KR20140079376A - Mechanical System Comprising A Device For Connection Between A Wearing Part And The Support Thereof, Heavy-Construction Machine Bucket, And Method For Implementing Said System - Google Patents

Abstract

The present invention is directed to a machine system (1) comprising a support (10), a wear part (20) and a wear part (20) and an apparatus (30) for connecting these two components. The support 10 includes two openings on either side of the housing 14 for receiving the device 30. The device 30 includes a threaded key 50, a nut 60 screwed to a threaded foot 52 of the key 50 and a threaded foot 60 of the key 50 And an elastic sheath 40 provided with a wall 43 which is deformed by the housing 14 of the support body 10 by screwing between the support body 10 and the support body 10. Each opening in the housing 14 has a first portion extending radially up to 180 degrees about the axis and centered on the center X14 of the housing 14 and a second portion connected to the first portion, And a second portion disposed radially alternating with respect to the second portion X14. In the insertion arrangement, the device 30 passes through a second portion of the opening.

Description

TECHNICAL FIELD [0001] The present invention relates to a mechanical system including a connecting device between a wear part and a support, a construction machine bucket, and a method of implementing the system. Implementing Said System}

The present invention relates to a machine, including a support, a wearing part and a connection device between the wear part and the support, in particular a tooth belonging to a part of construction machine equipment and a support therefor. The invention also relates to a construction machine bucket comprising at least one such system. Finally, the present invention relates to a method for implementing such a system.

Field of the Invention The present invention relates to the field of construction machinery equipment and, more particularly, to a scraper, removable, transportable bucket, hopper or other receptacles for transferring materials from a given location to another using construction machines. .

Conventionally, a bucket includes a leading blade with a wear portion provided to penetrate the material and to protect the other elements constituting the bucket. The support-adapter fixed on the leading blade has a profile nose, while the wear-off part is a tooth and shield, which is located on the support-adapter using the correct connection. This connection is temporary so that the wearer can be replaced after wear.

The connection between the wear part and its support can be performed by keying. For high performance, the key device must securely connect the connected elements. Conventionally, key assembly and disassembly has been performed by the use of a striking tool that poses a risk of injury to workers.

It is also known that the key device does not need to use an impact tool. In this case, a particularly limited tool is particularly needed to dismantle the wear parts. Furthermore, conventional devices are complicated to manufacture and use.

FR-A-2 878 871 discloses a key connection device arranged between a wear part and its support. For example, in Figures 5-7, the apparatus includes two cylinders, one of which is screwed onto the other and the rubber sheath is disposed therebetween. The cylinders are stored in the orifices of the wear part, whereas the screwing of the two cylinders deforms the sheath into the housing of the support. Connection by such devices lacks rigidity, efficiency and reliability. In particular, the cylinders are not placed in the systemically rearward contact position to ensure support of the toothed portion.

US-A-2007 261 278 discloses another connecting device arranged between a wear part and its support. The apparatus includes a deformable sheath disposed between two washers that are positioned in turn between two cylindrical members. Screwing of the two cylindrical members deforms the sheath in the housing of the support. These connection devices are similar in operation but have a more complicated structure than before.

It is an object of the present invention to provide an improved connection device for eliminating impact-type operations for assembly and disassembly of the wear parts. More particularly, the present invention relates to a high performance, secure, strong, simple and practical connection device by means of a key.

To this end, the invention relates to a machine system comprising a support, a wear part and a connection device between the wear part and the support, in particular a connection device between the supports of a bucket tooth part belonging to a construction machine, Two orifices exposed on opposite sides of the housing, the connecting device comprising:

A key comprising a body extending lengthwise along a key axis between the threaded foot and the head

A nut engageable on the threaded foot of the key, and

A first end pressed against the head, a second end pressed against the nut, and an insertion configuration of the attachment and locking characterized in that a sheath is provided between the foot and the nut of the key in a threaded configuration between the key and the configuration, with the wall being adjustable by deformation in the housing of the support,

The machine system comprises:

- centered on the central axis of said housing, A first portion extending radially beyond 180 degrees and a second portion connected to the first portion and offset radially with respect to the central axis, In the insertion arrangement, the connecting device passes through the second part of the orifice and does not apply a clamping force on the wear part,

In the fastening arrangement, the key axis is substantially aligned along the central axis of the housing, the wall of the sheath is adjusted in the housing, and the connecting device exerts a clamping force on the wear part.

