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
  • E02F9/2808—Teeth
  • E02F9/2816—Mountings therefor
  • E02F9/2825—Mountings therefor using adapters
• • 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
  • E02F9/2808—Teeth
  • E02F9/2816—Mountings therefor
  • E02F9/2833—Retaining means, e.g. pins
• • 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
  • E02F9/2808—Teeth
  • E02F9/2816—Mountings therefor
  • E02F9/2833—Retaining means, e.g. pins
  • E02F9/2841—Retaining means, e.g. pins resilient
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
  • Y10T29/49947—Assembling or joining by applying separate fastener
  • Y10T29/49948—Multipart cooperating fastener [e.g., bolt and nut]
  • Y10T29/4995—Nonthreaded

Definitions

• the present invention relates to a mechanical system comprising a support, a wear part and a connecting device between the wear part and its support, in particular a tooth and its support belonging to a device. construction machinery equipment.
• the invention also relates to a bucket of construction machinery comprising at least one such system.
• the invention relates to a method of implementing such a system.
• the field of application of the invention is that of equipment of public works machinery, in particular buckets, buckets or other receptacles capable of scraping, removing and moving materials for the purpose of evacuation from a given place to other operating posts using public works machinery.
• a bucket comprises a driving blade equipped with wear parts provided for their ability to penetrate the material and protection of the other components of the bucket.
• wear parts On the attacking blades are fixed adapter-holders having a profiled nose, while the wear parts are teeth or shields which are positioned on the support-adapter in a precise connection. This connection is temporary to allow the replacement of wearing parts after wear.
• connection between the wear part and its support can be achieved by a keying.
• the keying devices must provide a rigid connection of the elements they bring together.
• the assembly and disassembly of the keyings are performed by the action of striking tools, with the risk of injury to operators.
• Locking devices are also known which do not require the use of striking tools. In this case, special binding equipment is necessary, especially for dismantling the wear part. On the other hand, the known devices are complex to manufacture and use.
• FR-A-2 884 841 discloses an improved device for connecting by keying between a wear part and its support.
• the key is disposed in an elastically deformable sleeve, itself arranged in a housing of the support.
• the rotation of the key causes its misalignment with respect to its initial axis and its support, either in the sheath by anchoring, or against metal parts of the wear part and its support. By rubbing in the sheath, the key is likely to cause its wear.
• Such a connecting device is satisfactory, but can be improved, particularly in terms of simplicity of use and wear resistance.
• AU-B-773 435 discloses another connecting device between a wear part and its support.
• This device comprises a key and a deformable sleeve disposed in a housing of the support.
• This sleeve comprises a rib positioned in a groove of the housing, thus preventing any rotation of the sleeve in the housing.
• the key is disposed in an internal cavity of the sleeve, with a key body elongated between two cams eccentric profile relative to the axis of the key body.
• the key body and the cavity of the sleeve have octagonal sections.
• the key body can pivot in the cavity of the sleeve by the action of a tool.
• the cams exert a locking force in the openings of the wear part.
• the key and the sleeve are not rotatably movable in rotation in the support housing, but rub against each other. This device is not entirely satisfactory, especially in terms of simplicity of use and wear resistance.
• the object of the present invention is to provide an improved connection device, making it possible to dispense with striking operations for mounting and for dismantling wear parts.
• the invention is directed to a high-performance, reliable, resistant, simple and practical keying device.
• the subject of the invention is a mechanical system, comprising a support, a wear part and a device for connecting the wear part and its support, in particular a bucket tooth and its support which belong to a public works machinery equipment, the connecting device comprising:
• a sheath of elastically deformable material provided with an internal cavity and an adjustable external wall in a housing of the support, and
• a key having an elongate body along a key axis, the body being adjustable in the inner cavity of the sleeve.
• the internal cavity extends in the sleeve along an eccentric axis offset radially with respect to the axis of pivoting, the internal cavity being provided with elements of rotationally fastening with drive elements provided on the body of the key.
• the invention makes it possible to form a rigid connection between the wear part, in particular a bucket tooth, and its support, with great simplicity and high performances.
