CN112648273A

CN112648273A - Component for a fastening system and fastening system comprising such a component

Info

Publication number: CN112648273A
Application number: CN202011040085.8A
Authority: CN
Inventors: 米歇尔·库姆; 伊曼纽尔·维纳
Original assignee: Illinois Tool Works Inc
Current assignee: Illinois Tool Works Inc
Priority date: 2019-10-09
Filing date: 2020-09-28
Publication date: 2021-04-13
Also published as: FR3101826A1; FR3101826B1; DE102020123049A1

Abstract

A component (1) intended to cooperate with a post (4) to form a fastening system between two elements (2-3), said component comprising: -a body (6) comprising a flat base (9) and a cavity (7) for housing the post (4); -a retaining member comprising several retaining tabs (8) extending from said body (6) towards the inside of said cavity (7), said retaining tabs comprising a flexible main portion (19) forming a spring exerting a return force on said distal portion of said tabs towards said axis when said distal portion (20) is away from said central axis (X); characterized in that the distal portion (20) of each retention tab (8) forms a blade arranged to bite into a material of lower hardness than the material of the retention tab (8), and the radially inner edge (21) of the blade follows a helical portion spiraling around a central axis (X) at a given inclination with respect to a plane parallel to the base (9).

Description

Component for a fastening system and fastening system comprising such a component

Technical Field

The present invention relates to the production of a releasable fastening system for assembling a plurality of elements to one another, in particular elements at least partially in the shape of panels, in particular bodywork elements, more particularly removable parts cooperating with pins to form such a releasable fastening system.

Background

Known fastening devices for fastening elements to door panels (e.g., a header of a pin or a star lock washer arrangement on a post exposed from the panel) are easy to implement and inexpensive. In particular, when the door panel is made of a plastic material, it is easy to place the fastening studs in the desired positions when manufacturing said panel. At assembly, the fastening tabs, which mate with the elements to be fastened, must be threaded onto the fastening posts and then only a heading operation or the use of a star lock washer is required.

Unfortunately, at this point, the component cannot be easily removed from the door panel without damage or loss of the apparatus, which results in scrapping of the entire panel.

Further, it is difficult to control the quality of heading, and there is an influence on the resistance to lateral impact, etc. In the case of repair, the header is replaced by a screw, which results in high costs.

It is an object of the present invention to provide a device for simply and reliably fastening an element to a pillar exposed from, for example, a panel of a motor vehicle (e.g. a vehicle door panel), which device allows easy and inexpensive removal and reinstallation. The fastening must ensure the coupling of the element to the panel and its function in all cases in which stresses are present on said panel, such as the opening and closing of the door or the vibrations during the running of the vehicle. Removal of the fastening means must be done without damaging the post and thus allows reinstallation.

Disclosure of Invention

The invention therefore relates to a component intended to cooperate with a post emerging from a substantially flat surface of a first element to form a system for fastening a second element, the component comprising:

-a body comprising a flat base and a bore exposed through said base, said bore leaving a cylindrical passage around a central axis at right angles to said face for receiving the post;

-a retaining member comprising several similar retaining tabs, at least two of which extend from the body towards the inside of the bore and are evenly distributed in an orientation around the central axis, said retaining tabs comprising a flexible main portion, the radially outer end of which is fixed with respect to the body and the radially inner end bears a distal portion intended to be pressed against the post, said main flexible portion being inclined radially in an axial direction opposite to the base and forming a spring which exerts a return force on the distal portion towards the axis when the distal portion is away from the central axis.

It is worth noting for this section that the distal portion of each retention tab forms a blade arranged to bite into a material of lower hardness than that of the retention tab, and the radially inner edge of the blade follows a helical portion spiraling around the central axis at a given inclination with respect to a plane parallel to the base, the characteristics of said helix being the same for all retention tabs.

