Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
  • E02F9/2891—Tools for assembling or disassembling

Definitions

• the invention relates to the technical sector of equipment of public works machines with buckets, buckets or other receptacles likely to scrape, remove, move materials or others for their evacuation from a given place to other operating posts using public works machinery.
• connection of the teeth on their nose adapters is made by keying to allow, after wear of the teeth, to proceed with their removal and replacement.
• the horizontal, lateral, oblique or various stresses inherent to the applications and uses also cause deteriorations in the tooth-nose-adapter relationship, but also on the keying.
• a more resistant configuration is also known, as shown in FIG. 3.
• the nose of the adapter support has, in its front part, a stabilizing plate and the rear part of the adapter support comprises housings receiving the two ears of the tooth.
• the game established in the production of parts is such that J2 between the upper and lower faces of the fitting is greater than that achieved at the level of the flat stabilization and ears (Jl). J2> Jl.
• the keying systems of the teeth to ensure their retention on their adapter supports, are arranged, either vertically or horizontally. Their keys are assisted or not by an elastic element. Placed horizontally, they have the disadvantage of difficult access because of the presence too close to neighboring adapters. Placed vertically, they pre-dispose to the loss of keys, especially from the bottom.
• the first relates to a vertical key formed by two cylinders which screw on one another, one forming a bolt and the other forming a nut ( Figures 5, 6 and 7).
• a rubber tube is placed between the two.
• the rubber By screwing the two elements forming the key that come together, it tends to crush and expand the rubber tube. It is positioned in a recess provided in the body of the adapter where it can expand, harden under the screwing pressure. This ensures the retention of the key in use.
• the rubber the position of which is imposed by the recess in the adapter, places the metal elements forming a key in a random position with respect to the orifices of the tooth where they can not systematically find in rear contact position to ensure the retention of the tooth. In addition to this, there is no, practically or very little, in the case of favorable random position of the key, rear support force for the retention of the tooth.
• the second is placed horizontally ( Figures 8 and 9).
• a rubber tube is introduced into its housing in the adapter.
• a cylindrical pin forming a key is introduced through one or other of the orifices of the tooth.
• the diameter of the rod is slightly greater than the inside diameter of the rubber tube to create a clamping to ensure the holding in place of the key during service.
• US Pat. No. 4,727,663 also discloses a device for locking a removable tooth on an adapter support composed of a basket spring placed in a correspondingly shaped housing of the adaptable support, prior to the introduction of the removable tooth, with finally the introduction of a vertical cylindrical key in the orifices of the tooth and its position taken centrally in the basket spring. It is therefore a pivoting articulation device offering the possibility for the tooth to have a circular motion by patella effect enabled by the shapes conjugate tooth contact and adapter with the participation of the circular part of the basket spring.
• This device due to the concentric cylindrical configuration of the key and the zones of passage and contact with the basket spring has the consequence that there is no retaining force of the tooth tending to keep it in contact with its adapter support. .
• sandwich keys as described by the applicant, which are particularly arranged with a particular structure of two components movable relative to each other and between which is disposed an elastically deformable material.
• Such a key is described in PCT patent WO 2004/035945 of the applicant.
• This type of key is specific to a configuration of the tooth with a skirt surrounding and protecting the adapter.
• STICKEY process subject of EP Patent No. 618,334 which provides for the insertion of a key in a vertical plane, the key being tapered from top to bottom, and receiving, in a suitable room , the connecting material.
• This is in the form of a resin which solidifies by forming, after stiffening, a retaining sheath between the tooth and the adapter.
• the key is completely embedded in the connection volume between the tooth and the adapter. Specific tools are then required to proceed with its removal and / or tearing, see also heating the elastic material to make it liquid and allow the removal of the key. Faced with all these problems, the applicant's approach was to reflect on a new design of the tooth-adapter coupling that is easy to implement and that perfectly meets the various constraints.
• connection tooth-adapter This reflection was also directed to the connection tooth-adapter by the design of a specific keying device responding to the problems posed and goals sought.
• the applicant's approach has been to propose a tooth-adapter coupling assembly that can implement, independently or in combination, depending on the case and application, special provisions in the contact areas between the tooth and the nose-adapter. on the one hand, and in the introduction of a keying device, on the other hand.
• the connection between the tooth and the adapter is substantially improved by the addition of complementary contact areas for the absorption of stresses of all kinds and multi-directional.
