Patent ID: 12202303

DETAILED DESCRIPTION

The tire changing stand shown inFIG.1andFIG.2includes a frame1, a rear support leg2, which can be rotated relative to the frame to achieve a compact position, and a horizontal front leg3, which is attached to the lower end of the frame and is removable. The frame is located at an angle of 30-90 degrees to the base of the tire changing stand. A removable center shaft4perpendicular to the frame1is attached to the central part of the frame, and plastic support surfaces5of the rim attached to the frame1above and below the center shaft4, which are movable relative to the frame1. A lever system is attached to the upper end of the frame1, the position of which can be adjusted according to the diameter of the rim by changing the distance of the bracket6in relation to the center shaft4. A lever8is attached to the socket7attached to the bracket6, and the tire bead is pushed off the rim with the plate9attached to it. There are holes10in the frame near the lower plastic support surface, where the rod11preventing the rotation of the rim is fixed. The ratchet mechanism12with the tire mounting head13is placed on the center shaft4. The distance of the tire mounting head13from the center shaft4can be extended by changing the position of the arm14. A socket15is attached to the ratchet mechanism12, into which a lever8is inserted and the tire mounting head13is moved around the center shaft4. A step bushing16for centering the rims is placed on the center shaft.

The rim whose tire is to be changed is placed on the frame1and the center shaft4. In order to accurately center the rim, a stepped bushing16is placed on the center shaft4. The lever8is inserted into the socket7and the plate9on the lever8is placed in contact with the side surface of the tire, and the tire bead is pushed off the rim with the help of the lever8. The positions of the bracket6can be changed to achieve the exact position of the plate9in relation to the rim. The rim is rotated and pressure is applied from different angles until the bead of the tire is completely pushed off from the rim. The rim is then turned to the other side and the same process is repeated. To remove the tire from the rim, a rod11preventing the rotation of the rim is placed on the frame1, and a ratchet mechanism12with a tire mounting head13is installed on the center shaft4. The tire mounting head13is installed on the edge of the rim, and the bead of the tire is partially pulled over the tire mounting head13with a tire lever. Then the lever8is installed in the socket15on the ratchet mechanism12, and by pressing the lever8downwards a movement is given to the tire mounting head13. To achieve the best stability of the tire changer, the lever8is moved to a quarter turn. When reaching the lower position of the lever, the ratchet mechanism12allows the lever to be freely returned to the initial position and the movement repeated. With repeated up-and-down movements of the lever8, the tire mounting head13makes a full circle on the rim, and as a result, the first bead of the tire is removed. The mutual position of the frame1and the front leg3of this tire changing stand creates a stable system for pushing down the lever8, and the structure stays in place during operation of the tire mounting head13without the user having to stabilize it. The same technique is repeated to remove the other bead of the tire.

To mount a tire, the tire is pushed over the edge of the rim as much as possible with the hands, and both beads of the tire are installed by operating the tire mounting head13via the lever8as previously described. In order to remove the rim from the tire changing stand, the lever8, the ratchet mechanism12with the tire mounting head13and the stepped bushing16must be removed. Moving the tire changing stand from the transport position to the working position is simple, fast and can be done without additional tools. It can be used for changing motorcycle tires with rims of different diameters, which is primarily intended for tubeless tires and tires with inner tube.

Known solutions are characterized by the fact that they are relatively low and the lever is pulled horizontally. Therefore, the tire changer is unstable and inconvenient to use. This solution eliminates this problem, because the tire changer is located at an angle, thanks to which the tire change can be done in an upright position, and when the lever is pressed, the tire changer remains stable. Solutions known from the state of the art are also characterized by the fact that the tire changing stand must be bolted/rigidly connected to the ground/floor, which limits the device's portability and places of use. These industrial tire changing devices are heavy and not portable. However, this tire changer is lightweight and easy to disassemble and assemble, which makes it convenient to carry.

At least two factors create greater stability of this solution: (a) when operating the tire mounting head, the force applied on the lever is directed through the frame towards the base surface of the tire changing stand, which means that the user does not have to keep the tire changing stand in place at the same time, and (b) the ratchet mechanism between the lever and the tire mounting head allows the lever to be pressed from the same position during the entire tire changing process.

The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.