A machine tool screw pre-tensioning installation mechanism

Abstract

The invention relates to a screw rod pre-stretching installation mechanism for a machine tool, which includes a screw rod and a mounting seat with a mounting hole. It is connected with a lock nut that can pre-stretch the screw rod; it also includes a first sealing mechanism, including a fixed ring fixed to the rear side of the screw rod installation end, and the outer wall of the fixed ring is The arc shape is narrow at the front and wide at the rear, and the first sealing gasket is installed between the outer wall of the fixed ring sleeve and the mounting hole of the mounting seat; the second sealing mechanism includes a movable ring sleeve fixedly sleeved on the rear side of the lock nut , the outer wall of the movable ring is in the shape of an arc with a narrow front and a wide rear, and a second sealing gasket is installed between the outer wall of the movable ring and the installation hole of the mounting seat. The invention can effectively and greatly improve the sealing effect at the front and rear ends of the mounting seat without affecting the normal pre-stretching installation.

Description

technical field [0001] The invention relates to a pre-stretching installation mechanism of a screw rod of a machine tool, which is mainly used for pre-stretching installation of the screw rod of a machine tool. Background technique [0002] In the feed transmission system of the machine tool, the screw rod is often used as the transmission element to convert the rotary motion of the servo motor into the linear movement of the motion actuator (knife holder or workbench, etc.), and the screw rod is mainly pre-stretched by the screw rod The mounting device is turned and mounted in a pre-tensioned state. [0003] The existing machine tool screw pretensioning installation mechanism has the following defects in actual use: [0004] 1) The oil seals located at the front and rear ends of the mounting seat are in line contact with the mounting end of the screw for sealing. Since the screw rotates frequently during the machining process of the machine tool, the wear of the oil seal b...

AI Technical Summary

Problems solved by technology

[0004] 1) The oil seals located at the front and rear ends of the mounting seat are in line contact with the mounting end of the screw for sealing. Since the screw rotates frequently during the machining process of the machine tool, the wear of the oil seal by the screw is relatively large, resulting in The seal between the oil seal and the screw rod is prone to gaps, which will lead to leakage of lubricating oil, and may cause external coolant or chips to enter the mounting seat, which will damage the installation stability of the screw rod, resulting in the failure of each component. The service life cannot meet the design requirements;

[0005] 2) The anti-collision buffer block installed on the rear end surface of the mounting seat is mainly made of rubber block with cushioning effect. Although it has a certain buffering effect, its energy dissipation effect is poor. Once an impact occurs, the damage of the mounting seat is extremely difficult. be effectively controlled

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