METHOD FOR PRODUCING A NUT WHICH IS ROTATIONALLY CONNECTED TO A CABLE SHOE, AND NUT WHICH IS ROTATIONALLY CONNECTED TO A CABLE SHOE

Abstract

The invention relates to a method for producing a nut which is rotationally connected to a flat part connecting section of a cable shoe, wherein the flat part connecting section has a passage opening, the nut has a sitting face which is at the bottom in the connected state, and a holder section extends on the nut from the sitting face further downward, wherein a tapered portion of the passage opening is formed by a holder material section which is preliminarily curved into the passage opening by deformation, and the holder material section is produced by a recess which is made in the flat part connecting section so as to surround the passage opening on a top side of the flat part connection section, which top side is associated with the sitting face. In order to specify a method of this kind which can be carried out in respect of production, in particular in respect of the production costs, in a favourable manner, it is proposed that the holder material section is first formed and the nut is placed onto the top side, wherein the holder section protrudes downward beyond a narrowest cross section of the passage opening which is formed by the holder material section, and that the holder section is then widened below the narrowest cross section, for the purpose of holding the nut on the cable shoe in a rotatable and interlocking manner. The invention further relates to a nut which is fitted in a rotatable manner on a flat part connecting section of a cable shoe.

Claims

1. A method for producing a nut that is connected to a flat part connecting section of a cable shoe in a freely rotatable manner, wherein the flat part connecting section has a passage opening, the nut has a seating face, which is at the bottom in the connected state, and a holder section extends further downward from the seating face on the nut, wherein a tapered portion of the passage opening is formed by a holder material section, which is pre-curved into the passage opening by deformation, and wherein the holder material section is formed by a recess, which is produced in the flat part connecting section so as to surround the passage opening on a top side of the flat part connecting section that is associated with the seating face, characterized in that the holder material section is initially formed and the nut is attached to the top side, wherein the holder section protrudes downward beyond a narrowest cross section of the passage opening, which is formed by the holder material section, and that the holder section is subsequently widened underneath the narrowest cross section in order to hold the nut on the cable shoe in a rotatable and interlocking manner.

2. The method according to claim 1, further comprising surface treating the cable shoe before attaching the nut (4) is attached to the top side.

3. A nut attached to a flat part connecting section of a cable shoe in a freely rotatable manner, wherein the flat part connecting section has a passage opening, the nut comprising: a seating face, which is at the bottom in the connected state, and a holder section extends further downward from the seating face, wherein a recess (11) is produced in the flat part connecting section so as to surround the passage opening on a top side that is associated with the seating face of the nut, wherein a tapered portion of the passage opening (8) is formed by a holder material section, which is pre-curved into the passage opening, and wherein the holder section protrudes downward beyond a narrowest cross section of the passage opening that is formed by the holder material section, wherein the holder section is widened underneath the narrowest cross section by plastic deformation in order to hold the nut on the cable shoe in a freely rotatable and interlocking manner.

4. The nut according to claim 3, wherein a partial region of the top side on both sides protrudes beyond the recess on the same side of the passage opening in a cross section through the flat part connecting section, in which a geometric center axis of the passage opening forms a line.

5. The nut according to one of claim 3, wherein the recess is circumferential groove.

6. The nut according to one of claim 4, wherein the recess is a circumferential groove.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention is described in greater detail below with reference to the attached drawings that, however, merely show exemplary embodiments. In these drawings:

[0025] FIG. 1 shows a first embodiment of a nut that is connected to a cable shoe;

[0026] FIG. 2 shows the enlarged detail II-II of FIG. 1;

[0027] FIG. 3 shows another embodiment, in which the cable shoe is made of solid material, in the form of an illustration according to FIG. 1;

[0028] FIG. 4 shows another embodiment according to FIG. 1 or FIG. 3 with a nut, which has a recessing formation on the seating face;

[0029] FIG. 5 shows the enlarged detail V-V of FIG. 4; and

[0030] FIG. 6 shows an exemplary illustration of the production of the cable shoe according to FIG. 1, which is connected to a nut.

DESCRIPTION OF THE EMBODIMENTS

[0031] A cable shoe 1 with a flat part connecting section 2 is initially described with reference to FIGS. 1 and 2. A nut 4 is seated on the top side 3 of the flat part connecting section 2. The nut 4 conventionally contains a screw opening 24 with an internal thread 5. The nut 4 is seated on the top side 3 by means of the seating face 6. A holder section 7 extends further downward from the seating face 6 and may be realized cylindrically in the initial state as illustrated, e.g., in FIG. 6f. The holder section 6 preferably is realized integrally with the nut 4 and made of the same material.

[0032] The flat part connecting section 2 furthermore contains a passage opening 8 that has a geometric center axis 9.

[0033] FIG. 2 particularly shows that a holder material section 10 protruding into the passage opening 8 is formed on the flat part connecting section 2 and encompassed by the holder section 7, which is widened by plastic deformation on its free end.

[0034] A recess 11 is furthermore produced in the flat part connecting section 2 starting from the top side 3. This recess 11 has led to the formation of the holder material section 10.

