DE2728423A1 - SPRING LUG - Google Patents

Description

Grote & Hartmann GmbH & Co. KG., Am Kraftwerk 13 5600 Wuppertal 21

Spring cable lug

The invention relates to a spring cable lug with a U-shaped Claw part with conductor and insulation claw as well as a spring part, consisting of an extension of the Claw part U-shaped spring arm base and spring arms extending forward to the U-legs of the spring arm base, each in the end area inward to the contact area are bent back towards each other and are followed by guide tabs that run backwards.

Such cable lugs are standardized according to DIN 46238. They are suitable for repeated actuation if low plug-in and require pulling forces and ensure relatively high contact force.

Spring cable lugs have a resilient contact part on the device side, which is also used in the case of larger fluctuations in thickness the tabs should ensure good contact.

- 2 809881/0369

Grote & Hartmann GmbH & Co KG, Wuppertal

2728A23

A conductor and an insulation claw are arranged on the cable connection side.

A basic distinction is made between a form A, which has a contact part with an over-spring, and a form B, whose contact part is formed in one piece.

The spring cable lugs are usually housed in a housing for which installation dimensions are also prescribed are.

The well-known spring cable lugs of form A and B have an insulation and conductor claw as well as one to the Conductor claw connecting contact part. The contact part usually has a contact spring with two opposite one another On spring arms which are bent towards one another at least in the front end region that they have a Form contact point, which at the same time represents a surface guide for the contact pin. There are also lateral guide elements provided for the contact pin, either of the spring arms in their central area at right angles inward bent lobes or, in the case of form B, the spring base and an inwardly bent lobe. The overspring of form A is usually an external spring, which is known to be difficult to assemble and which only needs to be bent after the Contact part can be plugged.

- 3 809881/0369

Grote & Hartmann GmbH & Co KG, Wuppertal

-Λ-

There is also a spring cable lug known with a U-shaped claw part with a conductor and insulation claw as well a spring part, consisting of a U-shaped spring arm base as an extension of the claw part and attached to the U-legs the spring arm base forwardly extending spring arms, each in the end area inward to the contact area are bent back towards each other and are followed by guide tabs that run backwards.

The usual spring cable lugs are in particular in the contact part complex and require a lot of material and many process steps for completion. In particular, however, the spring travel is insufficient. These disadvantages are compounded by the fact that the embodiments With and without overspring differentiate structurally and a cable lug with overspring without overspring is not usable.

The object of the invention is to increase the spring deflection of the cable lugs optimize and create a spring cable lug that requires relatively few process steps for its manufacture as well as with and without overspring.

This object is achieved according to the invention in a spring cable lug of the type mentioned in that

- 3a 809881/0369

Grote & Hartmann GmbH & Co. KG, Wuppertal

the spring arm base is a U-shaped extending outward has a stamped stability bead and the spring arms are bent to the outside in connection with the legs exhibit.

- 4 809881/0369

Grote & Hartmann GmbH & Co. KG, Wuppertal

Further essential features of the invention contain the characterizing features of claims 2 to 11.

The invention is explained in more detail by way of example with the aid of the drawing. Show it

Fig. 1: a plan view, Fig. 2: a side view,

3: a top view of an embodiment with locking lugs,

FIG. 4: a side view of the embodiment according to FIG. 3,

5: a plan view of an embodiment with an overspring.

The spring cable lug according to the invention consists of the insulating claw 1, the conductor claw 2 and the contact part The claws 1 and 2 are connected to the contact part 3 via a Cranked web 4 connected, which merges into the spring arm base 5 of the contact part 3. The cable lug is with the Parts 1 to 5 U-shaped.

The spring arm base 5 has a U-shaped, according to on the outside stamped stability bead 6. This ensures a particularly rigid and stable base and prevents Overbends when plugging.

Close to the U-legs 7 and 8 of the spring arm base 5

809881/0369

Grote & Hartmann GmbH & Co. KG, Wiropertal

"Λ"

forward spring arms 9 and 10. The spring arms 9 and 10 have in connection with the legs 7 and a bend 11 to the outside and then run conically towards each other up to the tip 12. There they are each turned back inwards and run towards each other in the shape of a trough until they touch one another at the contact point 13 or support one another. The trough-shaped course results a tulip-shaped demonstration 14.

The contact point 13 is preferably formed by pronounced beads 15 and 16, on which one another towards the rear Connect the guide tabs 17 and 18 tapering. The guide tabs form the surface guide for the contact pin. The lateral guidance is ensured in an advantageous manner that the guide tab 18 in the end area is made wider than the guide tab 17 and forms the side edge regions 19 and 20. These are cut along the edges 25 and 26 and the resulting webs 27 and 28 inwardly over the side edges 29 and 30 of the guide tab 17 are bent.