Thus, the present invention makes it possible to firmly connect between the wear parts, in particular the bucket teeth and the support, which are fairly simple and have high performance. Due to the shape of the orifices exposed on both sides of the housing formed in the support, the device can press the toothed portion against the support in the fastening arrangement. The key, the nut and the sheath can be removed from each other in the insertion configuration and can be fixed in the fastening arrangement. As a result, the connection device according to the present invention is easy to manufacture and use. The mechanical system can be assembled and disassembled much more quickly with the risk of injury being reduced.

According to another advantage of the present invention, in view of single or combination,

The central axis traverses the fitting direction of the abrasive part on the support, and is preferably perpendicular to the direction of the fastening.

The second part is centrally located on the auxiliary axis which is parallel to the central axis and offset radially and the auxiliary axis is preferably offset in the direction parallel to the central axis and opposed to the direction of engagement of the wear part on the support.

The wear part comprises two bearing orifices which, when the wear part is mounted on the support, are located directly opposite the second part of one of the orifices of the housing of the support, respectively, and in the fastening arrangement, The connecting device applies a fastening force to the bearing orifice.

Each bearing orifice includes a recess in which one of the head or nut is partially received in the engagement arrangement.

In the fastening arrangement, the head and the nut are partly framed and framed radially with respect to the central axis of the housing by the first part of the orifice.

- the plane is formed on the nut, and the plane is suitable to be accommodated in at least the insertion part of the wear part.

- The key has the center of gravity located on the key axis.

The invention also relates to a construction machine comprising at least one mechanical system as described above. In practice, the buckets generally comprise a series of supports, each of which receives a toothed portion, which acts like a wear portion and is fixed to its support by a connecting device. Alternatively, the machine system according to the invention can be mounted on other construction machine equipment.

Finally, the present invention relates to a method of implementing a mechanical system as described above. The method is characterized in that it comprises the following steps:

a) positioning a sheath around the body of the key;

b) positioning the nut on the foot of the threaded shape of the key;

c) positioning the abraded portion on the support;

d) positioning the connecting device in an insertion arrangement which places the connecting device in the housing of the support, passes through the second part of the orifice and does not apply any clamping force on the wear part;

e) screwing the threaded foot of the key into the nut to deform the cistern within the housing;

f) stopping rotation of the screw in a fastening arrangement in which the key axis is substantially aligned with the central axis of the housing, the wall of the sheath is adjusted within the housing and the connecting device applies a clamping force on the wear portion;

It is an object of the present invention to provide an improved connection device for eliminating impact-type operations for assembly and disassembly of the wear parts. More particularly, the present invention relates to a high performance, secure, robust, simple and practical connection device by means of a key.

1 is an exploded perspective view of a mechanical system according to the invention comprising a support to be secured to a bucket partially shown, a wear part, and a connection device for connecting the wear part and the support, And is shown including a cis, a threaded key and a nut;
2 is an exploded perspective view of the connection device;
3 is an assembled perspective view of the connection device in the insertion arrangement;
4 is an assembled perspective view of the connection device in the fastening arrangement;
5 is a side view in accordance with arrow V in Fig. 1, showing the connecting device of the mechanical system and the insertion arrangement;
6 is a view similar to Fig. 5, showing the connecting device of the mechanical system and the fastening arrangement; Fig.
- Figures 7 and 8 are views similar to Figures 5 and 6, respectively, with the wear parts not shown;
- Figures 9 and 10 are front views, respectively, taken with arrow X in Figure 7 and arrow IX in Figure 8;
11 and 12 are cross-sectional views taken along line XII-XII in FIG. 9 and line XI-XI in FIG. 10; And,
13 and 14 are cross-sectional views taken along line XIV-XIV in Fig. 7 and line XIII-XIII in Fig. 8, respectively;

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be more clearly understood from the following description, which is made with reference to the accompanying drawings, which are provided by way of a non-limiting example only.

1 to 14 illustrate a mechanical system 1 according to the present invention which equips a construction machine bucket G.

The mechanical system 1 comprises the adapter 30 between the support 10 and the teeth 20 as well as the adapter-support 10, the tooth-type abrasive part 20. The system 1 not only extends substantially along the axis X1 along which the first direction D1 for fitting of the teeth 20 is defined on the support 10 along the axis X1 but also the teeth 20 substantially parallel to and opposite to the first direction D1 and in a second direction D2 opposite thereto.

