SU753729A1 - Apparatus for linear stepwise actuation - Google Patents

Description

The invention relates to devices for transporting various products with step feed into the work area (cyclic movement of 5 steps-up) and can be used in such industries as mechanical engineering, radio engineering and electronic industry in the production of radio components and to the elements of microcircuits.

A device for obtaining linear stepping movements with a stand, having a step-loop cycle controller, is known. Moreover, the cycle controller is electric and includes a non-contact sensor, a step ruler, which is installed on the carriage guides with the possibility of angular fixed movement relative to the carriage guides 1.

The disadvantage of this device is its complexity, due to the presence of an electrical unit for controlling the step size, the value of 25 is not adjustable.

The closest known solution is a device for stepping linear displacements containing a base with guides for re-jQ

the carriage of the carriage installed with the help of a nut on the lead screw, the cycle setting device and the drive 2.

The disadvantage of this device is its unreliability, due to the presence of an electronic control circuit JIe and the lack of a controller vysto.

The purpose of the present invention is to simplify the design and increase the reliability of the device.

This goal is achieved by the fact that the cycle adjuster is made of a cam screw fixed at the end with two wedge-shaped protrusions and two rollers mounted on the screw axles with the possibility of their axial movement and interaction with the cam protrusions.

FIG. 1 shows a general view of the device; in FIG. 2 - face cam (top view).

Claims (1)

The device for stepping linear displacements comprises a base 1, guides 2, a carriage 3 with a nut 4 fixed on it, a lead screw 5 connected by a splined movable joint with sleeve 6. Guides 2 are fixed in racks 7 and 8, and sleeve 6 x: In the electric drive 9, the drive is made of a fixed, free end of the lead screw 5 of the face cam 10 with two oppositely arranged upper and lower wedge-shaped protrusions 11 and 12 n of two rollers 13 mounted on screw axles .14 mounted on base 1 Bushing coupling Ana with, the electric drive 8 through the clutch 15. The device of linear stepping movements works as follows. When the electric drive 9 is turned on, the sleeve b, through the couplings 15, together with the lead screw 5, starts the rotational motion (see Fig. 1). supporting the joint, it rotates, screwing into the nut 4, progressively moves together with the end cam fixed on it 10. The direction of its translational motion depends on which direction the rotation screw 5 rotates and the movement ends c at the moment of contact of the cam wedge with a protrusion 11 with one of the riders 13 of the cycle adjuster, after which the forward movement in the opposite direction of the unlocked carriage 3 begins. The upper roller 3 works to move the carriage up and down when the drive 9 is reversed — up. Screwing or unscrewing the axis 14, on which the rollers 13 are fixed, set the cyclical nature of the operation of the carriage 3: movement-dwell. When the carriage moves, parts are transported that are mounted on the carriage, for example, in special cassettes, from one technological position to another, and during stand to process them. In one revolution of the spindle screw, the carriage moves uniformly and rapidly one step. Uniform displacement begins from the moment the flat surface of the face cam 10 contacts the roller 13, and accelerated when the wedge-shaped protrusion 11 of the face cam 9 runs onto the rock. and its technological end begins. During the long stand, the screw with pitch S, re-screwed into the nut of the fixed carriage, will move in the longitudinal direction by an amount h equal to the height of the wedge-shaped protrusion at the point of contact. it with the roller, and the roller, descending from the top of this wedge-shaped protrusion, again touches the flat surface of the face cam (the beginning of the carriage movement) through a certain angle of rotation of the screw. .and, consequently, face cam ud. The rotation angle l, expressed in terms of h and 5 will be equal to: h :, 360 | (1) At a time of one turn of a screw. The height of the carriage tg and the time of its movement will be related by the following relationship: replacement of the base with the expression - tod As follows from the above formulas (2) and (3) for given screw times and its pitch time and the carriage movement can be adjusted over wide limits by changing the value of h. The value of h can be adjusted within the limits: h i S where fb is the angle of the sector of the wedge-shaped protrusion (from the base to its top) of the face cam (see Fig. 2). At h О the movement of the carriage will be 360- / i S -360 the movement is continuous, at h the carriage will be accelerated with the maximum technological limit, i.e. in this case the roller 13 does not contact the flat surface of the face cam 10 at all, and - insight the carriage is made for the interaction of the roller, with a wedge-shaped protrusion 11. This device for stepping linear displacements has a simpler design, is reliable in operation1, ai, since it is more simple to control, eliminates the need to use an electronic unit discontinuous linear, without the introduction of additional structural links into its design, which reduces the labor costs for manufacturing the device. An apparatus for stepping linear displacements comprising a base with guides for moving a carriage mounted with a nut on the lead screw, a cycle setting device and an actuator, characterized in that, in order to simplify the design and increase reliability, the cycle setting device is made of an attached end spindle, cam with two wedge-shaped protrusions and two rollers mounted on screw axles with