This utility model provides a novel cushion adjustment mechanism and child tricycle, which includes cushion; one end of the said main beam tube is connected with the cushion and the other end is connected with the tricycle body; the adjustment unit is fixing-connected with the main beam tube. The adjustment unit is provided with a positioning assembly; the rear part includes two fixing plates. One end of the fixing plates is connected with the rear wheel and the other end is connected with the adjustment unit. The fixing plate connected with the adjustment unit is provided with a counter locking screw rod. One end of the counter locking screw rod passes through the rotation hole and is fixing-connected with the adjustment unit. After adjustment, the child tricycle using this mechanism will have a good stability and avoids the slippage issue of the cushion height controlled by the friction force.

The invention relates to a clamping device (1) for fixing a wheelchair drive unit to a wheelchair frame. The clamping device (1) comprises a lever element (4), a first clamping jaw (2), a second clamping jaw (3) and a clamping jaw holder (5). The first clamping jaw (2) and the second clamping jaw (3) are movably mounted on the clamping jaw holder (5) via a jaw path (D.sub.0-D.sub.2) between an open position (D.sub.0) and a closed position (D.sub.2). The lever element (4) is movably coupled to the first clamping jaw (2) and the second clamping jaw (3) via a lever path (S.sub.H) such that a movement of the lever element (4) along the lever path (S.sub.H) causes the clamping jaws (2, 3) to move along the jaw path (D.sub.0-D.sub.2). A transmission arrangement couples the lever element (4) to the first clamping jaw (2) and the second clamping jaw (3) in such a way that, starting from the open position (D.sub.0) of the clamping jaws (2, 3), moving the lever element (4) by half the lever path (S.sub.H/2) causes the first clamping jaw (2) and the second clamping jaw (3) to move by more than half the jaw path (D.sub.0-D.sub.2/2) in the direction of the closed position (D.sub.2) of the clamping jaws (2, 3).

The invention relates to a clamping device (1) for fixing a wheelchair drive unit to a wheelchair frame. The clamping device (1) comprises a lever element (4), a first clamping jaw (2), a second clamping jaw (3) and a clamping jaw holder (5). The first clamping jaw (2) and the second clamping jaw (3) are movably mounted on the clamping jaw holder (5) via a jaw path (D.sub.0-D.sub.2) between an open position (D.sub.0) and a closed position (D.sub.2). The lever element (4) is movably coupled to the first clamping jaw (2) and the second clamping jaw (3) via a lever path (S.sub.H) such that a movement of the lever element (4) along the lever path (S.sub.H) causes the clamping jaws (2, 3) to move along the jaw path (D.sub.0-D.sub.2). A transmission arrangement couples the lever element (4) to the first clamping jaw (2) and the second clamping jaw (3) in such a way that, starting from the open position (D.sub.0) of the clamping jaws (2, 3), moving the lever element (4) by half the lever path (S.sub.H/2) causes the first clamping jaw (2) and the second clamping jaw (3) to move by more than half the jaw path (D.sub.0-D.sub.2/2) in the direction of the closed position (D.sub.2) of the clamping jaws (2, 3).

A powered wheeled riding device is configured to receive left and right foot inputs from a user and in response control a left motor and a right motor to move respective left and right wheels forwardly and backwardly consistent with the left and right foot inputs in order to steer the device without changing a direction of the wheels relative to a frame of the riding device. The riding device has at least one rear wheel that is not powered. The rear wheel is mounted on a wheel mount that rotates freely about a vertical axis so that the rear wheel freely is directed in any direction.

The present disclosure relates to a stroller comprising: a sheet portion including a sheet; a support frame including an upper support frame supporting the sheet, a lower support frame rotatably connected to the upper support frame by a hinge portion, and a frame support that maintains a fixed state between the upper support frame and the lower support frame; and a moving structure to which the support frame is detachably connected, the moving structure including a guide frame that allows the lower support layer to fold and support and is extended in the length direction, a drive frame including a rear wheel coupling portion having a front wheel coupling portion connected in a ‘¬’ shape to the front part of the guide frame and a rear wheel coupling portion having coupling shaft portions formed on both sides of the rear end of the guide frame, a front wheel supported by a support fork to be installed on the front wheel coupling portion, and a rear wheel installed on the rear wheel coupling portion through a rear wheel connecting shaft.

The present disclosure relates to a stroller comprising: a sheet portion including a sheet; a support frame including an upper support frame supporting the sheet, a lower support frame rotatably connected to the upper support frame by a hinge portion, and a frame support that maintains a fixed state between the upper support frame and the lower support frame; and a moving structure to which the support frame is detachably connected, the moving structure including a guide frame that allows the lower support layer to fold and support and is extended in the length direction, a drive frame including a rear wheel coupling portion having a front wheel coupling portion connected in a ‘¬’ shape to the front part of the guide frame and a rear wheel coupling portion having coupling shaft portions formed on both sides of the rear end of the guide frame, a front wheel supported by a support fork to be installed on the front wheel coupling portion, and a rear wheel installed on the rear wheel coupling portion through a rear wheel connecting shaft.

A vehicle may have a seat and front wheel similar to those of a bicycle. However, the vehicle may have two rear wheels. The position of the two rear wheels may be adjustable. When the two rear wheels touch each other, the vehicle may function as a bicycle. When they are moved apart, the vehicle may function as a tricycle. In tricycle mode, the vehicle may travel autonomously without a human rider. In bicycle mode, a human may ride the vehicle like a bicycle. To transition between bicycle and tricycle modes, each rear wheel may rotate about a horizontal axis that is parallel to a longitudinal axis of the vehicle. In some cases, a bike chain is connected to only one of the rear wheels. In bicycle mode, motion imparted by the chain to one rear wheel may be transferred to the other by friction.

A vehicle may have a seat and front wheel similar to those of a bicycle. However, the vehicle may have two rear wheels. The position of the two rear wheels may be adjustable. When the two rear wheels touch each other, the vehicle may function as a bicycle. When they are moved apart, the vehicle may function as a tricycle. In tricycle mode, the vehicle may travel autonomously without a human rider. In bicycle mode, a human may ride the vehicle like a bicycle. To transition between bicycle and tricycle modes, each rear wheel may rotate about a horizontal axis that is parallel to a longitudinal axis of the vehicle. In some cases, a bike chain is connected to only one of the rear wheels. In bicycle mode, motion imparted by the chain to one rear wheel may be transferred to the other by friction.

A transportation apparatus reconfigurable between at least two modes of operation. Each mode of operation comprises a mode of transport. A first mode of operation comprises a stroller, push-chair or perambulation (pram) mode. A second mode comprises a velocipede mode, such as a tricycle, bicycle and/or quadricycle mode.

A transportation apparatus reconfigurable between at least two modes of operation. Each mode of operation comprises a mode of transport. A first mode of operation comprises a stroller, push-chair or perambulation (pram) mode. A second mode comprises a velocipede mode, such as a tricycle, bicycle and/or quadricycle mode.