Abstract: A propulsion device for a two-wheeled vehicle includes a mechanism for providing traction to a rear wheel for manual advancement of the vehicle and a first epicyclic gear reducer coupled with the mechanism and drivable by a first control device configured for varying the geometric configuration of the first epicyclic gear reducer and thus the gear ratio. A motor for assisting pedalling is interposed between the mechanism for the bottom bracket and the rear wheel and is coupled with a second epicyclic gear reducer, drivable by a second control device configured for varying the geometric configuration of the second epicyclic gear reducer and thus the corresponding gear ratio. The second epicyclic gear reducer is coupled and directly in contact with the rear wheel in order to transmit the movement from the propulsion device thereto.

Abstract: A guide device for bars to be fed to a machine tool includes first holding and guide arrangement and second holding and guide arrangement, arranged to define an advancement zone for the bars that extends according to a longitudinal axis. The first holding and guide arrangement and the second holding and guide arrangement are configured to establish one or more contact zones with the bar, so as to hold in position and guide the bar along the advancement zone. The first holding and guide arrangement and the second holding and guide arrangement extend parallel to the axis and are positioned on sides mutually opposite the longitudinal axis.

Abstract: An apparatus includes a self-centring device for centring and guiding a bar, tube or the like to be advanced to a spindle of a machine tool, includes a hollow containing body with through opening having a longitudinal axis, for receiving a bar to be fed along an advancement direction to the spindle; in the body an inner sliding surface is defined that is tilted with respect to the longitudinal axis; centring and guiding elements are provided housed in the hollow body and shaped for coming into contact with the bar and exert thereupon a distributed centring and guiding action; the centring and guiding elements that are slidable along the inner surface for the distance thereof from the longitudinal axis to adapt to different bar diameters; in the body an elastic member is housed to urge the centring and guiding elements to the position of minimal reciprocal distance so as to induce and maintain, during operation, the centring and guiding elements in contact with the surface of the bar.

Abstract: A self-centring device for supporting and guiding bars to be fed to a machine tool, including: a guide body having a through opening, supported rotatably and rotating in a controlled manner around an axis perpendicular to an advancement direction of the bars to be guided, so as to vary the angular orientation thereof around the axis; the guide body is configured to receive and maintain in position the rotating and advancing bars, a return member configured to oppose a suitable preselectable resistance to the rotation of the guide body around the axis so as to maintain a firm coupling and contact of the guide body with the advancing bar, a manual selector member configured to adjust a position and control the angular movement of the guide body. The manual selector member includes a screw arrangement cooperating with an oscillation limiting element to set an angular rest position of the guide body in function of the geometry of the bar to be received and guided to said machine tool.

Abstract: An apparatus for feeding bars to a machine tool includes a rotary drum provided with a plurality of guide units distributed circumferentially and extending parallel to a longitudinal axis, each guide unit having two parts that are reciprocally movable and openable, by a respective lever to receive a respective bar to be advanced to the machine tool. An actuator element is provided and configured to act directly on a specific lever to open the corresponding guide unit. A support assembly is provided for receiving and supporting a plurality of bars in a position adjacent to the drum. A loading unit includes a lifting device that is movable from a lower position to an upper position to pick up one or more bars from the support assembly and lift the bars to the upper position. The loading unit further includes a selector unit for selecting a single bar at a time when the lifting device is in the upper position to transfer the bar to a respective guide unit.

Abstract: Covering device suitable for an apparatus for feeding bars to a machine tool, includes: a support frame, rotatably connectable, by first hinge elements, to a frame structure of the feeding apparatus, a cover element rotatably connected, by second hinge elements, to the support frame. The first hinge elements and the second hinge elements are arranged on respective longitudinal sides, opposite one another, of the support frame and are configured to enable the covering device to be opened, at will, both from one side and the other side of the feeding apparatus. On the cover element a slit opening is obtained that extends longitudinally, configured to enable bars to move from external auxiliary storage to a drum of the feeding apparatus.

Abstract: A propulsion device for a two-wheeled vehicle , in particular for an e-bike, includes: a mechanism for the bottom bracket, provided with cranks and pedals, suitable for providing traction to a rear wheel for manual advancement of the vehicle, a first epicyclic gear reducer coupled with the mechanism for the bottom bracket, drivable by a first control device configured for varying the geometric configuration of the first epicyclic gear reducer and thus the gear ratio, a motor for assisting pedalling interposed between the mechanism for the bottom bracket and the rear wheel, coupled with a second epicyclic gear reducer, drivable by a second control device configured for varying the geometric configuration of the second epicyclic gear reducer and thus the corresponding gear ratio, the second epicyclic gear reducer being coupled and directly in contact with the rear wheel, in order to transmit the movement from the propulsion device thereto.

