WO2007133046A1 - Power transmission of land rowing machine - Google Patents

Power transmission of land rowing machine Download PDF

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Publication number
WO2007133046A1
WO2007133046A1 PCT/KR2007/002393 KR2007002393W WO2007133046A1 WO 2007133046 A1 WO2007133046 A1 WO 2007133046A1 KR 2007002393 W KR2007002393 W KR 2007002393W WO 2007133046 A1 WO2007133046 A1 WO 2007133046A1
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WO
WIPO (PCT)
Prior art keywords
gear
gears
driving
power transmission
auxiliary
Prior art date
Application number
PCT/KR2007/002393
Other languages
French (fr)
Inventor
Gil-Sung Lee
Original Assignee
Gilroad Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gilroad Co., Ltd. filed Critical Gilroad Co., Ltd.
Publication of WO2007133046A1 publication Critical patent/WO2007133046A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C31/00—Aircraft intended to be sustained without power plant; Powered hang-glider-type aircraft; Microlight-type aircraft
    • B64C31/04—Man-powered aircraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/24—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers
    • B62M1/32—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers characterised by directly driving the wheel axle, e.g. by using a ratchet wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K13/00—Cycles convertible to, or transformable into, other types of cycles or land vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K23/00—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips
    • B62K23/02—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips hand actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/14—Rider propulsion of wheeled vehicles operated exclusively by hand power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/14—Hand-grips for hand-operated cranks

