# US 10,119,602 B2 · Power transmission apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,602 B2 - Document ID: US10119602B2 - Status: Granted - Kind: B2 - Application number: 15/311,834 - Filed: 2015-05-15 - Published: 2017-05-18 - Granted: 2018-11-06 - Earliest claimed: 2014-05-16 - Assignees: Technovation Partners Co., Ltd. - Applicants: Technovation Partners Co., Ltd. - Inventors: Kyung Yul Hyun - Web page: https://patentgrep.com/patent/US10119602B2 ## CPC - F16H 37/041: {for conveying rotary motion with constant gear ratio} - B62M 11/06: with spur gear wheels (B62M11/14 takes precedence) - B62M 11/145: {built in, or adjacent to, the bottom bracket} - F16D 23/12: Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) - F16H 1/28: with gears having orbital motion - F16H 1/32: in which the central axis of the gearing lies inside the periphery of an orbital gear - F16H 3/003: {the gear ratio being changed by inversion of torque direction} - F16H 3/005: {for gearings using gears having orbital motion} - F16H 25/20: Screw mechanisms (with automatic reversal F16H25/12) - F16H 37/16: with a driving or driven member which both rotates or oscillates on its axis and reciprocates - F16H 25/2018: {with both screw and nut being driven, i.e. screw and nut are both rotating} - F16H: GEARING - B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16) - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract The present invention discloses a power transmission apparatus. The power transmission apparatus includes: an input shaft including a male screw portion formed thereon; a pair of input gears formed on the input shaft to be freely rotatable with the male screw portion being interposed therebetween; an output gear formed to be rotatable in a state of being linked with the pair of input gears; and a power interrupting unit screw-coupled to the male screw portion of the input shaft, and configured to rectilinearly reciprocate along the input shaft by a rotation of the input shaft to be selectively engaged with any one of the pair of input gears so as to transmit a power. ## Claims ### Claim 1 A power transmission apparatus comprising: an input shaft including a male screw portion formed thereon; a pair of input gears formed on the input shaft to be freely rotatable with the male screw portion being interposed therebetween; an output gear formed to be rotatable in a state of being linked with the pair of input gears; and a power interrupting unit screw-coupled to the male screw portion of the input shaft, and configured to rectilinearly reciprocate along the input shaft by a rotation of the input shaft to be selectively engaged with any one of the pair of input gears so as to transmit a power, wherein the pair of input gears are formed to have different diameters, and an input gear having a smaller diameter is linked with the output gear through an idle gear. ### Claim 2 (depends on 1) The power transmission apparatus of claim 1, wherein the output gear is formed in a cylindrical structure that accommodates therein the input gears and the input shaft formed with the power interrupting unit, and teeth are formed on an inner peripheral surface of the output gear to be meshed and linked with the input gears accommodated in the output gear. ### Claim 3 (depends on 1) The power transmission apparatus of claim 1, wherein the input shaft is disposed within the output gear to be eccentric to a center of the output gear. ### Claim 4 (depends on 1) The power transmission apparatus of claim 1, wherein the power interrupting unit includes: a loader having a female screw portion formed on an inner peripheral surface thereof to be coupled with the male screw portion, and configured to rectilinearly reciprocate along the input shaft, and a plurality of guide rods disposed along the inner peripheral surface of the loader and through the loader, opposite ends of the guide rods being in close contact with side faces of the input gears that face the loader or the extension portion to be slidable. ### Claim 5 (depends on 4) The power transmission apparatus of claim 4, wherein the guide rod is formed in divided structures that are connected to each other by an elastic member. ### Claim 6 A power transmission apparatus comprising: an input shaft including a male screw portion formed thereon, and configured to be rotatable in a forward/reverse direction; a power interrupting unit screw-coupled to the male screw portion, and configured to rectilinearly reciprocate along the input shaft by a rotation of the input shaft; a pair of input gears formed on the input shaft to be freely rotatable with the power interrupting unit being interposed therebetween, and configured to be selectively engaged with the power interrupting unit to be rotated according to a movement of the power interrupting unit; and an output gear formed to be rotatable in a state of being selectively linked with the pair of input gears, wherein both the pair of input gears configured to be selectively engaged with the power interrupting unit to be