RU2100880C1 - Cable lug - Google Patents

Abstract

FIELD: electric wiring; termination of wires and cables, primarily aluminium-core ones. SUBSTANCE: cable lug has shell-type shank and contact system with hole for connecting cable lug to electrical equipment terminal lead. Shank and contact system are built integral of aluminium silicon-magnesium alloy; shank is provided with through hole whose axis is aligned with longitudinal axis of shank; at point where shank is joined with contact system hole has at least one step whose height makes up at least half the contact system thickness. EFFECT: improved reliability of core-to-lug joint and of joint between lug and terminal lead of electrical equipment; facilitated manufacture and reduced cost. 2 dwg

Description

 The invention relates to electrical work and may find application in the termination of wires and cables, mainly with aluminum conductors.

 Cable lugs are known (GOST 9581-80) containing a shank in the form of a tube and a clamping part ending with an eye.

 These ferrules are designed for crimping wires and cables.

However, this method of terminating wires and cables in this design does not allow for their stable connection, and the tip-output connection of electrical equipment requires the use of stabilization of electrical resistance, for example, color fasteners, plate springs or protective metal coatings
Known cable lug, which is selected as a prototype.

 Known tip contains made in the form of a glass shank and the contact part with a hole for connecting the tip to the output of electrical equipment.

 One of the main disadvantages of the known tip is the complex technology of its manufacture, which requires welding of the shank blanks and the contact part.

 Another disadvantage of the known design is the presence in the clamping part of the jumper, which does not allow for high-quality welding termination.

 The objective of the proposed technical solution is aimed at creating a cable lug that allows for reliable contacts of the connections "housing conductor" and "terminal output of electrical equipment" through the use of aluminum silicon-magnesium alloy while simplifying the manufacturing technology and reducing its cost.

 The problem is achieved in that in the cable lug containing a shank made in the form of a cup and a contact part with an opening for connecting the lug to the electrical equipment outlet, the shank and the contact part are made as a whole from an aluminum-silicon-magnesium alloy, the shank having a through hole, an axis which coincides with the longitudinal axis of the shank, and at the junction of the shank to the contact part, the hole has at least one step whose height is at least half fault contact portion thickness.

 The distinguishing features of the proposed technical solution are the shank and the contact part, made as a single unit of aluminum-silicon-magnesium alloy, a through hole made in the shank, the axis of which coincides with the longitudinal axis of the shank, the hole has at least one transition at the junction of the shank a step whose height is at least half the thickness of the contact part.

 Unlike the prototype, in which the individual parts of the tip - the shank and the contact part are interconnected by welding, the proposed design of the cable tip is made as a single whole part from an aluminum silicon-magnesium alloy by stamping, which greatly simplifies the technology of manufacturing the tip and reduces it cost.

 Making a through hole in the shank with a step in the place of its transition to the contact part creates a reliable, one-piece metal conductor "tip", the reliability of which is also increased by the use of welding, instead of crimping, as is the case with known tips.

 In addition, it is the use of aluminum silicon-magnesium alloy that allows you to increase the reliability of the connection "tip output electrical equipment" with copper leads, eliminating the need for stabilization of electrical resistance.

 In FIG. 1 shows a cable lug, a general view; in FIG. 2, a - General view of the tip, in a section; in FIG. 2, b the option of installing the core before welding; figure 2, in the option of ending the core by welding.

 The cable lug (Fig. 1, 2) contains a shank 1 made in the form of a glass and a contact part 2 with an opening 3 for connecting the lug to the terminal of electrical equipment. The shank 1 and the contact part 2 are made as a single unit. In the shank 1 there is a through hole 4 whose axis coincides with the longitudinal axis of the shank (Fig. 2). At the junction of the shank 1 to the contact part 2, the hole 4 of the shank 1 has a step 5. The core 6 (Fig. 2b, c) is placed in the shank 1 and fixed in the tip using a welded joint 7 (Fig. 2c).

 The proposed design of the cable lug is made of tape of aluminum-silicon-magnesium alloy of increased hardness by stamping as a single unit, this eliminates the time-consuming operations of connecting the elements of the lug by welding. The core 6 is placed in the shank 1. In this case, a gap is formed between the contact part 2 and the core 6 due to the performed step 5 in the hole 4 of the shank 1 The core 6 placed in the shank 1 is welded to the tip, for example, by electric arc welding. When this occurs, the core 6 is melted, and the melted metal, spreading, penetrates the shank 1 and evenly fills the gap, forming a reliable all-metal connection "core tip".

 Thus, this design of the cable lug allows you to provide reliable contacts, simplify the manufacturing technology and reduce its cost.

Claims (1)

 A cable lug comprising a shank made in the form of a cup and a contact part with an opening for connecting the lug to the output of electrical equipment, characterized in that the shank and the contact part are made integrally of an aluminum-silicon-magnesium alloy, the shank having a through hole, the axis of which coincides with the longitudinal axis of the shank, and at the junction of the shank to the contact part, the hole has at least one step, the height of which is at least half the thickness of the contact oh part.

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