Definitions

  • the present invention relates to a power transmission of a land rowing machine, and more particularly, to a power transmission of a land rowing machine in which a driving force is not transmitted in one direction but is continuously transmitted in bi-directions during the forward and backward rotations of a power transmitting unit when the driving force is generated by the same force so that the ability of transmitting the driving force is doubled or higher.
  • a land rowing machine 100 as illustrated in FIG. 8, a handlebar unit 120 provided in the front side of a main frame 110 and having a wheel 122 mounted thereto, a rear wheel unit 130 having an axle 134 provided with a rotation gear 132 and wheels 136 mounted to the sides of the axel 134, a power transmitting unit 140 provided in the middle of the land rowing machine 100 and having a driving gear 144 in which a ratchet wheel (not shown) to transmit a driving force in one direction is installed around a driving shaft 142 and a driven gear 146 that is engaged with the rotation gear to transmit a rotational force and is integrally formed with the driving gear 144, and a seat 150 provided in the upper side of the power transmitting unit 140 to reciprocate on rod-shaped guide rails 154 and having a rack gear 152 engages with the driving gear 144 and is mounted to the lower side of the seat 150.
  • a ratchet wheel not shown
  • auxiliary driving gears 162 in which conventional ratchet wheels to transmit a driving force in a predetermined direction (not shown) are installed, are mounted to the lateral sides of the driving shaft 142, and levers 160 respectively having single inner gears 164 engaged with the auxiliary driving gears 162 and connected to supporting shafts 165 formed on the frame to be freely pivot.
  • the transmission provided in the land rowing machine has a drawback that the driving force is transmitted by the ratchet wheel provided inside the driving gear only in a predetermined direction, that is, the auxiliary driving gears transmit the driving force only in the predetermined direction when the seat reciprocates forward and backward or the levers are pivoted upward and downward so that the driving force of the land rowing machine is decreased.
  • the present invention has been made in view of the above and/or other problems, and it is an aspect of the present invention to provide a power transmission of a land rowing machine for continuously transmitting a driving force in both of the forward and backward directions as well as in one direction of the forward and backward directions.
  • a power transmission of a land rowing machine comprising: a driving gear and a driven gear mounted around a driving shaft of a power transmitting unit to be engaged with a rotation gear mounted around a driven shaft of a rear wheel unit of a main body frame and having a conventional one-way ratchet wheel installed therein, a rack gear provided on the lower side of a seat to be reciprocated along a guide rail and engaged with the driving gear, auxiliary driving gears mounted on the lateral sides of the driving shaft and having conventional one-way ratchet wheels installed therein, and supporting shafts in which inner gears and levers engaged with the auxiliary gears are formed to generate a propelling force, the power transmission comprising a first propelling unit configured such that the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions when the seat is reciprocated by the driven shaft and the rack gear.
  • the first propelling unit comprises: an auxiliary driving gear mounted around the driven shaft and having a oneway ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the driving gear provided to the driving shaft; and an extended rack gear unit extended from the rack gear and integrally formed with the rack gear to be engaged with the auxiliary driving gear.
  • the power transmission further comprises a second propelling unit to transmit the driving force to the auxiliary driving gears and the inner gears not in a one-way direction but continuously in both directions during the upward and downward pivots of the levers.
  • the second auxiliary propelling unit comprises: an outer gear mounted around the supporting shaft of the auxiliary driving gear connected to the inner gear and rotated at the same radius of rotation as that of the inner gear during the pivot of the lever; and an auxiliary propelling gear mounted around the driving shaft, having a ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the auxiliary driving gear, and engaged with the outer gear.
  • the inner gears are made into first outer gears, second outer gears are mounted around the supporting shafts to be engaged with and to be rotated by the first outer gears, and connecting gears are provided to the main body frame between the outer gears and the auxiliary propelling gears.
  • the inner gears associated with the levers and the outer gears of the second propelling unit are connected to conventional clutches provided between the levers and the main body frame so that the driving force is transmitted and cut off.
  • a bevel gear unit is provided on the driven shaft, a rotation shaft is coupled with a vertical bevel gear to be freely rotated by a frame (F) , and a propeller is mounted to the upper end of the rotation shaft.
  • FIG. 1 is a perspective view illustrating a power transmission of a land rowing machine according to an embodiment of the present invention
  • FIG. 2 is a plan view schematically illustrating main parts of the power transmission of a land rowing machine in FIG. 1;
  • FIG. 3 is a schematic side sectional view illustrating the power transmission of a land rowing machine in FIG. 2;
  • FIG. 4 is a plan view illustrating main parts of a power transmission of a land rowing machine according to another embodiment of the present invention.
  • FIG. 5 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
  • FIG. 6 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention
  • FIG. 7 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
  • FIG. 8 is an exploded perspective view schematically illustrating a conventional land rowing machine.
  • FIG. 1 is a perspective view illustrating a power transmission of a land rowing machine according to an embodiment of the present invention
  • FIG. 2 is a plan view schematically illustrating main parts of the power transmission of a land rowing machine in FIG. 1
  • FIG. 3 is a schematic side sectional view illustrating the power transmission of a land rowing machine in FIG. 2.
  • a land rowing machine 100 includes a driving gear 144 and a driven gear 146 mounted around a driving shaft 142 of a power transmitting unit 140 to be engaged with a rotation gear 132 mounted around a driven shaft 134 of a rear wheel unit 130 of a main body frame 110 and having a conventional one-way ratchet wheel (not shown) installed therein, a rack gear 152 provided on the lower side of a seat 150 to be reciprocated along a guide rail 154 and engaged with the driving gear, auxiliary driving gears 162 mounted on the lateral sides of the driving shaft and having conventional one-way ratchet wheels (not shown) installed therein, and supporting shafts 165 in which inner gears 164 and levers 160 engaged with the auxiliary gears 162 are formed to generate a propelling force.