• the new design of the keying device also contributes to the limitation of the movement between the tooth and the adapter, while avoiding, as far as it is concerned, all risks of escape, from the top or the bottom, in the nose connection. -adapteur, which is perfectly secure by leaving no possibility of inadvertent snap when used in situ.
• the coupling assembly of wear parts on support tools for equipment of public works machines of the type comprising a tooth and an adapter with a key connection is remarkable in that the tooth and the adapter are arranged with supporting profiled complementary shapes, in differentiated planes, located between their respective contact and connecting ends, said shapes being arranged symmetrically and in opposition on the upper and lower faces of the nose of the adapter and the tooth.
• the coupling assembly of wear parts on support tools for equipment of public works machines of the type comprising an assembly key between a tooth and an adapter, the key being positioned vertically, said key fitting in a receiving sleeve of elastic material, the tooth and the adapter being arranged with openings and abutment and abutment zones allowing the insertion of the key-sleeve assembly and its holding, is remarkable in that that the key is arranged with three specific areas, one intermediate to be engaged and cooperate with the sheath, another upper outlet of the sheath and being arranged with means for gripping and positioning a disassembly tool, and another lower to engage in the lower portion forming seat of the tooth, and in that the key in its intermediate portion has on its side faces a plurality of zones horizontal tool-holders extended by an alternation of hollow zones and projections capable of cooperating with a plurality of complementary raised and recessed zones established in the sleeve to ensure an adjustment and anchoring, and in that the tooth is arranged with a
• the coupling assembly of wear parts on support tools for equipment of public works machines is remarkable in that the tooth and the adapter are arranged with profiled complementary support shapes located between their respective contact and connecting ends, said shapes being arranged symmetrically and in opposition on the upper and lower faces of the nose of the adapter and the tooth, and in that the key is arranged with three specific zones, one intermediate to be engaged and cooperate with the sleeve, another upper opening of the sleeve and being arranged with means for gripping and positioning a disassembly tool, and another lower to engage in the lower part forming seat of the tooth, and in that the key in its intermediate portion has on its lateral faces a plurality of horizontal zones of tool holders extended by an alternation of recessed areas and projections capable of cooperating with a plurality of complementary raised and recessed zones established in the sleeve to ensure an adjustment and anchoring, and in that the tooth is arranged with a flared upper opening allowing the introduction of the key and the positioning and actuation of a tool for
• FIGS. 3 and 4 are schematic views in a variant in which the nose-adapter has a stabilizing front plate and where the connection of the tooth on the adapter is obtained and supplemented by ears.
• FIG. 5 is a view of a key referred, according to the prior art, in half section.
• - Figure 6 is a view of the key according to Figure 5.
• - Figure 7 is a view showing the mounting of the key in a tooth-adapter assembly, according to the prior art.
• FIG. 8 is a view of a tooth called RIPPER, according to the prior art, with the use of a key incorporating a sheath.
• FIG. 9 is a sectional view along the line AA of FIG. 8.
• FIG. 10 is a perspective view of the tooth-adapter sleeve-key coupling assembly, before assembly, showing an implementation complementary forms of contact and binding established on the adapter and the tooth.
• FIG. 11 is a view from below of the adapter as illustrated in FIG. 10.
• FIG. 12 is a longitudinal sectional view along XIII.XIII of the tooth-adapter coupling assembly after assembly in a first interior design variant of the tooth.
• FIG. 13 is a top view and in section along XII.XII.
• FIG. 14 is a schematic view of another interior configuration of the tooth.
• FIG. 15 is a partial side view of the end of the adapter nose.
• FIG. 16 is a view from above, according to FIG.
• FIG. 17 is an alternative view, according to FIG. - Figure 18 is a top view, according to Figure 17.
• FIG. 19 is a side view of the key according to the invention.
• FIG. 20 is a top view of the key, according to Figure 19.
• FIG. 21 is a front view of the key, according to Figure 19.
• FIG. 22 is a side view and in section of the receiving sleeve of the key object of the invention.
• - Figure 23 is a front view and in section along the line IV.IV of Figure 22.
• Figure 24 is a top view, according to Figure 22.
• FIG. 25 is a view from below, according to Figure 22.
• FIG. 26 is a partial sectional view of the adapter receiving said sheath.
• FIG. 27 is a partial view in section of the tooth fitting on the adapter and receiving the key according to the invention.
• FIG. 28 is a partial sectional view along the line V.V. of Figure 27.
• - Figure 29 is a view of the lower outer face of the tooth.