The bucket G is shown in part in Fig. 1 for simplification purposes. The support 10 is fixed to the bucket G while the tooth 20 is a wear part designed to be disassembled when it is considerably worn by operation of the bucket G. [

The connecting device 30 includes a nut 60 located on both sides of the sheath 40 and the sheath 40 as well as a threaded key or thread 50. In the insertion arrangement A shown in Figs. 3, 5, 7, 9, 11 and 13, the device 30 can be inserted into the housing 14 of the support 10. By screwing the nut 60 and the key 50 in the direction of rotation R1, as shown in Figs. 4, 6, 8, 10, 12 and 14, The sheath 40 inserted between the key 60 and the key 50 is deformed from the insertion arrangement A to the engagement arrangement B.

Thus, the device 30 is adjustable between the insertion arrangement A and the fastening arrangement B, and in the insertion arrangement A, on the one hand, the sheath 40 is not in contact, While the device 30 does not apply any bearing force on the teeth 20 and in the fastening arrangement B the device 30 and more particularly the key 50 and the nut 60, Is supported against the mold (20) and thus forms a coupling connection between the tooth (20) and its support (10).

To enable the identification of different parts of the machine system 1 spatially: a front face 2 on which the teeth 20 are arranged, a rear face 3 on which the supports 10 are arranged, A first face 5 for insertion of the device 30 into the interior of the support 10 and a second face 6 opposite the insertion face 5 are defined.

The support 10 comprises a base 11 partially shown in Figures 1 and 5 to 14 as well as a clamping nose (not shown) provided for coupling to a cavity of a tooth 20, nose (12). Further, a housing 13 for receiving the lugs 23 of the tooth 20 is formed on the first and second sides 5, 6, respectively. Each housing 13 includes walls arranged toward the rear face 3, the upper face 4 and the lower face and is opened towards the front face 2 to receive the lugs 23. [ The housing 14 extends through the nose 12 between the first face 5 and the second face 6 along an axis X14 perpendicular to the axis X1. This housing is framed by the housing 13 on the first side 5 and the second side 6.

Two orifices 16 are formed on the first face 5 and the second face 6 of the nose 12 and are exposed on both sides of the housing 14 along the axis X14. Each orifice 16 includes a first portion 17 and a second portion 18 interconnected. The first part 17 is centered on axis X17 which is coupled to axis X14 and becomes a half-cylinder which is 180 ° towards the rear face 3 and open towards the front face 2. [ The second portion 18 is a cylindrical portion which is centered on a secondary axis X18 which is off center of the X14 and X17 axes and which is surrounded by more than 180 degrees towards the front face 2 and towards the rear face 3 17). As shown in Fig. 7, the sub-axis X18 is radially offset in the direction D2, parallel to the axis X14, along the radial gap e18, opposite the engaging direction D1. The axis X14, axis X17 and axis X18 are located in the same middle plane Pm10 of the support 10. The orifice 16 has a generally rectangular shape extending along the axis X1 as a whole. The second part 18 is connected to the housing 14 through the second part 18 in the insertion arrangement A while the device 30 is received in the first part 17 in the fastening arrangement B. To facilitate insertion of the first portion (17) of the first portion (17).

Although not shown in the drawings, the orifice 16 may have other forms suitable for the present application. For example, the first portion 17 may be an angularly encircling cylindrical portion of less than 180 degrees in direction D1, i.e., may extend radially at an angle greater than 180 degrees about axis X14 have. According to another example, the first portion 17 may be a cylindrical portion closed in a slightly inclined direction with respect to the axis X1.

The tooth portion 20 includes an active part 21 disposed toward the front surface 2 and a hollow part 22 disposed along the rear surface 3. The tooth surface of the tooth part 20, In other words, the working portion 21 is provided for scratching and removing materials such as, for example, dust or gravel, while the hollow portion 22 is provided for fastening the teeth 20 of the support 10 do. More specifically, the hollow portion 22 includes an internal cavity that is fastened on the nose 12 of the support 10, as shown in Figures 1, 5, and 6, As shown in Figure 6, includes a lug 23 that contacts the top surface 4 and the bottom surface, is disposed toward the back surface and is provided to be received within the housing 13.

