SU738020A1 - Device for squeezing cable shoes - Google Patents

Description

(54) DEVICE FOR REVERSING CABLE TIPS

I

The invention relates to crimping devices for connection by deformation of cable lugs with drives and can be used in electrical work in the manufacture of, for example, electrical wiring harnesses.

Hydraulic hand-operated crimping devices are known for connection by deformation of a cable lug with a wire 1.

This device contains a working power cylinder with a piston mounted in a housing, control valves, a pump whose plunger is operated by a handle, pressing jaws, one of which is stationary and provided with a die, and the other, movable, carries a punch and is equipped with a spring for returning the piston to initial position.

A disadvantage of this device is the inconvenience of operation. In the initial position, the movable sponge with a punch is rotated under the action of a spring so that it acts on the power piston and holds it in this position. In this case, the jaws are opened and the product can be installed for crimping. However, after installation

product (cable lug) in the matrix, it must be held by hand until the punch to the product. Maintaining the orientation of the products and observing the approach of the sponges is tiring and not convenient.

A device for crimping lugs is known, in which the workpiece is pressed against the die before crimping 2.

This device consists of a housing, a matrix for placing the product, a ram with a plunger on which the punch is attached, and a spring-loaded cup for pressing the product installed in the housing over the piston. The glass is spring-loaded in the direction of the matrix. The product is set in contact with the die before crimping the spring-loaded glass. The piston is reset to its initial position by moving the glass manually.

The drawback of the device is

Claims (2)

20 that it is necessary to manually return the plunger to its original position, and for this the glass must be moved a length longer than necessary to remove the product or install the next one, and therefore apply greater force to compress the spring than is necessary to remove the product or install the following. There are cases when the operator simply forgets to return the plunger to its original position. Therefore, increased attention is required from the operator, which complicates operation and creates inconvenience. The object of the present invention is to simplify operation by simultaneously pressing the product and returning the plunger to its original position. This is achieved by the fact that the punch is installed in a glass provided with an annular abutment interacting with the housing at the end of the free stroke of the piston and with a lever for moving it. Such a design allows not only to securely fix the tip before crimping, but also frees the operator from working to bring the device back to its original position, i.e., simplifies operation and provides convenience. FIG. 1 schematically shows the device in the initial position; in fig. 2 shows a hydrodistributing scheme (section A-A in FIG. 1). The device includes a housing 1 with a cylinder 2 and a power plunger 3. The plunger has a seat for mounting the matrix 4. Coaxially the power plunger in the housing is movably mounted with a glass 5 with a punch 6. The glass is spring-loaded towards the power plunger with a spring 7, which presses the punch 6 to the matrix 4 flush , and the power plunger 3 holds in the initial position. Lever 8 interacts with cup 5. By pressing the lever, the cup with punch can be moved away from the matrix with a gap sufficient to be inserted into the matrix of product 9. Cup 5 is equipped with an annular stop 10 which is intended to prevent efo from moving into the matrix. , as well as compression products. Hydraulic control valves are installed in the device case: suction valve 11, check valve 12, safety valve 13, drain valve 14 with control knob 15 and pump with plunger 16. Plunger is driven by swinging knob 17 on axis 18. The working fluid is stored in the reserve chamber 19 with a float 20. The device operates as follows. The lever 8 is pressed, and the cup 5 with the punch 6 moves away from the matrix 4. A gap is formed between the matrix and the punch, which allows the product to be easily laid in the matrix. With the release of the tonglet 8, the spring 7 moves the cup 5 with the plunger 6 toward the die and the plunger presses the article against the die 4. The plunger 16 of the pump is actuated by the knob 17. The working fluid is taken up by the pump plunger 16 from the backup chamber 19 through the suction valve 11 and is pushed through the check valve 12 into the chamber of the cylinder 2 under the power gap 3. As the fluid is pumped into the cylinder chamber, the power piston will move in the direction of the cup 5. Simultaneously with it and the cup 5 is compressed by the spring 7. When the annular stop 10 of the cup 5 reaches the end plane of the housing I, the movement of the cup 5 with the punch stops and the power plunger 3 will continue to move with the die in the direction glass, crimping the product. When the die is fully approached the punch, the crimp is terminated. When the die is fully brought into contact with the punch in the cylinder chamber, the pressure of the working fluid increases sharply, and the safety valve 13 opens automatically, and the pump handle 17 suddenly drops. The moment of operation of the safety valve is adjustable, which eliminates incomplete crimping of the product. To release the crimped product, it is necessary to turn the knob 15, which opens the drain valve 14. The pressure in the cylinder drops sharply and under the action of the compressed spring 7, the power plunger quickly returns to its original position, displacing fluid from under the plunger 3 into the backup chamber 19. After that, the drain valve closes and take out the crimped product by pressing the lever 8. The device is ready to crimp the next product. The proposed device allows an increase in labor productivity, since, in a known case, it requires increased attention, and in the proposed installer, it is relieved of this load, the working conditions are improved, and the operation of the tool is simplified. Claim device for crimping cable lugs comprising a punch coaxially located on the body and a power cylinder, on which plunger a matrix is fixed, as well as a spring-loaded glass for pressing the product, characterized in that the glass is mounted concentric to the punch to improve performance and supplied--. ring stop, interacting with the plunger, as well as rigidly connected with it lever, which serves for its reciprocating movement. Sources of information taken into account in the examination 738020 ",but. Patent of France No. 1164123, cl. At 25 V, pub. 1958. about 2. USSR author's certificate number 155205, cl. H 01 R 43/04, 1957. 738020