SU383565A1 - DEVICE FOR ASSEMBLY - Google Patents

Description

one

The invention relates to the field of engineering.

Apparatus for assembling articles with fasteners is known. The devices consist of a pneumatic wrench, orienting and feeding devices (fasteners to the assembly place with compressed air). At the assembly position, the fasteners are oriented relative to the assembled product and screwed together. Fasteners are supplied from different bins, which complicates the design of the hand tool.

The aim of the invention is to simplify the design.

This goal is achieved by fixing a hollow cylinder on the air motor housing, in which two disks rotated from the air motor are placed on the shaft of the wrench, with an axially movable axle with screws and nuts for the hollow cylinder.

FIG. 1 shows the proposed device, a general view; in fig. 2 is a section along A-A and BB in FIG. one; in fig. 3 - assembly position; in fig. 4 shows sections along BB and D - D in FIG. 3

A pneumatic wrench / rotary type is tightly fitted with a cylindrical bunker 2 so that the exhaust ports 3 are wrenches / are inside the bunker. On the shaft

4 wrenches are rigidly worn with disks 5 and 6, having a small taper above. Disk 5 divides the cavity of the hopper 2 into two parts - the upper B and lower N.

The upper cavity B has an opening closed with a quick-release lid 7, the lower cavity H has an opening closed with a quick-release cover 8. In cavity B, nuts 9 are poured (see Fig. 2) into the lower

cavity H - screws 10.

A sleeve 11 is attached to the lower end of the hopper 2, in which the pin 12 is located. It is pressed down by the spring 13 and is locked in the sleeve by a pin 14 which passes

through the slot in it. At the end, a brace 15 is fastened, in which are oriented screws 10 and nuts 9.

A screwdriver 16 is seated on the shaft 4 end coming out of the housing. Out of the hopper are two

flexible tubes 17 and 18, which are secondly connected to their brackets 15.

To the handle 19 of the wrench / attached the hose 20 for the supply of compressed air. The air entering the body of the wrench rotates

its rotor and shaft 4, with the disks 5 and 5 also rotating.

Screws 10 (see Fig. 3-4) in the bracket 15 are located on the plates 21, hanging on them with the leg down. From the bottom, the ends of the screws 10 are separated by a plate 22. The nuts in the chute 23 are below 9. The chute is attached to the bracket 15 by means of a pad 24. The nuts 9 are covered in the chute by the plate 25 on the top. 26 and the printed circuit board 27. The screw 10 is in the rest position under the screwdriver 16 and fixed with the help of a flat triangular spring 28 (see Fig. 1) and two levers 29 (see Fig. 4), spring-loaded with flat springs 30.

Screws 10 are poured into the cavity H of the hopper 2, nuts 9 are inserted into the cavity B of the hopper 2, and the hopper is closed. The air supply to the pneumatic wrench / is turned on, the shaft 4 begins to rotate with the disks 5 and 5. The centrifugal forces relate the nuts and screws to the walls of the housing, the nuts and screws begin to rotate along with the disks 5 and 6. And the screws 10 and the nuts 9, the centrifugal forces are pressed against the cylindrical surface of the hopper 4.

The compressed air, the exit from the air motor through the openings 3, fills the cavities B and H and begins to flow out into the atmosphere through the tubes 17 and 18. The rest of the interfaces in the bunker are sealed. The air streams flowing through the tubes 17 and 18 capture the screws 10 and the nuts 9 and begin to mix them through the tubes 18 and 17. The jets of air intensively act on the parts being moved in the tubes, and the tubes 18 and 17 very quickly fill them.

Note that the hopper can be filled with compressed air not from the wrench 1, but directly from the pneumatic network, but in this case the air flow rate will increase. For the present case, the air energy is used twice and the overall efficiency of the assembly device is increased.

The screws 10 go through the tube 18 in two positions, but, falling on the strips 21 (see Fig. 4), they are turned with the leg down, which is promoted by the mixed position of the center of gravity and the aerodynamic effect of the air stream.

The nuts 9 are oriented in the tube 17 along the planes and the turnkey dimension, for which the tube 17 has a rectangular cross section.

The design of the screwing mechanism is made so that the axes of the front screws 10 and the nuts 9 coincide with the axis of the screwdriver.

The plate 27 and the chassis 26 are manually fed into the make-up area so that the holes where the screws 10 are inserted are aligned. That hole, where the screw is inserted, is brought under the screwdriver, then by pressing the other hand on the handle 19 of the wrench, the entire device is lowered downwards.

In this case, the bracket 15 is stationary (it is on the support), therefore the sleeve // goes down the finger 12, compressing the spring 13. The screwdriver 16, rotating, seizes the screw 10 by the slot and passes it down, inserting it into the holes in the chassis

26 and plate 27. A screw 10, having passed through the holes in them, baits on the nut and is screwed into it. Having tightened the nut on the screw up to the stop (up to the specified torque), the screwdriver 16 begins to turn relative to the shaft 4, for which a maximum torque coupling is inserted between them (not shown in the drawing). The knot screwed at this point is taken out, the nut 9 easily goes out of the socket of the chute 23, and another hole of the same chassis 26 with the board 27 is brought under the screwdriver 16. points. The wrench can be hung on a hook,

so that the worker does not hold him all the time in his hands. It can be hung on a pantograph. Suspension wrench depends on the specific conditions of the workplace collector.

Subject invention

A device for assembling, for example, a chassis with printed circuit boards of a television set by means of fasteners oriented with compressed air through a tray to an assembly position, an air wiper, characterized in that, in order to simplify the design, at one end of the air wiper body a bunker is fixed, inside which is on the shaft

The wrenches are fitted with disks that, with the walls of the bunker, form containers for fasteners and discard the follower to the outlet openings of the bunker connected to the supply trays.

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