SU1763080A1 - Pivotable table - Google Patents

Abstract

Essence: the device contains a support column, a housing 6 with bearings 3, a platform with brackets 7 fixed on the housing, a platform clamp 4, a platform turning mechanism consisting of a Maltese cross 10 fixed on the housing, a leash 12, a slide 15 moving along The rolling pins 16 of the bed, the pushing cylinder (TC), the rod of which is connected to the slider, and the pneumo-mortizer installed coaxially with the TC, the drive drive is fixed on the slide, and the longitudinal axes of the drive drive and TC are perpendicular to each other. 1 z p f-ly. 4 il.

Description

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The invention relates to mechanical engineering, namely to rotary tables of the carousel type used in automatic lines in the manufacture of casting molds, and can be used to communicate to the executive bodies of machines of intermittent rotary motion in one direction when using a drive with a reciprocating motion.

Known rotary table, mainly for carousel molding machine, containing a support column mounted on a bed, a housing with its bearings inside and a vertical axis of rotation of the supporting column, a platform with brackets fixed on the housing, a platform clamp with a piston drive and a rotation mechanism of the platform 1. Auth. St. No. 528993, cl. B 22 C 11/04, 1976.

A disadvantage of the known rotary table is the complexity of the design due to the implementation of the platform turning mechanism in the form of gears embedded in the piston drive and the presence of upper and lower inner and outer grooves with grooves, which reduces reliability, and due to the placement of the turn mechanism inside the support column, the repair conditions deteriorate and service. In addition, fixing the platform relative to the support column is close to the center of the support column, which increases the arc of the angular displacement of the edge of the turntable and, with large table dimensions, reduces the accuracy and rigidity of the fixation and, as a result, reduces the quality of the casting.

The purpose of the invention is to simplify the design, increase reliability and improve the conditions of repair and maintenance.

This goal is achieved by the fact that in a rotary table, mainly for a rotary molding machine containing a supporting column mounted on a bed, a housing with bearings placed inside it and a vertical axis of rotation of the supporting column, a platform with brackets fixed to the housing, a platform clamp with a piston drive and a platform turning mechanism, the latter consisting of: a Maltese cross fixed on the body, a leash mounted rotatably on the end of the piston actuator rod, a slider, laid with the ability to move along the guide rolling pins mounted on the frame, the pushing cylinder placed on the frame with the ability

a roller whose stem is connected to a slider and a pneumatic shock absorber mounted coaxially with the pushing cylinder with the ability to interact with the slider,

at the same time, the drive of the driver is fixed on the slide, and the longitudinal axes of the driver of the driver and the pushing cylinder are perpendicular to each other.

In addition, in order to reduce metal consumption and improve the quality of the form, the platform brackets are U-shaped with shelves facing the periphery, with the slots for the clamp located on the side shelves of the brackets.

FIG. 1 shows a turntable, a general view; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 is a view along arrow B in FIG. 1; in fig. 4 is a schematic representation of the principle of operation (rotation of the Maltese cross) of the proposed device.

The rotary table contains a support column 1 mounted on the frame of the machine (machine), platform 2 mounted on

a support column 1 on bearings 3, a clamp 4 with a piston drive 5, a housing 6 on which a platform 2 is fixed with brackets 7 for accommodating the flasks 8 and with slots 9 for a clamp 4 of platform 2, and

the platform rotation mechanism, which consists of: a driving disk 10 with grooves 11 (Maltese cross) mounted on the housing 6, a lead 12 rotatably mounted, for example, on bearings (not shown), on the end of the rod 13 of the piston drive 14, the slide 15 located with the ability to move along the guide rolling pins 16, mounted on the frame, pushing the cylinder 17,

placed on the bed with the possibility of rolling, in the back cover 18 of which is placed the braking device 19, and the pneumo-shock absorber 20, installed coaxially with the pushing cylinder 17 with the possibility

the interaction of its rod 21 with the slide 15. At the same time, the piston drive 14 of the driver 12 is fixed on the slide 15, the longitudinal axes 22 and 23, respectively, of the piston drive 14 with the piston cavity 24 and the pushing cylinder 17 with the piston cavity 25 are perpendicular to each other, and the stem 26 of the pushing the cylinder 17 is connected to the slider 15. The brackets 7 can be made U-shaped with shelves,

directed periphery, with the sockets 9 for the latch 4 are located on the side shelves of the brackets 7.