  • the land rowing machine further includes, in order that the driving force is not transmitted in a one way direction but is continuously transmitted in both directions during the forward and backward rotation of the power transmitting unit, a first propelling unit 10 configured such that the driving force is not transmitted in one-way direction but is continuously transmitted in both directions when the seat 150 is reciprocated by the driven shaft 134 and the rack gear 152.
  • the driving gear and the auxiliary driving gears are mounted to transmit the driving force in the same direction.
  • the first propelling unit 10 includes an auxiliary driving gear 12 mounted around the driven shaft 134 and having a conventional one-way ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the driving gear 144 provided to the driving shaft 142, and an extended rack gear unit 14 extended from the rack gear and integrally formed with the rack gear to be engaged with the auxiliary driving gear.
  • the driving force of the driving gear is transmitted to the rotation gear via the driven gear such that the driven shaft is rotated to generate the propelling force.
  • the auxiliary driving gear is idled by the one-way ratchet wheels.
  • the driving gear is idled by the one-way ratchet wheels and the driving force of the auxiliary driving gear is transmitted by the ratchet wheels such that the driven shaft is rotated to generate the propelling force.
  • the driving force which has been transmitted in the one-way direction during the reciprocation of the seat in the conventional power transmission, is transmitted in both directions, that is, in the forward and backward directions by the auxiliary driving gear and the extended rack gear, that is, the first propelling unit, so that larger propelling force can be generated.
  • FIG. 4 is a plan view illustrating main parts of a power transmission of a land rowing machine according to another embodiment of the present invention.
  • second propelling units 20 transmit the driving force to the auxiliary driving gears 162 and the inner gears 164 not in one-way direction but continuously in both directions during the upward and downward pivots of the levers 160.
  • Each of the second propelling unit 20 preferably includes an outer gear 22 mounted around the supporting shaft 165 of the auxiliary driving gear 162 connected to the inner gear 164 and rotated at the same radius of rotation as that of the inner gear 164 during the pivot of the lever 160, and an auxiliary propelling gear 24 mounted around the driving shaft 142, having a ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the auxiliary driving gear 162, and engaged with the outer gear.
  • the levers pivot upwardly, the inner gears rotate the auxiliary driving gears to transmit the driving force.
  • the driving shaft is rotated to generate the propelling force.
  • the auxiliary propelling gears 24 engaged with the outer gears of the second propelling unit connected to the levers to be pivoted are idled by the one-way ratchet wheels.
  • the auxiliary driving gears which are rotated by the inner gears, are idled by the one-way ratchet wheels, and the auxiliary propelling gears, which are rotated by the outer gears, receive the driving force due to the one-way ratchet wheels to rotate the driving shaft.
  • the propelling force can be doubled in comparison to the propelling force transmitted by the conventional power transmission.
  • FIG. 5 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
  • the inner gears engaged with the auxiliary driving gears since it is difficult to manufacture the inner gears engaged with the auxiliary driving gears, the inner gears have a simpler structure.
  • the inner gears are made to first outer gears 30, second outer gears 32 are mounted around the supporting shafts 165 to be engaged with and to be rotated by the first outer gears, and connecting gears 34 are provided to the main body frame between the outer gears 22 and the auxiliary propelling gears 24 to be freely rotated.
  • the outer gears and the second outer gears are coupled with the supporting shafts by spline couplers formed on the levers such that the outer gears and the second outer gears are smoothly rotated due to the upward and downward pivots of the levers during the upward and downward pivots of the levers .
  • the inner gears to rotate the auxiliary driving gears are substituted with a conventional type of outer gears without the complicated manufacturing thereof, the driving force, as described above, is transmitted in both directions due to the upward and downward pivots of the levers and the inner gears can be easily manufactured.
  • FIG. 6 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
  • the land rowing machine can be carried and kept in custody by minimizing interference with the levers.
  • the inner gears 164 associated with the levers 160 and the outer gears 22 of the second propelling unit 20 are connected to conventional clutches 40 provided between the levers 160 and the main body frame 110 so that the driving force is transmitted and cut off.
  • the clutches like a claw clutch, contact to transmit the driving force to the supporting shafts only during the transmission of the driving force and is separated from the supporting shafts to cut off the driving force.
  • elastic members 42 such as a spring are disposed between the levers 160 and the main body frame 110 and fixing bars 44 formed to the levers are installed to be fixed to and to be released from hooks 46 formed in the main body frame 110. Due to this structure, the levers have supporting shafts as long as distances where the elastic members are shrunk and expanded such that the inner gears and the outer gears are separated from the auxiliary driving gears and the auxiliary propelling gears along the supporting shafts.
  • FIG. 7 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
  • a bevel gear unit 50 is provided on the driven shaft 134 and having horizontal and vertical bevel gears 52 and 54, such as conventional linear bevel gears, to be engaged with each other, a rotation shaft 55 is coupled with the vertical bevel gear 54 and fixed to the main body frame 110 to be freely rotated by a conventional frame F, and a conventional propeller 56 is mounted to the upper end of the rotation shaft 55.
  • the rotation shaft which is mounted to the main body frame to be freely rotated by the frame, is preferably mounted to be supported and to be freely rotated by a conventional bearing installed in the end of the frame contacting the rotation shaft.
  • the end of the frame where the opposite end of the rotation shaft is positioned is preferably mounted to the main body frame without vibration by welding or a screw.
  • the land rowing machine can not fly for a long distance but for a short distance using the high propelling force of the first propelling unit and the second propelling unit.
  • the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions by the first propelling unit during the power transmission of the land rowing machine, so that the propelling force is doubled.
  • the propelling force of the land rowing machine can be maximized in association with the first propelling unit .
  • levers can be folded into the front side due to the clutches to transmit and cut off the driving force when the land rowing machine is carried or kept in custody, the interference by the levers can be minimized.
  • the land rowing machine since the power transmission of the land rowing machine includes the auxiliary driving unit to transmit the driving force such that the propelling force can be maximized, the land rowing machine can be used as a traveling device as occasion demands.

