Abstract: The disclosure relates to a work machine, in particular a duty-cycle crawler crane, having an undercarriage which comprises a middle part and at least one crawler carrier connected to the middle part and having at least one electric traction drive, wherein at least one energy transmission line for supplying power to the traction drive and at least one further supply line runs between the traction drive and the middle part. According to the disclosure, the at least one energy supply line and the at least one further supply line run together in a separate protection means outside the middle part and the crawler carrier.

Abstract: A method and an apparatus for manufacturing uncured green tires. The apparatus includes a tire building drum with a device for creating a ply turn-up, the device including a plurality of turn-up fingers. The turn-up fingers are coupled, via sliding rings, to a drive unit located outside the tire building drum. The drive unit and the turn-up fingers are coupled to each other in such a way that they can be coupled both when the tire building drum is at a standstill and when same rotates.

Abstract: A method and a device for producing a tire blank. At least two strip-shaped materials are positioned on a tire building drum. At least two cores are set in place. The tire building drum has a core clamping element and a core fixing element. The core fixing is forcibly guided by a lever. The tire building drum includes a middle part and two drum halves arranged on both sides of the middle part so as to be positionable axially. The middle part is provided in a radial direction with a variable diameter. A radial diametral enlargement of the middle part is executed prior to the cores being set in place. The middle parts can be covered on the outside with a center sleeve of stretchable material. Furthermore, the middle parts can be contoured so that reinforcing strip pockets, which promote the production of tires with reinforced side walls, are formed.

Abstract: A method and a device for producing tires. The device is made up of, among other things, a tire-building drum including a device for realizing a ply turn-up for producing uncured tire blanks. A plurality of turn-up fingers of the ply turn-up is coupled to a drive unit arranged outside the tire-building drum. The drive takes place via synchronously driven spindles which are coupled to the tire-building drum with the help of movable carriers.