JPH0756134Y2 - Connecting device for welding gun cable and welding transformer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention provides a welding gun cable capable of securely fixing a welding gun cable to a welding transformer for a long period of time without causing wear damage even when the robot welding machine is vigorously moved. The present invention relates to a connecting device with a welding transformer.

[0002]

2. Description of the Related Art Recently, most of the spot welding work in the automobile industry, for example, is performed by robot welding, and a welding gun cable connector for connecting a welding gun cable attached to a robot to a welding transformer. As such, one in which both terminal portions are sandwiched and connected by a pair of plate-shaped connector main bodies is widely used.

However, in a conventional welding gun cable / welding transformer coupling device, the coupling body and the welding gun cable terminal are arranged so that the welding gun cable coupling direction is variable. Since the pins are swingably connected by one pin, there is a problem that the fastening portion is worn and damaged at the time of swinging to cause connection failure.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art by eliminating the wear damage of the fastening portion that occurs during rocking and no connection failure, and the welding gun cable connection direction. The present invention has been completed for the purpose of providing a connecting device between a welding gun cable and a welding transformer, in which

[0005]

The welding gun cable and welding transformer connecting device according to the present invention, which has been made to solve the above-mentioned problems, has a welding gun cable terminal at the terminal end of the welding transformer. in the coupling device of the welding gun for cable so as to sandwich connected with welding transformer in close proximity to parts of the terminal abuts against the outer surfaces of the terminal portions by a pair of plate-like connecting component which is bolted, the plate-like The connector
Consists of many thin sheets of conductive metal, at least in the middle
Of the welding transformer and the end of the welding gun cable
The part corresponding to the space between the child part is a flexible part.
The plate-like connector is bolted to the terminal of the welding gun cable so that it cannot be swung and the connection angle can be switched in two or more steps.

[0006]

With this construction, the pair of plates which are brought into close contact with the terminals of the welding gun cable so that the terminals of the terminals of the welding gun cable are brought into contact with the outsides of both terminals and bolted together are provided. It is used in the same manner as the conventional connecting device for welding gun cables and welding transformers that is clamped and connected by a plate-like connector, but swings the plate-like connector with respect to the terminal portion of the welding gun cable. Since it is impossible, the electrical connection failure of this part caused by abrasion damage of the fastening part is eliminated, and the connecting direction of the welding gun cable is variable, so the connecting direction of the welding gun cable can be arbitrarily changed as necessary. Can be changed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the illustrated embodiments. The drawing shows an example of a case where a welding gun cable 1 and a welding transformer 2 connected to a robot welding machine for spot welding of an automobile are connected by respective terminal portions 3a and 3b. It is a plate-like connector made of a conductive metal such as copper for sandwiching and fixing the terminal portions 3a and 3b.

The plate-like connecting member 4 is brazed by laminating a large number of conductive metal thin plates 4a and leaving the middle part thereof as a flexible part 4b to be brazed, and the outermost surface of the brazed part is silver-plated. The flexible portion 4b is located at a portion corresponding to the space 5 between the terminal portion 3b of the welding transformer 2 and the terminal portion 3a of the welding gun cable 1 when used as an integrated copper plate. It is configured as follows.
In addition, in the connecting portions at both ends of the plate-like connecting tool 4, there are provided a bolt inserting hole which communicates with the terminal portion 3a of the welding gun cable 1 and a bolt inserting hole which communicates with the terminal portion 3b of the welding transformer 2. Each of the bolts 6 is inserted, and the terminal portion 3a of the welding gun cable 1 is connected to the end portion of the plate-like connecting tool 4 in a non-pivotable manner by the plurality of bolts 6.

Further, the lower end of the plate-like connector 4 is formed with a horizontal end face 8a and an inclined end face 8b, and the horizontal end face 8 is formed.
Either a or the inclined end surface 8b is brought into contact with the step portion 7 on the outer surface of the welding gun cable 1, so that the welding gun cable 1 cannot be swung with respect to the end portion of the plate-like connector 4. In addition, bolts are tightened so that the connection angle can be switched in two or more steps. Reference numeral 9 in the drawing denotes an auxiliary bolt insertion hole used for inserting the bolts 6 when the inclined end surface 8b is brought into contact with the step portion 7 on the outer surface of the welding gun cable 11.