An orifice 24, each having a generally cylindrical shape, is formed in each of the lugs 23 on either side of the first side 5 and the second side 6 of the tooth 20. This orifice 24 is located directly opposite the second portion 18 of the orifice 16 when the toothed portion 20 is fastened to the support 10 so that the device 30 is positioned within the housing 14 Inserted, and used. The lugs 23 and orifices 24 disposed on the first side 5 are shown in Figures 1, 5 and 6. The lugs disposed on the second side 6 are similar to the lugs 23 disposed on the first side 5 while the orifices 24 disposed on the second side 6 are aligned with the plane 64 Is provided to receive the provided nut 60, for example, against a shoulder perpendicular to the axis X1. Alternatively, these orifices 24 and / or recesses 25 may have other shapes according to the present invention. The orifice 24 is provided for receiving the device 30 and more particularly the key 50 and the nut 60 associated with the tooth 20 in the direction D1 in the later described fastening arrangement B, Respectively.

The sheath 40 is formed of an elastically deformable material, such as, for example, an elastomer. The sheath 40 extends along a central axis X40 between a longitudinal end 41 and an end 42. In the insertion arrangement A, the end portion 41 is located on the first side 5, while the end portion 42 is located on the second side 6. This distinction is made only for spatial identification, as the ends 41,42 can be inverted. Sheath 40 includes radially curved wall 43 which is centered on axis X40 and opposes axis X40. The wall 43 defines an outer surface 44 which forms an ellipsoid of revolution about an axis X40 cut at the ends 41,42. The wall 43 is also located on the axis X40 and is present at the ends 41 and 42 and is provided with a radial gap formed between the sheath 40 and the key 50, , And the inner cavity (45). In practice, the housing 14 and the outer surface 44 have a generally complementary shape in the fastening configuration B, which is such that the wall 43 of the sheath 40 is closely attached to the inner contour, (14). ≪ / RTI >

The key 50 is formed of a metal, such as, for example, steel. The key 50 includes a body 53 extending between the head 51 and the threaded foot 52 along the axis X50. The head 51 includes a hexagonal portion 54 for operation by a tool not shown in the figure for simplicity and a first cylindrical portion 55 associated with the orifice 24 of the tooth 20, A second cylindrical portion 56 having a smaller diameter than the first cylindrical portion 55 and a second cylindrical portion 56 formed radially along the axis X50 between the first cylindrical portion 55 and the second cylindrical portion 56 And an annular shoulder 57 facing the threaded foot 52. The center of gravity of the key 50 is located on the axis X50. With the exception of the threads and hexagonal portion 54 of the threaded foot 52, the key 50 is a rotating portion about an axis X50 without any off-center portion.

The nut 60 is formed of a metal, such as steel, similar to the key 50, for example. The nut 60 has a first cylindrical portion 61 which is supported by the orifice 24 of the tooth 20 as well as a second cylindrical portion 62 which is smaller in diameter than the first cylindrical portion 61 . The first cylindrical portion 61 and the second cylindrical portion 62 are arranged in a coaxial relationship and are centered on the axis X60. The nut 60 also includes an annular shoulder 63 formed between the first cylindrical portion 61 and the second cylindrical portion 62 and formed radially with respect to the axis X60. A flat 64 is formed in the first cylindrical portion 61 and is perpendicular to the axis X60 as well as a first planar face that is radially offset and parallel to the axis X60, And a second planar face located on the opposite side of the portion 62. In other words, the plane 64 is open to the first cylindrical portion 61 but not to the second cylindrical portion 62, and the nut 60 located in the lug 23 and the second 60 of the tooth 20 To form a stop for the orifice (24) located on the face (6). A tapping 65 is formed in the nut 60 along the axis X60 and appears in the second cylindrical portion 62 but is not exposed to the first cylindrical portion 61 as much as possible. The tapping 65 is complementary to the threading of the threaded foot 52 of the key 50.

The operation of the connection device 30 equipped with the mechanical system 1 is as follows.

In the first step a), the operator places the sheath 40 on the key 50. The main body 53 is located in the inner cavity 45 and is surrounded by the wall 43 and the end portion 41 is supported with respect to the head 51.

