DK154550B - VARIATOR DRIVER VARIATOR, NECESSARY IN A JIGGER - Google Patents

Description

DK 154550 B

The invention relates to variants of the kind described in the preamble of claim 1.

In known embodiments, the rotary bodies are formed by a portion of the adjustable pulley pressure rings. The radial components of the adjusting force produced by the control curve discs against the pressure rings radially push the pulley-carrier joints of the control cones.

These pulley-carrier joints are polygon slide couplings with coated hubs at the models. They are designed to be loaded in the radial direction with the maximum belt tension. Radial forces besides this affect the life span and ability of the V-belt variants to run without maintenance.

It is an object of the invention to eliminate this influence on maintenance and service life.

According to the invention, the screen is achieved by the properties specified in the characterizing part of claim 1.

It is hereby achieved that the radial components of the adjusting forces are taken up by the bearing bushes fixed in the drive housing, whereby they no longer reach the guide cone sliding coupling. This means that it must simply absorb the belt forces for which it is designed.

It will be appreciated that the radial bearing of the bearing body on the bearing bush must be capable of coping with the entire adjustment movement, that is, the rotating bodies are properly radially mounted at any axial location of the bearing bushing or the resilient pulley respectively.

The guide bushing may cooperate with a guide in the guide cone and the resilient cone in the manner specified in claim 3.

The guide bush is given better control in the axial direction by engaging the center recess of the pressure ring according to claim 4.

The movement of the steering bush on the bearing bush corresponding to the necessary steering movement for change

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DK 154550 B

2 of the rpm ratio is relatively slow. However, there is a greater difference in rpm between the adjustable pulley and the piston. the resilient pulley and the pressure ring.

For this reason, it is recommended that the bearing is carried out according to claim 5.

An example of an embodiment of a variator according to the invention is shown in the drawing. This partially shows in section an image of a variator for a jigger.

10 The drawings show only those parts which are necessary for understanding the invention.

A V-belt variant 10 comprises a driving shaft 1 with an adjustable V-belt pulley 10 'which consists of an adjustable taper 2 and a fixed taper 3.

On the driven shaft 4, which is connected to a first winding shaft not shown, is placed a fixed cone 7 and a resilient cone 5 with a spring 6, the latter parts forming a resilient pulley 10 ''. The V-belts 10 ', 10'1 are enclosed by the V-belt 20 8.

The V-belt variant 20 comprises a driving shaft 11 with an adjustable pulley 20 'comprising an adjustable guide cone 12 and a fixed cone 13 as well as a driven shaft 14 connected to a winding shaft not shown, rotating which shaft 14 has a fixed cone 17 and a resilient cone 15 with a spring 16, the latter parts forming a resilient pulley 20 ''. The V-belts 20 ', 20' 'are enclosed by the V-belt 18.

The shafts 1,4,11,14 are each housed in a bearing bushing 11,4 ', 111,141 which is fixedly mounted in a base plate 19 in the housing of the drive. The bearing bushings 11,4 ', 111,14' are all formed as pipe sections, in which a ball bearing 9 is provided at each end for bearing of a shaft 1,4,11,14. The pipe sections have a certain length which corresponds at least to the diameter of the cone washers 2,3 etc.

DK 154550 B

3

The drive shafts 1.11 are driven at the same speed. The winding shafts, which are connected to the respective driven shafts 4.14, so that they rotate at the same speed as these, must be driven with a speed number corresponding to the winding diameters which are constantly changing in the opposite direction of each other. These rpm are generated by the two V-belt variants 10, 20, which are simultaneously controlled by a common adjusting device 30.

The adjusting device 30 comprises one of a belt 26 via a pulley 23 or a similar element of a setting motor not shown, which is rotatably mounted in the drive housing 27 of the drive shaft which extends in the plane of the drive shafts 1,11, perpendicular to and between the disks 15 see, and carrying two eccentric guide discs 21,22, one at each end. These control curve discs are mutually symmetrical, but are located on shaft 27 in mutually non-mirror symmetrical positions displaced 180 ° in the rotational direction relative to each other. The guide curve disc 21,22 has at the periphery a tapered guide curve surface, the generators of which are straight or slightly curved lines forming an angle less than 90 ° with the axis of rotation. Each control curve disc 21,22 is positioned with the disc plane perpendicular to the guide shaft 27 so that the radial force components produced by the discs are parallel to the center lines of the drive shafts 1.11.

The guide curve face of the guide curve disc 21,22 acts against the coaxial cone surface 24 ', 25' of the guide shaft 24 ', 25' of the guide shaft 24 ', 25', respectively, which is slidably mounted at the end of the cone surface 24 ', 25' on the outside of the bearing sleeve 1 ', 111. so that it is guided in the radial direction and can rotate and displace axially. The guide bush has a length which is at least equal to the displacement at the setting of the guide cone 2.12, so that it can be displaced at this length on the bottom bushing of the bearing bush.

Claims (5)

A variator for a device for wrapping an article in string form, in particular band form, from one winding to another winding, especially in a jig, comprising two drive shafts pivotally mounted in housing bushings fixed with a housing and two driven shafts each DK 154550 B 5 is connected to a winding shaft so that they rotate with it, two V-belt exchanges, each driving a winding shaft and each comprising, partly an adjustable pulley 5 with a steering cone and a fixed cone, and a resilient pulley with a resilient cone and a fixed cone, and partly a V-belt running around the adjustable pulley and the resilient pulley, two steering wheel discs with tapered steering wheel surfaces 10 mounted on a fixed-bearing, rotatable steering shaft, symmetrical about its center, and each at its tapered steering curve surface acts against a rotational body axially displaceable on the associated shaft, pressing against the corresponding steering cone, characterized in that the rotating bodies ( 24, 2 '; 25, 12. are radially mounted on the bearing bushes (1 ^ 111). Variator according to claim 1, characterized in that each rotary body comprises a radially mounted guide bush 20 (24, 25) on the outer side of the bearing bush (1 ', 1 *), which rests at one end against the guide cone (2,12) and at the other end has a coaxial axis with the axis of the guide sleeve and the cone surface of the guide curve disc (21, 22) interacting with the cone surface (24 ', 25') · Variator according to claim 2, characterized in that each rotary body comprises a pressure ring (2 ·, 12 ') pivotally mounted on the guide cone (2,12) against which the guide bush (24,25) rests. Variator according to claim 3, characterized in that the guide sleeve (24,25) engages a centering recess (28) in the pressure ring (2 ^ 121). Variator according to any one of claims 2-4, characterized in that the guide bushing (24,25) is slidably mounted on the outside of the bearing bushing (ΐ ', ΐΐ') and that the pressure ring (2 ', 12') is mounted on the guide cone 35 (2.12) with a rolling bearing.