RU1784108C - Connection clamp - Google Patents

Abstract

Use in electrical engineering, in particular in connection terminals of low voltage circuit breakers SUMMARY OF THE INVENTION The connection terminal comprises a housing 1 made of an electrically conductive material, a clamping screw, a screw 3, securing the clip to the terminal 4 of the switch. The housing 1 has a window 5 for accommodating the cable. A longitudinal rectangular groove is located at the intersection with the socket of the clamping screw 2. In the head of the screw 3, recesses 9 are made by deformation (punching or recessing) with the possibility of placing the material of the screw head 3 in the groove. The material of the screw head 3 forms a protrusion 10 2 sections 7 silt

Description

With

with

The invention relates to electrical engineering, in particular to the connecting terminals of low-voltage circuit breakers in a plastic housing

Clips are known for connecting the terminals of a switching apparatus to external conductors in the form of a cable, made of an electrically conductive material in the form of a rectangular parallelepiped containing a window for accommodating the cable and a threaded hole in the base of the clamp.

The clamps are fastened to the switch terminals on the side of the switch plane using a bolt passing through the hole in the switch terminal and screwed into the threaded hole of the clamp. To prevent unscrewing, the bolt is equipped with a spring washer that rests on a simple washer since this clamp

the bolt head is located close to the support surface of the switch; it is closed with a special insulating cover

Thus, four parts are used to fasten and insulate the clamp, thereby increasing the material consumption and labor intensity of the product.

The closest in technical essence to the claimed technical solution is a connection clamp for a low voltage apparatus. This clip comprises a window for accommodating the cabel screw for pressing the cable against the inner surface of the window; a receptacle for receiving a screw head securing the clamp to a threaded outlet hole. The clamp is fastened on the front side of the circuit breaker with a countersunk screw screwed into the threaded hole of the circuit breaker outlet, however, when the circuit breaker is operated, it is possible that the generator

and

About 00

with

involuntary unscrewing and, as a result, contact disruption in the circuit, which reduces the reliability of contacting.

In addition, there is a special part in this clamp, which is attached to the clamping screw, the presence of which leads to an increase in the material consumption and laboriousness of the clamp.

The aim of the invention is to increase the reliability of contacting, reduce the material consumption and the complexity of the connection terminal of the circuit breaker.

The goal is achieved in a connecting clamp for connecting an external conductor in the form of a cable to the terminal of a circuit breaker made of an electrically conductive material containing a window for placing the cable, a screw for pressing the cable to the inner surface of the window, a socket for receiving the screw head securing the clip to the threaded hole output topics. that in the case of the connecting clamp on the surface of the window, at least one longitudinal groove is made in intersection with the socket for the screw head with the possibility of accommodating in it the material of the screw head in which the recesses are made by deformation.

It is precisely the fact that in the case of the connecting clamp on the window surface there is made at least one longitudinal groove in the intersection with the socket to the screw head with the possibility of accommodating the head material in it. in which the depressions are made by the deformation method, an increase in contact reliability, a decrease in material consumption and labor intensity are achieved.

It is possible to make a screw holding the clamp with a conical or cylindrical head.

The housing of the connecting clamp may have two or more longitudinal grooves located in intersection with the socket. The groove of the connecting clip may have a conical part to center the cable in the clip window.

In FIG. 1 shows a connection clamp assembly, front view: in FIG. 2 same top view; in FIG. 3 is the same, side view with a cut along the axis of symmetry; in FIG. 4 is a section AA in FIG. 3; in FIG. 5 and 7 - clamp housing; in FIG. 6 is a section BB in FIG. 5

The connecting clamp comprises a housing 1 made of electrically conductive material, a clamping screw 2, a screw 3 for attaching the clamp to the terminal 4 of the switch. In the housing 1 of the clamp, a window 5

cable placement (not shown) a threaded hole 6 for the clamping screw 2 and a socket 7 for the head of the screw 3. at least one longitudinal groove 8 located in

at the intersection with socket 7 In the screw head 3, recesses 9 are made by deformation (core or embossing) with the possibility of placing the material of the screw head 3 in the groove 8. Material of the screw head 3

0 forms a protrusion 10. The longitudinal groove 8 may have a conical portion 11 for centering the cable in the connection clamp window 5.

Connection clamp apply

5 as follows

The housing 1 is installed on the output 4 of the switch and fastened with a screw 3. Then, in the head of the screw 3, recesses 9 are made by deformation, resulting in

0 the material of the screw head 3 forms a protrusion 10, which fits into the groove 9. located in intersection with the socket 7. The protrusions 10 thus obtained do not allow the screw 3. to be unscrewed. This ensures reliable contact between the terminal and the terminal of the switch.

The claimed device in comparison with the prototype provides reliable contacting of the supply cable with the output

Claims (3)

0 switch prevents self-loosening of the screw and has a lower material consumption, since it does not have a part connected to the clamping screw. 5 1. A connecting clamp for connecting an external conductor in the form of a cable to the terminal of the circuit breaker made of conductive material, containing a window for placement 0 cable, screw for clamping the cable to the inner surface of the window, socket for receiving a screw head securing the clip to the threaded hole of the terminal, characterized in that, in order to increase 5, reliability of contacting, reduction of material consumption and laboriousness in the housing of the connection clamp on the window surface is made in intersection with the socket for the screw head, at least one longitudinal groove with the possibility of accommodating the material of the head in which the recesses are made by deformation. 2. The clamp according to claim 1, characterized in that. that the screw holding the clamp can 5 have a conical or cylindrical head. 3. Clamp popp 1i2 characterized in that the groove may have a tapered portion for centering the cable in the clamp window. FIG. At / X 5 1 S FIG. 5 Fugue. 5 4GM FIG. 2 Ј. 5 Aa FIG. 4 6-6 FIG. 6 Riga 7