• FIG. 30 is a view of the upper outer face of the tooth.
• FIG. 31 is a partial sectional view illustrating the mounting of the keying device, feather key between the tooth and the adapter.
• Fig. 32 is a top view according to Fig. 31.
• Fig. 33 is a sectional view according to Fig. 31 showing the removal of the key.
• a tooth (D) and an adapter (A) can be associated and secured by a key (C).
• the nose of the adapter is arranged in known manner in front with a stabilizing plate and or not openings for the reception of lateral ears arranged at the ends of the tooth.
• the tooth and the adapter are arranged with complementary shapes (FA) supporting profiles in differentiated planes located between their respective ends and the stabilizing plate for the adapter and the tooth base, of on the one hand, and their opposite connecting and centering ends, on the other hand.
• These complementary shapes (FA) are arranged symmetrically and in opposition on the upper (FS) and lower (FI) faces of the nose of the adapter and the tooth.
• These complementary shapes are therefore additional support zones that complete the support zones installed on the stabilization plates, in front of the nose of the adapter, and back, if necessary, in the ears housing of the tooth, which no longer have to receive the effort alone when applying a stress on the stabilizing plate.
• These shapes (FA) profiled additional support can increase the surface of stabilizing plates, to perform a better distribution of the forces received by the adapter nose, and to increase the total surface receiving the transmitted forces. This reduces the possibility of movement of the tooth relative to the adapter and reduces wear.
• the upper (FS) and lower (FI) faces of the adapter nose are arranged between the front part of the stabilizing plate and the rear part beyond the zone constituting the nose of the adapter.
• said stepped forms located on the upper and lower faces of the adapter nose are established in the extension of the stabilizing plate, established in a plane (a) which is extended by an inclined plane (a2) to the connection with the top connecting part of the F adapter nose area to the F adapter body.
• the stepped shape thus defines an upper plane (a3) of complementary support which is oriented angularly with respect to the plane (a) of the stabilizing plate and also with respect to the oblique connection plane (a2).
• the stepped shape is, in its front part, in turn connected to the stabilizing plate (a1), itself offset with respect to the plane (a), by a reentrant inclined plane (a4), so that said shape has, in its front part, a sloping configuration forming a notch.
• the plane (a2) is inclined at the angle (G2) with respect to the plane (a).
• the plane (a3) which starts from the same vertex (0) as the plane (a2), defines, with the latter, an angulation (G3) smaller than the angulation (G2), which allows the establishment of contact (a4 - a5) forming abutments at an inclination (G4) less than 90 ° relative to the plane (a1) and oriented relative to the longitudinal axis of the assembly at an inclination (G5) also less than 90 °.
• the shape (FA) thus described is found on the underside of the adapter nose symmetrically and opposite to the longitudinal centerline of the adapter.
• the width of this shape (FA) on the nose of the adapter is preferably equal to half of the total width of the nose of the adapter, thereby partially freeing the inclined plane (a2).
• connection zone of the upper inclined plane (a3) with the inclined plane (a2) can be locate at any level relative to the body of the adapter.
• FIG. 10 thus shows upper (LS) and lower (LI) housings disposed from the upper and lower faces of the tooth, and receiving the form (FA) of the aforementioned type. These housings have support walls and contact with the forms (FA).
• the zone of junction with the front end forming a notch of the shape (FA) may be complementary (FIG. 12) to define a firm interlocking of complementary parts facing each other, or alternatively, the tooth may have (FIG. 14) an interior clearance, so that the notched portion is not in contact with and contact with the bottom of the housing established on the tooth and receiving complementary shapes (FA).
• the particular configuration of the nose of the adapter and the tooth greatly increases the contact and support surfaces.
• the intermediate support zones may be arranged on the horizontal and / or vertical faces of the nose of the adapter, the tooth being arranged in a complementary manner.
• This implementation thus meets a first objective, that of limiting the respective movements of the tooth on the adapter with increasing bearing surfaces and their angular orientation to find themselves favorably positioned to respond and absorb the multi-directional stresses transmitted. by the tooth.
• this implementation can be sufficient, whatever the keying system used.
• the keying device implements, to fulfill the functions and objectives sought above recalled, a key C, having a specific profile and conformation, capable of engaging and cooperating in a sleeve (F) having an elastic capacity of deformation, the key and the sheath being able to be engaged and protected in the assembly of the tooth (D) on the adapter (A) found on the buckets and buckets of the public works machines.