• the key and the sheath are removable together in insertion configuration and secured in locking configuration.
• the connecting device according to the invention is simple to manufacture and to implement.
• the assembly and disassembly of the mechanical system is feasible with a consequent time saving and a reduced risk of injury.
• the elements for securing in rotation of the sheath with the key are grooves, while the drive elements formed on the key are ribs or fins housed in these grooves.
• the cooperation between the sheath and the key, in particular between the grooves and the fins, is carried out by support and not by friction.
• the life of the sleeve and, therefore, the connecting device are improved over existing devices.
• the reliability of the link is improved, while the costs are reduced in the long run.
• the connecting device can be implemented within the mechanical system with at least seven successive wear parts.
• the housing of the support and the outer wall of the sheath have transverse sections, in a plane perpendicular to the pivot axis, which are polygonal and substantially complementary, for example pentagonal or hexagonal.
• the drive elements comprise at least one fin extending parallel and radially to the key axis from the body of the key, preferably at least three fins distributed radially around the key axis.
• the drive members comprise an outer surface of the body of the key, this outer surface having a polygonal section in a plane perpendicular to the key axis, for example a triangular section, square or rectangular.
• the securing elements comprise at least one groove extending parallel and radially to the eccentric axis, in the direction of the outer wall, from an edge of the inner cavity of the sleeve.
• the body of the key is elongated along the key axis between a head and a foot opposite longitudinally, with at least the head and / or the foot which is actuable by a tool causing the rotation of the key and the sleeve around the pivot axis, between the insertion configuration and the lock configuration.
• the head of the key comprises a cylindrical portion centered on the key axis, the cylindrical portion partially extending from the outer wall of the sleeve in a radial direction to the pivot axis.
• the key has a center of gravity located on the key axis, including the key axis is an axis of symmetry of the key.
• a polarizing element is provided projecting on the outer wall of the sleeve, this polarizing element being adapted to identify the insertion configuration of the sleeve in the housing of the support.
• the sheath has a metal insert disposed around the inner cavity, the metal insert being closer to the inner cavity and the securing elements than the outer wall of the sheath.
• the invention also relates to a bucket of construction machinery, comprising at least one mechanical system as mentioned above.
• the bucket generally comprises a series of supports each receiving a tooth which behaves as a wear part and is secured to its support by a connecting device.
• the subject of the invention is a method for implementing a mechanical system as mentioned above.
• the method is characterized in that it comprises the following steps:
• FIG. 1 is an exploded perspective view of a mechanical system according to the invention, comprising a support integral with a partially shown bucket, a wear part, and a connecting device of the part of wear and support, this connecting device comprising a sheath and a key;
• FIG. 2 is another perspective view of the system, showing only the support and the sleeve;
• FIG. 3 is an elevational view along the arrow III in Figure 1, the wear part not being shown;
• FIG. 4 is a side view along the arrow IV in Figure 1, showing the connecting device in an insertion configuration
• Figure 5 is a view similar to Figure 4, showing the connecting device in a locking configuration
• FIG. 6 is a view on a larger scale of detail VI in FIG. 4, showing the binding device fitted in the support;
• FIG. 7 is a section along line VII-VII in Figure 3, corresponding to detail VI of Figure 6 and showing only the sheath adjusted in the support;
• FIGS. 8, 10 and 12 are views similar to FIG. 6, showing the connection device in various intermediate configurations between the insertion configuration and the locking configuration;
• FIGS. 9, 11 and 13 are sections similar to FIG. 7, showing the sheath in the intermediate configurations corresponding respectively to FIGS. 8, 10 and 12;
• FIGS. 14 and 15 are views similar to FIGS. 6 and 7, showing the connection device in the locking configuration of FIG. 5;
• FIG. 16 is a perspective view of the key belonging to the connecting device
• FIG. 17 is an elevational view along the arrow XVI I in Figure 16;
• FIG. 18 is a perspective view of a key belonging to a mechanical system according to a second embodiment of the invention.
• Figure 19 is a view similar to Figure 17 for the key of Figure 18;
• FIG. 20 is a perspective view of a key belonging to a mechanical system according to a third embodiment of the invention.
