SU823096A1

SU823096A1 - Small-displacement drive

Info

Publication number: SU823096A1
Application number: SU792799478A
Authority: SU
Inventors: Петр Александрович Ратомский
Original assignee: Ордена Трудового Красного Знаменивильнюсский Станкостроительный Завод"Жальгирис"
Priority date: 1979-07-13
Filing date: 1979-07-13
Publication date: 1981-04-23

Description

(54) ПРИВОД МАЛЫХ ПЕРЕМЕЩЕНИЙ(54) DRIVE OF SMALL MOVEMENTS

II

Изобретение относитс к станостроению и может быть применено в металлорежущих и других станках дл осуществлени малых перемещений подвижных узлов.The invention relates to machine-building and can be applied in metal-cutting and other machines for making small movements of moving parts.

Известен привод малых перемещений, состо щий из рессоры, расположенной между подвижным и неподвижным узлами станка 1.A known drive of small displacements, consisting of a spring located between the movable and stationary nodes of the machine 1.

Однако така конструкци привода, малых перемещений, в которой содержитс только один упругий элемент, помещенный между неподвижными и подвижным узлами предполагает использование гидравлического привода, что снижает точность и плавность перемещений в результате непосто нного давлени в гидросистеме.However, such a drive design, small movements, in which there is only one elastic element placed between the fixed and moving parts, involves the use of a hydraulic drive, which reduces the accuracy and smoothness of movements as a result of unstable pressure in the hydraulic system.

Цель изобретени - повышение плавности перемещений.The purpose of the invention is to increase the smoothness of movement.

Указанна цель достигаетл тем, что привод снабжен ходовой гайкой, двум эксцентричными валами, расположенными в проточке неподвижного узла, и втулкой, установленной в рессоре, выполненной в виде двух лепестков, переход щих во фланцевую часть со стороны неподвижного узла станка; и резьбовое кольцо - со стороны подвижното узла, при этом ходова гайка сопр жена с резьбовым кольцом рессоры, а эксцентриковые валы установлены с возможностью взаимодействи со втулкой через лепестки рессоры.This goal was achieved by the fact that the drive is equipped with a running nut, two eccentric shafts located in the recess of the fixed unit, and a sleeve installed in the spring, made in the form of two petals, passing into the flange part on the side of the fixed unit of the machine; and the threaded ring is from the side of the movable unit, while the running nut is coupled to the threaded spring ring, and the eccentric shafts are installed with the possibility of interaction with the sleeve through the spring leaves.

На фиг. 1 изображен привод, общий вид;FIG. 1 shows the drive, general view;

на фиг. 2 - разрез А-А на фиг. 1; на фиг. 3 - разрез Б-Б на фиг. 1.in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

Claims

In case 1 a spring 2 is installed, made of two petals 3 and 4, transferring from the side of case 1 to a single flange part 5, crepe Shuyus thereto with screws 6 and 7, and from the side of the running nut 8 - into the threaded ring 9. Running nut made with threaded shoulders 10, tying it to the threaded ring 9, and has slots on the outer surface. The slotted sleeve 11 serves to guide the movement of the spindle nut, is installed in the machine body and is made split with the possibility of clamping the spindle nut in it using a pair of screw-nut 12 connected through a pinion 13-16 with an electric motor 17. The sleeve 18 is installed inside the spring, serves for its support and installed with a gap relative to the lead screw 19 of the machine. In the housing grooves 20, eccentric shafts 21 and 22 are connected via gears 23-26 to an electric motor 27. Bearings 28 and 29 are in contact with the petals 3 and 4 on the eccentric shafts. The drive operates as follows. To move the console 30 (movable assembly) upwardly, rotation from the electric motor 17 is transmitted clockwise through the gears 13-16 to the screw-nut pair 12, releasing the running nut from the clamping forces from the splined hub 11. Then from the electric motor 27 through the gears 23- 26 feeds eccentric shafts 21 and 22, which, through bearings 28 and 29, simultaneously deform petals 3 and 4. Petals, deformed, are pressed against sleeve 18 and displace the running nut in the splined sleeve 11, as well as the driving screw connected to the running nut and with tvetstvenno moving unit (console). After the movement is completed, the electric motor 27 is de-energized, and the electric motor 17 is supplied with a reverse sign voltage, then when the screw-nut pair is rotated counterclockwise, the slot nut bushing 11 is clamped with the lead nut, after which cutting is possible. To move the movable assembly (cantilever) downward, the operation is performed in the same sequence, with the voltage applied to the electric motors with the opposite sign. Performing a small displacement drive in the form of a spring consisting of two petals, placed between the sleeve and the spurs of the eccentric shafts with the possibility of their simultaneous deformation, makes it possible to increase the smoothness of movement of the movable assembly at small displacements in machine tools. Claims of the Invention A small displacement actuator consisting of a spring located between the movable and stationary units of the machine, characterized in that, in order to increase the smoothness of displacements, the actuator is equipped with a running nut, two eccentric shafts located in the bore of the fixed unit, and a bushing installed in the spring, made in the form of two petals, passing into the flange part from the side of the stationary unit of the machine, and the threaded ring - from the side of the movable unit, while the running nut is aligned with the threaded ring re sors, and the eccentric shafts are mounted for engagement with the sleeve through a spring pitch. Sources of information taken into account in the examination 1. Pusch V.E. Small movements in machine tools. M., Maschgiz, 1961, p. 116.

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