• the adapter and the tooth are themselves profiled, one to receive internally said sheath, and the other to, on the one hand, protect the key in partial overflow of the sheath and allow the introduction of tools disassembly of the key in the situation of removal of the worn tooth.
• the adapter (A) has a housing (AL) for receiving the elastic sleeve (F) (FIG. 25) and the tooth (D) (FIG. 27, 28 and 29) has an upper orifice (D1) for the introduction of the key (C) with the passages (D 1,2) and (D 1,3) for the access of the dismantling tool of the key, and a lower orifice (D2) having the stop (D2, 1) and the opening portion (D2,2).
• the key is constituted by a pyramidal body (Cl) allowing it to have a wedge effect, whose section is rectangular or trapezoidal.
• the rear face in contact with the orifices of the tooth (D) is more advantageously rounded.
• a boss (C2-C3) having a function of gripping and against-support of the tool, and one or more notches (C4) successive horizontal and spaced along said parts. These notches are intended to allow the positioning of the tip of the tool for removal.
• At least the upper notch that appears in FIG. 19 is disengaged from the sheath (F) and into the space or introduction opening formed in the tooth.
• the following notch (s) may be partially in the interior volume of the sheath when the key is in place. The release of the key causes the progressive accessibility to the other notches to allow the introduction of the tool again and operate an additional clearance until the final removal of the key.
• the intermediate portion (Z2) of the key then has, on the two lateral faces whose surface is voluntarily broadly dimensioned and underlying, one or more hollow areas (C5) separated by relief zones (C 15) alternately .
• Said zones (C5-C15) are established in a horizontal plane on said lateral faces.
• These zones (C5-C15) thus have a complementary profile with a configuration similar to that in the inner part of the sleeve (F) with a succession of complementary hollow and relief zones (F 15 -Fl 6) to allow assembly and locking in the position of the key in the sheath.
• the sheath of a material having an elastic capacity of deformation it ensures a firm connection of the key in the sheath.
• the front face (C6) of the key is rectilinear and terminated in the lower zone by a radius or chamfer (C7) to avoid an angle that could damage the area (F 1-2) of the elastic sleeve during its introduction.
• the rear face of the key comprises a zone (C8) recessed with respect to the two active faces (C9) and (ClO) arranged in the upper and lower part of the key, which bear in the two orifices (D1) and ( D2) of the tooth (D).
• the active face (C9) is arranged with a notch (Cl 1) forming a stop for blocking the exit of the key upwards and, at the end of the active face (ClO), a chamfer (C12) to facilitate the installation of the lower end of the key in the hole of the tooth (D2).
• the lower zone (Zl) of the key protruding from the sleeve has an abutment face (C13) and the end of small section (C14).
• the key thus defined is of great length and is likely to extend beyond the sheath (F) in which it is engaged, on the one hand by its upper part and, on the other hand, by its lower part as it appears in FIGS. 31 and 33 of the drawings.
• said notches (C4) may have transverse recesses in their thickness to facilitate the taking of tools.
• the sheath (F). This is made of a material having an elastic capacity of deformation. For example, it is made of rubber or polyurethane resin.
• This sleeve has an outer pyramidal shape to facilitate its introduction and its replacement in its housing (AL) formed in the adapter holder.
• This sheath has a central through opening (Fl) receiving the key (C).
• On the inside front (Fl-I) is disposed an over-thickness of material (F 1-2) which represents the elastic volume which will be put in compression by the key during its introduction.
• the inside rear face is marked (F 1-4) and is straight. Its mission is to guide the key when it is introduced.
• the height of the sleeve is set to correspond to the intermediate zone (Z2) of the key with its successive parts (C5-C15) recessed and raised.
• the key secured to the tooth by its contacts in the orifices of the latter also has, on its lateral faces (C 15) and (C16), a tight elastic support on the lateral faces (Fl .5) and (Fl.6) of the sheath (F).
• the adapter has a vertical opening of pyramidal configuration to receive the sheath.
• the tooth has an upper orifice (D1) for introducing the key with flared parts (D 12 -Dl 3) to allow the passage of the active part of the disassembly tool and access to the different notches (C4 ).
• said flared portions have a straight slope profile (D 12.1 -D 13.1) to form a base against against-support during the pivoting movement of the release tool.
• the lower part of the tooth (D) has an opening of passage (D2) of the lower end of the key with an upper recess zone (D2.1) corresponding to the zone of support of the zone (C 13) of the key forming a seat, the lower emergent part being referenced by (D2.2) and receiving the final end of the key.
