Hub assembly for a wire basket spool

Abstract

A hub device (10) for a wire basket spool, in particular a welding wire basket spool, is described, comprising a machine-side hub body (12), a hub sleeve body (14) rotatably mounted on the hub body (12) for the wire basket spool, and a braking device (16) provided for braking the hub sleeve body (14), which has a screw element (24) screwed into the hub body (12) between a first and a second contact body (18, 20), wherein the screw element (24) and the first contact body (18) form a single-piece assembly and the hub body (12) is designed with an internal threaded hole (36) into which the screw element (24) of the braking device (16) is screwed.

Description

[0001] The invention relates to a hub device for a wire basket spool, in particular a welding wire basket spool, comprising a machine-side hub body, a hub sleeve body rotatably mounted on the hub body for the wire basket spool, and a braking device provided for braking the hub sleeve body, which has a screw element screwed into the hub body between a first and a second contact body.

[0002] Such a hub assembly is known from DE 10 2020 004 824 B4. The hub sleeve body of this hub assembly is designed with an external threaded section for an annular nut element. The braking device has a helical compression spring between a machine-side first contact body and a front-side second contact body. The second contact body has a first information embossing on its end face, and the annular nut element has a second information embossing on its end face. A screw nut is fastened in the hub body, into which the screw element is screwed. The braking device of this known hub assembly thus consists of the screw element, the first and second contact bodies, the helical compression spring, and the screw nut. This number of individual parts requires a corresponding amount of storage space, and their assembly is time-consuming.

[0003] From DE 10 2020 007 103 B3, a hub device for a wire basket spool, in particular welding wire, is known, comprising a hub body on the welding machine side and a hub sleeve body for the wire basket spool rotatably mounted thereon. A braking device is provided between the hub sleeve body and the hub body, which has spring-loaded brake finger elements in order to maintain the braking characteristics virtually unchanged after a long operating time of the hub device.

[0004] DE 10 2006 035 762 B3 discloses a device for attaching a welding wire basket spool to a hub assembly of a welding machine. The hub body of this hub assembly is designed with an external threaded section for a spring-loaded ring nut element. The ring nut element has a central through-hole, which deviates from a circular shape, with a long and a short axial diameter oriented perpendicular to it, and is designed with a locking rib that engages in the external threaded section. When the ring nut element is compressed in the direction of the long axial diameter, the locking rib is not engaged with the external thread of the hub body. When the ring nut element is unloaded, the locking rib is engaged with the external thread of the hub body.This ensures that the ring nut element can be positioned at the desired position on the external thread section of the hub sleeve body in a time-saving manner, without having to screw it on along the external thread section in a time-consuming process.

[0005] From DE 10 2012 021 231 B3, a coil mandrel, i.e., a hub sleeve body with a ring nut element for a basket spool for wire, in particular welding wire, is known. The coil mandrel has an external threaded section with thread ribs and thread grooves. The ring nut element is designed with an internal thread rib. The coil mandrel has an axially extending, radially resilient tongue section, which is formed with a ramp element that is oriented circumferentially to at least one thread groove of the external threaded section. The ramp element has a shallowly inclined screw-on ramp surface and a steeply inclined unscrewing ramp surface.The internal thread rib of the ring nut element has two opposing end faces in the circumferential direction. The first end face, intended for tightening the ring nut element, has a shallowly inclined counter-ramp surface, while the second end face, intended for loosening the ring nut element, has a steeply inclined counter-ramp surface. This known coil mandrel thus has only a single ramp element, which is associated with at least one thread groove of the external thread section. The ramp element can have an axial dimension that extends, for example, over two or more thread grooves of the external thread section of the coil mandrel.

[0006] DE 101 27 774 C2 discloses a wire basket spool, in particular for welding wire, with a hub assembly of the type mentioned above for a wire basket spool. The hub assembly comprises a machine-side hub body and a hub sleeve body rotatably mounted thereon. A braking device is provided for braking the hub sleeve body, which has a screw element screwed into the hub body between a first and a second contact body. For this purpose, a nut is fastened in the hub body. With the aid of the screw element, the helical compression spring can be mechanically tensioned, and thus the pressure or frictional force between the hub sleeve body and the machine-side hub body can be adjusted as desired. This wire basket spool also therefore consists of a relatively large number of individual parts.

