SU1115894A1 - Screw driver with automatic feed of fasteners - Google Patents

Abstract

SCREW OFF WITH AUTOMATIC FEEDING OF FASTENING PRODUCTS, comprising a housing with a control channel, a drive mounted in the housing with a possibility of reciprocating movement a head for receiving screws, having symmetrical grooves on the outer surface and carrying hinge levers, a working tool connected to the drive, and a control mechanism, characterized in that, in order to increase the reliability of holding and centering the screws, the head is provided with additional hinged levers, and the control mechanism is designed as moving in the grooves of the tongue, on one of the ends of the latter, a step with a bevel is made, interacting with the control channel.

Description

Recounted 00

with

four

The invention relates to a mechanized tool with an automatic feeding fasteners and can be used to automate technological processes in assembly plants.

A screw driver with an automatic knockout screw is known, which contains a cornus, a working tool placed in it with the possibility of reciprocating movement, a receiving head, channels located in it and in the case — vertical for the working tool, and inclined for screw nosing, the tip mounted on it is spring-loaded articulated levers 1.

The disadvantages of the known wipto-wrench are the complexity of the design, the absence of a mechanism that guarantees the supply of the next screw only when the previous screw is screwed into the matching part.

The closest in technical essence to the invention is a screwdriver with automatic feeding of fasteners, comprising a housing with a control channel, a drive mounted in the housing with the possibility of reciprocating movement of a head for receiving screws, having symmetrical grooves on the outer surface and bearing hinged levers, a working tool associated with the drive, and a control mechanism | 2.

The disadvantage of this device is that the control device provides the supply of screws with a set of 1x us / yvs only when screwing up parts of certain sizes and does not allow tuning to work from an electrical signal. In addition, there is no mechanism in this screwdriver that ensures the retention of the absorbed in the position at which some of its threaded end would protrude from the head, which makes it difficult for the screw to fit into the hole of the matching part; |, and reduces the reliability of retention and 11ir1 screws.

The purpose of the invention is to increase the reliability of holding and centering the screws.

The goal is achieved by the fact that in a screwdriver with automatic feeding of fasteners, comprising a housing with a control channel, a drive mounted in the housing with the possibility of reciprocating movement of a head for receiving screws, having symmetrical nazyami on the outer surface and bearing articulated levers, a working tool. associated with the drive, and the control mechanism, the head is equipped with additional hinged levers, and the control mechanism is designed as a movably mounted in the slots of the tongue, from the ends of the latter, a step with a bevel is made

interacting with the control channel.

FIG. 1 shows a viptovert, a cut; in fig. 2 is a section A - A of FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4 - lower part of the head for receiving screws in cooperation with the mating parts of various sizes.

The automatic screwdriver screwdriver contains a split housing 1, with a control channel 2.

In the housing 1, a head 3 is mounted for reciprocating movement for receiving fasteners. The head 3 is spring-loaded along the axis by a spring 4. On the outer surface of the head 3 there are symmetric | ases 5 in which there is an adjusting mechanism, made in the form of a tongue 6, on one of the ends 7 of which there is a ledge 8 with a bevel 9, interacting with channel 2 by means of a lever 10, which is pivotally mounted on the axis 11 of an electric micro-switch / t 12 in a protective casing 13 rigidly mounted on the head 3.

In the head 3, on the axes 14, the arms 15 (receiving), which are designed to hold and center the grippers 16, are pivotally mounted.

The spring ring 17 presses the levers 15 to the head 3. The head 3 is provided with additional levers 18 (thrust) mounted on the axles 14.

The spring ring 19 will tighten the levers 18 to the levers 15. The levers 18 secure the protrusion of the threaded rod of the screw 16 from the head 3.

In case 1, spindle 21 is mounted on bearings 20. In tool box 21, working tool 22 is rigidly fixed, in slot 23 of which blade 24 is fixed.

The position of the key 6 in the grooves 5 is adjusted by means of the lever 25 and the screw pair 26. Screws 16 are fed to the blade 24 of the working tool 22 via channel 27. Coaxially with the channel 27, a nipple 28 is fixed, the end 29 of which is coe.iiinen with a transport tube r -; ni tov (not shown).

The screwdriver is operated as follows.

From a piecewise dispensing mechanism (not shown), screw 16 is compressed air through a transport tube (not shown) and channel 27 is fed to head 3. In the final stage of flight, screw 16 pushes the stop levers

18, the pre-force of the spring ring

19. After the screw 16 has fallen on the receiving levers 15, the levers 18 are closed, while the protrusions of the levers 18 block the channel 30, preventing BHFiTa 16 from moving upwards.

Then, the protruding part of the screw 16 is inserted into the hole of the parts to be connected, applying an axial force to the housing 1, and, overcoming the resistance of the spring 4, the rotating working tool 22 is brought into contact with the screw 16. The blade 24 of the working tool 22 falls into the slot of the screw 16, ensuring that it is screwed into the part.

A distance equal to the sum of the stroke of the working tool 22 before contact with the screw 16 and the value H (Fig. 4), which guarantees the screw 16 in the assembled part, the lever 25 rigidly connected in the axial direction with the tool 22, interacts with the ledge 8 of the key 6, moves it into the groove 5. The key 6 with a bevel 9 presses the lever 10, which includes an electrical microswitch 12.

After the screwing process is completed, a torque limit clutch (not shown) is activated, located outside the screwdriver, ensuring that the tool 22 stops together with the pin 21 and the flexible shaft (not shown). The axial force from the housing 1 is removed, and under the action of the spring 4, the tool 22 returns to its original position, opening the channel 30 for the passage of the screw 16.

At the end of the stroke, the lever 25 interacts with the step 8 of the pin 6, moving it into the groove 5. The key 6 releases the lever 10 and the electric microswitch 12 is turned off. Turning on and off the microswitch 12 is a signal for supplying the follower screw 16. In this case, the previous screw 16 left the head 3, the receiving screw screws 16, and the working tool 22 released the channel 30 for the screw 16 to enter.

When working with parts of other sizes, the value of H, guaranteeing the baiting of the screw 16, is different (see Fig. 4). Following this operation, the position of the working tool 22 and the lever 25 rigidly connected with it in the axial direction, which ensures the screwing of the screw 16, also changes.

This screwdriver can be quickly retuned to work with parts of different sizes. To do this, it is enough to set the lever 25 to a new position by means of a screw pair 26, which ensures the inclusion of the electric microswitch 12 only under the condition that 16

left the head 3, and re-fix the lever 25 with the screw pair 26, the position of the screw pair 26 when working with parts of different sizes does not change, since it guarantees that the tool 22 will release the channel 30 for the passage of the screw 16.

This design of the control mechanism allows the mechanism to control the output of screws 16 not only from an electrical signal, but also from a pneumatic signal. For this, it is sufficient that the lever 10 acts on the tanan of the pneumatic channel (not shown). Opening and closing this channel will be a pneumatic signal for the delivery of the next screw 16.

Claims (1)

AUTOMATIC FASTENING SCREWDRIVER, comprising a housing with a control channel, a drive mounted in the housing with the possibility of reciprocating movement of the head for receiving screws having symmetrical grooves on the outer surface and carrying articulated levers, a working tool associated with the drive, and a control mechanism , characterized in that, in order to increase the reliability of holding and centering the screws, the head is equipped with additional articulated levers, and the control mechanism is made in the form of movable installed in the key slots, one of the ends of the latter formed with a bevel shoulder interacting with a control channel.