• Figure 21 is a view similar to Figure 17 for the key of Figure 20.
• a mechanical system 1 according to the invention, equipping a bucket G of public works machinery.
• the mechanical system 1 comprises an adapter-holder 10, a wear part 20 of the tooth type, as well as a device 30 for connecting the support 10 to the tooth 20.
• Bucket G is partially shown in Figure 1, for simplification purposes.
• the support 10 is integral with the bucket G, while the tooth 20 is a wear part to be disassembled when it is too worn by the operation of the bucket G.
• the connecting device 30 comprises a sleeve 40 and a key 50, adjustable in a housing 14 of the support 10 and movable integrally in a rotational movement R1 in the housing 14.
• the device 30 pivots between, on the one hand, a configuration of insertion A where the sleeve 40 is fitted in the housing 14 of the support 10 while the key 50 has no contact with the tooth 20 and, secondly, a locking configuration B where the key 50 bears against the tooth 20 while the sleeve 40 presses into the housing 14 of the support 10, thus forming a coupling connection between the tooth 20 and its support 10.
• FIG. 1 shows an assembly configuration resulting in the configuration of FIG. insertion A
• Figures 8 to 13 show intermediate configurations between configurations A and B, while the device 30 rotates R1 180 °.
• a front side 2 is defined at which the tooth 20 is located, a rear side 3 at which the support 10 is located, an upper side 4 oriented to the opposite of the ground when the system 1 is assembled, a first insertion side of the device 30 in the support 10, and a second side 6 opposite the insertion side 5.
• the support 10 comprises a base 1 1, partially shown in Figures 1 to 5, and a fitting nose 12 adapted to be engaged in a cavity of the tooth 20 shaped for this purpose.
• a housing 13 for receiving the lugs 23 of the tooth 20 is provided on each side 5 and 6 of the base 1 1.
• Each housing 13 has walls located towards the rear 3, the top 4 and the bottom, and is open towards the front 2 in order to receive the ears 23.
• the housing 14 extends through the nose 12 along an axis X14, opening on the sides 5 and 6. This housing 14 is surrounded by the housing 13 on the sides 5 and 6.
• the housing 14 has a polygonal section, more precisely hexagonal, in section in a plane perpendicular to the axis X14 .
• the housing 14 is defined by flat faces 15 connected by angles 16.
• the angles 16 are obtuse, concave and slightly rounded.
• a groove 17 for receiving a polarizer 47, belonging to the sheath 40, is formed parallel to the axis X14 on one of the faces 15.
• the tooth 20 comprises an active portion 21 located forwardly 2 and a hollow portion 22 facing rearward 3.
• the portion 21 is intended to scrape and remove materials, for example earth or gravel, while the portion 22 is provided for the fitting of the tooth 20 on the support 10.
• the portion 22 comprises the inner cavity, not visible in Figures 1, 4 and 5, shaped for the fitting on the nose 12 of the support 10, and the ears 23 which are directed towards the rear 3 and intended to be received in the housings 13, in contact upwards 4 and down, as shown in Figures 4 and 5.
• Orifices 24, each having a substantially cylindrical shape, are formed in each lug 23, on either side of the tooth 20 on the sides 5 and 6. These orifices 24 are positioned facing the housing 14 when the tooth 20 is fitted. on the support 10, then allowing the implementation of the device 30 inserted in the support 10. Only the ear 23 and the orifice 24 located on the side 5 are shown in Figures 1, 4 and 5. The ear located on the side 6 is similar to the lug 23 located on the side 5, while the orifice on the side 6 has a smaller diameter than the orifice 24 located on the side 5. In practice, the orifices 24 are provided to receive the key 50 resting on the tooth 20 in the locking configuration B, as detailed below. In particular, as shown in FIGS.
• a support zone Z25 is delimited in the orifice 24 situated on the side 5.
• a mark 28 is arranged on the lug 23 situated on the side 5 in order to facilitate the insertion of the key 50 into the system 1, with a specific initial position, in the insertion configuration A.
