This present invention relates to an anti-skid device adapted to being mounted on tyres of the vehicle wheels to provide traction and wheel to ground contact enhancement in snowy and icy conditions. The device includes a central hub from which protrudes radially three arms which are extended at the outer end by anti-slip components transversally embracing the tread of the tyre. The inner area of the anti-slip components in contact with the tread is designed to increase friction to prevent circumferential displacement of the anti-skid device. When the car is moving a horizontal depression is formed at tyre-ground contact and this provokes a change in wheel radius. Integrated springs follows the depression by moving radially inwards to ensure that the anti-skid device stays attached to the tyre even when an anti-slip component is at the ground contact point at the bottom of wheel. A fastening handle integrated into the hub secures the device on the wheel by simultaneously tightening the arms radially inwards.

An electrified tractor includes a vehicle body, an electric motor, a battery, an inverter configured to control input-output electric power of the battery, a wheel for traveling, and a control device. On condition that the electrified tractor travels inside a restriction area determined in advance as one condition, the control device controls the inverter such that the input-output electric power of the battery falls within a specific electric power range determined in advance. The control device determines whether or not there is a possibility that the electrified tractor moves from the restriction area to outside the restriction area. In a case where an affirmative determination is made in a determination process during a restriction process, the control device expands the specific electric power range as compared with a case where a negative determination is made in the determination process.

An electrified tractor includes a vehicle body, an electric motor, a battery, an inverter configured to control input-output electric power of the battery, a wheel for traveling, and a control device. On condition that the electrified tractor travels inside a restriction area determined in advance as one condition, the control device controls the inverter such that the input-output electric power of the battery falls within a specific electric power range determined in advance. The control device determines whether or not there is a possibility that the electrified tractor moves from the restriction area to outside the restriction area. In a case where an affirmative determination is made in a determination process during a restriction process, the control device expands the specific electric power range as compared with a case where a negative determination is made in the determination process.

An anti-skid device includes a first main body and a second main body disposed rearward of the first main body, both of which are made of elastic material. The first main body has: a first ground-contactable sheet-like part that elongates in a circumferential direction; an inside rear connecting part provided at rear side of the first ground-contactable sheet-like; and an outside front connecting part provided at front side of the first ground-contactable sheet-like part. The second main body has: a second ground-contactable sheet-like part that elongates in the circumferential direction; an inside front connecting part provided at front side of the second ground-contactable sheet-like part; and an outside rear connecting part provided at rear side of the second ground-contactable sheet-like part. The inside rear connecting part of the first main body and the inside front connecting part of the second main body are connectable with each other.

An anti-skid device includes a first main body and a second main body disposed rearward of the first main body, both of which are made of elastic material. The first main body has: a first ground-contactable sheet-like part that elongates in a circumferential direction; an inside rear connecting part provided at rear side of the first ground-contactable sheet-like; and an outside front connecting part provided at front side of the first ground-contactable sheet-like part. The second main body has: a second ground-contactable sheet-like part that elongates in the circumferential direction; an inside front connecting part provided at front side of the second ground-contactable sheet-like part; and an outside rear connecting part provided at rear side of the second ground-contactable sheet-like part. The inside rear connecting part of the first main body and the inside front connecting part of the second main body are connectable with each other.

A tire traction and vehicle turning device attaches to a tire of a vehicle to dislodge the vehicle from unfavorable ground conditions, such as snow, ice, or sand. The tire traction and vehicle turning device includes a tire-mounting body, a plurality of gripping treads, and a tie-down. The tire-mounting body attaches to a tire of the vehicle. The plurality of gripping treads provides a separate surface for the vehicle to gain traction due to differing coefficients of friction between the plurality of gripping treads and the grounds surface compared to the tire and the ground surface. The tie-down is positioned through the rim of the wheel to secure the tire-mounting body to the tire. As the tire is rotated, the tire traction and vehicle turning device is positioned between the ground surface and the tire, lifting the vehicle and propelling the vehicle in the direction the rotating tire is pointing.

A tire traction and vehicle turning device attaches to a tire of a vehicle to dislodge the vehicle from unfavorable ground conditions, such as snow, ice, or sand. The tire traction and vehicle turning device includes a tire-mounting body, a plurality of gripping treads, and a tie-down. The tire-mounting body attaches to a tire of the vehicle. The plurality of gripping treads provides a separate surface for the vehicle to gain traction due to differing coefficients of friction between the plurality of gripping treads and the grounds surface compared to the tire and the ground surface. The tie-down is positioned through the rim of the wheel to secure the tire-mounting body to the tire. As the tire is rotated, the tire traction and vehicle turning device is positioned between the ground surface and the tire, lifting the vehicle and propelling the vehicle in the direction the rotating tire is pointing.

A traction device attachable to a wheel having a rim to which a tire is mounted. The traction device includes first and second gripping elements facing each other, the second gripping element being longitudinally movable between an extended position and a retracted position, the first and second gripping elements being closer to each other in the retracted position than in the extended position. When the traction device is operatively mounted to the wheel with the second gripping element in the retracted position, the traction device extends across the tire thread and the first and second gripping elements grip the wheel therebetween at the rim, and, when the second gripping element is in the extended position, the traction device is removable from the wheel.

A plurality of disposable single fabricated piece tire grips with friction contact surfaces and cable ties ratchet mounted on wheel contact surfaces of tires mounted on wheels with openings allowing the grips to secure there through for easy application and fits all tires regardless of size.

A wheel traction device is adapted for providing traction for a wheel of a vehicle to escape from a mud ground during rotation of the wheel, and includes: a guiding unit having a guiding portion adapted to abut against the wheel; a bearing unit that is detachably connected to the guiding unit, and that has a bearing portion adapted to be positioned on the mud ground such that, during rotation of the wheel, the bearing unit and the guiding unit are prevented from being driven by the rotation of the wheel to move relative to the mud ground, thereby allowing the wheel to roll over the bearing portion under guidance of the guiding portion; and a fastening unit that detachably fastens the bearing and guiding units together.