An anti-skid device with mounting from the outside for wheels, particularly with alloy rims with central hole, includes: a central body intended to be placed at the hub of a wheel on which the anti-skid device is to be mounted; arms radially protruding from this central body and terminating in terminal elements intended to be placed on the tread of the tire; chain segments connected to the terminal elements forming a ring on the tread of the tire; a device designed to be fixed to the rim of the wheel; a connecting element between the device and the central body of the anti-skid device; and a tensioning mechanism placed in the central body which can be actuated to pull the connecting element and bring the central body closer to the wheel hub. The device is an expansion device fixed in the central hole of the rim of the wheel.

An anti-skid device with mounting from the outside for wheels, particularly with alloy rims with central hole, includes: a central body intended to be placed at the hub of a wheel on which the anti-skid device is to be mounted; arms radially protruding from this central body and terminating in terminal elements intended to be placed on the tread of the tire; chain segments connected to the terminal elements forming a ring on the tread of the tire; a device designed to be fixed to the rim of the wheel; a connecting element between the device and the central body of the anti-skid device; and a tensioning mechanism placed in the central body which can be actuated to pull the connecting element and bring the central body closer to the wheel hub. The device is an expansion device fixed in the central hole of the rim of the wheel.

An anti fall-off cable chain includes two side ropes, a transition chains and connecting pieces, wherein the two side ropes are arranged horizontally, the transition chains are longitudinally arranged between the two side ropes, and the side ropes and the transition chains are connected through the connecting pieces. Each connecting piece includes an attaching part to be attached to a side face of a tire, a side rope mounting part arranged at one end of the attaching part, and a transition chain mounting part arranged at another end of the attaching part. When pulled by the part, attached to the tread of the tire, of the transition chain to tilt upwards, the transition chain connecting pieces trend to draw away from the mounting holes and are limited by first upper limiting parts.

An anti fall-off cable chain includes two side ropes, a transition chains and connecting pieces, wherein the two side ropes are arranged horizontally, the transition chains are longitudinally arranged between the two side ropes, and the side ropes and the transition chains are connected through the connecting pieces. Each connecting piece includes an attaching part to be attached to a side face of a tire, a side rope mounting part arranged at one end of the attaching part, and a transition chain mounting part arranged at another end of the attaching part. When pulled by the part, attached to the tread of the tire, of the transition chain to tilt upwards, the transition chain connecting pieces trend to draw away from the mounting holes and are limited by first upper limiting parts.

The present invention is directed to a tire chain tensioner having a central hub, a tension adjuster, and a tensioning member. There may be one or more tension adjusters attached to the central hub and there may be one or more tensioning members attached to each tension adjuster. The tension adjuster may be rotated so as to cause a corresponding tensioning member to pull a tire chain tight against a tire, thus minimizing slipping of the tire chain on the tire.

The present invention is directed to a tire chain tensioner having a central hub, a tension adjuster, and a tensioning member. There may be one or more tension adjusters attached to the central hub and there may be one or more tensioning members attached to each tension adjuster. The tension adjuster may be rotated so as to cause a corresponding tensioning member to pull a tire chain tight against a tire, thus minimizing slipping of the tire chain on the tire.

An external tensioning anti-skid chain system for an automobile, whose characteristics include a number of U-shaped anti-skid boards with the same structure and a set of tightening mechanisms. The two vertical edges of the U-shaped anti-skid plate are attached to the inside and outside of a tire. The first section and the last section of the U-shaped anti-skid plate are connected by a buckle structure. The tightening mechanism is installed between two adjacent U-shaped anti-skateboards, and the U-shaped anti-skid plates are mutually connected by connection rings. The anti-skid chain system has a simple structure, making installation and disassembly very easy.

An external tensioning anti-skid chain system for an automobile, whose characteristics include a number of U-shaped anti-skid boards with the same structure and a set of tightening mechanisms. The two vertical edges of the U-shaped anti-skid plate are attached to the inside and outside of a tire. The first section and the last section of the U-shaped anti-skid plate are connected by a buckle structure. The tightening mechanism is installed between two adjacent U-shaped anti-skateboards, and the U-shaped anti-skid plates are mutually connected by connection rings. The anti-skid chain system has a simple structure, making installation and disassembly very easy.

The present invention is directed to a tire chain tensioner having a central hub, a tension adjuster, and a tensioning member. There may be one or more tension adjusters attached to the central hub and there may be one or more tensioning members attached to each tension adjuster. The tension adjuster may be rotated so as to cause a corresponding tensioning member to pull a tire chain tight against a tire, thus minimizing slipping of the tire chain on the tire.

The present invention is directed to a tire chain tensioner having a central hub, a tension adjuster, and a tensioning member. There may be one or more tension adjusters attached to the central hub and there may be one or more tensioning members attached to each tension adjuster. The tension adjuster may be rotated so as to cause a corresponding tensioning member to pull a tire chain tight against a tire, thus minimizing slipping of the tire chain on the tire.