SU1234212A1 - Device for assembling and forming pneumatic tyre casings - Google Patents

Description

This invention relates to equipment; tire industry and can be used to assemble and shape radial tire pneumatic tire caps on forming diaphragm drums.

The purpose of the invention is to simplify the design of the device.

FIG. 1 shows the proposed device, a general view in longitudinal section; in fig. 2 - a mechanism for regulating the supply of working medium; in fig. 3 - the same, with elements for regulating the relative position of the pressure regulator and the pusher.

The device contains driving hollow shafts 2 and 3 mounted concentrically on frame 1 with flanges 4 and 5 mounted on them for fixing the diaphragm of the forming drum, drive hydraulic cylinders 7 for hollow shafts 2 and 3, supplying the working medium to the cavity formed by the elastic diaphragm 6 through the air support - water coupling 8 installed at the end of the hollow shaft 2.

The actuator 7 is designed to move the hollow shafts 2 and 3 along the axis of the forming drum and is made in the form of power hydraulic cylinders mounted on the bed 1. The rods 9 of the hydraulic cylinders of the drive 7 are connected with movable cross-bars 10. The cross members 10 are connected by bearings 11 to the hollow shafts 2 and 3

The device is equipped with a mechanism for regulating the supply of the working medium in the form of a base 15 mounted on the base 1, on which by means of a bracket

16 is mounted a pressure regulator 17 and a lever 18, made by two shoulders, is spherically mounted. One shoulder of the lever 18 is in contact with the brush 19 of the pressure regulator 17. The control mechanism for supplying the working medium is provided with an axially mounted pusher 20 mounted on the bed 1 mounted along the axis of symmetry of the device for interacting with the end of one of the hollow shafts 2 through the air coupling 8. The pusher 20 contacts the second arm of the lever 18. The arm of the lever 18 interaction with the rod 19 is made with a profile surface (Fig. 3).

The pressure regulator 17 is installed in the longitudinal groove 21 of the bracket 16. The lever 18 is attached to the base 15, which in the attachment points to the frame 1 has longitudinal grooves 22. The mutual position of the regulator

Pressure 17 and lever 18 can be adjusted. In the hollow shaft 2 is made channel 23.

The device works as follows.

Assembled tire carcass mounted on the flanges 4 and 5 of the forming drum (Fig. 1). Through the pressure regulator 17, the air inlet coupling 8 and the groove 21, the working medium — pressurized air — is supplied to the drum. The liquid is then fed into the hydraulic cylinders of the actuator 7, with the result that the brushes 9 of the hydraulic cylinders of the actuator 7 act on the movable cross braces 10, which move along the axis of rotation of the drum and through the sub-bases 11 move the hollow shafts 2 and 3 with flanges 4 and 5. At the same time, the flanges 4 and 5 approach each other, the diaphragm 6 is inflated, and the scaffold framework is formed. The hollow shaft 2 in its movement moves the pusher 20

0 (Fig. 2), which at the same time acts on the shoulder of the two shoulders lever 18. The double shoulders lever 18 rotates and with its other shoulder moves the rod 19 of the pressure regulator 17, thereby regulating the flow of the working medium into the diaphragm 6 of the forming drum.

The optimal molding mode is selected by moving the base 15 relative to the bed 1 along the longitudinal grooves 22. The optimum molding mode is also created by turning the two-arm lever 18, one of the arms of which is made profile. To more accurately create an optimal molding mode, move the pressure regulator 17 along the longitudinal groove 21 of the brace 16.

5 Upon completion of the tire carcass molding process, parts are applied to the molded carcass, rotating the drum from the drive 12 by means of a chain transmission 13 and an asterisk 14.

It is known that at the optimal mode

shaping The dependence of the shaping pressure on the stroke of the flanges has a slight curvature.

Considering the design of the proposed mechanism for regulating the supply of the working medium (Fig. 2), the following relationship can be obtained:

h

HI

: i)

sin a (L sin a -J- W cos a)

where / g is the stroke of the regulator

pressure, m;

H is the stroke of the axially movable flange, m;

/ - length of one arm of two shoulders, m;

L is the length of the other arm of the two shoulders arm, m;

(X is the angle between the shoulders of the two shoulders, hail.

The stroke of the pressure regulator valve is directly related to the pressure at the outlet of the regulator. From formula (1) it follows that the dependence / i / (//) is generally non-linear and the magnitude of the non-linearity (curvature) can be changed by changing the angle a (in the particular case of a 90 ° the dependence / g / (I) is linear ). Thus, the proposed design of the mechanism for regulating the supply of the working medium (even when the arms are straight and straight) can be used to obtain the necessary relationship between the molding pressure and the stroke of the flanges. Since the proposed construction does not provide for the possibility of changing the angle a (this would be y: it would falsify the construction), the magnitude of the nonlinearity can be changed, changing the magnitude of /. In this case, the length (L) of the other arm is determined from the expression derived from (1)

L H (2i hsin2a) 2hsin a

(2)

From the formula (1) it follows that when cm cm cm, and when, 5 cm, / g 0.437 cm; cm, 845 cm; cm, 347 cm; cm, 807 cm

Decreasing / to 3 cm, according to the formula (2) with cm, we get 613 cm. With the same ° C 70 ° and the same I have: I 1.5 cm, 457 cm; cm, 871 cm; cm, 366 cm; cm, 807 cm

From the obtained results it follows that the curvature of the dependence (R) changes with a change in /.

To increase the curvature of the dependence (I), one of the arms of the two shoulders can be performed with the profile arms (concave or concave). The adjustment of the mechanism here can also be carried out by changing the value of L.

Thus, in the proposed device for assembling and forming tires of pneumatic tires of the mechanism for regulating the supply of the working medium, there are only two moving parts (a pusher and a two-arm lever), which greatly simplifies the design and thereby simplifies repair and maintenance of the device. In addition, reducing the number of parts simplifies the manufacturing process of the device and reduces the cost of the machine.

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Claims (2)

1. DEVICE FOR ASSEMBLING AND FORMING PNEUMATIC TIRE TIRE TIRES, containing drive hollow shafts mounted on the bed with axially movable flanges for fastening the elastic diaphragm of the forming drum, a drive for hollow shafts, a medium supply line to the formed elastic diaphragm installed at the mountaineer of one of the hollow shafts, and fixed on the basis of the mechanism for regulating the supply of the working medium in the form of of a pressure regulator and a pivotally mounted lever for interacting with a pressure regulator, characterized in that, in order to simplify the design of the device, the mechanism for regulating the supply of the working medium is equipped with a pusher mounted with the possibility of axial movement in the bed, mounted along the symmetry axis of the device for interaction with one of the hollow shafts, and the lever is made of two shoulders, the second shoulder of which is installed with the possibility of contact with the pusher, moreover, the pressure regulator and the lever are mounted with by regulation of their mutual position. 2. The device according to π. 1, characterized in that one of the arms of the lever for interaction with the pressure regulator is made with a profile surface. SU ,, „1234212