CS219656B1 - Freewheel rotary control, e.g. motion bolts of cutting machines - Google Patents

Abstract

The subject of the invention structurally solves the connection of the control wheel with the shaft of the moving screw with a secured fixed connection in the case of manual drive and a free-running connection in the case of machine drive of the moving screw. The fixed connection is achieved by manually rotating the wheel, when the rollers are pressed by a locking element to the housing and transmit the rotational movement to the shaft of the moving screw by friction. With machine control, the rollers are free, the connection of the wheel and the shaft of the moving screw is free-running. The mechanism is usable for controlling the movement of supports of machine tools and various measuring equipment.

Description

SUMMARY OF THE INVENTION The object of the invention is to provide a connection of a control wheel with a movement screw shaft with a fixed connection in the hand drive and a freewheel connection in the machine drive of the motion screw. The fixed connection is achieved by manually turning the wheel, whereby the rollers are pressed by the locking element to the housing and transfer the rotational movement to the movement screw shaft by friction. The machine controls make the rollers loose, the wheel and shaft of the motion screw being idle. The mechanism can be used to control the movement of machine tool supports and various measuring equipment. 219656 - The object of the invention is to solve the connection of the rotary actuating mechanism with the freewheel while guaranteeing the idle of the control wheel by switching on the drive screw of the movement bolts and the ability to instantly reach a fixed connection with the shaft when manually actuating the movement bolts. The invention is intended for both rotary and motion screw actuation, particularly for machine tools.

The known structure is designed so that the j-wheel is to the motion screw shaft; fastened through a claw clutch which, when pushed:; the castors in the axial direction slide into the working and position. After the manual movement of the movement and screw is completed, the spring pushes the claw coupling out of the working and position and the wheel remains idle. Disadvantage! ; this solution is that when retracting, the position in which the clutch teeth engage in the engagement must be pivoted and thus the mechanism becomes unsteady, which is also disadvantageous for the lathe. ί

Another solution is a mechanism in which the wheel is non-rotatably connected to the shaft by a tongue. The machine drive rotates the screw together with the control wheel, which does not comply with the occupational safety regulations.

The above-mentioned drawbacks are overcome by the invention of a free-wheel mechanism consisting of a locking device for connecting the shaft with a split ring, further from a wheel with a handle mounted rotatably on a shaft by a rolling bearing, a driving element, and a locking element, the essence of which is that locking element firmly attached to control | ; the wheel has holes in the tops of the radial arms and holes for balls inserted in the radial hollows! a portion of the entrainment element, wherein the entrainment element; it has pairs of exals in its tops; protrusions in which they are radially slidable | intermediate rollers, placed between the locking mechanism and the backing. | The advantage of this solution of the rotary mechanism; The freewheeling of the control wheel with the shaft when the machine screw of the motion screw is engaged, and the manual engagement of the motion screw instantly establishes a firm connection, without any additional operations. A new solution is to increase work safety and increase the readiness of the mechanism to fulfill its function.

Fig. 1 is a schematic view of a longitudinal view;

Claims (2)

OBJECT 1. A rotary control device with a wobble, for example, machine screws, consisting of a locking device for engaging a shaft with a split ring, a wheel with a handle, mounted rotatably on a shaft with a roller bearing, a driving element, a locking element, characterized in that the locking element (10) fixedly connected to the actuating wheel (3) has radial shoulder arms (27): holes (14) for the balls (11) housed in the recesses 219656 of the rotary control mechanism with vofnobehom in front plane. FIG. Fig. 2 shows a cross-section of the mechanism indicated in direction A-A in Fig. 1. The locking element 10, mounted on the drum 5, by a sliding bearing 8, is provided with openings 14 with a groove 16 provided for the radial part arms 27 at the tops. the locking element 11 has a pair of axial protrusions 25 in the apexes 24 of the radial portion, between which radially movable intermediate rollers 13 are in contact with the chamfer 15! the securing element 10 and not touching the housing 6 pressed on the drum 5 by means of a tongue 23 is secured against a self-unlocking rotation by a locking device mounted in the bore 20 in the direction of the axial axis of the shaft 2 which is actuated by the button 17. In operation, by manually actuating the movement screw by turning and simultaneously pushing the wheel 3 axially, the driving element 9 is pressed against the surface of the drum 18 and the surface of the locking element 19, whereby the locking element 10 is braked, the locking ball 11 comes out of the trough 16 and the two elements 9, 10 rotate relative to one another. Thereby, a shank is defined between the locking element 10 and the sleeve 6 and the rotary movement from the wheel 3 is transmitted by the rollers 13 and the sleeve 6 in the drum 5 to the shaft 2.! The mechanism operates as a freewheel clutch. Upon release of the handle 7, the control wheel 3 is in the swivel, the shaft 2, the drum 5 with the split ring 4 and the sleeve 6 rotating. The rollers 13 are in the middle and the position between the axial protrusions 25 of the driving element 9 touching the chamfer 15 of the locking element 10 In this position, the flare is between the rollers 13 and the groove 6 which allows (the drum 5 to rotate freely. The locating position of the two elements 9, 10 is secured by locking balls 11 in the troughs 16 of the locking element 10 pressed by the springs 12. The mechanism can be used on machines and devices on which the lengths or positions are adjusted by means of rotary motion, (26) a radial portion of the entrainment element (9), wherein the entrainment element (9) is provided with pairs of axial projections (26) in its apexes (24), between which radially movable intermediate rollers (13) are arranged between the locking element (10) and the sleeve (6). A rotary control device according to claim 1, characterized in that the tops of the securing element arms (27) and the tops of the entrainment element (24) are rotated by 60 ° -90 ° with respect to each other. 2 2/9 Fig. 1 2/9 FIG. and