Device and process for bonding wearing parts on an excavator
AssigneeAfe Metal
InventorsCharles Pasqualini, Jean Marc Pasqualini, Sylvain Pasqualini
Life of this patent
Estimating the term…
Abstract
The device is distinctive in that tooth (D) and matching adapter (A) are both designed with matching shapes to allow, after assembly, the formation and definition of one or more spaces (V) of variable shape, as appropriate, the adapter and tooth being made with one or more openings allowing the filling and application of a special-purpose material (M) in the above-mentioned space(s), said special-purpose material fulfilling the functions of locking the tooth relative to the adapter by absolute contact between the tooth and adapter by forming a contact cushion that ensures distribution of the stresses and strains in all the areas filled by the material.
Claims17
For an excavator having wearing parts, including removable teeth and adapters on the ends of tools and receptacles used thereon, a bonding combination in which each said tooth includes a hollow internal shape and a contact surface, each said adapter having a tip having a shape allowing said tip to fit into a said tooth and a contact surface, said combination including an elastic filler material being placed in at least one area between a said tooth and a said adapter in order to provide at least one contact cushion to ensure distribution of stresses and strains, wherein the tooth and adapter are made with at least one pair of matching shapes to constitute areas for filling, accommodating, containing and removing said elastic filler material applied after prior assembly of the tooth on the adapter in order to provide, at least in the contact area, absolute contact between the tooth and adapter, allowing the adapter to withstand stresses and strains over larger surface areas, the elastic filler material being capable of deformation and in that the matching shapes are located proximate and in connection with the areas for filling the elastic filler material and in that the elastic filler material is fluid as applied and is capable of solidification such that as it solidifies, the filler material bonds and secures the tooth and the adapter and in that the configuration of the areas intended for filling and containing the elastic filler material have the function of fixing at least one sufficiently capable mass of elastic filler material of a volume sufficiently capable of compressing and expanding during transmission of multidirectional mechanical stresses exerted on the tooth to the adapter during operation of the excavator such that the tooth can move relative to the adapter.
A bonding assembly in combination with a shield and a bucket lip used in an excavator, wherein said bucket lip includes an upper surface with a circular bearing surface that can be inserted into an internal cavity formed in an upper part of the shield, said cavity communicating with an opening in said shield which allows filling by an elastic filler material, said cavity being shaped to allow the insertion of a substantially semi-circular through key of tapered cross section, said key having a heel that fits in a hollow area formed in the cavity.
A process for bonding teeth and adapters used on an excavator, including the steps of:
- placing a tooth on an adapter in contact, without any attempt to obtain any particular fitting level;
- inserting a key between the tooth and the adapter, the key becoming joined to the tooth;
- and
- applying elastic filler material by pouring said elastic filler material between the adapter and the key, said elastic filler material being capable of deformation such that the adapter and tooth can move relative to one another.
A process for bonding teeth and adapters used on an excavator including the steps of:
- placing a tooth on an adapter and in contact therewith;
- inserting an insert into a space defined in the adapter;
- and
- applying an elastic filler material between the adapter and the tooth such that the insert fulfills the function of reinforcing the elastic filler material which acts as a key, and allowing the tooth and adaptor can move with respect to one another, said insert making it possible to remove the material from the space for retaining the tooth on the adapter when there is a need to change the tooth.
A process for bonding teeth with corresponding adapter elements, including the steps of:
- placing a tooth on an adapter;
- applying an elastic filler material originally in a liquid state by pouring said material between the adapter and the tooth into a space defined between the tooth and the adapter, said elastic filler material being capable of deformation so that it can subsequently fill the space in a solid state and thereby lock the tooth and the adapter together while allowing for relative movement of the tooth with the adapter.
Dependencies are inferred from the claim text.