[0007] The invention is based on the objective of creating a hub assembly of the type mentioned above in which the braking device consists of fewer individual parts than in known hub assemblies.

[0008] This problem is solved according to the invention by the features of claim 1, i.e. in that the screw element and the first mounting body form a single-piece assembly and the hub body is designed with an internal threaded hole into which the screw element of the brake device is screwed.

[0009] Because the screw element and the first mounting body form a single, integral unit, the advantage arises that the manufacturing and storage of this unit is avoided compared to the manufacturing and storage of a screw element and a separate, independent first mounting body. Furthermore, because the hub body is directly formed with an internal threaded hole into which the screw element of the brake device is screwed, the need for a separate nut attached to the machine-side hub body, and thus the need for its storage, is advantageously eliminated.

[0010] In the hub device according to the invention, it has proven advantageous if the screw element has a threaded shaft and a screw head forming the first contact body, which form a single-piece assembly, wherein the threaded shaft has an external thread section and the screw head is conically widened away from the threaded shaft.

[0011] The screw head of the screw element according to the invention is designed to widen conically away from the threaded shaft in such a way that it reliably positions the end of the screw compression spring furthest from the machine without play.

[0012] A weight reduction of the screw element according to the invention, without affecting its positioning or its mechanical strength, can be achieved by designing the screw head with axially oriented ribs spaced apart from one another.

[0013] Weight reduction and material savings can also be achieved by designing the threaded shaft with a central blind hole and with transverse holes that extend into the blind hole.

[0014] For reliable actuation of the brake device in a manner known per se, it is advantageous if the screw head of the screw element is designed with a central polygonal blind screw hole for a screw tool.

[0015] To reliably prevent incorrect operation of the brake device, it has proven advantageous if the screw head is designed with an actuation mark on its outer end face.

[0016] In a hub device according to the invention of the type mentioned above, comprising a hub sleeve body which has an external threaded section on its outer surface for a resiliently pressable ring nut element, as is known from the cited DE 10 2006 035 762 B3, allowing the ring nut element to be positioned at least approximately at the correct position of the external threaded section on the external threaded section of the hub sleeve body without time-consuming screw operation, in a preferred embodiment of the hub device according to the invention, the hub sleeve body has at least one axially oriented, resilient tongue section on its outer surface, which is designed with at least two axially spaced ramp elements, each of which has a shallowly inclined screw-on ramp surface and a steeply inclined unscrew-off ramp surface.The at least one resilient tongue section can also be designed with more than two axially spaced ramp elements. It is preferred if the hub sleeve body is designed with a pair of diametrically opposed resilient tongue sections.

[0017] Further details, features and advantages will become apparent from the following description in conjunction with the accompanying drawings.

[0018] They show: Fig. 1. Half-cut, an embodiment of the hub device, Fig. 2 another view of the hub assembly according to Fig. 1, Fig. 3 the hub assembly according to the Fig. 1 and Fig. 2 in a view from a slightly elevated angle, Fig. 4 a perspective view of the screw element of the hub assembly viewed from an oblique angle above, Fig. 5 the screw element according to Fig. 4 in the direction of view from a diagonally below, and Fig. 6 a perspective view of the hub sleeve body of the hub assembly.

[0019] Fig. Figure 1 shows a perspective view of the hub assembly 10 for a wire basket spool, in particular for a welding wire basket spool. The hub assembly 10 comprises a machine-side hub body 12 and a hub sleeve body 14 rotatably mounted on the hub body 12. To brake the hub sleeve body 14 relative to the hub body 12, the hub assembly 10 includes a braking device 16, which has a helical compression spring 22 between a first contact body 18 and a second contact body 20. The braking device 16 also includes a screw element 24 screwed into the hub body 12. The screw element 24 has a threaded shank 26. The hub body 12 has an internal blind hole 28 with a circumferential edge that deviates from a circular shape and is preferably regularly polygonal.The second mounting body 20 of the brake device 16 is designed with a polygonal collar 30, with which it is arranged in a blind hole 28 in a rotationally fixed manner, which is formed in the hub body 2.

