EP2002144A2 - Contrepoids - Google Patents

Contrepoids

Info

Publication number
EP2002144A2
EP2002144A2 EP07747272A EP07747272A EP2002144A2 EP 2002144 A2 EP2002144 A2 EP 2002144A2 EP 07747272 A EP07747272 A EP 07747272A EP 07747272 A EP07747272 A EP 07747272A EP 2002144 A2 EP2002144 A2 EP 2002144A2
Authority
EP
European Patent Office
Prior art keywords
weight
fastener
mould
positioning
plastic body
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07747272A
Other languages
German (de)
English (en)
Inventor
Anouska Eunice Sharmila Meghoe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fastron BV
Original Assignee
Fastron BV
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 Fastron BV filed Critical Fastron BV
Publication of EP2002144A2 publication Critical patent/EP2002144A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • F16F15/324—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels the rotating body being a vehicle wheel

Definitions

  • the invention pertains to a method to manufacture a device for balancing a vehicle wheel; this device comprises a fastener for attaching and fixing the device to the vehicle wheel, a plastic body and a weight.
  • the invention also pertains to such a device.
  • the invention further pertains to moulds to manufacture such a device.
  • a device for balancing a vehicle wheel is known. Such a device is also called a balance weight.
  • a balance weight is used to dynamically or statically balance a vehicle wheel of, for instance, an automobile, truck, motorcycle or the like. An unbalanced rotating wheel can cause vibrations which can damage the vehicle, have an adverse effect on the performance of the vehicle and adversely affect the comfort of the driver and the passengers.
  • a balance weight for vehicle wheels in principle consists of a weight and means to attach and fix the weight on or onto a portion of the wheel, such as the wheel rim or a spoke, for instance. In the past, the choice of materials was limited by legislation and regulations; the weight of the balance weight was usually made of lead or lead alloys.
  • Lead and some lead alloys have a relatively high specific gravity and possess rheological properties that are well suited to the intended application. Their rigidity, for instance, is such that when subjected to the customary clamping forces, the shape of the contact surface of the balance weight can adapt, to some extent, to the contour of the wheel rim. Moreover, the hardness of lead and some lead alloys is low compared to that of the material from which the wheel is constructed. This reduces the probability of the contact surface of the wheel becoming damaged during the installation or removal of the balance weight. Furthermore, there is only a slight probability of electrolytic corrosion when using lead or lead alloys on metal wheel rims or spokes. Because of their toxic properties, the use of lead and lead alloys is no longer allowed in many countries. This has resulted in the development of lead-free balance weights.
  • a disadvantage of zinc is that it is relatively expensive compared to iron and iron alloys.
  • US 6250721 describes a balance weight made of iron. Iron and iron alloys are relatively hard compared to lead and zinc alloys and are difficult to deform while attaching them to the wheel rim. This gives rise to peak stresses along the contact surface between the balance weight and the wheel rim, which can result in damage to the wheel rim. This applies particularly to light-alloy wheel rims that are less scratch-resistant than steel wheel rims.
  • EP0990096 Bl describes a balance weight consisting of a fastener, in the form of a metal clip, for clamping the balance weight onto the wheel rim, and a weight made of glass, porcelain or ceramic. These materials are not deformable under the clamping forces commonly used and will not adapt themselves to the contour of the wheel rim. When there are hollow spaces along the contact surfaces between the balance weight and the wheel rim, moisture and solid particles can accumulate and promote corrosion.
  • US2004256909 describes a balance weight consisting of a fastener, of which the shape of the hook portion has been matched to the shape of the edge of the wheel rim, and a plastic body that is injection moulded to the leg portion of the fastener.
  • the plastic body has a hollow cavity in which a weight, such as a bar made of tungsten for instance, can be positioned and fixed.
  • a weight such as a bar made of tungsten for instance
  • the advantage of tungsten is that it has a relatively high specific gravity but its disadvantage is the relatively high price of the raw material.
  • the manufacturing costs of the balance weight are relatively high.
  • WO2004025139 describes a balance weight that is entirely or partially encased in a coating.
  • One of the purposes of the coating is to prevent the wheel rim from becoming damaged during the fixing and removal of the balance weight and to counteract electrolytic corrosion.
  • a disadvantage of this device is that the application of a coating requires an additional operation that makes the manufacturing process more expensive.
  • EP 1079141 describes a balance weight of which the leg portion of the fastener is connected to a body made of a mixture of a synthetic resin and tungsten powder. It takes advantage of the relatively high specific gravity of tungsten. Mixing the tungsten particles with the much lighter synthetic resin cancels out some of this advantage though.
  • tungsten — whether or not in powder form — is a relatively expensive raw material.
  • the purpose of the present invention is to provide an inexpensive device for balancing a vehicle wheel by making use of inexpensive raw materials and an inexpensive method for manufacturing the device. Summary of the invention
  • the invention provides a method for manufacturing a device for balancing a vehicle wheel; this device comprises a fastener for attaching and fixing the device to the vehicle wheel, a plastic body and a weight, characterised in that the method also comprises placing at least part of the fastener in a mould, placing the weight in the mould and introducing a plastic material into the mould.
  • the advantage of this method is that by introducing a plastic material into the mould, a plastic body is created that connects the fastener to the weight while also encasing the weight in the plastic material. In this manner, two manufacturing steps, involving connecting the fastener to the weight and encasing the weight, are combined.
  • the mould can be provided with positioning aids.
  • the fastener and the weight can also be provided with positioning aids. Using these positioning aids, the weight and the plastic body can be positioned relative to the fastener in a manner that can be reproduced and that meets the desired accuracy.