rotated are rotated in a same direction, and wherein the pair of input gears are formed to have different diameters, and an input gear having a smaller diameter is linked with the output gear through an idle gear. ### Claim 7 (depends on 6) The power transmission apparatus of claim 6, wherein the output gear is formed in a cylindrical structure that accommodates therein the input gears and the input shaft formed with the power interrupting unit, and teeth are formed on an inner peripheral surface of the output gear to be meshed and linked with the input gears accommodated in the output gear. ### Claim 8 (depends on 7) The power transmission apparatus of claim 7, wherein the input shaft is disposed within the output gear to be eccentric to a center of the output gear. ### Claim 9 (depends on 6) The power transmission apparatus of claim 6, wherein the power interrupting unit includes: a loader having a female screw portion formed on an inner peripheral surface thereof to be coupled with the male screw portion, and configured to rectilinearly reciprocate along the input shaft, and a plurality of guide rods disposed along the inner peripheral surface of the loader and through the loader, opposite ends of the guide rods being in close contact with side faces of the input gears that face the loader or the extension portion to be slidable. ### Claim 10 (depends on 9) The power transmission apparatus of claim 9, wherein the guide rod is formed in divided structures that are connected to each other by an elastic member. ### Claim 11 A power transmission apparatus comprising: an input shaft including a male screw portion formed thereon; an input gear formed at a side of the input shaft to be freely rotatable; an output gear formed to be divided into an inner gear portion that is coupled to be rotatable in a state of being linked with the input gear, and an extension portion that extends from the inner gear portion in a direction of the input shaft, and is coupled to the input shaft to be freely rotatable; and a power interrupting unit coupled to the male screw portion of the input shaft, and configured to rectilinearly move along the input shaft by a rotation of the input shaft to be selectively engaged with the input gear or the extension portion of the output gear so as to transmit a power, wherein the input gear is linked with the inner gear portion through a planetary gear. ### Claim 12 (depends on 11) The power transmission apparatus of claim 11, wherein the power interrupting unit includes: a loader having a female screw portion formed on an inner peripheral surface thereof to be coupled with the male screw portion, and configured to rectilinearly reciprocate along the input shaft, and a plurality of guide rods disposed along the inner peripheral surface of the loader and through the loader, opposite ends of the guide rods being in close contact with side faces of the input gears that face the loader or the extension portion to be slidable. ### Claim 13 (depends on 12) The power transmission apparatus of claim 12, wherein the guide rod is formed in divided structures that are connected to each other by an elastic member. ### Claim 14 A power transmission apparatus comprising: an input shaft including a male screw portion formed thereon, and configured to be rotatable in a forward/reverse direction; a power interrupting unit screw-coupled to the male screw portion, and configured to rectilinearly reciprocate along the input shaft by a rotation of the input shaft; an input gear formed on the input shaft to be freely rotatable, and configured to be engaged with the power interrupting unit to be rotated according to a movement of the power interrupting unit; and an output gear formed to be divided into an inner gear portion that is coupled to be rotatable in a state of being linked with the input gear, and an extension portion that extends from the inner gear portion in a direction of the input shaft, and is coupled to the input shaft to be freely rotatable, wherein a rotation of the input gear selectively engaged with the power interrupting unit and a rotation of the output gear by a rotation of the extension portion are performed in a same direction, and wherein the input gear is linked with the inner gear portion through a planetary gear. ### Claim 15 (depends on 14) The power transmission apparatus of claim 14, wherein the power interrupting unit includes: a loader having a female screw portion formed on an inner peripheral surface thereof to be coupled with the male screw portion, and configured to rectilinearly reciprocate along the input shaft, and a plurality of guide rods disposed along the inner peripheral surface of the loader and through the loader, opposite ends of the guide rods being in close contact with side faces of the input gears that face the loader or the extension portion to be slidable. ### Claim 16 (depends on 15) The power transmission apparatus of claim 15, wherein the guide rod is formed in divided structures that are connected to each other by an elastic member.