• the sheath 40 is of elastically deformable material, for example elastomer.
• the sleeve 40 is elongate between longitudinal ends 41 and 42 along a central axis X 40, which is intended to be aligned with the axis X 14 of the housing 14.
• the end 41 is located on the side 5
• the end 42 is located on the side 6.
• the sheath 40 comprises an outer wall 44 of polygonal section, more precisely hexagonal, in a plane perpendicular to the axis X40.
• the wall 44 has plane faces 45 connected by angles 46.
• the angles 46 are obtuse, convex and slightly rounded.
• a polarizer 47 extends parallel to the axis X40 on one of the faces 45 and is adapted to be received, in insertion configuration A, in the groove 17 of the housing 14.
• the axis X40 is equidistant from the faces 45 and equidistant from the angles 46, so that the axis X40 can be considered as the central axis of the wall 44.
• the housing 14 and the outer wall 44 have substantially complementary shapes, so that the sleeve 40 can be adjusted in the housing 14 of the support 10.
• the sleeve 40 also comprises a longitudinal internal cavity 48 which extends along an axis X48 eccentric with respect to the axis X40.
• the axis X48 is parallel to the axis X40, with an eccentric distance e40 formed between them in a plane perpendicular to the axis X40, as shown in Figures 2, 4 and 7.
• the sleeve 40 is generally annular and closed around the X48 axis.
• Five longitudinal grooves 49 are formed in the internal cavity 48. More specifically, the grooves 49 extend radially to the axis X48 from an edge of the internal cavity 48, being parallel to this axis X48.
• the inner cavity 48 and the grooves 49 open on either side of the sleeve 40, along the eccentric axis X48.
• the grooves 49 constitute elements for securing in rotation R1 of the sleeve 40 with the key 50.
• the key 50 is metallic, for example steel.
• the key 50 comprises a body 53 elongated along an axis X 50 between a head 51 and a foot 52.
• the head 51 comprises a hexagonal portion 54 for actuation by a tool, not shown for purposes of simplification, and a cylindrical portion 55 bearing in the orifice 24 of the tooth 20.
• the foot 52 also has a hexagonal section for driving by a second tool.
• the head 51 and the foot 52 may be shaped differently for actuation by other types of tools.
• a mark 58 oriented on the side 5 is disposed on the part 54, in order to be positioned facing the mark 28 during the insertion of the key 50 in the sleeve 40 and the support 10, through the orifice 24 situated on the side 5.
• Ribs or fins 59 extend parallel to the axis X50 on the body 53, radially to the body 53, as shown in particular in FIGS. 1 and 16.
• the fins 59 constitute rotational drive elements R1 of the sheath. 40 through the key 50.
• the fins 59 extend over the majority of the body 53, so as to engage a large contact surface against the ribs 49 of the sleeve 40.
• the fins 59 are distributed radially all around of the key 50, for a better distribution of the forces exerted in the ribs 49 during the rotation R1.
• the center of gravity of the key 50 is located on the axis X50.
• the key 50 is a piece of revolution about the axis X50, without eccentric portion.
• a first step a) the sleeve 40 is inserted by the end 42 into the housing 14 of the support 10, with the polarizer 47 which is housed in the groove 17.
• the polarizer 47 allows indexing of the sleeve 40, which allows to an operator easily identify their specific initial position.
• the ends 41 and 42 are reversible, so that the operator is concerned only with the orientation of the polarizer 47.
• the sleeve 40 is fitted in the housing 14, with the wall 44 which deforms slightly centripetally if necessary.
• the faces 45 are positioned facing the faces 15, while the angles 46 are positioned opposite the angles 16.
• a clearance is provided between the wall 44 and the housing 14, to facilitate the insertion of the sleeve 40 into the 14.
• this game is of the order of a few tenths of millimeters or a few millimeters.
• the central axis X40 and the eccentric axis X48 of the sheath 40 are situated substantially in a median plane Pm10 of the support 10 containing the axis X14, as shown in FIGS. 3, 4, 6 and 7.