  • the fastener and the weight can also be provided with positioning aids for positioning the fastener and the weight relative to each other. Positioning the fastener and the weight relative to each other is used for an embodiment of the method in which the fastener and the weight are placed in the mould as an assembly.
  • the invention also provides for a device for balancing a vehicle wheel; this device comprises a fastener for attaching and fixing the device to the vehicle wheel, a plastic body and a weight, characterised in that the fastener is attached to the weight solely by means of the plastic body. In this case, no additional means needs to be added or action undertaken to connect the fastener and the weight to each other or to connect the fastener and the weight to the plastic material.
  • the fastener and the weight are positioned relative to each other in such a manner that they do not touch.
  • This embodiment of the device results in a large contact surface between the fastener and the weight on the one hand and the plastic body on the other.
  • this embodiment of the device elirninates the possibility of electrolytic corrosion as a result of contact between the fastener and the weight.
  • the weight is encased entirely or almost entirely in the plastic body. This prevents damage to the edge of the wheel rim and corrosion of the weight.
  • the invention also provides moulds for manufacturing a device for balancing vehicle wheels; this device comprises a fastener for attaching and fixing the device to the vehicle wheel, a plastic body and a weight, characterised in that each mould is equipped with positioning aids for positioning the fastener and/or the weight.
  • Figure 1 is a perspective view of a device for balancing a vehicle wheel based on prior art technology
  • Figure 2 is a cross sectional view of this device
  • Figure 3 is a cross sectional view of a device for balancing a vehicle wheel according to a non-limiting example of an embodiment of the invention.
  • FIGS 1 and 2 show a known device 1 for balancing a vehicle wheel.
  • This device 1 consists of a fastener 2 and a weight 3.
  • the fastener 2 serves to attach and fix the device 1 to an unspecified edge of the wheel rim.
  • the fastener 2 is provided with a hook portion 4, the shape of which corresponds to the shape of the edge of the wheel rim.
  • the weight 3 is injection moulded and fixed to the leg portion 5 of the fastener.
  • Figure 3 shows a device 6 according to a non-limiting embodiment of the invention, made up of a fastener 2, a weight 8 and a plastic body 7.
  • a method in accordance with the invention also comprises placing at least part of the fastener 2 in an unspecified mould, placing the weight 8 in the mould and introducing a plastic material 7 into the mould.
  • the fastener 2 and the weight 8 are placed in the mould independently of each other in either an arbitrary or a fixed sequence. In doing so, use is made of unspecified positioning aids that have been affixed to the fastener 2 and/or to the weight 8 and/or to the mould.
  • the fastener and the weight are then fixed in their relative positions. The fixing can, for instance, be achieved by placing the two mould halves against each other and connecting the two mould halves together.
  • a plastic material is injected into the mould by means of injection moulding, whereby the leg portion 5 of the fastener 2 is connected to the weight 8 by means of the plastic material and whereby the weight 8 and at least part of the fastener 2 are encased in the plastic material.
  • unspecified sections, apertures and/or notches may have been made in the leg portion 5.
  • the fastener 2 and the weight 8 are placed in the mould as an assembly.
  • the weight 8 is first fixed to the leg portion 5 of the fastener 2 in a manner that allows the assembly of the fastener 2 and the weight 8 to be placed in the mould without any change in the position of the weight 8 relative to the fastener 2.
  • the fastener 2 and the weight 8 can be clamped together in some simple manner.
  • the fastener 2 and the weight 8 are positioned in the mould in such a manner that they do not touch each other.
  • the weight 8 can also be placed in the mould in such a manner that the weight does not touch the inside wall of the mould. This is, for instance, possible by using positioning aids that are placed between the weight 8 and the inside wall of the mould; these positioning aids are made of the same material as that of the plastic body 7. In this manner the weight 8 will become completely encased in the plastic body 7 formed after the introduction of the plastic material, while contact with the outside air or the wheel rim is avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Testing Of Balance (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un dispositif d'équilibrage de roue de véhicule ; ce dispositif comprend un système de fixation permettant d'attacher et de fixer le dispositif à la roue de véhicule, un corps plastique et un poids, caractérisé en ce que le procédé consiste également à placer au moins une partie du système de fixation dans un moule, à disposer le poids dans le moule et à injecter un matériau plastique dans le moule. L'invention concerne également un dispositif d'équilibrage de roue de véhicule ; ce dispositif comprend un système de fixation permettant d'attacher et de fixer le dispositif à la roue de véhicule, un corps plastique et un poids, caractérisé en ce que le système de fixation est fixé au poids uniquement par le biais du corps plastique. L'invention concerne également un moule pour fabriquer un dispositif d'équilibrage de roues de véhicule ; ce dispositif comprend un système de fixation permettant d'attacher et de fixer le dispositif à la roue de véhicule, un corps plastique et un poids, caractérisé en ce que le moule est équipé de premiers accessoires pour le positionnement du système de fixation par rapport au moule. L'invention concerne également un moule pour fabriquer un dispositif d'équilibrage de roues de véhicule ; ce dispositif comprend un système de fixation permettant d'attacher et de fixer le dispositif à la roue de véhicule, un corps plastique et un poids, caractérisé en ce que le moule est équipé de seconds accessoires pour le positionnement du système de fixation par rapport au moule.
EP07747272A 2006-04-04 2007-03-29 Contrepoids Withdrawn EP2002144A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1031510A NL1031510C2 (nl) 2006-04-04 2006-04-04 Werkwijze en matrijzen voor het vervaardigen van een inrichting voor het balanceren van een voertuigwiel, tevens zo een inrichting.
PCT/NL2007/000090 WO2007114690A2 (fr) 2006-04-04 2007-03-29 contrepoids