The device works as follows.

When pressure is applied to the piston cavity 24 (see Fig. 2) of the piston drive 14, the rod 13 is lowered, while the lead 12 enters the groove 11 of the Maltese cross 10. At the same time, under the action of the piston drive 5, the lock 4 leaves the slot 9 of the platform bracket 7 2, freeing platform 2 to rotate. Further, when pressure is applied to the piston cavity

25 (see Fig. 4, a) of the pushing cylinder 17; the rod 26 moves forward (to the left in the drawing). When this is connected to the rod

The crawler 15 with the driver 14 fixed on it 14 also moves forward along guide pins 16 and due to the connection of the lead 12 with the groove 11 of the Maltese cross 10, turns the latter (Maltese cross 10), and with it the platform 2 turns 90 clockwise arrow, together with her rotational motion. In the process of turning the platform 2, the leash 12 performs a complex movement: the straight horizontal along with the slider 15 and the groove 11 of the Maltese cross 10 radially along the guides from the periphery to the center (see Fig. 4.6), which corresponds to the maximum speed of rotation of the platform and further from the center to the periphery (see Fig. 4, c). At the same time, after reaching platform 2, and therefore the Maltese cross 10, of maximum speed (see Fig. 4.6), the slide 15 begins to interact with the rod 21 of the shock absorber 20, which, moving (retracting) with resistance into its cylinder, dampens the speed of the mechanism . Moreover, by making platform 2 with U-shaped brackets 7 with shelves directed toward the periphery, the platform mass is concentrated towards the center and the platform inertia decreases, which favorably affects the platform braking when it is rotated. After the turn of the platform 2 and, accordingly, the Maltese cross 10 (see Fig. 4, c), the latch 4 under the action of the piston actuator 5 rises and enters the slot 9, fixing the position of the platform 2 relative to the support column 1. Simultaneously with the fixation of the platform 2, pressure is applied into the rod cavity of the piston actuator 14 of the driver 12, as a result, the rod 13 rises, the driver 12 emerges from the groove 11 of the Maltese cross 10, and the actuator 14 of the driver 12 disengages, and hence the slider 15, with the Maltese cross 10. When pressure is applied The rod 26 together with the slide 15 and the piston actuator 14 of the driver 12 returns to the rod cavity 27 of the pushing cylinder 17

back (right on the drawing) to its original position. At the same time, the idling speed of the slide 15 is extinguished by the brake device 19 integrated in the cover 18 of the pushing

the cylinder 17, and the rod 21 of the air damper 20, freed from the action of the slider 15, freely moves (extends) to the right, occupying the initial position. Then the cycle is repeated.

The use of the proposed rotary table in comparison with the known one provides a simplified design, increased reliability and improved repair and maintenance conditions by simplifying

the mechanism of rotation of the platform by transmitting the rotation of the Maltese cross, rigidly connected with the platform, from the drive with reciprocating motion in the form of two interconnected

cylinders and the presence of a shock absorber for damping the speed of rotation of the platform.

Claims (2)

1. Turntable mainly for the carousel molding machine, containing a support column mounted on the frame, a housing with bearings placed inside it and a vertical the axis of rotation of the support column, a platform with brackets fixed to the housing, a platform retainer with a piston drive and a platform rotation mechanism, characterized in that simplify the design, increase the reliability and improve the conditions of repair and maintenance; the platform's rotation mechanism consists of a Maltese cross, which is rotatably mounted on the end of the piston actuator stem, a slider disposed with a possibility of movement along guide pins, mounted on a frame, a pushing cylinder placed on a frame with the possibility the roller, whose rod is connected to the slide, and a pneumatic shock absorber mounted coaxially with the pushing cylinder with the ability to interact with the slide, while the driver drive is fixed on the slide, and the longitudinal axes of the driver drive and the pushing cylinder are perpendicular to each other. 2. Table pop. 1, characterized in that, in order to reduce metal consumption and improving the quality of the form; the brackets are U-shaped with shelves directed toward the periphery, with the sockets of the latch located on the side shelves of the brackets. fig.Z S ABOUT) 20 y fa.4