extending radially and oriented axially.   2. System according to claim 1, characterized in that the ribs (2) are centered symmetrically   on the body (3) of the coupling system.   3. System according to claim 1, characterized   in that the ribs (2) are offset symmetrically   on the body (3) of the coupling system.   4. System according to any one of the claims   1 to 3, characterized in that, in the axial direction, the ribs (2) are shorter than the casing (11) of the body of the coupling system.