Publications (1)

Publication Number Publication Date
EP2002144A2 true EP2002144A2 (fr) 2008-12-17

Family

ID=37441875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07747272A Withdrawn EP2002144A2 (fr) 2006-04-04 2007-03-29 Contrepoids

Country Status (3)

Country Link
EP (1) EP2002144A2 (fr)
NL (1) NL1031510C2 (fr)
WO (1) WO2007114690A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7566101B2 (en) 2002-07-15 2009-07-28 Hennessy Industries, Inc. Vehicle wheel balance weights
DE102010008657A1 (de) * 2010-02-20 2011-08-25 Fischer, Erika, 73235 Keramisches Auswuchtgewicht
DE202011110162U1 (de) 2010-04-16 2013-03-18 Lama D.D. Dekani Verbesserungen bei Radgewichten
AT510672B1 (de) * 2010-10-15 2012-09-15 Pucher Anton Ing Ausgleichsmasse zum auswuchten eines fahrzeugrades
WO2012119236A1 (fr) * 2011-03-08 2012-09-13 Plombco Inc. Masse d'équilibrage de roue surmoulée
USD737116S1 (en) 2012-03-08 2015-08-25 Plombco Inc. Wheel-securing clip
EP2735763B1 (fr) * 2012-11-23 2017-08-09 WEGMANN automotive GmbH & Co. KG Poids d'équilibrage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4379596A (en) * 1979-09-14 1983-04-12 Speed Clip Manufacturing Corp. Superpositioned vehicle wheel balance weights and method
HU223041B1 (hu) 1997-06-27 2004-03-01 István Polyvás Keréksúly gépjárműkerék kiegyensúlyozásához
EP1069340B1 (fr) 1999-07-15 2004-04-14 Topy Kogyo Kabushiki Kaisha Masse d'équilibrage pour roue de véhicule
ATE227398T1 (de) 1999-08-20 2002-11-15 Sumitomo Rubber Ind Radauswuchtgewicht
EP1302695A1 (fr) * 2001-10-11 2003-04-16 BW Manufacturing Limited Ensemble masse d'équilibrage
FR2844322B1 (fr) 2002-09-10 2006-02-10 Fonderie De Gentilly Dispositif d'equilibrage en zinc ou alliage de zinc pour roue, jeu de tels dispositifs, roue equipee d'un tel dispositif et un procede de fabrication
US6948781B2 (en) 2003-06-23 2005-09-27 Joseph Sery Balance weight assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007114690A3 *

Also Published As

Publication number Publication date
WO2007114690A3 (fr) 2007-11-29
WO2007114690A2 (fr) 2007-10-11
NL1031510C2 (nl) 2007-10-05

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