DE102016004187A1 - Device for holding a component on a carrier part and use of a cutting element on a device for holding a component on a carrier part - Google Patents

Abstract

The invention relates to a device for holding a component on a support part, wherein the device comprises an expandable part with one or more expansion elements and an actuating part, wherein the expandable part and the actuating part are adapted and have one or more cams that the spreader at a relative movement of the operating part to the expandable part can be brought into a spread position, wherein the expandable part and / or the actuating part having one or more cutting elements, which are arranged such that they cut into the other part, when the actuating part and the expandable part are moved relative to each other.

Description

The invention relates to a device for holding a component on a support member and a use of a cutting element on a device for holding.

There are known fasteners for connection of plate-shaped parts, which consist of an anchoring part and a spreading part.

For example disclosed DE 29 35 369 A1 a fastener with an anchoring part and a spreading part. The anchoring part is designed with a retaining collar and can be inserted into fastening holes of plates to be joined, wherein the anchoring part can be anchored by means of expansion tabs. The expansion part can be inserted into the anchoring part. The expansion part has a rotary head, a rectangular cross-section expansion bolt for pushing apart the Spreizlappen and one, the rotary head with the expansion bolt connecting cylindrical neck. In the retaining collar of the anchoring part a rectangular recess of the cross section of the spreader pin and in the center of this recess on the longitudinal sides circular cutouts corresponding to the diameter of the neck are provided. Furthermore, arranged on the transverse sides of the spreader bolt at a distance from the bottom of the rotary head end spring leg whose shoulders engage when dipping the neck extension in the circular cut-outs under the collar edge.

In the DE 29 35 369 A1 the expansion part and the anchoring part are made of the same hard-elastic plastic and integrally connected by tear-off pouring points. The outer walls of the Spreizlappen run in the area below the turret parallel to each other, so that the plug-in socket can be inserted without resistance in the mounting holes of the plates to be joined.

A disadvantage of such a fastener that the expansion member, which spreads apart the Spreizlappen for exercising the attachment, can be unintentionally released from the anchoring part, so that the expansion part can no longer exert force on the Spreizlappen and the attachment of the two plate-shaped parts no longer safe can be.

The invention has for its object to provide a device for holding a component on a support member, with the improved holding is possible.

The object is solved by the subject matter of the independent claims. Advantageous embodiments are given in the subclaims and the following description.

The invention is based on the basic idea that the actuating part is secured to an expandable part in such a way that one of the two parts cuts into the respective other part and an at least frictional connection exists between the two parts in the region of the cut through the cut. Furthermore, a positive connection in the direction transverse to the cutting direction is possible. The operating part can be secured to the expandable part and a loss prevention can be achieved. The actuating part is secured against being displaced or dropped out relative to the expandable part. In addition to the function "hold" is also a function of "saving" of expandable part and operating part to each other.

The invention provides a device for holding a component on a carrier part, the device comprising an expandable part with one or more spreading elements and an actuating part. The expandable part and the actuating part are adapted and have one or more cams, that the spreader can be brought to a spread position in a relative movement of the operating part to the expandable part. The actuating part and / or the expandable part have one or more cutting elements, which are arranged such that they cut into the respective other part, when the actuating part and the expandable part are moved relative to each other.

The "component" and the "carrier part" may be plate-shaped parts, in particular in the automotive sector, which are held together. The two parts can have at least one plate-shaped section, which can be held one above the other by means of the device. Each of the two parts has an opening, both of which can be arranged substantially concentrically with one another in order to be able to insert or insert the device into the openings. The term "component" in the sense of the invention comprises, for example, a panel or a plate for holding on a vehicle body, in particular on a body panel. In the context of the invention, a component may in particular be a holder on a ladder frame in the truck area.

The term "holding" within the meaning of the invention includes the suitability of the device to connect the "component" with the "support member" and in particular the suitability of the device to hold the component to the support member on which the component is to be held. The term "hold" includes preventing a movement of the component with respect to the support member, in particular a movement of a longitudinal axis of the device in both directions. The suitability for "holding" the component results in the device according to the invention by expanding the expandable part.