The feature of the main portion of the retention tab of the retention member is such that with respect to the star lock washer, a post of appropriate diameter can be slid into the bore along this axis through the base of the body and then prevented from sliding in the opposite direction by pressing the distal end portion against the post in such a way that the distal end portion becomes more robust when a force in the opposite direction is applied on the post. Thus, the second element may be secured to the first element by fitting a flat portion of the second element around the post, and then pressing against a component that has previously been screwed around the post to urge it towards the surface of the first element.

Furthermore, if the part is rotated around the post, the presence of the blades at the end of the holding tabs and their shape creates a groove forming the thread, since the material of the post is softer than the material of the holding tabs. Such a thread allows the component to be removed by unscrewing the component around the post. Once removed, the component leaves a thread on the post that does not prevent the post from being reused with the same component, for example, to secure a second element that needs to be replaced. In fact, the part will be able to slide onto the post again by itself, regardless of the position of the blade relative to the thread groove. Thus, for example, as a first element, a door panel can be used which has a fastening stud made in one piece with the panel, without the fastening stud having to be scrapped when replacing the second element fastened thereto.

Furthermore, the formation of the thread makes it possible to screw the component onto the post after pressing it against the wall of the second element. This makes it possible to increase the pressure exerted between the two elements by the coupling system. This provides advantages in terms of robustness of the coupling, impact resistance and reduction of wandering vibrations.

Advantageously, the helix about the axis has a small helix angle, preferably between 5 and 8 degrees relative to the plane of the base of the body. This corresponds to a thread that can control the degree of tightening and hold the component in place on the post. Also advantageously, the helix turns in a clockwise direction when the component is viewed through the base, which corresponds to the general tightening direction.

At least two opposing holding tabs are required to capture the post and ensure the capture. Advantageously, three or more evenly distributed holding tabs allow the post to be naturally centered between the holding tabs.

Preferably, the blade of the distal portion is formed by a lamella which is radially inclined towards the base of the body, preferably according to an angle at least equal to 5 degrees with a plane parallel to the base of the body.

The inclination of the blades with respect to the extraction force along the axis facilitates the fixing of the column by the radially inner edge.

Even more preferably, the sheet forms a major portion of each retention tab and is folded at its free end through approximately 90 degrees to form a distal portion.

Advantageously, the radially inner edge of the blade intended to come into contact with the post is cut by a transverse surface cut through the thickness of the blade, inclined towards the base of the body, preferably forming an angle less than or equal to 45 degrees with a plane parallel to the base of the body.

The inclination of the transverse surface on the radially inner edge of the blade makes it possible to cut the material of the post to form the thread. Furthermore, the presence of the contact surface on the edge of the blade makes it possible to scribe a clear groove in the axial direction forming a thread with a good retention surface. The smaller the difference between the stiffness of the material of the holding tab and the stiffness of the post, the more preferred is to increase the inclination with respect to the plane of the base.

Advantageously, for each retention tab, the inner wall of the body in the cavity forms an abutment limiting the separation of the distal portion in the radial direction.

Preferably, the blade of the distal portion is not inclined in a direction opposite the base when the retention tab is in place against the wall. This avoids accidental crimping when inserting the component around the post, which could affect the retention function and even damage the component.

Preferably, the holding tab is made of metal.

This metal ensures both a higher hardness than most plastic materials that can be used for panels in vehicles and a good elasticity of the main part of the retaining tab.

Even more preferably, the retention tabs are formed from a material having a metallic inner ring surrounding the bore and inserted into the body.

This gives the holding member a rigid inner ring which ensures good stability of the parts surrounding the column when the coupling is formed.

Advantageously, the body is formed from a plastics material.

This provides at least two advantages. On the one hand, plastics absorb vibrations better than, for example, metals; thus, the fastening does not become a source of wandering vibration. On the other hand, the manufacture of parts made of plastic is inexpensive and can be done by moulding.

