JPH0623682U - Connecting device for welding gun cable and welding transformer - Google Patents

Abstract

(57) [Abstract] [Purpose] For welding guns that eliminates wear and damage to the fastening parts that occur during use and that does not result in poor electrical connection of these parts, and that has a variable connection direction for the welding gun cable. To provide a connecting device between a cable and a welding transformer. [Structure] The terminal portion 3a of the welding gun cable 1 is brought close to the end of the terminal portion 3b of the welding transformer 2, and a pair of plate-like connecting members 4, 4 abutting on the outer side thereof are bolted. In the device for connecting the welding gun cable and the welding transformer so as to be sandwiched and connected, the terminal portion 3a of the welding gun cable 1 is not swingable with respect to the end of the plate-like connecting tool 4, and the connecting angle is 2 degrees. Bolted so that it can be switched over more than one step.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connecting device for a welding gun cable and a welding transformer, which can firmly fix the welding gun cable to the welding transformer for a long period of time without causing wear damage even when the robot welding machine is violently moved. It is a thing.

[0002]

[Prior art]

 Recently, for example, most spot welding operations in the automobile industry are performed by robot welding, and both ends are used as a welding gun cable connector for connecting a welding gun cable attached to a robot to a welding transformer. It is widely used that the child part is sandwiched between a pair of plate-like connecting tool bodies and connected.

However, in the conventional device for connecting the welding gun cable and the welding transformer, the connector body and the welding gun cable terminal are arranged such that the connecting direction of the welding gun cable is variable. Since the pin and the part are swingably connected to each other, there is a problem in that the connecting part is worn and damaged at the time of swinging, resulting in poor connection.

[0004]

[Problems to be solved by the device]

 The present invention solves the above-mentioned conventional problems, eliminates the wear damage of the fastening portion that occurs during rocking, has no connection failure, and has a variable welding gun cable connection direction. It was completed for the purpose of providing a connecting device between a welding transformer and a welding transformer.

[0005]

[Means for Solving the Problems]

 A welding gun cable-welding transformer connecting device according to the present invention made to solve the above-mentioned problems is configured so that the terminals of the welding gun cable are brought close to the terminals of the welding transformer. In a connecting device for a welding gun cable and a welding transformer, which are sandwiched and connected by a pair of plate-like connecting members which are brought into contact with the outside of the portion and bolted, the plate-like connecting device is a terminal of the welding gun cable. It is characterized in that it is bolted so that it cannot be rocked with respect to the section and the connection angle can be switched in two or more steps.

[0006]

[Action]

 With this structure, the ends of the terminals of the welding gun cable are brought close to the ends of the terminals of the welding transformer, abutted on the outside of both terminals, and bolted together. It is used in the same way as a conventional welding gun cable-welding transformer connecting device in which the plate-like connecting tool is not swingable with respect to the terminal part of the welding gun cable. Since there is no electrical connection failure in this part caused by abrasion damage of the fastening part, and the connection direction of the welding gun cable is variable, the welding gun cable connection direction can be arbitrarily changed as necessary. Can be changed.

[0007]

【Example】

 The present invention will now be described in detail with reference to the illustrated embodiment. The drawing shows an example of connecting the welding gun cable 1 and the welding transformer 2 connected to a robot welding machine for spot welding of an automobile with respective terminal portions 3a and 3b. Reference numeral 4 is a plate-like connecting member made of a conductive metal such as copper for sandwiching and fixing the terminal portions 3a and 3b.

In this plate-like connecting tool 4, a large number of conductive metal thin plates 4a are overlapped and the middle part thereof is left as a flexible part 4b for brazing, and the outermost surface of the brazing part is provided with a silver matt. The flexible portion 4b is provided at a portion corresponding to a space 5 between the terminal portion 3b of the welding transformer 2 and the terminal portion 3a of the welding gun cable 1 when the welding copper plate is integrally attached. Is configured to be located. In addition, in the connecting portions at both ends of the plate-like connecting tool 4, there are a bolt inserting hole communicating with the terminal portion 3a of the welding gun cable 1 and a bolt inserting hole communicating 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 by the plurality of bolts 6 so as not to swing.

Further, the lower end of the plate-like connecting member 4 is formed with a horizontal end surface 8a and an inclined end surface 8b, and one of the horizontal end surface 8a and the inclined end surface 8b is a stepped portion of the outer surface of the welding gun cable 1. 7, the welding gun cable 1 is also bolted so that the welding gun cable 1 cannot swing with respect to the end of the plate-like connecting tool 4 and the connecting angle can be switched between 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 such a structure, the welding gun cable 1 and the welding transformer 2 are connected by sandwiching and fixing the terminal portions 3a and 3b of the welding gun cable 1 and the pair of plate-like connecting members 4 and 4, respectively. This is similar to the conventional connecting device of this type, but even when tightened by a plurality of bolts 6, one bolt 6 and the horizontal end face 8a or the inclined end face 8b contact the step 7 Even when they are connected, or when both are used together, the terminal portion 3a of the welding gun cable 1 is incapable of swinging with respect to the plate-like connecting tools 4 and 4, so that the fastening portion is not damaged due to wear. There is no possibility of electrical connection failure due to the disappearance of the wire, and the connecting direction of the welding gun cable 1 can be arbitrarily changed as necessary.

Further, the plate-like connecting tool 4 is made up of a large number of conductive metal thin plates 4a, and at least the intermediate portion between the terminal portion 3b of the welding transformer 2 and the terminal portion 3a of the welding gun cable 1 is provided. If the portion corresponding to the space 5 is provided with flexibility, the plate-like connector 4 is sufficiently deflected even when the robot welding machine is moved violently, and the plate connecting member 4 is fastened to the connection portion with the respective terminal portions 3a, 3b. The generated load is effectively absorbed, and the fastening failure during use of the robot welder can be prevented more reliably, which secures the welding gun cable 1 and welding transformer 2 for a long period of time. Will be done.

[0012]

[Effect of device]

 As is apparent from the above description, the present invention is characterized in that the plate-like connector is bolted to the welding gun cable terminal portion so that it cannot be swung and the connecting angle can be switched in two or more steps. The structure is simple because the connection part of the welding gun cable can be oriented in any direction as needed while the fastening part is not worn out and damaged during use, resulting in poor electrical connection. Therefore, as a connecting device between a welding gun cable and a welding transformer, which has eliminated the conventional problems and the advantages that it can be provided at low cost, its practical value is extremely large.

[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

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H02G 15/08 7028-5G

Claims (4)

[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). In the connecting device between the welding gun cable and the welding transformer, which are sandwiched and connected by a pair of plate-like connecting tools (4) and (4) that are abutted against and bolted to the welding gun cable (1), The welding gun cable, characterized in that the terminal portion (3a) is not swingable with respect to the end portion of the plate-like connecting tool (4) and is bolted so that the connecting angle can be switched between two stages or more. And a welding transformer connection device. 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 4. The plate-like connector (4) is composed of a large number of thin conductive metal plates (4a), and at least the intermediate portion thereof (3b) of the welding transformer (2) and the welding gun cable (1). Terminal part
The part corresponding to the space (5) between (3a) and the flexible part (4
The device for connecting a welding gun cable and a welding transformer according to claim 1 or 2 or 3 as b).