• the assembly of the key and the sleeve is as follows.
• the sleeve (F) is introduced beforehand into its housing (AL) of the adapter support (A) (see Figure 26) and is maintained by the corresponding pyramidal shape.
• the tooth (D) is set, that is to say, introduced on the adapter and the key is inserted by force, using a striking tool.
• the key can not be placed upside down.
• the wedge shape of the key facilitates its introduction by gradually operating the compression of the zone (F 1-2) of the sleeve (F).
• the necessary force of introduction is thus also progressive and is only at its maximum in the final position. This is obtained when the abutment face (C 13) meets the face (D2-1) of the tooth.
• This abutment face (D2-1) is placed very indented so as to always exist, even in the case of extreme wear of the outer face of the tooth.
• the chamfer (C 12) allowed the entry of the key into the hole (D2) of the tooth even if there is a positional shift of the tooth forward with respect to its adapter support.
• the key by the succession of its zones in projections and recesses, is thus centered and maintained in the recessed zones and complementary projections of the sheath.
• the chosen material of the sheath makes it possible, by virtue of its elastic deformation capacity, to retract or crush during the passage in force of the raised areas of the key facing each other. areas in relief of the sheath. After passage, the lateral zones in relief of the sheath return to their initial position and are anchored in the recessed areas of the key. After installation, we are in the mounting situation of Figures 31 and 32.
• This compression also creates, on the part of the key C pushed backwards, a bearing force on the rear inner face (Fl-4) of the sleeve.
• the key has the clearance (C8) which eliminates its contact with the face (Fl-4), which no longer has the ability to transmit an opposition reaction.
• this configuration of the reliefs (Fl-3) of the sheath and recesses (C5) and of the key has the particularity of being established parallel to the horizontal axis of the assembly so as to leave all freedom at the key to move forward or backward its position according to the level of depression of the tooth on its adapter support.
• the raised reliefs (Fl-3) form a staircase restraint which does not allow a total untimely exit. It can only be established in stages corresponding to each level (Fl-3).
• a conventional lever forming tool such as a screwdriver which, resting on the faces (D 1-2-1) and ( D 1-3-1) passages (D 1-2) and (D 1-3), can lift the key by placing itself in the notches (C4) under the two bosses (C2) and (C3) and in the notches (C4) following, and this by a counter-support effect on the straight parts and tilting of the tool that raises the key.
• the force of action on the tool is sufficient to disengage the full and recessed complementary parts formed on the sheath and the key.
• the height of the bosses (C2) and (C3) is voluntarily large so that, in the case of extreme wear of the upper face of the tooth, there remains, on the key, enough material for the action of such lever as shown above.
• the solution provided by the invention by a firm connection between the key and the sheath due to the complementarity of the protruding and recessed forms on the lateral faces (C 15 -Cl 6) and the lateral faces (F 15-Fl 6) the sheath, with a tight elastic connection makes it possible to respond to the problem of controlling the pivoting of the tooth relative to the nose of the adapter.
• the key-sleeve assembly forms a one-piece assembly that stiffens the tooth-adapter connection, and limits the possibility of pivoting. This is an important advantage of the invention.
• this key connection device is well in the invention and particularly emphasizes the easy assembly and disassembly of the key while respecting the constraints of holding and safety during use of the entire device.
• the key and its sheath are, moreover, perfectly protected in the tooth-adapter coupling.
• the integrated concept provides the ability by keying to apply, a significant variable force of tooth retention on the adapter, even if the driving position of the tooth on the adapter bracket varies. This retaining force is created by placing in strong compression the surplus of elastic material of the sheath.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Component Parts Of Construction Machinery (AREA)
• Earth Drilling (AREA)
• Automatic Tool Replacement In Machine Tools (AREA)
• Automatic Assembly (AREA)
• Ceramic Products (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34954147

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (6)

Family Cites Families (8)

• 2004
  • 2004-12-02 FR FR0452840A patent/FR2878870B1/fr active Active
• 2005
  • 2005-11-30 CN CN2005800460752A patent/CN101099006B/zh active Active
  • 2005-11-30 ES ES05819318T patent/ES2382095T3/es active Active
  • 2005-11-30 WO PCT/FR2005/051004 patent/WO2006059034A1/fr active Application Filing
  • 2005-11-30 EP EP05819318A patent/EP1819881B1/de active Active
  • 2005-11-30 AT AT05819318T patent/ATE547571T1/de active

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events