Advantageously, in the case where the retaining member comprises an inner ring forming a ring supporting the retaining tabs, the surface of the ring cooperates with the geometry of the body to form the means for rotationally positioning one with respect to the other. This facilitates manufacture by over-moulding of the body around the retaining member and also makes it possible to apply a significant force when tightening the component around the post.

Advantageously, the bore passes through the body. This allows the manufacture of a very small volume flat portion that can accommodate posts of different heights.

Advantageously, the body comprises a post-positioning abutment arranged in the cavity so as to arrange the latter on the axis, said abutment extending axially around the position of the distal portion of the retention tab.

Preferably, the body carries on the periphery a ring of compensation tabs inclined towards the base, so as to position the free ends of the compensation tabs at the level of the plane of the base or below with respect to the body.

In practice, the free end of the compensation tab is slightly lower than the base. When pressure is exerted on the base against the surface of the second element, the free end of the compensation tab may be displaced by the elasticity of the material to the same plane as the base on the surface of the second element. This generates a repulsion force along the axis of the post, which puts the holding tab under tension against the post, which enhances the quality of the coupling between the two elements at the level of the fastening system.

Advantageously, the body comprises at least two outer surfaces arranged to provide a catch enabling torque to be applied about the central axis.

Thus, the components on the post can be easily tightened or loosened using a suitable tool.

The invention also relates to a system for removably coupling a first mechanical element to a second mechanical element, the first and second mechanical elements preferably being bodywork elements, the system comprising a component as described previously, a post emerging from the first mechanical element, being cylindrical with a circular section having a radius suitable for passing between the retaining tabs by moving them away from the central axis, said post being made of a material of lower hardness than the material of the retaining tabs, preferably a plastic material, and a panel of the second mechanical element having an opening configured to be passed through by the post while forming an obstacle for obstructing the passage of the base of the component therethrough when the component is screwed around the post.

The panel of the second element may comprise a perforation configured to be penetrated by the post, or a notch enabling sliding of the panel along the first element to position it around the post.

Preferably, the post is made in one piece with the first member.

Drawings

Other features and advantages of the invention will become apparent upon reading the following detailed description, in order to understand the detailed description, reference will be made to the accompanying drawings, in which:

FIG. 1 is a perspective view of a component according to the present invention;

fig. 2 is a plan view of the component of fig. 1 as viewed from the side opposite to the base in the axial direction;

FIG. 3 is a bottom view of the components of FIG. 1 as viewed from the base;

FIG. 4 schematically shows an axial cross-section of a retention tab of the component of FIG. 1;

FIG. 5 schematically shows a side view of a portion of the retaining member of the component of FIG. 1, showing the angle formed by the free end of the retaining tab and a plane at right angles to the central axis;

fig. 6 is a perspective view schematically showing a first mechanical element with a post, and a perforation facing a second element placed in order to slide the second element around the post, the part being shown proportionally above the two elements;

fig. 7 is a perspective view schematically showing the second element positioned around the column pressed against the first element and the component arranged facing the column by means of a handling tool;

FIG. 8 is a schematic axial cross-sectional view of two elements and components in place according to FIG. 7;

FIG. 9 is a perspective view schematically illustrating the component sliding around the post and being pressed against the second component surface by the handling tool after the step illustrated in FIG. 7;

FIG. 10 is a schematic axial cross-section of two elements and components in place according to FIG. 9;

FIG. 11 is a perspective view schematically showing the component sliding around the post and unscrewing from the post for removal after the step represented in FIG. 9;

FIG. 12 is a schematic axial cross-section of two elements and a part during the step represented in FIG. 11, wherein the part is separated from the second element;

fig. 13 is a perspective view schematically showing that after the removing operation, the part is detached from the post and the post is exposed from the second element;

fig. 14 is a schematic axial cross-section of two elements and components in place according to fig. 13.