In a second step b), the operator places the nut 60 at the end of the key 50 by means of annular shoulders 63, 57 facing each other. The tapping 65 rotates and feeds over the threaded foot 52 with the sheath 40 interposed between the head 50 and the nut 60. The end portion 41 is supported against the shoulder 57 and the end portion 42 is supported against the shoulder 63. The wall 43 is fixed on the second cylindrical portion 56 of the end portion 41 on the radial side with respect to the axis X40 and on the second cylindrical portion 62 of the end portion 42 on the other side have. The connection device 30 is assembled as shown in Fig. 3 in combination with the axis X40, the axis X50, and the axis X60. These axes are designated consecutively according to reference X50.

In a third step c), the operator places the tooth 20 on the support 10. The working portion 21 is adapted to be able to scrape off and remove material during operation of the system 1. The hollow portion 22 is aligned on the nose 12 such that complementary planes are supported against each other. The lugs 23 are received in the housing 13 of the base 11. The orifice 24 is located directly opposite the orifice 16 on the first and second sides 5 and 6 as the housing 14 is close enough to insert the device 30 into the insertion arrangement A. .

In a fourth step d), the operator places the preassembled connection device 30 in the housing 14 of the support 10. The device 30 passes through an orifice 24 and then through an orifice 16 located on the first side 5 starting at the nut 60 and ending at the head 51 and passing through the sheath 40 Is in a partially deformed state. The plane 64 of the nut 60 is received in an orifice 24 on the second side 6 and the head 51 is located in the orifice on the first side 5.

The device 30 is located in the insertion arrangement A and more specifically the key 50 and the nut 60 are moved in the first direction D1 as the support 10 and the tooth 20 are relatively unlocked It does not apply any retaining force on the tooth 20. The device 30 passes through the second portion 18 of the orifice 16 and the center axis X50 is aligned with the minor axis X18. In other words, the axis X50 is offset radially as viewed in the second direction D2 and is parallel to the central axis X14 of the housing 14. The play is generally formed between the first cylindrical portion 55 and the second portion 18 of the orifice 16 located on the first side 5. The first cylindrical portion 55 is not in contact with the inner diameter of the orifice 24 located on the first surface 5, or only partially.

In this step, as shown in Figs. 5, 7, 9, 11 and 13, the axis 14, the axis X17, the axis X18 and the axis X50 correspond to the middle plane Pm10 of the support 10, ). Nevertheless, except for the plane 64, the connection device 30 is emitted from the system 1. That is, the axis X50 moves in and out of plane Pm10.

In a fifth step e), the operator deforms the sheath 40 into the housing 14 by screwing the key 50 into the nut 60. More specifically, the operator is able to adjust the torque about the axis X50 of the rotational direction R1 at the portion 54 of the head 51 so that the threaded foot 52 penetrates the tapping 65 Use the tools you use. The nut 60 is held adjacent the plane 64 of the orifice 24 located on the second side 6. The rotational direction R1 may be identified by marking on the head 51 of the key 50, not shown for simplicity, to facilitate the operation of the operator.

Thus, the apparatus 30 goes from the insertion arrangement A to the fastening arrangement B. The rotation R1 of the key 50 gradually brings the head 51 adjacent the nut 60 so that the sheath is compressed along the axis X50 between the shoulder 57 and the shoulder 67. [ The wall 43 is deformed by emphasizing the curvature at the middle portion, that is, the middle portion between the shoulder 57 and the shoulder 63. [ 11 and 12, the outer surface of the sheath 40 is gradually supported against the inner wall of the housing 14, and firstly on the front surface 2, The second face 6, and the rear face 3, respectively. At the same time the head 51 and the nut 60 are respectively moved in the direction D1 in the orifices 16 and 24 located on the first and second faces 5 and 6 respectively. As such, the axis X50 is offset in direction D1 until it is substantially aligned with the central orifice X14 of the housing 14. The cylindrical portions 55 and 61 are received in the corresponding portions 17 of the orifices 16 until they are supported in the direction D1 relative to the orifices 24 and 25.

Finally, in the sixth step f), the operator stops screwing the device 30 in the fastening arrangement B. The key axis X50 is then approximately aligned with the central axis X14 of the housing 14. The device 30 passes through a portion 17 of the orifice 16. The wall 43 of the sheath 40 is adjusted in the housing 14 of the support 10 with the surface 44 that is attached to the contour of the housing 14. The length LB of the sheath 40 smaller than the length LA is defined by the axial separation between the end portions 41 and 42 of the sheath 40 along the axis X50. Further, the maximum diameter DB of the sheath 40 larger than the diameter DA is partitioned around the key axis X50 by the surface 44. [ Deformation of the wall 43 is no longer possible, which results in the sheath 40 having a compressive strength and therefore a thread-engaging force that can be recognized by the operator.