In the structure thus constructed, the welding gun cable 1 and the welding transformer 2 are connected to each other at their terminal portions.
The point of connection by sandwiching and fixing 3a and 3b with a pair of plate-like connecting tools 4 and 4 is the same as that of the conventional connecting apparatus of this kind, but even when tightened by a plurality of bolts 6,
Even if the bolts 6 and the horizontal end face 8a or the inclined end face 8b are brought into contact with the step portion 7, or both are used together, the plate-like connecting tools 4 and 4 are for welding guns. Since the terminal portion 3a of the cable 1 is not swingable, there is no risk of wear and damage of the fastening portion and electrical connection failure, and if necessary, the welding gun cable 1 is connected. You can change direction.

Further, the plate-like connecting member 4 is composed of a large number of conductive metal thin plates 4a, and at least between the terminal portion 3b of the welding transformer 2 and the terminal portion 3a of the welding gun cable 1 in the middle thereof. If the portion corresponding to the space 5 is provided with flexibility, the plate-like connector 4 is sufficiently bent even when the robot welding machine moves violently, and the respective terminal portions 3 are formed.
The load generated in the fastening portion with a and 3b is effectively absorbed, and the fastening failure during use of the robot welding machine can be more reliably prevented, whereby the welding gun cable 1 and the welding transformer 2 are connected. Will be fixed firmly over a long period of time.

[0012]

As is apparent from the above description, the present invention provides a state in which the plate-like connector is not swingable with respect to the terminal portion of the welding gun cable and the connecting angle can be switched in two or more steps. By tightening the bolts, the fastening part will not be worn and damaged during use and electrical connection failure will not occur, and the connecting direction of the welding gun cable can be oriented in any direction as needed. In addition to the advantage that it can be provided at low cost because of its simple structure, it is of great practical value as a connecting device between a welding gun cable and a welding transformer, which eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cutaway front view showing an embodiment of the present invention.

FIG. 3 is a side view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Welding gun cable 2 Welding transformer 3a Terminal part 3b Terminal part 4 Plate-shaped connecting tool 4a Conductive metal thin plate 4b Flexible part 5 Space 6 Bolts 7 Steps 8a Horizontal end face 8b Inclined end face

Claims (3)

[Scope of utility model registration request] 1. The end of the terminal (3a) of the welding gun cable (1) is brought close to the end of the terminal (3b) of the welding transformer (2) and the outside of both terminals (3a), (3b). A welding gun cable and welding transformer connecting device which is sandwiched and connected by a pair of plate-like connecting members (4) and (4) that are abutted against and bolted to the plate-like connecting member (4). A large number of conductive metals
It consists of a thin plate (4a), at least the middle of the welding tiger.
Connector (2) terminal (3b) and welding gun cable (1) terminal
The part corresponding to the space (5) between the part (3a) and the flexible part (4
b), so that the terminal portion (3a) of the welding gun cable (1) cannot be swung with respect to the end portion of the plate-like connecting tool (4) and the connecting angle can be switched in two or more steps. A device for connecting a welding gun cable and a welding transformer, which has been tightened. 2. The step (7) is formed on the outer surface of the terminal portion (3a) of the welding gun cable (1), while the horizontal end face (8a) and the inclined end face (8a) are formed at the end of the plate-like connector (4). 8b) to form the horizontal end face
(8a) or the inclined end face (8b) is brought into contact with the step portion (7) of the welding gun cable (1), and the welding gun cable (1)
The welding gun cable and the welding transformer according to claim 1, wherein the bolt is fastened to the end of the plate-like connector (4) so that it cannot be swung and the connecting angle can be switched in two or more steps. Coupling device 3. A plurality of bolt insertion holes are provided at the terminal portion (3a) of the welding gun cable (1) and the end of the plate-like connector (4), respectively, and the plurality of bolt insertion portions are inserted. The welding gun cable (1) cannot be swung with respect to the end of the plate-like connecting tool (4) and the connecting angle can be switched to two or more steps by using a plurality of bolts (6) inserted in the holes for use The welding gun cable and welding transformer connecting device according to claim 1 or 2, which are bolted to