Detailed Description

In the following description, the component 1 according to the invention (fig. 6 and 7) is used to implement a removable fastening system between a first mechanical element 2 and a second mechanical element 3, such as for example a door panel and a decorative element of the panel, respectively, a badge, insert or other element on a vehicle body at least partially in the shape of a panel, that is to say with at least one coupling sub-component in the shape of a panel. Here, the door panel 2 is made of plastic material and comprises one or more studs 4, which are made in one piece with the rest of the panel, while the second element 3 comprises at least one sub-part in the shape of a panel, which has perforations 5 so that it can be fitted around one of the studs 4 of the first element 2.

With reference to fig. 1 to 3, the component 1 according to the preferred mode of the invention comprises a body 6 made of plastic perforated with a through-going bore 7 and a metal retaining member comprising retaining tabs 8 extending inside this bore 7. The whole is rotated about the central axis X.

The body 6 made of plastic comprises a base 9 inscribed in a plane at right angles to the axis and limiting the extension of the body of the component 1 in the direction of the central axis X.

In the figure, the central axis X is oriented from the base 9 towards the side opposite to the body 6. Also, the qualifiers "top" and "bottom" can be used hereinafter to designate an object situated in the direction in which the axis X is directed or an object situated in the opposite direction, respectively.

The external shape of the body 6 starting from the base 9 gives it here the general shape of a hexagonal nut centred on the axis X. In this example, the body 6 therefore comprises six flats 10 distributed around the central axis X at right angles to the base 9. These six flats 10 can cooperate with a wrench-shaped tool 11 to rotate the component 1 about the central axis X (fig. 7, 9 and 11).

Two substantially triangular compensation tabs 12 start along the axis X towards the outside of each of these flats 10 at about the middle height of the body 6. Here, these holding tabs 12, which are substantially triangular, are inclined so that the bottom of the holding tab tip, which forms the free end 13 of the holding tab, is located at the level of the plane of the base 9 of the body 6, preferably slightly below this plane. The compensation tab 12 is made in one piece with the rest of the body 6. The plastic material of the tabs gives them some flexibility so that if the base 9 of the body 6 is pressed against a surface, the position of its tip 13 can be slightly shifted in order to apply a tension on the component 1 in the opposite direction along the central axis X.

The bore 7 has a substantially cylindrical shape of circular cross-section about an axis. In an example, with reference to fig. 1, the walls of the body 6 in the cavity comprise: a first section 14 coupled to the base 9, which is circular in cross-section; and a second section 15 connected to the face opposite to the base 9, where the second section comprises six radial projections 16 distributed uniformly circumferentially. The radially inner ends of the projections 16 are spaced from the central axis X by a distance R1 which is the same for each projection. These projections 16 therefore form a centring abutment for the posts 4 inserted into the cavities 7 and having substantially the same radius R1.

Furthermore, three semicircular-section recesses 17 are cut in the axial direction in the walls of the two sections of the

walls

14 and 15 over the entire extension of the bore. These notches 17 are related to the presence of the retaining member and in the description thereof the function of these notches is explained.

In a preferred embodiment, the retaining member formed of metallic material comprises a ring 18 parallel to the plane of the base 9 of the body 6, where it supports three retaining tabs 8 extending into the cavity 7 towards the central axis X.

A ring 18 (a part of which is visible in fig. 3) is inserted into the plastic body of the component around the bore 7 at the coupling between the first section 14 and the second section 15 of the wall of the body 6 in the bore 7. The ring 18 surrounds the bore 7, leaving a circular passage around the central axis X with a radius greater than the radius R1 of the space between the abutments 16. Furthermore, the geometry of the circular channel may be arranged to cooperate with the geometry of the body 6 to prevent rotation relative to the body about the central axis X.

The ring 18 comprises recesses of semi-circular section which match the recesses 17 of the wall of the body 6 made of plastic in the cavity 7. The presence of these recesses corresponds to the facilities used for manufacturing the component 1. In practice, the manufacture of the body 6 is preferably done by moulding a plastic material around the ring 18 of the retaining member previously made of metal. The three circular recesses 17 are used to position the retaining member on the centre pin of the mould during overmoulding of the plastic body 6.

