A track chain member includes a shoe member, and a first rail member extending from the shoe member. The first rail member includes a first lug defining a first bore defining a first longitudinal axis and including a first bushing retention shelf disposed in the first bore, as well as a second lug including a second bushing retention shelf disposed in the second bore. A third lug extends in a direction opposite that of the first lug and second lug and is disposed axially between the first lug and the second lug.

A track chain member includes a shoe member, and a first rail member extending from the shoe member. The first rail member includes a first lug defining a first bore defining a first longitudinal axis and including a first bushing retention shelf disposed in the first bore, a second lug including a second bushing retention shelf disposed in the second bore. A third lug extends in a direction opposite that of the first lug and second lug and is disposed axially between the first lug and the second lug.

A track chain member includes a shoe member, and a first rail member extending from the shoe member. The first rail member includes a first lug defining a first bore defining a first longitudinal axis and including a first bushing retention shelf disposed in the first bore, a second lug including a second bushing retention shelf disposed in the second bore. A third lug extends in a direction opposite that of the first lug and second lug and is disposed axially between the first lug and the second lug.

A work machine includes an undercarriage assembly. The undercarriage assembly includes a chassis and a ground-engaging mechanism for rotating around the chassis to move the work machine. A pair of rails is coupled to the chassis. A pair of sliders is coupled to a front-assembly. The sliders are aligned with the rails and movable relative to the rails to facilitate movement of the front-end assembly relative to the chassis.

A work machine includes an undercarriage assembly. The undercarriage assembly includes a chassis and a ground-engaging mechanism for rotating around the chassis to move the work machine. A pair of rails is coupled to the chassis. A pair of sliders is coupled to a front-assembly. The sliders are aligned with the rails and movable relative to the rails to facilitate movement of the front-end assembly relative to the chassis.

A track assembly for a terrain going vehicles having tires, the track assembly having at least two traction bars. The traction bars each having a body that is dimensioned to extend over the width of a tire and guide plates extending from the body so that they can be set to reach over the edge of the tire and to the sides of the tires and ears at each end of each traction bar, extending crosswise on relation to the length of the traction bar and on both sides of the body of the traction bar, the ears having each at least one hole. There is at least one link having a link body with a length and one connecting hole at each opposite end of the link body, and pins set to run through a pair of one hole of the link body and at least one hole of a ear of the traction bar in order to form a chain, wherein the pins are locked in relation to the holes of the ears so that rotation of the pins in the holes is prevented.

A track assembly for a terrain going vehicles having tires, the track assembly having at least two traction bars. The traction bars each having a body that is dimensioned to extend over the width of a tire and guide plates extending from the body so that they can be set to reach over the edge of the tire and to the sides of the tires and ears at each end of each traction bar, extending crosswise on relation to the length of the traction bar and on both sides of the body of the traction bar, the ears having each at least one hole. There is at least one link having a link body with a length and one connecting hole at each opposite end of the link body, and pins set to run through a pair of one hole of the link body and at least one hole of a ear of the traction bar in order to form a chain, wherein the pins are locked in relation to the holes of the ears so that rotation of the pins in the holes is prevented.

Current invention corresponds to a mobility vehicle that draws its properties from a special kind of a track that can change its rigidity. The track can become rigid on its lower part corresponding to a wheel shape with large diameter or become totally flexible as usual track on upper side for practical use. When rigid, the track correspond to circular wheel and thus plays a role of a wheel in contact with the ground. The upper part of the track remains flexible and allows to use space above a the track for practical reasons. More particularly, the invention relates to a mobile system including variable flexibility track and at least two rollers around which the variable flexibility track is wrapped, wherein the rollers are adapted to change the rigidity and the curvature of the track to adapt its shape to different functionalities as being a wheel or having a part of circular wheel with different curvature or being foldable. The variable flexibility track is composed of track elements and hinges linking the track elements so as to allow rotation of the track elements with respect to each other around the hinges. Each track element bears a locking mechanism that allows a rigid positioning of the track elements with respect to the adjacent ones at various angles. The rollers are in contact with the variable flexibility track and can contain mechanisms to lock a track elements thus changing track rigidity and/or mechanisms to change track curvature. The tracks also play a role of shock absorbers and bear mechanisms to perform turning of the vehicle by applying different speed and/or curvature to the tracks.

Current invention corresponds to a mobility vehicle that draws its properties from a special kind of a track that can change its rigidity. The track can become rigid on its lower part corresponding to a wheel shape with large diameter or become totally flexible as usual track on upper side for practical use. When rigid, the track correspond to circular wheel and thus plays a role of a wheel in contact with the ground. The upper part of the track remains flexible and allows to use space above a the track for practical reasons. More particularly, the invention relates to a mobile system including variable flexibility track and at least two rollers around which the variable flexibility track is wrapped, wherein the rollers are adapted to change the rigidity and the curvature of the track to adapt its shape to different functionalities as being a wheel or having a part of circular wheel with different curvature or being foldable. The variable flexibility track is composed of track elements and hinges linking the track elements so as to allow rotation of the track elements with respect to each other around the hinges. Each track element bears a locking mechanism that allows a rigid positioning of the track elements with respect to the adjacent ones at various angles. The rollers are in contact with the variable flexibility track and can contain mechanisms to lock a track elements thus changing track rigidity and/or mechanisms to change track curvature. The tracks also play a role of shock absorbers and bear mechanisms to perform turning of the vehicle by applying different speed and/or curvature to the tracks.

A track chain member may comprise a shoe member, and a first rail member extending from the shoe member. The first rail member may include a first lug defining a first bore defining a first longitudinal axis and including a first bushing retention shelf disposed in the first bore, a second lug including a second bushing retention shelf disposed in the second bore. A third lug may extend in a direction opposite that of the first lug and second lug and may be disposed axially between the first lug and the second lug.