Just as wide as the guide tab 18, the spring arms 9 and 10 are designed in this area, so that the Spring arms with base and bead result in an almost square box shape. It is essential that the Abkröpfung of the web 4 corresponds to the bead depth, so that the cross webs of the U-shaped parts are aligned on the outside.

809881/0369

Grote & Hartmann GmbH & Co. KG, Wupuertal

fen and with the side edges 20 and 21 are on the same level. Due to the wider design of the side edges 20, 21 and 19, 22 result in the increment 23 in the spring arms 9 and 10.

The side edges 22 are aligned with the upper edges 24 of the U-legs 7 and 8 of the base 5 »This results the possibility of a particularly stable mounting of the spring cable lug in a housing.

The spring arms 9, 10 are preferably slit longitudinally in the middle in the end area, so that the aligned slots 12a result, and the guide tab 17 is bevelled laterally towards the end, so that the edges 29 and 30 one another run up.

According to a particular embodiment of the invention, the spring arms 9, 10 point from the bends 11 in the direction of the Claws have two locking lugs 31 and 32, which are arranged in extension of the side edge areas 22 and in front

are angled inwards or outwards in the end area (Fig. 3 and 4). In particular, these latching lugs enable the spring cable lug to be installed in one-piece housing and ensure thus a particularly simple assembly with one-piece housings. Together with the box-shaped design of the contact part, the locking lugs lead to a tilt-free seat of the spring cable lug in a housing, eodaß

809881/0369

Grote & Hartmann GmbH & Co. KG

the insertion funnel is fixed in position and facilitates insertion and the contact pin is guided on the surface and on the side.

The spring cable lug according to the invention can be used without an overspring be used. However, an over-spring can also be provided for varying layer thicknesses. This is preferable an inner spring 33, the guide tabs 17 and 18 between the spring arms 9,10 superimposed and with the Clip ends 34 and 35 on the inner surfaces of the beads 15 and 16 is supported exactly opposite the contact point 13. Such an internal overspring is easy to sort and mountable.

The spring cable lug according to the invention obviously requires little material and needs to be Only a few bending operations are completed. The effective spring arms are calculated relative to the connection long and thus result in favorable spring travel. A major advantage of the spring cable lug according to the invention is its use with and without an overspring.

809881/0369

e e r e i t e

Claims (11)

Expectations 1J spring cable lug with a U-shaped claw part with Ladder and insulation claw as well as a spring part, consisting of an extension of the claw part U-shaped spring arm base and spring arms extending forward to the U-legs of the spring arm base, which are each bent back inwardly in the end area up to the contact area and converge this is followed by guide tabs running backwards, characterized in that that the spring arm base (5) has a U-shaped, outwardly stamped stability bead (6) and the spring arms (9, 10) have an outward bend in connection with the legs (7, 8). 2. Spring cable lug according to claim 1, characterized in that that the contact point (13) is formed by pronounced beads (15 and 16). 809881/0369 , NSPECTED Grote & Hartmann GmbH & Co. KG, Wuppertal 3. Spring cable lug according to claim 1 and / or 2, characterized in that lateral guide elements are provided from inward over the side edges (29, 30) of the guide tab (17) curved webs (27, 28) of the guide lobe (16) are formed. 4 · Spring cable lug according to one or more of the claims 1 to 3, characterized in that the spring arms (9 and 10) are made as wide as the guide tabs (18) and with the base (5) and the The bead (6) results in an almost square box shape. 5. Spring cable lug according to one or more of the claims 1 to 4 »characterized in that the web (4) is bent upwards, the bend corresponding to the bead depth. 6. Spring cable lug according to one or more of the claims 1 to 5, characterized by a step change (23) in the spring arms (9 and 10). 7. Spring cable lug according to one or more of the claims 1 to 6, characterized in that the side edges (22) run in alignment with the upper edges (24) of the U-legs (7 and 8) of the base (5). 80888Ί? (Πβ9 Grote & Hartmann GmbH & Co. KG, Wuppertal 8. Spring cable lug according to one or more of the claims 1 to 7, characterized in that the spring arms (9 and 10) are slotted longitudinally in the middle in the end area are. 9. spring cable lug according to one or more of claims 1 to 8, characterized in that that the spring arms (9 and 10) from the bends (11) in the direction of the claws facing locking lugs (31 and 32) exhibit. 10. Spring cable lug according to claim 9, characterized in that the locking lugs (31 and 32) are angled outward in the end region. 11. Spring cable lug according to one or more of claims 1 to 10, characterized in that that an inner spring (33) between the spring arms (9,10), the guide tabs (17 and 18) is supported and overlapping is supported with the clamp ends (34 and 35) on the inner surfaces of the beads (15 and 16). 809881/0369