The ring 18 holding the holding tabs 8 forms a rigid inner ring for the holding member, also for the component 1 as a whole. The rigid inner ring avoids deformation and can absorb stronger forces in the direction of the axis X than a body made of plastic only.

Here, the retaining means comprise three metal retaining tabs 8 made in one piece with the ring 18, which are evenly distributed around the central axis X and extend inside the bore 7, inside the axial extension of the second section 15 of the wall of the body 6 and circumferentially between the projections 16 forming the abutment.

Referring to fig. 4 and 5, here, the holding tabs 8 are formed by tabs starting from the radially inner edge of the ring 18. The main portion 19 of the holding tab extends in the opposite direction to the base 9 of the body, forming an angle a slightly greater than 90 °, preferably 95 °, with the surface of the ring lying in a plane P parallel to the base 9. In other words, the main portion 19 extends towards the top by inclining radially towards the central axis X, moving away from the wall of the body 6 parallel to the axis X by a relatively small angle (α -90 degrees). At the end of this main portion 19, the lamina is bent substantially at 90 degrees towards the axis X, so as to obtain a distal portion 20 oriented towards the base 9 of the body by forming an angle substantially equal to a-90 degrees with a plane P parallel to the base 9.

With reference to fig. 5, it will be noted that the fold of the lamina between the main portion 19 and the distal portion 20 is slightly inclined with respect to a plane P parallel to the base 9 by an angle β preferably comprised between 5 and 8 degrees, according to a rotation around the central axis X in the same direction for all the holding tabs 8. This means that the distal portion 20 itself is inclined at the center of the holding tab 8 by the same angle β in a direction at right angles to the radial direction.

The free end of the distal portion 20 of each holding tab 8 is cut according to a cylinder parallel to the central axis X and having a radius substantially equal to the distance R1 of the abutment 16. Thus, the free end forms a radially inner edge 21 of the distal portion, which, when positioned substantially at a distance R1 from the central axis X, follows a helical portion having a radius substantially equal to the radius of the post 4 centred between the abutments 16; when the element 1 is viewed through the base 9, the helix will spiral in a clockwise direction. The helix has a helix angle corresponding to the angle β and is between 5 and 8 degrees with respect to a plane P parallel to the base 9.

Referring to fig. 4, the radially inner edge 21 is cut at substantially right angles to the flat piece of the distal section 20. The radially inner edge forms an angle substantially equal to α with a plane P parallel to the base 9 so as to be in contact with the column 4. The inner edge 21 is chamfered in the thickness of the sheet forming the distal section 20 to form a transverse surface 22 which forms an angle y of about 130 degrees with the plane of the distal section 20. This transverse surface 22 is therefore oriented towards the base 9 of the body 6 and forms an angle δ of about 45 degrees with a plane P parallel to the base 9. The transverse surface 22 allows the blade formed by the distal portion 20 to bite into the material of the post 4 and cut the material to form a groove as the member 1 is rotated about the post 4.

The illustrated inclination of the transverse surface 22 has been defined for a metal retaining member that retains the plastic post 4. The smaller the difference in stiffness between the holding tab and the post, the greater the benefit of increasing the inclination of said transverse surface, thus reducing the angle δ it makes with the plane of the base.

With reference to fig. 1, it can be seen that the distal portion 20 of each retention tab 8 is positioned between the axial ends of the second section 15 of the wall of the body 6 in the cavity, between the two radial abutments 16. The flexibility of the main portion 19 of the holding tab 8 allows the edges 21 of the distal portion 20 to separate to allow the post 4 to pass through. In contrast, the angle of the main portion 19 forming a smaller value (α -90 degrees) with the axial direction gives a shorter stroke of displacement of the distal portions 20, which, if they are separated from the central axis X, rapidly abut against the wall of the body 6 in the cavity 7.