The term "expandable part" includes a part having a head portion and the one or more spreading members. The head portion may have an inner contour and / or an outer contour with a geometry for actuation by means of engaging with a tool. The head portion may have a hexagon, a slot, a cross-shaped slot, or other shape adapted to an assembly tool or screwdriver. The spreading elements are preferably arranged in the region of a foot portion of the expandable part. The foot section can be inserted through the openings of the component and the support part. The one or more expansion elements may be brought into a spread position to hold the component and the support member together, wherein the head portion may comprise an abutment for the expansion element. The one or more spreading elements can be brought by means of a plastic deformation in the spread position. But it can also be provided that an elastic deformation can bring the one or more spreading elements in the spread position. Plastic and elastic forming can be present with different or equal weight to each other. The expandable part may be substantially cylindrical. The expandable part may comprise a metal and / or a plastic. In particular, the expandable part may be made of a thermoplastic, preferably a polyoxymethylene (POM) or polyamide (PA), preferably a non-fibrous polyamide, in particular injection-molded or injection-molded. The expandable part may also be made of a polyamide (PA), preferably a non-fibrous polyamide, or polyoxymethylene (POM), in particular injection-molded or injection-molded.

The term "actuating member" includes a part that is cooperable with the expandable member such that relative movement of the actuating member to the expandable member can bring the one or more expansion members into the expanded position. The relative movement to each other can be achieved by a movement of operating part for resting at rest expandable part. However, alternatively or additionally, the expandable part can be moved to the actuating part. Preferably, the spreading is achieved by rotating the actuating member relative to the expandable member by about 10 ° to about 180 °, more preferably about 45 ° to about 135 °, most preferably about 70 ° to about 110 °, especially about 90 °. The actuating part may be substantially cylindrical. The actuating part may comprise a metal and / or a plastic. In particular, the actuating part may be made of a thermoplastic, preferably a polyoxymethylene (POM), in particular injection molded or injection molded. The actuating part can also be made of a polyamide, preferably a non-fibrous polyamide, in particular injection-molded or injection-molded.

In a particular embodiment, expandable part and actuating part can be injection-molded in a mold, so that the two parts can be manufactured in one operation.

The term "cam" in the sense of the invention comprises a projection or an inclined surface, which comes into engagement or engagement with its relative movement with a counter-element or a contact surface, wherein the cam during the movement of a force on the Eingrifffläche and / or causes the contact surface, which leads to a deflection of the expansion element in the spread position.

The term "cutting element" includes an element having a sharp edge. A cutting element has a sharp edge with which a cut can be made in one section or area of the other part. The cutting element is designed as a blade.

In particular, the cutting element can cut into a "sacrificial element" which, for the purpose of easier cutting, is present as a thin section on the part into which the cutting element cuts. The function of "saving" is possible, for example, with a thin sheet-like section, which is cut into. Firstly, by forming a thin section that can be cut into, material and weight can be reduced, and secondly, the requirements for the cutting element for cutting the section are not so high.

In a preferred embodiment, the actuating part is at least partially surrounded by the expandable part. The actuating part can be arranged at least partially in the expandable part. The expandable part may have a passage in which the actuating part is at least partially arranged. As a result, a compact device can be achieved.

In a preferred embodiment, the actuating part is supported rotatably and / or translationally displaceable in the expandable part. The relative movement of the operating part to expandable part can be carried out by means of a rotation of the two parts to each other. Actuating member and expandable member may be concentric with each other and the relative movement of the operating member to the expandable member may be a rotation about the central axis. It is also alternatively or additionally possible that the actuating part can perform a translational displacement to the expandable part. During the relative movement, which is additionally or alternatively translationally executable, the actuating part and the expandable part can be displaced in a translatory manner along a predetermined direction. In particular, the expandable part may have a bearing for the actuating part. By the rotation and / or the translational movement of the actuating part to the expandable part of the one or more cams passes to corresponding abutment or engagement surfaces of the other part and the spreading elements are brought into the spread position.