[0035] According to the embodiment in FIGS. 1 and 2, as well as all other embodiments described herein, the nut is therefore held on the cable shoe 1 in a form-fitting but freely rotatable manner. A certain axial play, which advantageously allows the free rotatability, preferably remains between the holder material section 10 and the holder section 7, which cross-sectionally encompasses this holder material section.

[0036] The embodiment in FIG. 3 corresponds to the embodiment in FIGS. 1 and 2. Identical components and regions accordingly are identified by the same reference symbols.

[0037] The only difference can be seen in that the flat part connecting section 2 is made of solid material. Accordingly, there are no folded sections that form two layers 12, 13 in a cross section.

[0038] In the embodiment in FIGS. 4 and 5, the nut 4 is directly realized with a recessing projection 14 on the seating face 6 thereof.

[0039] This recessing projection 14 particularly may consist of a vertical face 15, which preferably includes an acute angle with the vertical line. A peripheral face 16 may furthermore be formed so as to likewise include an acute angle with a vertical line V. The design can also be described in such a way that both faces include an acute angle with a horizontal line, which is not illustrated in greater detail.

[0040] The acute angles and preferably lie in the range of 1-60. It is furthermore preferred that the angle lies between 10 and 30 and the angle lies between 20 and 50. In the exemplary embodiment, the angle amounts to 15 and the angle amounts to 30.

[0041] On its radially outer side, the vertical face 15 transforms into a horizontal face 17 that, if applicable, may have a different radial extent over the circumference in a hexagonal design of the nut.

[0042] In this embodiment, the described faces 15-17 jointly form the seating face of the nut 4. In a concentric alignment between the nut 4 and the passage opening 8, the seating face extends radially inward until it overlaps with the edge of the passage opening 8, particularly referred to the edge that remains unaffected by a deformation process.

[0043] As a result of the described angular design of the peripheral face 16 and the vertical face 15, a resilience of the material of the flat part connecting section 2 can occur when the nut 4 is correspondingly pressed into the top side of the flat part connecting section 2, wherein said resilience in any case causes the horizontal face 17 to be slightly raised above the top side 3 of the flat part connecting section 2. The desired easy rotatability can also be advantageously affected in this way.

[0044] In contrast to the embodiment in FIGS. 1-3, the holder material section 10 in the embodiment in FIGS. 4 and 5 is normally shifted further downward into the passage opening 8 in the flat part connecting section 2.

[0045] An example of the production of a nut, which is rotationally connected to a flat part connecting section of a cable shoe, is described in greater detail below with reference to FIG. 6.

[0046] A tube section 18 may be used as base product for the cable shoe 1. The tube section 18 is pressed into a flat shape on one side in order to form the flat part connecting section 2; see FIG. 6b.

[0047] The passage opening 8 can be produced in the next step; see FIG. 6c. This may be realized, for example, by means of a punching process. In an alternative embodiment illustrated in FIG. 6c, the recess 11 can be produced simultaneously with the production of the passage opening 8, which is preferably realized by means of a punching process. This figure also shows an example of a combined recessing and punching tool 25, which can be used for this purpose. In this case, the production of the passage opening 8 and the production of the recess 11 are carried out in an integrated manner.

[0048] If the production of the passage opening 8 and the production of the recess 11 are not carried out in an integrated manner, the recess 11, which in the exemplary embodiment illustrated in FIG. 6 consists of a circumferential groove, is produced in another optional production step; see FIG. 6d. This figure furthermore shows a die tool 23, which can be optionally used for producing the recess 11.

[0049] In another production step that is indicated in FIG. 6e, the thusly prepared cable shoe can be subjected to a surface treatment, e.g. for applying a surface coating, particularly an anti-corrosion coating 19.

[0050] The nut 4 is attached to the top side 3 of the thusly produced cable shoe in the next production step; see FIG. 6f. In this case, the holder section 7 is still undeformed and protrudes downward into the passage opening 8 beyond a narrowest cross section x of the holder material section 10.

[0051] The holder section 7 is widened by means of a mandrel 20 in the next production step; see FIG. 6g. In order to limit the advance of the mandrel 20, a flatly designed top side 21 thereof can come in contact with the associated bottom side 22 of the flat part connecting section 2.

LIST OF REFERENCE SYMBOLS

[0052] 1 Cable shoe [0053] 2 Flat part connecting section [0054] 3 Top side [0055] 4 Nut [0056] 5 Internal thread [0057] 6 Seating face [0058] 7 Holder section [0059] 8 Passage opening [0060] 9 Center axis [0061] 10 Holder material section [0062] 11 Recess [0063] 12 Layer [0064] 13 Layer [0065] 14 Recessing projection [0066] 15 Vertical face [0067] 16 Peripheral face [0068] 17 Horizontal face [0069] 18 Tube section [0070] 19 Anti-corrosion coating [0071] 20 Mandrel [0072] 21 Top side [0073] 22 Bottom side [0074] 23 Die tool [0075] 24 Screw opening [0076] 25 Combined recessing and punching tool [0077] Angle [0078] Angle [0079] V Vertical line [0080] x Cross section