Abstract

A track belt comprises a bearing element having an inner surface, an outer surface and a width. On the inner surface, a guide element extends in the longitudinal direction of the track belt, comprising a first edge protrusion and a second edge protrusion. The width of the guide element is substantially smaller than the width of the bearing element. The track belt comprises a first guide groove having a first flank surface formed by the first edge protrusion, and a second guide groove having a first flank surface formed by the second edge protrusion. The first flank surfaces of the edge protrusions are uniform and continuous substantially over the entire length of the guide element. Preferably, the guide element comprises a traction surface parallel to the inner surface of the bearing element, having engaging members for receiving the engaging parts of the drive wheel.

IPC Classes  ?

• B62D 11/22 - Endless-track steering being effected by deflecting endless-track rollers or the like
• B62D 55/253 - Tracks of continuously-flexible type, e.g. rubber belts having elements interconnected by one or more cables or like elements
• B62M 27/02 - Propulsion devices for sledges or the like power driven

Abstract

A transmission system for a vehicle comprises a primary shaft (10), a first planetary gear train (22a) and a second planetary gear train. The planetary gear trains comprise a ring gear (12), a carrier (14) for supporting planet gears (26), a first drive shaft mounted on the carrier of the first planetary gear train, a second drive shaft mounted on the carrier of the second planetary gear train, as well as secondary transmission devices for changing the rotation speeds of the ring gears of the first and second planetary gear trains. The secondary transmission devices comprise first control devices for changing the rotation speed of the ring gear of the first planetary gear train, and second control devices for changing the rotation speed of the ring gear of the second planetary gear train, the first and second control devices being independent of each other. Preferably, the ring gears are equipped with an external toothing (34), and said first and second control devices comprise a self- locking worm (20) arranged to engage the external toothing, and a control motor (18) for spinning the worm. In the method, the rotation speeds of the drive shafts of the vehicle are changed by adjusting the rotation speeds of the ring gears by secondary transmission devices independently from each other.

IPC Classes  ?

• B62D 11/12 - Steering non-deflectable wheelsSteering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin- differential or epicyclic gears using separate change-speed gearings
• B62D 11/16 - Steering non-deflectable wheelsSteering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin- differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied mechanically
• B60K 17/04 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing

Abstract

A track belt comprises a bearing element (10) having an inner surface (12), an outer surface (14) and a width. On the inner surface, a guide element (16) extends in the longitudinal direction of the track belt, comprising a first edge protrusion (20a) and a second edge protrusion (20b). The width of the guide element is substantially smaller than the width of the bearing element. The track belt comprises a first guide groove (18a) having a first flank surface (22a) formed by the first edge protrusion, and a second guide groove (18b) having a first flank surface formed by the second edge protrusion. The first flank surfaces of the edge protrusions are uniform and continuous substantially over the entire length of the guide element. Preferably, the guide element comprises a traction surface (24) parallel to the inner surface of the bearing element, having engaging members (25) for receiving the engaging parts of the drive wheel.

IPC Classes  ?

• B62D 11/22 - Endless-track steering being effected by deflecting endless-track rollers or the like
• B62D 55/07 - Mono-track vehicles
• B62D 55/24 - Tracks of continuously-flexible type, e.g. rubber belts
• B62M 27/02 - Propulsion devices for sledges or the like power driven
• B65G 15/02 - Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration for conveying in a circular arc
• B65G 15/46 - Belts or like endless load-carriers made of rubber or plastics formed with guides