In a preferred embodiment, one or more cutting elements on a metal and / or plastic. It is possible that the cutting element and the part on which the cutting element is formed, may be formed of a material and thus can be produced in one operation. It is also possible that the cutting element is integrally formed on the actuating part or the expandable part, so that the part and the cutting element integrally formed on the part can have different materials. It is also possible that the cutting element comprises a metal, so that the part on which the cutting element is to be formed comprises a plastic and the metal for the cutting element is encapsulated by the plastic for the actuating part or the expandable part; Furthermore, it is possible that the metal is clamped or otherwise attached to the plastic of the operating part or the expandable part. It is also possible that the expandable part or the actuating part comprise a metal, so that the actuating part and / or the expandable part, on which the cutting element is to be formed, can be made in one piece from the same material, which may be metal. The cutting element may be attached to the part where it is to be formed by any joining method, i. H. Welding, gluing, riveting and / or clamping, to be added. As a result, a large variety of materials for the individual cutting element and the parts is possible. It is possible, in particular, for the plastic to be used for the cutting element for the essentially one-time cut, so that the production method is simplified.

In a preferred embodiment, the one or more cutting elements have a straight, smooth, sawtooth or wavy section. As a result, a profile adapted to the requirements can be achieved during the cutting process. By means of a profiling or different design of the cutting element in the direction of the cut, various cuts may be possible. There are several different cutting sections on a cutting element possible, in particular, the cutting element may have two or more cutting sections, in particular a front portion with which the cut begins, and a directly or indirectly adjoining the lateral section.

It can also be provided that latching-lug-shaped elements can be provided on the cutting element or in the region of the cutting element, which can extend in particular transversely to the cutting direction. The lug-shaped elements can for example be designed such that a latching with the element, in which is cut, can take place. For example, the lug-shaped elements may be spaced apart such that a portion of the element being cut into can be positioned between the lug-shaped elements. The cutting into the element to be cut by means of the cutting element can then take place in such a way that a lug-shaped element is guided past the section of the element which is incised, and the operator using the device is made to feel haptically or sensually Section has been guided past the lug-shaped element, when the portion between the two latch-shaped elements is positioned. By means of the lug-shaped elements, an additional captive securing can be achieved by, for example, achieving positive locking in the direction of the cutting direction of the cutting element. The lug-shaped elements may be configured on the cutting element or in the vicinity of the cutting element.

For example, a stepping or latching between the individual teeth is possible via a sawtooth profile of the cutting element, in particular on the lateral section. It can be formed with defined on the cutting element pockets or gaps that lie between individual cutting sections of the cutting element and in which the cutting element is arranged with its gap such that lies in the gap to be cut or cut section.

In a preferred embodiment, the thickness of the cutting element increases from the tip of the cutting edge to the middle cutting element edge, so that improved cutting is possible and the cutting element with its middle cutting element edge abuts in the material to be cut with increased friction surface.

In a preferred embodiment, the expandable part has a stop for limiting the movement between the expandable part and the actuating part. As a result, the relative movement of the expandable part to the actuating part can be limited in an end position. In assembling the device, this may provide a haptic signal to a fitter that the assembly has been successfully completed. The feedback for the fitter may mean that a sufficient movement of the expandable part has taken place to the actuating part, which is sufficient that by means of the relative movement of the parts to each other, the expansion element has reached the spread position and / or the loss of security by cutting is done.

In a preferred embodiment, the cam comprises a cutting element and / or in the region of the cam and / or in the region of the counter element for the cam is designed a cutting element. In this way it can be achieved that the required number of cams and / or cutting elements for the functions "holding" and "securing" of the actuating part relative to the expandable part with the required and required number of cams and / or cutting elements can be performed. As a result, cams or counter-element for the cam and cutting element can be formed in spatial proximity to one another. It may additionally or alternatively be provided that the cam and cutting element are arranged in the longitudinal direction, so that the cam and cutting element can be arranged in particular "one above the other". The term "offset in the longitudinal direction" comprises an at least partial overlap in the longitudinal direction, and it may also be sufficient if the cam and cutting element are assigned to one and the same expansion element.

