SU1402743A1 - Spatial cam mechanism - Google Patents

Abstract

This invention relates to mechanisms for converting rotary motion into cyclic helical. The purpose of the invention is to expand the kinematic capabilities of the mechanism. The mechanism includes a housing 1 in which a cam 2 with an end profile surface is installed, which has the ability to rotate about the axis of the drive shaft 6 in the process of adjusting the amplitude of the axial oscillatory movement of the driven link 8. The cam 2 interacts during work with the cam 3 also having an end profile surface, through the rolling bodies 4, which are placed on the pusher 5, through a translational kinematic pair connected with the drive shaft 6. The slave link 8 interacts with the cam 3 through the conductor u ki 10, mounted on the splined drive shaft 7 and spring-loaded in the direction of the axis of the shaft by a spring 9. Rotation of the cam 2 is effected by means of the screw 12 mounted in the housing 1 I. yl. I with

Description

The invention relates to general engineering, in particular to mechanisms for converting rotary motion into cyclic helical.

The aim of the invention is to expand the kinematic capabilities of the mechanism by adjusting the amplitude of the axial movement.

The drawing shows the proposed mechanism.

The mechanism includes a housing 1, in which a cylindrical cam 2 with an end profile surface is pivotally mounted and fixed. Coaxially cam 2 is located cylindrical cam 3 also with an end profile surface. Between cams 2 and 3, the rolling bodies 4 are spaced, which are fixed on the pusher 5. The pusher 5 is connected to the drive shaft 6 by means of a translational kinematic pair (not designated in the drawing). On the slots 7 of the drive shaft 6, the driven link 8 is installed, which is spring-loaded through spring 9 in the direction of the axis of the drive shaft 6 and contacts the cam 3 via balls 10. The worm gear 11 is cut on the outer cylindrical surface of the cam 2 meshes with the adjusting screw 12 installed in housing 1.

During the operation of the mechanism, the rotation of the driving shaft 6 is transmitted to the pusher 5, which through the rolling bodies 4 fixed on it, interacts with the end

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five

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profile surfaces cams 2 and 3. When interacting with cam 2, the pusher 5 receives axial oscillatory movement with amplitude A |, and when interacting with cam 3, the pusher 5 transmits to it, and therefore to the driven link 8, axial oscillatory movement with amplitude A2. When the protrusions of the profile surfaces of the cams 2 and 3 coincide, the amplitudes AI and A2 are folded, and if the projections of the profile surface of the cam 2 coincide with the depressions of the profile surface of the cam 3 or vice versa, the amplitudes A | and A2 are deducted.

Adjusting the amplitude of the axial oscillations. The movement of the slave link 8 during the operation of the mechanism is carried out by rotating the screw 12, which through the tooth 11 transfers the rotation to the cam 2.

Claims (1)

Invention Formula A spatial cam mechanism, comprising a housing, a drive shaft, two cylindrical coaxial cams with face profiles, interposed rolling bodies and a driven link, characterized in that, in order to expand the kinematic possibilities, it is provided with a pusher connected to the drive shaft by progressive kinematic pair, the body of the body is placed on the pusher, and one of the cams is placed in the housing with the possibility of rotation relative to the other and fixation.