Machine tool lead screw pre-stretching installation mechanism

Abstract

The invention relates to a machine tool lead screw pre-stretching installation mechanism. The machine tool lead screw pre-stretching installation mechanism comprises a lead screw and an installation base with an installation hole, wherein the installation end of the lead screw is rotationally installed in the installation hole, the front end of the lead screw is connected to a locking nut capable of pre-stretching the lead screw in a threaded connection mode, the machine tool lead screw pre-stretching installation mechanism further comprises a first sealing mechanism and a second sealing mechanism, wherein the first sealing mechanism comprises a fixing ring sleeve fixedly connected to the rear side of the installing end of the lead screw, the outer side wall of the fixing ring sleeve is in an arc shape with the front portion narrow and the rear portion wide, a first sealing gasket is arranged between the outer side wall of the fixing ring sleeve and the installing hole of the installing base, the second sealing mechanism comprises a movable ring sleeve fixedly connected to the rear side of the locking nut in a sleeve mode, the outer side wall of the movable ring sleeve is in an arc shape with the front portion narrow and the rear portion wide, and a second sealing gasket is arranged between the outer side wall of the movable ring sleeve and the installing hole of the installing base. According to the machine tool lead screw pre-stretching installation mechanism, on the basis that normal prestretching installation does not affect, the sealing effect of the front end and the rear end of the installation base can be effectively and greatly improved.

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...

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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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