In a preferred embodiment, the cams and the cutting element are arranged in the direction transverse to the direction of movement of expandable part and actuating part, so that the most effective possible function of the two elements in the form of the cam and the cutting element is possible. Cam and cutting element can also be arranged one behind the other in the direction of movement of expandable part and / or operating part. Deviations from the direction are possible, so that the cutting element with its cutting edge need not necessarily be arranged perpendicular to the direction of movement of expandable part and operating part. Also, the alignment of the cam is not necessarily necessary in a direction perpendicular to the moving direction of the expandable part to the operating part. Deviations of up to approximately 45 ° are possible.

In a preferred embodiment, a sacrificial member may be formed on the part into which the cutting element intersects, to achieve a separation between the holding and securing of operating part to the expandable part and not cut into the elements required for holding.

In a preferred embodiment, the cam and cutting element alternate in the circumferential direction, so that there is a clear separation of the two functions of holding and securing the two elements to each other.

In a preferred embodiment, the actuating part has one or more stops which define a stop surface with respect to a stop on the expandable part, the stop being formed integrally with a cam. In this way, a particularly simple embodiment of the mold for the actuating part can be achieved, which can lead to a particularly simple demolding of the particular injection-molded tool.

The invention also provides a method for producing a device for holding a component on a carrier part, the device comprising an expandable part with one or more spreading elements and an actuating part. In the method, a cutting element is formed on the expandable part and / or the actuating part. The cutting element is arranged such that upon relative movement of the expandable part to the actuating part, the cutting element cuts into one of the parts.

The invention also provides a use of a cutting element on a device for holding a component on a carrier part. In this case, the device comprises an expandable part with one or more expansion elements and an actuating part, wherein the expandable part and the actuating part are adapted and have one or more cams, that brings the expansion element in a relative movement of the actuating part to the expandable part in a spread position can be. The cutting element is used for cutting into the actuating part and / or the expandable part. In this way, a securing of the two parts of the device to each other can be achieved, which has both a frictional component and a positive component.

The term "symmetry" or "symmetric" and the more specific term "point - symmetric" in The sense of the invention may include symmetry with respect to one or more axes, or symmetry with respect to a point or with respect to a plane, with slight deviations from pure geometric symmetry that does not cause significant impairment of the functions.

If, within the meaning of the invention, a number is given the term "approximately", in addition to the specific number indicated, an up to 10 percent deviation or, in particular, an angle range of +/- 10 [deg.] Can be encompassed by the specific numerical value specified.

If the term "on" and corresponding grammatical adaptations to the genus of the descriptive element subsequent to the term are used in the description and the claims, this term comprises the singular and the plural of the signifying element. The term "on" and corresponding grammatical adaptations to the descriptive element following the term usually does not exclude the provision of several elements. A numeric word used (two, three, four, etc.) includes the possibility that more than one element designated by the number word used may be present.

The term "comprising" in the sense of the invention comprises both a conclusive and a non-exhaustive list of elements which are used in the context of the term "comprising". In addition to the customary meaning in the language that further and other elements may be provided, the term "comprising" also includes according to the invention the term "consist of".

The invention will be explained in more detail below with reference to drawings showing embodiments of the invention.

Show:

1 a device according to the invention in isometric view;

2 the device according to 1 in a side view;

3 the device according to 1 in a view from above;

4 the device according to 1 in a view from below;

5 the actuating part of the device according to 1 in an isometric view;

6 an enlarged view of the device according to 1 in an isometric view from below;

7 an enlarged view of the foot portion of the operating part according to 5 ;

8th a confirmation part of the device in an enlarged view of the foot portion with a cutting element according to another embodiment;

9 a confirmation part of the device in an enlarged view of the foot portion with a cutting element according to another embodiment.

1 to 4 show a device for holding a component on a support part. The device has an expandable part 1 and an operating part 2 on. The actuating part 2 is from the expandable part 1 surrounded and is in the expandable part 1 rotatable. The expandable part has spreading elements 3 on, by means of the operating part 2 can be brought into a spread position.