[0020] The threaded shank 26 of the screw element 24 is screwed into the internal thread 32 of a through hole 34 formed in the hub body 12. The through hole 34 with the internal thread 32 forms an internally threaded hole 36 in the hub body 12.

[0021] As also from the Fig. 4 and Fig. As can be seen in Figure 5, the screw element 24 and the first contact body 18 form a single, integral unit. These figures also illustrate that the first contact body 24 directly and immediately forms a screw head 38, which, together with the threaded shank 26 of the screw element 24, forms a single, integral unit. The screw head 38 is conically widened away from the integral threaded shank 26. The screw head 38 is formed with spaced-apart, axially oriented, conically widening ribs 40.

[0022] As from the Fig. 1, Fig. 4 and Fig. As can also be seen in Figure 5, the threaded shaft 26 of the screw element 24 is designed with a central blind hole 42 and with transverse holes 44 extending into the blind hole 42 to reduce weight.

[0023] The screw head 38 of the screw element 24 is also designed with a central polygonal, preferably regularly hexagonal, blind screw hole 46 for a screwing tool. In order to reliably prevent unintentional incorrect actuation of the screw element 24 of the brake device 16, the screw head 38 is provided with a self-explanatory actuation marking 50 on its outer end face 48.

[0024] The hub sleeve body 14 of the hub assembly 10 is formed on its outer surface 50 with an external threaded section 52 for a resiliently compressible ring nut element 54. The ring nut element 54 is formed on its inner side with an annular rib 56. Such a ring nut element 54 is described in detail in the previously cited DE 10 2006 035 762 B3. While in the aforementioned publication the hub sleeve body has a resilient tongue section with a single ramp element, according to the invention two diametrically opposed resilient tongue sections 58 for the resiliently compressible ring nut element 54 with four axially spaced ramp elements 60 are formed, as shown in Fig. 6 is evident. Each ramp element 60 is designed with a shallowly inclined screw-on ramp surface 62 and with a steeply inclined unscrew-off ramp surface 64.

[0025] The design of the hub sleeve body 14 with more than one ramp element 60 on the respective spring-loaded tongue section 58 offers the advantage that the spring-loaded ring nut element 54 can be positioned at the appropriate height on the external thread section 52 of the hub sleeve body 14, depending on the axial dimension of a (not shown) basket spool to be mounted on the hub sleeve 12 of the hub assembly 10. This eliminates the need to screw the ring nut element 54 onto the hub sleeve body 14 from the outer edge or its external thread section 52 to achieve the correct position. This advantageously saves time during assembly. Reference number list: 10 Hub assembly 12 hub bodies (out of 10) 14 hub shell bodies (from 10 to 12) 16 Braking device (from 10 for 14 against 12) 18 first investment unit (for 22) 20 second plant body (for 22) 22 helical compression springs (of 16 between 18 and 20) 24 screw element (out of 16) 26 threaded shaft (out of 24) 27 External thread section (of 26) 28 blind holes (in 12 for 20) 30 collars (out of 20) 32 internal threads (in 34) 34 through holes (in 12) 36 Internal threaded hole (32, 34) 38 screw head (of 24; 18) 40 ribs (out of 38) 42 central blind hole (in 26) 44 transverse holes (in 26) 46 screw blind hole (in 38) 48 Outer frontal area (out of 38) 49 Actuation mark (at 48) 50 Outer surface area (out of 14) 52 External thread section (at 50) 54 Ring nut element (of 10) 56 Screw nut ring rib (of 54) 58 resilient tongue section (out of 14) 60 ramp elements (at 58 for 56) 62 shallow inclined screw-on ramp surfaces (out of 60) 64 steeply inclined unscrewing ramp surface of (60) QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2020 004 824 B4

[0002] DE 10 2020 007 103 B3

[0003] DE 10 2006 035 762 B3 [0004, 0016, 0024] DE 10 2012 021 231 B3

[0005] DE 101 27 774 C2

[0006]

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