The use of the component 1 according to the embodiment for fastening a second element 3 on a first element 2, such as a door panel, will be performed for example as described below.

With reference to fig. 7 and 8, the panel-type portion (for example, the fixing tab) of the second element 3, with suitable perforations 5, is arranged facing the post 4 of the first element 2, on which it must be fastened and then slid against the wall of the first element 2 by passing the post 4 through the perforations 5. Here, the first element 2 of this example is made of a plastic material and the fastening stud carried by the first element, which is made in one piece with the first element, is also made of plastic. The post 4 is shown as being hollow, but the post may be solid. The fastening member 1 is inserted into a tool 7 cooperating with six external axial flats 10 of the body 6 to hold it around its central axis X and then positioned facing the post 4 emerging from the second element 3. Fig. 8 shows in cross-section that when the central axis X of the component 1 matches the axis of the post 4, the radially inner edge 21 of the distal portion 20 of the holding tab 8 bends into the cylinder defined by the outer wall of the post 4.

Referring to fig. 9, the component 1 is then pressed against the wall of the second element 3 by screwing the exposed portion of the post 4 into the bore 7. The tool 7 may be used to apply pressure along the central axis X in the direction of arrow a in fig. 9 to tighten the coupling between the first element 2 and the second element 3.

It will be noted that in this operation, the projection 16 of the body forming the abutment comes into contact with the post before the post 4 comes into contact with the free edge 21 of the holding tab 8, so as to correctly centre the component 1 on the post 4. It will also be noted that the wall of the body 6 in the second section 15 of the cavity 7 limits the outward radial displacement of the distal portion 20 of each retention tab 8, thus avoiding outward tilting of the tabs 8 when a pulling force is exerted on the component 1.

Referring to fig. 10, at the end of this step, the main portion 19 of the holding tab 8 is bent to allow the passage of the post 4 and pushes the edge 21 against the outer wall of the post 4. Furthermore, the shape of the holding tabs 8 and their coupling with the ring 18 means that a movement tending to move the component 1 away from the wall of the second element 3 pushes the inner edge 21 of the distal portion 20 back inwards and will increase the holding force exerted by the radially inner edge 21. Thus, the component 1 is axially blocked in the direction of separation with respect to the two

elements

2 and 3, since it remains around the post 4.

Additionally, the compensation tabs 12 of the body 6 shown in fig. 9 maintain tension in the direction of separation. In this way, the device prevents loosening of the coupling between the two elements due to vibrations during operation of the vehicle, which would otherwise cause sliding of the radially inner edge 21 of the distal portion 20 due to the movement of the part 1 along the smaller axis of the post 4.

With reference to fig. 9, it is also possible to increase the tightness of the coupling after axial compression by screwing the component 1 on the post 4. In practice, by turning the part 1 according to arrow B using the tool 7, the distal portion 20 forms a blade, the edge 21 of which bites into the material of the post 4 and, by the helical shape of the edge 21, creates a start of the thread in this material, thus converting the rotary motion of the part 1 into an axial movement of the contrast second element 3 towards the base of the post 4.

Referring to fig. 11, after removal, the tool 7 is inserted around the component 1 and is rotated about the axis X according to arrow C in the opposite direction with respect to the assembly. Since the radially inner edges 21 of the distal end portions 20 of the holding tabs 8 are arranged under tension against the wall of the column 4, these radially inner edges are embedded in this wall. The radially inner edge creates a thread 23 on the post 4 for the same reasons as before. In this case, the thread 23 is produced in the opposite direction to the base of the column 4 and the rotational movement moves the component 1 away from the second element 3, as indicated in fig. 12.

At the end of the operation, as indicated in fig. 13 and 14, the part 1 is completely released from the post 4 and has produced a thread 23 on the post 4 up to its free end. The second element 3 can then be removed from the post 4 of the first element 2.