• a second step b the tooth 20 is positioned on the support 10, with the active part 21 which is oriented so as to be able to scrape and collect materials in operation of the system 1.
• the hollow portion 22 is fitted on the nose 12, with complementary planes bearing against each other.
• the ears 23 are received in the housing 13 of the base 1 1.
• the orifices 24 reveal the cavity 48 and the grooves 49, for the introduction of the key 50.
• steps a) and b) can be reversed, in the case where the wall 44 of the sleeve 40 is dimensioned to be inserted into the housing 14, with or without deformation, passing through the orifice 24 of the tooth 20.
• the operator places the sleeve 40 in the support 10 before pressing the tooth 20 on the support 10.
• a third step c) the key 50 is inserted into the internal cavity 48 of the sleeve 40, passing through the orifice 24 of the side 5.
• the key 50 has a given orientation, that is to say say that its introduction into the cavity 48 is always performed with the foot 52 which passes first.
• the mark 58 is positioned opposite the mark 28, so that subsequently, the operator can easily locate the relative position of the device 30 and the support 10 during the rotation R1.
• the foot 52 enters the cavity 48 by the end 41 and leaves the cavity 48 at the end 42, the fins 59 are housed in the grooves 49, while the head 51 protrudes from the cavity 48 at the end 48. from the end 41.
• the cylindrical portion 55 of the key 50 is positioned in the orifice 24 of the atrium 23 located on the side 5, while the end of the body 53 and the foot 52 are positioned in the other orifice of the A headset located on the side 6.
• Figures 3 and 4 illustrate this configuration, the tooth 20 is not shown in Figure 3 for the sake of simplification.
• the key 50 is fitted in the sleeve 40, directly in contact with the internal cavity 48, but without contact with the support 10 and the tooth 20, in particular without contact with the orifices 24.
• a gap eA is formed radially to the axis X50 between the portion 55 and the inner bore of the orifice 24 located on the side 5.
• This gap eA is lower at twice the eccentric difference e40.
• the X50 axis coincides with the X48 axis, while the X40 axis coincides with the X14 axis.
• the plane Pm10 comprises the axes X14, X40, X48 and X50 which are merged or parallel to each other, as well as the differences eA and e40.
• the X14 and X40 axes then constitute the pivot axes of the connecting device 30 within the system 1, as detailed below.
• a fourth step d) the operator uses a tool to rotate the device 30 through 180 ° rotation R1 about the pivot axis X40, from the insertion pattern A to the lock pattern B.
• the operator uses at least one tool to exert torque around the axis X50 on the portion 54 of the head 51, but may also use a tool to exert a complementary torque on the foot 52.
• the rotation R1 of the key 50 causes the support of the fins 59 in the grooves 49, so that the sleeve 40 pivots integrally with the key 50.
• the vanes 59 constitute rotating elements of the sleeve 40, acting on the grooves 49 which constitute fastening elements in rotation of the sleeve 40 with the key 50.
• the cooperation between the sleeve 40 and the key 50, more precisely between the grooves 49 and the fins 59, is made by support and not by friction This increases the life of the sleeve 40.
• FIGS. 4 to 11 The transition from the insertion configuration A to the locking configuration B is illustrated in FIGS. 4 to 11.
• the outer wall 44 of the sleeve 40 undergoes several successive partial elastic deformations in the housing 14 during the rotation R1.
• the angles 46 deform in contact with the walls 15, every sixth turn since the housing 14 and the wall 44 have complementary hexagonal sections.
• the polarizer 47 can also be deformed against the walls 15.
• the "jolts" caused by the successive deformations, localized at the angles 46 allows the operator to count the turns, in addition to the visual aid provided by the marks 28 and 58. Indeed, under the conditions of use of the system 1, the pins 28 and 58 are likely to be masked by dust or earth.
• a fifth step e the rotation R1 of the device 30 is stopped in the locking configuration B.
• the axes X14, X40, X48 and X50 remain parallel to each other, both the insertion configuration A and in the In particular, the key axis X50 is located, both in the insertion configuration A and in the locking configuration B, substantially in the median plane Pm10 of the 10.