The expandable part 1 has a head section 4 on, which has a contact surface 5 includes, which can get into contact with a component. The spreading elements 3 can be inserted through an opening of a component and a support member, wherein the contact surface 5 rests on the component and the edge surrounds the opening. The spreading elements 3 extend from the head section 4 of the expandable part 1 in the longitudinal axial direction.

At the spreading elements 3 are for profiling on the outside of the same Spreizelementrippen 15 educated. The spreading elements 3 have a chamfer on the foot side 16 on, which facilitates insertion into the opening of the component and the support member.

For positioning the device, the head portion 4 of the expandable part 1 have an outer contour that can be gripped by a tool or a mounting aid. The outer contour of the head section 4 of the expandable part 1 is designed as a hexagon.

The actuating part 2 according to 5 a cylindrical or tubular section 6 which is hollow and includes an inner contour that can be engaged with a tool or a mounting aid. The inner contour of the actuating part 2 is in the head section 7 of the operating part 2 educated. At the foot section 8th of the operating part 2 are two cams 9 formed during a rotation of the actuating part 2 compared to the expandable part 1 in contact with the spreading elements 3 arrive and the spreading elements 3 bring foot side in a spread position. The rotation is clockwise.

Furthermore, the actuating part 2 cutting elements 10 at the foot-side section 8th on.

In 6 can be seen, like cams 9 and spreading element 3 as well as cutting element 10 and one on the spreader 3 trained sacrificial element 11 , which is web-shaped, can interact. On the spreader 3 is for spreading a solid material rib 12 trained with the cam 9 upon rotation of the operating part 2 relative to the expandable part 1 interacts. During the rotation of the operating part 2 opposite the expandable part 1 urges the cam 9 the solid material rib 12 and the spreading element formed thereon 3 in a spread position. Further, the cutting element cuts 10 in the on the spreader 3 molded sacrificial element 11 one. The cutting element 10 is a plastic that has the same material as the other part of the operating part 2 ,

cutting element 10 and cams 9 are point symmetrical on the actuating part 2 educated. cutting element 10 and cams 9 alternate in the circumferential direction. There are two cutting elements 10 and two cams 9 educated. cutting element 10 and cams 9 are essentially at the same height in the foot section 8th of the operating part 2 arranged.

As stops are in the head section 4 of the expandable part 1 attacks 13 trained with attacks 14 of the operating part 2 interact. There are four attacks 13 in the head area 4 of the expandable part 1 formed, which are arranged in the circumferential direction equiangularly to each other. On the actuating part 2 are two stops 14 formed, which are arranged at 180 ° to each other. The attacks 14 extend over the entire length of the operating part 2 and are particularly integral with the cams 9 connected.

The 3 shows the device in a starting position, in which the spreading elements 3 are in an unspread position. There may be a 45 ° rotation between operating part 2 and expandable part 1 which is limited by the fact that the attack 14 of the operating part 2 to the stop 13 of the expandable part 1 got into contact. The attacks 13 where the attacks 14 abut in the initial position, make sure that the operating part can not be rotated counter to the intended direction of actuation in a clockwise direction.

7 shows an enlarged view of a foot section 8th of the operating part 2 , Alternating around the circumference of the operating part 2 are cutting elements 10 and cams 9 arranged. That in the 7 illustrated cutting element 10 is smooth. The cutting element 10 has a front portion and a side portion. With the front section is first in the sacrificial element 11 cut.

The 8th shows in contrast to 7 a cutting element 10 with a sawtooth-like profile. The sawtooth-like profile is on both the front portion of the cutting element 10 as well as on the side section of the cutting element 10 educated. Also in the 8th illustrated embodiment alternate cutting element 10 and cams 9 around the circumference of the operating part 2 from. The sacrificial element 11 can lock between the sawtooth-like protrusions that follow one another.