In the fastening arrangement B, the head 51 and the nut 60 apply a fastening force to the teeth 20 in the direction D1, while the sheath 40 is also supported in the housing 14 in reaction, 20) and the support (10). Particularly, the fastening force applied by the device 30 to the teeth 20 in the direction D1 is indicated by the arrow F30 in Fig. Preferably, such force F30 is distributed symmetrically with respect to plane Pm10. The head 51 and the nut 60 are secured to the upper surface 4 and the lower surface by a portion 17 of the orifice 16 to limit unexpected movement of the transverse plane Pm10 during operation of the system 1. [ do. Further, the sheath 40 is made of a deformable material having sufficient rigidity to prevent or reduce the movement of the device 30 in the direction D2. In addition, the metal insert can be molded into the wall 43 of the sheath 40. In this condition, the device 30 is not tilted in the housing 14 in the fastening arrangement B.

When the mechanical force acts on the working portion 21 and the portion 22 of the tooth 20, the fastening arrangement B is provided with the connecting device 30, nose 12, lug 23, At the same time, by the wall of the main body 13.

Then, in the separation step g), the operator can use a tool to unscrew the device 30 in the direction opposite to the direction of rotation R1. The force applied by the device 30 on the support 10 on the teeth 20 is released from the fastening arrangement B toward the insertion arrangement A. [ The device 30 may then be removed from the system 1 and the coupling connection between the tooth 20 and the support 10 removed. Thus, after the wear of the toothed portion, the toothed portion 20 can be disassembled without the hammer, through an operation opposite to the mounting operation due to the device 30. [

The components of the connection device 30 may be configured differently without departing from the scope of the present invention. In practice, the components of the device 30 are specifically designed to withstand the wear of the system 1 during operation, as well as designed to withstand several assembly and disassembly operations using tools.

The length of the key 50 according to the axis X50 is such that both the operative portion 21 and the nut 60 are connected to the orifice 24 of the lug 23 when the system 1 is assembled, And does not protrude outward. 10, the head 51 of the key 50 is then protected by the lug 23 of the tooth 20.

According to yet another alternative not shown in the drawing, the portion (s) for operating the device 30 using one or more tools along the axis X50 are configured differently. For example, the first cylindrical portion 55 may include a circular or polygonal recess and may open outwardly on the first side 5 to facilitate tool penetration. According to yet another example, the nut 60 may be configured to be actuated by a tool on the second side 6. In that case, for example, it may be formed on a portion 61 of the flat 64 instead of a cavity or a hexagonal rod.

According to another alternative not shown in the drawing, as long as the device 30 applies sufficient fastening force F30 on the toothed portion 20 to the fastening structure B, the housing 14, the orifices 16 and 24, X14, and X18 may be configured or aligned differently from each other. For example, the housing 14 may not be cylindrical, but may include a planar bearing side for the sheath 40. According to yet another example, portions 17 and 18 of orifice 16 may have different shapes from Figures 7 and 8, but may be connected to each other. According to another example, the axis X14 of the housing 14 may not be perpendicular to the axis X1 but may be inclined in the lateral direction with respect to the axis X1. According to another example, the axis X14 and the axis X18 may be inclined by 10 or 20 relative to the axis X1. According to another example, the axis X14 and the axis X18 may be perpendicular to the axis X1 and may be located on both sides of the plane Pm10, respectively. The orifice portion 17 is disposed toward the lower surface of the nose 12 while the orifice portion 18 is disposed toward the upper surface 4 of the nose 12. In this case,

According to another example not shown in the drawing, the orifice 24 formed in the lug 23 may include a heat treatment of the area in contact with the reinforced shoulder and / or key 50 and the nut 60, This is to allow for increased surface strength and fastening of the device 30 in the fastening arrangement (B). Further, the orifices 20 for receiving the nuts 60 on the nut 60 and the second surface 6 may be constructed in any manner suitable for the present application, (50) is tightened to the tapping (65) in order to go to the step (B).

According to yet another alternative, not shown in the drawings, the metal insert may be disposed between the sheath 40 and the key 50 and may be molded directly into the wall 43. [

Further, technical features of other embodiments may be wholly or partly combined with each other. Therefore, the connection device can be applied in terms of cost and performance.

