Pedal-driven roller board

摘要

The present invention relates to a roller board, and more particularly, to a pedal-driven roller board that converts a reciprocating motion of pedals formed on the board into a rotational motion to drive a gear, so that a user can drive the board without kicking the ground. Furthermore, the pedal-driven roller board includes a derailleur, so that a user can conveniently control the speed of the pedal-driven roller board. Moreover, a user can develop and strengthen his/her muscles by pedaling the pedal-driven roller board. To this end, a pedal-driven roller board according to the present invention includes: a handle disposed at the front side of a board to steer a front wheel; a rear wheel at the rear side of the board; and two pedals formed on the top surface of the board to drive the rear wheel. Further, the pedal-driven roller board includes: a link having an end hinged to the bottom surface of a pedal; a driving gear formed on an end of a crankshaft connected through a shaft to the other end of the link to convert a reciprocating motion of the pedal into a rotational motion; a clutch gear engaged with the driving gear to rotate, and selectively connected to one of either a first speed gear or a second speed gear to rotate same; a first connecting gear and a second connecting gear, which rotatably engage with the first speed gear and the second speed gear, respectively, and are installed on an end of a connecting shaft; a transmission gear installed on both ends of the connecting shaft and rotated by torque transmitted through the connecting shaft from the first and second connecting gears; and a rotation gear engaging with the transmission gear to rotate, and connected to the rear wheel through a rotation shaft to transmit the torque from the transmission gear to the rear wheel.

主权项

1. A pedal-driven rolling board in a rolling board characterized in that a handle 22 steering front wheels 20 is disposed at a front side of a board 10, and rear wheels 30 are axially engaged to a rear side of it by means of a rotary gear 70 and a rotary shaft 72, and two pedals 40 are formed on the upper surface of the board 10 for the purpose of driving the rear wheels 30, and a link 42 one end of which is hinged is installed on the lower surface of the pedal 40, and a crank shaft 44 is installed at the other end of the link 42 in an axial engagement way for converting the reciprocation movements of the pedals 40 into rotational movements, and a driving gear 46 is integrally engaged at an end portion of the crank shaft 44, so the rotational force of the crank shaft 44 is transferred to the rotary gear 70 by way of the driving gear 46, thus driving the rear wheels 30, and a saddle 80 is provided on the upper surface of a rear side of the board 10, comprising:
a clutch gear 50 which rotates in engagement with a driving gear 46 between a driving gear 46 and a rotary gear 70 for the purpose of driving the rear wheels 30 as the rotational force of the crank shaft 44 is transferred to the rotary gear 70 by way of the driving gear 46 and which is selectively connected with one speed change gear between a first speed change gear 52 and a second speed change gear 54; first and second connection gears 62 and 64 which rotate in engagement with the first speed change gear 52 and the second speed change gear 54 and are installed at an end portion of the connection shaft 60; and a driving force transfer gear 66 which is installed at both ends of the connection shaft 60 and receives the rotational force of the first and second connection gears 62 and 64 by way of the connection shaft 60 while being engaged with the rotary gear 70 for thereby rotating the rotary gear 70, and wherein the first speed change gear 52 and the second speed change gear 54 are installed on the same axis as the clutch gear 50, and clutch cams 50a, 52a and 54a are installed on the surface corresponding to the clutch gear 50 of the first speed change gear 52 and the second speed change gear 54 and at both sides of the clutch gear 50, so the speed change gear connected with the clutch gear 50 rotates, and a speed change lever 50b is further provided at an end portion of the clutch gear 50 for the purpose of connecting the clutch gear 50 with one between the first speed change gear 52 and the second speed change gear 54.