WO2010071436A1 - Méthode de fabrication d'un logement - Google Patents

Méthode de fabrication d'un logement Download PDF

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Publication number
WO2010071436A1
WO2010071436A1 PCT/NL2009/050784 NL2009050784W WO2010071436A1 WO 2010071436 A1 WO2010071436 A1 WO 2010071436A1 NL 2009050784 W NL2009050784 W NL 2009050784W WO 2010071436 A1 WO2010071436 A1 WO 2010071436A1
Authority
WO
WIPO (PCT)
Prior art keywords
model
housing
mould
wax
coupling
Prior art date
Application number
PCT/NL2009/050784
Other languages
English (en)
Inventor
Teun Johan Hugo Leende Sanders
Original Assignee
Teun Johan Hugo Leende Sanders
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teun Johan Hugo Leende Sanders filed Critical Teun Johan Hugo Leende Sanders
Publication of WO2010071436A1 publication Critical patent/WO2010071436A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60D—VEHICLE CONNECTIONS
    • B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
    • B60D1/01—Traction couplings or hitches characterised by their type
    • B60D1/06—Ball-and-socket hitches, e.g. constructional details, auxiliary devices, their arrangement on the vehicle
    • B60D1/065—Ball-and-socket hitches, e.g. constructional details, auxiliary devices, their arrangement on the vehicle characterised by the hitch mechanism

Definitions

  • the invention relates to a method of manufacturing a housing for a coupling for coupling a trailer to a tow ball.
  • the invention more particularly relates to a method of manufacturing a relatively complex housing which comprises a first chamber in which a clamping body can be displaced for clamping a ball of the ball bar and which has an opening for receiving the ball, as well as a second chamber which has a further opening for receiving a handle for displacing the clamping body, a partition wall being positioned between the two chambers.
  • a method of this type is generally known.
  • the coupling should be embodied in a more powerful or less powerful design.
  • the strength of the coupling is mainly determined by the material the coupling is made of and the wall thickness of the housing of the coupling.
  • the housings are made from sheet portions either bent or not and welded together.
  • For each housing with a different wall thickness there should be at least one piece of tool present attuned to this wall thickness.
  • the cost price would become too high, so that couplings of this type are not available for the entire range.
  • the method according to the invention is characterised in that first a model of the housing is created in wax, then a mould of a refractory material is formed around this model, subsequently the mould and the model are heated so that the wax model melts and the wax flows out of the mould and the mould cures, after which the material the housing is to be made of is poured in liquid state into the mould and the mould is removed once the material has cured.
  • any desired model of housing By casting the housing with the what is called 'lost wax method' it is possible for any desired model of housing to be manufactured in a cost-covering manner.
  • a model that has a large wall thickness, of which the wall thickness can be reduced in a simple manner it may be sufficient to manufacture a single model for any desired housing.
  • the wall thickness of the model of the housing can be reduced for example by locally heating the model or by planing the walls.
  • the housing can be cast from any desired material without the need for taking notably cost increasing measures for this.
  • This is contrary to the known method in which sheet portions are to be bent and welded together.
  • this operation it is not possible without complications to process sheets of any desired material with the same tools, but different tools are needed for working with different materials.
  • the housing for a coupling for a trailer by casting it.
  • the cast housings have a relatively simple shape, so that they can be cast with a relatively cost-efficient casting process and not with the relatively expensive 'lost wax method'.
  • no housings with different wall thicknesses are cast for these known housings, so that housings cannot be manufactured for a wide range of applications.
  • An additional advantage of this casting method is that after the casting operation there is no stress left in the housing, so that critical portions can be manufactured with higher accuracy and fewer or no finishing operations need be carried out to reach the desired accuracy.
  • various component parts may be integrated with the housing so that the coupling may be composed of fewer parts, which in its turn is cost-saving as a result of which the method according to the invention is even more economically justified, whereas it did not seem to be in the first instance.
  • An embodiment of the method according to the invention is characterised in that after the wax model of the housing has been created, the wall thickness of the model is reduced where necessary before the mould around the model is made.
  • Fig. 1 shows a coupling provided with a housing which is cast according to the invented method
  • Fig. 2 shows the cast housing for the coupling shown in Fig. 1.
  • Fig. 1 shows a coupling 1 which is provided with a housing 3 which is cast according to the invented method.
  • the housing 3 (see also Fig. 2 showing the housing separately) has a first chamber 5 in which a clamping body 7 is slidable for clamping a ball 9 of the ball bar.
  • the bottom 11 of this chamber has an opening 13 for receiving the ball.
  • the housing 3 further has a second chamber 15. In the upper wall 17 of this chamber there is a further opening 19 for receiving a handle 21 for displacement of the clamping body 7.
  • a partition wall 23 is positioned between the two chambers 5 and 15.
  • the housing 3 is cast according to the what is called 'lost wax method'.
  • a model of the housing is created in wax.
  • a mould of refractory material is formed around this model.
  • the model and the mould are heated and the wax model melts and the wax flows out of the mould and the mould cures.
  • the material the housing is made of is poured in liquid state into the mould. Once the material has cured the mould is removed in the end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Un logement (3) d'attelage de remorque est moulé selon la méthode dite "de la cire perdue". La méthode comporte les étapes suivantes: création d'un modèle de cire du logement; formation d'un moule de matériau réfractaire autour du modèle; chauffage du moule et du modèle pour que la cire fonde et s'écoule hors du moule et que le moule durcisse; coulage dans le moule du matériau à l'état liquide dont sera fait le logement; et finalement élimination du moule après durcissement dudit matériau. Ladite méthode permet de fabriquer un modèle pour toute épaisseur souhaitée de la paroi du logement. En partant d'un modèle à paroi de forte épaisseur, cette épaisseur peut être réduite en chauffant localement le modèle ou en aplanissant localement ses parois. Le logement de l'attelage peut ainsi être moulé de sorte que les frais soient couverts.
PCT/NL2009/050784 2008-12-18 2009-12-18 Méthode de fabrication d'un logement WO2010071436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2002339 2008-12-18
NL2002339 2008-12-18

Publications (1)

Publication Number Publication Date
WO2010071436A1 true WO2010071436A1 (fr) 2010-06-24

Family

ID=41650299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2009/050784 WO2010071436A1 (fr) 2008-12-18 2009-12-18 Méthode de fabrication d'un logement

Country Status (1)

Country Link
WO (1) WO2010071436A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB744693A (en) * 1953-07-22 1956-02-15 Michael F Robertshaw Ltd Improvements in or relating to ball and socket hitches particularly for trailer vehicles
US6464241B1 (en) * 2000-11-22 2002-10-15 Jeffrey Daniel Gooseneck trailer hitch
EP1284206A1 (fr) * 1999-04-30 2003-02-19 Josef Scharmüller Dispositif d'attelage entre un véhicule tracteur, en particulier un tracteur agricole, et une remorque

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB744693A (en) * 1953-07-22 1956-02-15 Michael F Robertshaw Ltd Improvements in or relating to ball and socket hitches particularly for trailer vehicles
EP1284206A1 (fr) * 1999-04-30 2003-02-19 Josef Scharmüller Dispositif d'attelage entre un véhicule tracteur, en particulier un tracteur agricole, et une remorque
US6464241B1 (en) * 2000-11-22 2002-10-15 Jeffrey Daniel Gooseneck trailer hitch

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