• the key 50 pivots 180 ° around the pivot axis X40, with its axis X50 which coincides with the eccentric axis X48.
• the key 50 has moved as if it had undergone an inverted symmetry with respect to the pivot axis X40, as can be seen by comparing FIGS.
• the cylindrical portion 55 of the key partially protrudes from the outer wall 44 of the sleeve 40, in a direction radial to the pivot axis X40.
• the key 50 is gradually press against the tooth 20 in the second half of the rotation R1, corresponding to Figures 12 to 15.
• the key 50 bears against the tooth 20, while the sleeve 40 presses in the housing 14 of the support 20, forming a coupling connection between the tooth 20 and the support 10. More specifically, a support zone Z55 delimited on the portion 55 of the head 51 bears against the zone Z25 of the orifice 24 located on the side 5, while a bearing zone Z53 delimited on the body 53 is supported in the orifice of the atrium 23 located on the side 6. In other words, the body 53 and the portion 55 provide a support and push function, at the zones Z53 and Z55, in the orifices 24 of the tooth 20, respectively sides 6 and 5.
• a gap eB is formed in the plane Pm10 between the portion 55 and the orifice 24, opposite zones Z25 and Z55.
• the gap eB is of the order of twice the gap eA.
• the key 50 presses on the tooth 20 in a first direction directed from the front 2 towards the rear 3, whereas the deformable sleeve 40 is crushed in the housing 14 of the support 10 in a second direction opposite to the first direction, from the 3 back forward 2. Due to the complementary shapes of the housing 14 and the wall 44, an accidental rotation of the sleeve 40 and therefore the device 30 is prevented.
• the portion 22 of the tooth 20 is held firmly in the position of use by both the locking device B in the locking configuration B, by the nose 12 and by the walls of houses 13 receiving ears 23.
• a step f) disassembly the operator can use at least one tool, preferably two tools, to rotate the device 30 in a direction opposite to the direction of rotation R1.
• the forces exerted by the device 30 on the tooth 20 and the support 10 relax from the locking configuration B to the insertion configuration A.
• the device 30 can be removed from the system 1, eliminating the connection of coupling between the tooth 20 and the support 10.
• the device 30 allows disassembly of the tooth 20 without hammer, after wear thereof, by reverse operations to the mounting.
• Figures 18 and 19 is shown a key 150 belonging to a second embodiment of a mechanical system according to the invention.
• the key 150 comprises a body 153 which is elongate along an axis X 150 between a head 151 and a foot 152 and which is provided with five fins 159.
• the key 150 has a similar operation, but a different structure, in comparison with the key 50 of the first embodiment.
• the main difference concerns the body 153 and the fins 159 which have, in section in a plane perpendicular to the axis X150, a star shape with five branches.
• the transition between the fins 159 forms a concave round.
• the center of gravity of the key 150 is located on the axis X150.
• FIGS. 18 and 19 Only the key 150 is shown in FIGS. 18 and 19, it being understood that the sleeve used with this key 150 has complementary shapes, in particular at the level of the internal cavity and grooves cooperating with the fins 159.
• FIG. 20 and 21 is shown a key 250 belonging to a third embodiment of a mechanical system according to the invention.
• the key 250 comprises a body 253 which is elongate along an axis X250 between a head 251 and a foot 252 and which is provided with four fins 259.
• the key 250 has a similar operation, but a different structure, in comparison with the key 50 of the first embodiment.
• the main differences concern the body 253 and, to a lesser extent, the head 251.
• the body 253 has a square section and not cylindrical, in a plane perpendicular to the axis X250.
• the four fins 259 extend radially to the axis X250 from the four lateral faces delimiting an outer surface 257 of the parallelepipedal body 253.
• the driving elements of the sleeve which equip this key 250 are, on the one hand, the fins 259 and, on the other hand, the outer surface 257 having a square section.
• the head 251 comprises a hexagonal portion 254, a cylindrical portion 255 bearing on the tooth 20, and a cylindrical portion 256 of smaller diameter than the portion 255.
• This portion 256 makes the transition, according to the X250 axis, between the portion 255 and the body 253, to simplify the manufacture of the key 250.