1: Mechanical system
10: Support
20: Wear portion
23: Lugs
30: connection device
40: Cis
50: Key
60: Nut

Claims (10)

The mechanical system 1 comprises a support 10, a wear portion 20 and a wear portion 20 and a support 10 of the wear portion, in particular a bucket tooth 20 belonging to the construction machine G and a support 10 , Wherein the support (10) comprises two orifices (16) appearing on both sides of the housing (14) for receiving the connection device (30), the connection Apparatus 30 includes:
- a key (50) comprising a body (53) extending along a key axis (X50) between a threaded foot (52) and a head (51)
- a nut (60) screwable onto the threaded foot (52) of the key (50), and -
A first end 41 which is formed of an elastically deformable material and which is arranged around the body 53 and which is urged against the head 51 and a second end which is pressed against the nut 60 42 between the threaded foot 52 of the key 50 and the nut 60 between the insertion arrangement A of the connection device 30 and the fastening arrangement B, A wall (43) adjustable by deformation in the housing (14) of said support (10), said sheath (40)
The machine system (1) comprises:
- the orifices (16) of the housing (14) through respectively:
A first part 17 which is centered on the central axis X14 of said housing 14 and which extends radially more than 180 degrees about said central axis X14,
- a second portion (18) connected to said first portion (17) and offset radially with respect to said central axis (X14)
In which the connecting device 30 passes through the second part 18 of the orifice 16 and does not apply a clamping force on the wear part 20,
Wherein the key axis X50 is substantially aligned along the central axis X14 of the housing 14 and the wall 43 of the sheath 40 is in contact with the housing 14 14), the connecting device (30) being adapted to apply a clamping force on the wear portion (20)
≪ / RTI > The method according to claim 1,
Characterized in that the central axis X14 intersects the fastening direction D1 of the abrasion part 20 on the support 10 and is preferably perpendicular to the fastening direction D1. . 3. The method according to claim 1 or 2,
Characterized in that the second part (18) is centrally located on the auxiliary axis (X18) parallel to the radial direction and parallel to the central axis (X14), the auxiliary axis (X18) Is offset in the direction (D2) with respect to the central axis (X14) and is opposed to the fastening direction (D1) of the wear part (20) on the support (10). 4. The method according to any one of claims 1 to 3,
The abrasive part 20 comprises two bearing orifices 24 and the two bearing orifices 24 are formed in the bearing 10 so that when the abrasive part 20 is fastened to the support 10, In the fastening arrangement (B) located directly opposite the second part (18) of one of the orifices (16) passing through the housing (14), the connecting device (30) 24) is applied with a fastening force (F30). 5. The method of claim 4,
Characterized in that each of said bearing orifices (24) comprises a recess (25) in which one of said head (51) or said nut (60) is partially received in said fastening arrangement (B). 6. The method according to any one of claims 1 to 5,
In the fastening arrangement (B), the head (51) and the nut (60) are partially framed and the first part (17) of the orifice (16) Is radially framed with respect to the first axis (X14). 7. The method according to any one of claims 1 to 6,
A plane 64 is formed on the nut 60 and the plane 64 is adapted to be received at least in the insertion arrangement A of the abrasion portion 20. [ 8. The method according to any one of claims 1 to 7,
Wherein the key (50) has a center of gravity located on the key axis (X50). A construction machine bucket (G), comprising at least one mechanical system (1) according to any one of the claims 1 to 8, 10. A method for implementing a mechanical system (1) according to any one of claims 1 to 8,
a) positioning the sheath (40) about the body (53) of the key (50);
b) positioning the nut (60) on the threaded foot (52) of the key (50);
c) positioning the wear portion (20) on the support (10);
d) positioning the connection device (30) in the housing (14) of the support (10), passing through the second part (18) of the orifice (16) Positioning the connecting device (30) in an inserting arrangement (A) that does not apply a clamping force;
e) deforming the sheath (40) in the housing (14) by threaded rotation (R1) of the threaded foot (52) of the key (50) within the nut (60);
f) the key axis X50 is substantially aligned with the central axis X14 of the housing 14 and the wall 43 of the sheath 40 is adjusted in the housing 14, The apparatus (30) comprises a step of stopping the screw rotation (Rl) on the fastening arrangement (B) applying a fastening force (F30) on the wearer (20) A method for implementing.

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