The 9 shows a further embodiment of a cutting element 10 in which the front section of the cutting element 10 smooth and the side portion has a sawtooth-like profile. The in the 9 illustrated "saw teeth" of the lateral portion have a flat front edge and a steeper trailing edge. Due to the steeper trailing edge, the haptic feedback for a user of the operating part 2 operated, improved. The shallower increase in incision imparts even or greater feedback, and when the trailing edge is reached, the user is haptically acknowledged to the user that he is in a latched position because the back pressure of the sacrificial member is decreasing.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2935369 A1 [0003, 0004]

Claims (14)

Device for holding a component on a carrier part, the device comprising: - an expandable part ( 1 ) with one or more spreading elements ( 3 ) and - an actuating part ( 2 ), wherein the expandable part ( 1 ) and the actuating part ( 2 ) are adapted and one or more cams ( 9 ), that the expansion element ( 3 ) at a relative movement of the actuating part ( 2 ) to the expandable part ( 1 ) can be brought into a spread position, characterized in that the expandable part ( 1 ) and / or the actuating part ( 2 ) one or more cutting elements ( 10 ) which are arranged such that they cut into the respective other part when the actuating part ( 2 ) and the expandable part ( 1 ) are moved relative to each other. Device according to claim 1, characterized in that the actuating part ( 2 ) at least partially from the expandable part ( 1 ) is surrounded. Apparatus according to claim 1 or 2, characterized in that the actuating part ( 2 ) rotatably and / or translationally displaceable in the expandable part ( 1 ) is supported. Device according to one of claims 1 to 3, characterized in that one or more cutting elements ( 10 ) comprise a metal and / or a plastic and the actuating part ( 2 ) and / or the expandable part ( 1 ) comprise a plastic and / or a metal. Device according to one of claims 1 to 4, characterized in that the one or more cutting elements ( 10 ) have two or more sections, one of which is straight, sawtooth or wavy. Device according to one of claims 1 to 5, characterized in that the thickness of the cutting element ( 10 ) is increased from the tip of the cutting edge toward the middle cutting edge. Device according to one of claims 1 to 6, characterized in that the expandable part ( 1 ) a stop ( 13 ) for limiting the movement between the expandable part ( 1 ) and actuating part ( 2 ) having. Device according to one of claims 1 to 7, characterized in that in the region of the cam ( 9 ) a cutting element ( 10 ) is arranged and / or the cam ( 9 ) as a cutting element ( 10 ) is configured and / or the cam ( 9 ) in the longitudinal direction of the actuating part ( 2 ) and / or the expandable part ( 1 ) is offset from one another. Device according to one of claims 1 to 8, characterized in that cams ( 9 ) and cutting element ( 10 ) in the direction of the direction of movement of expandable part ( 1 ) and actuating part ( 2 ) are arranged. Device according to one of claims 1 to 9, characterized in that the one or more cutting elements ( 10 ) into a sacrificial element ( 11 ) cuts. Device according to one of claims 1 to 10, characterized in that the cam ( 9 ) and the cutting element ( 10 ) alternate in the circumferential direction. Device according to one of claims 1 to 11, characterized in that the actuating part ( 2 ) one or more stops ( 14 ) having a stop surface in relation to a stop ( 13 ) on the expandable part ( 1 ), whereby the stop ( 14 ) in one piece with a cam ( 9 ) is configured. Method for producing a device for holding a component on a carrier part, the device comprising an expandable part ( 1 ) with one or more spreading elements ( 3 ) and an actuating part ( 2 ), characterized by forming a cutting element ( 10 ) on the expandable part ( 1 ) and / or the actuating part ( 2 ). Use of a cutting element ( 10 ) on a device for holding a component on a carrier part, wherein the device has an expandable part ( 1 ) with one or more spreading elements ( 3 ) and an actuating part ( 2 ), wherein the expandable part ( 1 ) and the actuating part ( 2 ) are adapted and one or more cams ( 9 ), that the expansion element ( 3 ) at a relative movement of the actuating part ( 2 ) to the expandable part ( 1 ) can be brought into a spread position, characterized in that the cutting element ( 10 ) for cutting into the actuating part ( 2 ) and / or in the expandable part ( 1 ) is used.

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