Abstract: Centring device for centring bars, tubes or similar to supply to a spindle of a machine tool, includes: a support base body, along which a through opening is obtained for the passage of the bar, oblong centring elements, connected rotatably to the support base body and arranged circumferentially with respect thereto to maintain the bar axially aligned on the spindle of the machine tool, an elastic element arranged for urging elastically the oblong centring elements to a radial collecting and contraction position in which they are in mutual proximity.

Abstract: An apparatus for advancing and supplying bars to a machine tool, comprises: a plurality of tubular elements each suitable for containing longitudinally a respective bar; at least one first carriage unit and a second carriage unit supporting the tubular elements and movable longitudinally on a drum structure to move the tubular elements parallel to an advancement direction for the bars; the drum structure extends from a front end, suitable for being placed in a position adjacent to a spindle of the machine tool, to a rear end, suitable for being further from the machine tool. Each tubular element is provided with a feed finger unit that is suitable for clamping and pulling a respective bar to advance the bar advancement direction.

Abstract: A device and method for recovering and unloading bar crop ends is suitable for use with a loading apparatus for supplying bars to a machine tool. The devices includes a grasping element suitable for engaging a bar-pushing unit of the loading apparatus and a bar crop-end to be taken and unloaded. A slide element receives and conveys the bar crop ends to a collecting zone. A supporting and transferring unit transfers the grasping element from an upper position, in which it is axially aligned on the advancement trajectory of the bar-pushing unit, to a lower position in which it is near the slide element. The device further includes an ejecting unit that is drivable for penetrating the grasping element in the lower position to eject the crop end and sending the crop end, by the slide element, to the collecting zone. A method is also disclosed for recovering and unloading bar crop ends from a machine tool.

Abstract: A device and method for recovering and unloading bar crop ends is suitable for use with a loading apparatus for supplying bars to a machine tool. The devices includes a grasping element suitable for engaging a bar-pushing unit of the loading apparatus and a bar crop-end to be taken and unloaded. A slide element receives and conveys the bar crop ends to a collecting zone. A supporting and transferring unit transfers the grasping element from an upper position, in which it is axially aligned on the advancement trajectory of the bar-pushing unit, to a lower position in which it is near the slide element. The device further includes an ejecting unit that is drivable for penetrating the grasping element in the lower position to eject the crop end and sending the crop end, by the slide element, to the collecting zone. A method is also disclosed for recovering and unloading bar crop ends from a machine tool.

Abstract: An apparatus for feeding bars to a machine tool including an end adjacent a working zone in which a spindle is provided; a drum element, rotatable around an axis; a movable support provided on the drum element for supporting and guiding a bar parallel to the axis. The movable support slidably drivable on the drum element parallel to the axis between a disengagement retracted configuration and an engagement extended configuration. The movable support having telescopic tube configured for being received inside tubular housing and guide for coupling with the spindle. The telescopic tube defines, a cylindrical containing structure configured for enclosing and supporting in a distributed manner a respective bar along the entire supporting zone, so as to prevent the bar from flexing because of the centrifugal actions generated by rotation.

Abstract: An apparatus for feeding bars to a lathe comprises a first end couplable with a spindle of the lathe; a stationary arrangement for guiding and supporting a bar in a first region; a drum element between a first end and an intermediate zone; a movable supporting arrangement provided on the drum element; the movable supporting arrangement is slidably drivable along the drum element parallel to the rotation axis between a contracted disengagement configuration, in which the movable supporting arrangement is collected near the first end to enable a bar to be positioned on the stationary guiding and supporting arrangement, and an extended engagement configuration, in which it is distributed between the first end and the intermediate zone to engage with the respective bar to be supported and guided.

Abstract: An apparatus for feeding bars to a lathe comprises a first end couplable with a spindle of the lathe; a stationary arrangement for guiding and supporting a bar in a first region; a drum element between a first end and an intermediate zone; a movable supporting arrangement provided on the drum element; the movable supporting arrangement is slidably drivable along the drum element parallel to the rotation axis between a contracted disengagement configuration, in which the movable supporting arrangement is collected near the first end to enable a bar to be positioned on the stationary guiding and supporting arrangement, and an extended engagement configuration, in which it is distributed between the first end and the intermediate zone to engage with the respective bar to be supported and guided.

Abstract: An apparatus for feeding bars to a machine tool including an end adjacent a working zone in which a spindle is provided; a drum element, rotatable around an axis; a movable support provided on the drum element for supporting and guiding a bar parallel to the axis. The movable support slidably drivable on the drum element parallel to the axis between a disengagement retracted configuration and an engagement extended configuration. The movable support having telescopic tube configured for being received inside tubular housing and guide for coupling with the spindle. The telescopic tube defines, a cylindrical containing structure configured for enclosing and supporting in a distributed manner a respective bar along the entire supporting zone, so as to prevent the bar from flexing because of the centrifugal actions generated by rotation.