Double-nut distance-adjusting device for extrusion tablet machine

Abstract

The invention discloses a double-nut distance-adjusting device for an extrusion tablet machine. The double-nut distance-adjusting device comprises a screw rod (10), a shell body pressing cover (11) and a shell body (12); a closed cavity is formed by the shell pressing cover (11) and the shell body (12), the shell body (12) is internally equipped with a worm gear and worm mechanism, the shell body (12) is fixedly connected with a rack, and the screw rod (10) is fixedly connected with a roller bearing. The double-nut distance-adjusting device also comprises distance-adjusting nuts (7) and distance-adjusting pads (8), a worm gear nut (1) of the worm gear and worm mechanism is in threaded connection with the screw rod (10), the distance-adjusting nuts (7) and the distance-adjusting pads (8) are connected with the worm gear nut (1) through first screws (9), the distance-adjusting nuts (7) are in threaded connection with the screw rod (10), the screw rod (10) is fixedly connected with the rack, and the worm gear nut (1) drives the distance-adjusting nuts (7) to together rotate around the screw rod (10) so as to allow the screw rod (10) to move up and down. The double-nut distance-adjusting device has high distance-adjusting precision and low adjustment costs, and can adjust the distance under load.

Description

technical field [0001] The invention relates to a distance adjusting device of an extrusion tablet press, in particular to a distance adjusting device with two nuts. Background technique [0002] Extrusion tablet press is a commonly used equipment for the production of rubber products. The products of extrusion tablet press have many different thickness requirements. Therefore, when the extrusion tablet press is working, the distance between the two tablet rollers often needs to be adjusted. adjust, such as figure 1 As shown, the distance adjusting device of the traditional extrusion tablet press has only one nut, and the nut is fixedly connected with the frame, and the screw is driven to rotate by the worm gear mechanism (the worm gear and the screw are locked and connected), and rotates up and down along the internal thread of the fixed nut. The distance is adjusted by moving. The screw of the traditional distance adjustment device rotates and moves up and down. After lon...

AI Technical Summary

Problems solved by technology

[0002] Extrusion tablet press is a commonly used equipment for the production of rubber products. The products of extrusion tablet press have many different thickness requirements. Therefore, when the extrusion tablet press is working, the distance between the two tablet rollers often needs to be adjusted. adjust, such as figure 1 As shown, the distance adjusting device of the traditional extrusion tablet press has only one nut, and the nut is fixedly connected with the frame, and the screw is driven to rotate by the worm gear mechanism (the worm gear and the screw are locked and connected), and rotates up and down along the internal thread of the fixed nut. The distance is adjusted by moving. The screw of the traditional distance adjustment device rotates and moves up and down. After long-term repeated operation, the head of the screw will wear the contact parts, which will affect the distance adjustment accuracy, especially when the distance is adjusted under load. Therefore, The traditional distance adjustment device can only stop and adjust the distance. When the distance adjustment device runs repeatedly, the gap between the lead screw and the nut will gradually increase. As the gap between the nut and the lead screw gradually increases, when the lead screw When the two directions are reversed, the axial movement of the screw pair of the nut and the lead screw will increase accordingly, which will reduce the accuracy of the distance adjustment of the roller, and even cause vibration, and the increased gap It is difficult to restore, and usually only by replacing the nut and the lead screw can the gap be reduced, and the cost increases a lot

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