If then there is another second element to be fastened to the first element, the same component 1 can be put back onto the same post 4. As can be seen in fig. 13, the post 4 of the first element 3 now has a thread 23, but this does not prevent it from being reused. In fact, in this case, the component 1 is positioned facing the column 4 and pressed against the element 3 to put the coupling under tension, independently of the position of the thread 23.

The examples given for the use of the invention are not limiting. The invention can also be used to fix a second element to a first element whose post is made of metal, for example a car bonnet. This requires the use of such components: wherein the metal forming the retaining member is harder than the metal of the post.

The invention also relates to a variant embodiment of the component made of a single material, made of a material with a sufficiently high hardness with respect to the post to ensure locking of the retaining tab and removal by unscrewing.

Claims

1. A component (1) intended to cooperate with a post (4) emerging from a substantially flat surface of a first element (2) to form a system for fastening a second element (3), said component comprising:

-a body (6) comprising a flat base (9) and a bore (7) exposed through said base (9), said bore (7) leaving a cylindrical passage around a central axis (X) at right angles to the surface of said base (9) for housing said column (4);

-a retaining member comprising a number of similar retaining tabs (8), at least two of which extend from the body (6) to the inside of the bore (7) and are evenly distributed in an orientation around the central axis (X), the retaining tabs (8) comprising a flexible main portion (19) whose radially outer end is fixed with respect to the body (6) and whose radially inner end carries a distal portion (20) intended to be pressed against the post (4), the main portion (19) being inclined radially in an axial direction opposite to the base (9) and forming a spring exerting a return force on the distal portion towards the central axis (X) when the distal portion (20) is away from the central axis (X);

characterized in that the distal portion (20) of each retention tab (8) forms a blade arranged to bite into a material of lower hardness than the material of the retention tab (8) and the radially inner edge (21) of which follows a helical portion spiraling around the central axis (X) at a given inclination with respect to a plane (P) parallel to the base (9), the characteristics of which are the same for all retention tabs (8).

2. The component (1) according to claim 1, wherein the blade of the distal portion (20) is formed by a lamella which is inclined radially towards the base (9) of the body (6), preferably according to an angle at least equal to 5 degrees with a plane (P) parallel to the base of the body.

3. The component (1) according to one of the preceding claims, wherein the radially inner edge (21) of the blade intended to come into contact with the post (4) is cut with a transverse surface (22) cutting over the thickness of the blade, said transverse surface being inclined towards the base (9) of the body (6), preferably forming an angle less than or equal to 45 degrees with a plane (P) parallel to the base of the body.

4. The component (1) according to one of the preceding claims, wherein the holding tab (8) is made of metal.

5. The component (1) according to the preceding claim, wherein the retention tabs (8) are formed of a material having a metallic inner ring (18) surrounding the cavity (7) and inserted into the body (6).

6. The component (1) according to one of the preceding claims, wherein the body (6) is formed from a plastic material.

7. The component (1) according to one of the preceding claims, wherein the bore (7) passes through the body (6).

8. The component (1) according to one of the preceding claims, wherein the body (6) carries peripherally a ring of compensating tabs (12) inclined towards the base (9) so as to position their free ends (13) at the level of the plane of the base (9) or below with respect to the body (6).

9. The component (1) according to one of the preceding claims, wherein the body (6) comprises at least two outer surfaces (10) arranged to provide a catch enabling application of a torque around the central axis (X).

10. System for removably coupling a first mechanical element (2) to a second mechanical element (3), the first and second mechanical elements preferably being bodywork elements, the system comprising a component (1) according to one of the preceding claims, a post (4), and a panel of the second mechanical element (3), the post emerging from the first mechanical element (2), being cylindrical with a circular section having a radius suitable for passing between the retaining tabs (8) by moving them away from the central axis (X), the post being made of a material, preferably a plastic material, having a lower hardness than the material of the retaining tabs (8), and the panel of the second mechanical element having an opening (5) configured to be passed through by the post (4), while forming an obstacle for hindering the passage of the base (9) of the component (1) therethrough when screwed around the post.