SU403573A1 - THE DEVICE FOR FASTENING OF TIRES - Google Patents

Description

one

A device for fastening tires is designed for mounting and fixing tires during their processing on roughing machines.

A device for fastening -shots is known, containing, rigidly mounted on the housing by means of levers, rigid mandrels with holders and a driving cylinder for diluting the mandrels, interacting with the levers.

In the known device, the mandrel, which fully corresponds to the internal profile of the tire, significantly exceeds the internal solution of its beads, through which it passes when fed into the tire. In this case, the mandrel, strongly deforming the area of the sidewalls of the tire, causes significant unwanted overvoltages of its frame.

It is proposed to mount the bracket holders on the levers by means of pivoting mandrels with rigidly fixed tangential plates interacting with the lugs mounted on the body, and to place the drive cylinder along the central axis of the body and equip it with a multifaceted lath fixed to its stem. This rail interacts with the toothed sectors that are firmly connected to the levers.

FIG. 1 shows the described device in the working position; in fig. 2 - the same.

The section along A - A in FIG. one; in fig. 3 is the same, view along arrow B in FIG. I.

The device contains a cylindrical body 1 with symmetrically spaced shaped grooves a and a crosspiece rigidly fixed in it 2. Levers 3 are hingedly mounted in each of the branches of the crosspiece. On the cylindrical end 4 of each of the levers there is a hinged arbor

o with rigidly fixed tangential plates 6. On the external, threaded surface of each of the pivot mandrels there is a lock-holder 8 fixed by a lock nut 7, on the semi-axis x 9 of which there is a freely rotating mandrel 10. On the cylindrical case there is a flange-mounted cylinder 11 with its multi-faceted rod 12 flanged gear rack 13, interacting with the gear sectors

14, which are rigidly connected to the levers.

In each of the branches of the cross, the stops 15 are rigidly fixed in the form of a tooth that is chamfered on one side and interacting with the plates. The device is fastened with the bracket 16 of the machine tool holder. The device works as follows. Before putting on a tire for roughing, the device is in a folded state.

Compressed air is fed into the supernatant cavity of the cylinder 11, while the rod 12 with the toothed rack 13 moves forward. The toothed sectors 14, which are engaged with the rail 13, are tilted to rotate around the axes 17. In this case, the corners 10 are in the unfolded initial position and pass freely between the sides of the tire. Being in a squiggle, the mandrels continue to rotate relative to the axes and become in a working position corresponding to the internal profile of the nodus.

When turning each of the levers at a certain angle (corresponding to the full entry of the mandrels into the tire), the plates 6 of each of the mandrels 5 move to the corresponding stops 15. Continuing to move progressively, the redraw begins to turn around its geometric axis at the free end of the lever 3 due to the turning moment created by the kinematic a pair of plastic 6 - an emphasis 15. A mandrel with mandrels rigidly fixed on them and a mandrel after the interaction of the plate with the emphasis participates in a complex movement: turning about in relative axis of rotation and at the end of the lever. Further, the mandrels of the mandrels, turning - at the calculated angle, descend from the stop. The final adjustment to the full angle of rotation of the mandrel one of its ends runs over the end surface of the body in the area of the figure groove, rests against it and, continuing to move forward, finally turns and firmly rests with its ends onto the edges of the body figure groove.

The compressed air is supplied to the rod end of the cylinder 11, the lever from the mandrel is turned about the axes, and the mandrel leaves the housing groove. With this plate

one CONCOL1 slides on the edge of the inner guide of the cross 2. Plastnna, having a stepped shape, rotates due to the interaction with the edge of the indicated guide under the action of the rotating moment formed by the kinematic pair plate-cross of the cross. At this moment, the stops are inside the plate step and do not interfere

finally. turn the mandrels with plates and their further dislocation from left to right.

Thus, the process of turning the mandrels to 90 ° with the plant in the tire and removing them

from there, it is carried out when the cores are in the tire, and the plant and the removal of the mandrels from the lokrat are at the moment when the profile of the mandrel is turned relative to the profile of the tire at an angle of 90 °.

Subject invention

Claims (2)

1. A device for fastening tires, containing rigid mandrels with hinges mounted on the body by means of levers adapter holders and a drive cylinder for breeding mandrels, which interact with levers, characterized in that, in order to prevent deformation of the bead of the tires when making the mandrels, mandrel holders are mounted on the levers by means of rotatable mandrels with rigidly fixed tangential plates interacting with the stops, which installed on the case. 2. A device according to claim 1, characterized in that the drive cylinder is located along the central axis of the housing and is provided with a multi-faceted rail mounted on its stem, which interacts with the toothed sectors that are rigidly connected with the levers. 1 FIG. g