• the foot 252 is more elongated than the foot 52.
• the center of gravity of the key 250 is located on the axis X250. More specifically, the key axis X250 constitutes an axis of symmetry of the key 250.
• the sleeve used with this key 250 has complementary shapes, in particular at the level of the internal cavity and grooves that cooperate with, on the one hand, the fins 259. and, on the other hand, the surface 257.
• the constituent elements of the connecting device 30 may be shaped differently without departing from the scope of the invention.
• the key can be configured in a different way from the keys 50, 150 and 250, while being adapted to the present application.
• the key head is designed specifically to withstand the wear of the system 1 in operation, as well as to resist multiple assembly and disassembly by a tool, while the key body cooperates with the sleeve 40.
• the sheath 40 is provided to cooperate with the housing 14 and the key, being deformable, while having sufficient strength.
• the length of the key 50 along the axis X50 is such that the head 51 and the foot 52 do not protrude beyond the orifices 24 of the ears 23, when the system 1 is assembled. As shown in Figure 3, the ends of the key 50 are then protected in the ears 23 of the tooth 20.
• the actuating parts by a tool of the foot 52 and / or the head 51 are shaped differently.
• the portion 55 may comprise a circular or polygonal recess, open towards the outside of the side 5, facilitating the penetration of a tool.
• the body of the key 50 may be provided with three fins, or more than six fins.
• the 250 may have another polygonal section, in a plane perpendicular to the key axis X250.
• the section of the body 253 and its surface 257 may be triangular or rectangular.
• the key 250 may be provided with a body which has a polygonal section but not fins.
• the housing 14 and the wall 44 may have complementary shapes of section other than hexagonal, for example with three, four, five sides, or more than six sides.
• the housing 14 and the wall 44 comprise at least five sides, for example have pentagonal or hexagonal sections.
• the housing 14 and the wall 44 may be irregular polygons, not regular polygons.
• the sleeve 40 may comprise a metal insert, for example core in the mass of elastomeric material.
• This metal insert is disposed around the internal cavity 48, being closer to the internal cavity 48 and the grooves 49 than the outer wall 44 of the sleeve 40.
• the rigidity and the Resistance grooves 49, the immediate vicinity of the cavity 48, and the sheath 40 taken as a whole, are improved.
• the sleeve 40 provided with a metal insert has an increased life.
• the wall 44 of the sleeve may be arranged to facilitate its deformation during the rotation R1.
• the wall 44 may comprise localized recesses, distributed for example on the faces 45, producing a targeted weakening of the wall 44.
• the cavity 48 and the grooves 49 are not open at the end 42 of the sleeve 40.
• the sleeve 40 is not reversible for its introduction into the housing 14. Only the key head can come into abutment against the tooth 20, and not the body and / or the foot of the key.
• the orifices 24 formed in the lugs 23 may comprise reinforced shoulders and / or heat treatments at the contact areas with the key, in order to have an increased surface hardness and facilitate the blocking of the key in locking configuration of the device.
• the connecting device can be adapted in terms of cost and performance.

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• 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)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

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Family Cites Families (17)

• 2011
  • 2011-09-01 FR FR1157732A patent/FR2979647B1/fr active Active
• 2012
  • 2012-08-31 KR KR1020147007641A patent/KR20140079378A/ko not_active Application Discontinuation
  • 2012-08-31 WO PCT/EP2012/066960 patent/WO2013030335A1/fr active Application Filing
  • 2012-08-31 BR BR112014004819A patent/BR112014004819A2/pt not_active IP Right Cessation
  • 2012-08-31 US US14/239,870 patent/US9145662B2/en not_active Expired - Fee Related
  • 2012-08-31 AU AU2012300802A patent/AU2012300802A1/en not_active Abandoned
  • 2012-08-31 EP EP12756426.8A patent/EP2751351A1/de not_active Withdrawn
  • 2012-08-31 CA CA2845668A patent/CA2845668A1/fr not_active Abandoned
  • 2012-08-31 CN CN201280053777.3A patent/CN104024543A/zh active Pending

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