Abstract

A power transmission of a land rowing machine is disclosed. In a land rowing machine including a driving gear and a driven gear, engaged with a rotation gear of a driven shaft of a rear wheel unit of a main body frame and having a one-way ratchet wheel, a rack gear on the lower side of a seat to be reciprocated along a guide rail and engaged with the driving gear, auxiliary driving gears mounted on the sides of the driving shaft and having a one-way ratchet wheels installed therein, and supporting shafts in which inner gears and levers engaged with the auxiliary gears generate a propelling force, the power transmission includes a first propelling unit configured such that the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions when the seat is reciprocated by the driven shaft and the rack gear.

Description

POWER TRANSMISSION OF LAND ROWING MACHINE
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a power transmission of a land rowing machine, and more particularly, to a power transmission of a land rowing machine in which a driving force is not transmitted in one direction but is continuously transmitted in bi-directions during the forward and backward rotations of a power transmitting unit when the driving force is generated by the same force so that the ability of transmitting the driving force is doubled or higher.
Description of the Related Art
Generally, a land rowing machine 100, as illustrated in FIG. 8, a handlebar unit 120 provided in the front side of a main frame 110 and having a wheel 122 mounted thereto, a rear wheel unit 130 having an axle 134 provided with a rotation gear 132 and wheels 136 mounted to the sides of the axel 134, a power transmitting unit 140 provided in the middle of the land rowing machine 100 and having a driving gear 144 in which a ratchet wheel (not shown) to transmit a driving force in one direction is installed around a driving shaft 142 and a driven gear 146 that is engaged with the rotation gear to transmit a rotational force and is integrally formed with the driving gear 144, and a seat 150 provided in the upper side of the power transmitting unit 140 to reciprocate on rod-shaped guide rails 154 and having a rack gear 152 engages with the driving gear 144 and is mounted to the lower side of the seat 150.
Moreover, auxiliary driving gears 162, in which conventional ratchet wheels to transmit a driving force in a predetermined direction (not shown) are installed, are mounted to the lateral sides of the driving shaft 142, and levers 160 respectively having single inner gears 164 engaged with the auxiliary driving gears 162 and connected to supporting shafts 165 formed on the frame to be freely pivot.
In the land rowing machine constructed as described above, as the rack gear, mounted to the lower side of the seat, rotates the driving gear or pivots the levers up and down and the auxiliary driving gears, mounted around the driving shaft, are rotated during the reciprocation of the seat, the rotation gear engaged with the driving gear rotate the driven shaft in a predetermined direction so that the rear wheels of the rear wheel unit roll and the driving force is generated.
However, the transmission provided in the land rowing machine has a drawback that the driving force is transmitted by the ratchet wheel provided inside the driving gear only in a predetermined direction, that is, the auxiliary driving gears transmit the driving force only in the predetermined direction when the seat reciprocates forward and backward or the levers are pivoted upward and downward so that the driving force of the land rowing machine is decreased.
SUMMARY OF THE INVENTION
Therefore, the present invention has been made in view of the above and/or other problems, and it is an aspect of the present invention to provide a power transmission of a land rowing machine for continuously transmitting a driving force in both of the forward and backward directions as well as in one direction of the forward and backward directions.
It is another aspect of the present invention to provide a power transmission of a land rowing machine for maximizing power transmission efficiency. It is still another aspect of the present invention to provide a power transmission of a land rowing machine for minimizing interference caused by a lever when the land rowing machine is carried or kept in custody.
It is still another aspect of the present invention to provide a power transmission of a land rowing machine having an auxiliary driving unit.
In accordance with the present invention, the above and other objects can be accomplished by the provision of a power transmission of a land rowing machine comprising: a driving gear and a driven gear mounted around a driving shaft of a power transmitting unit to be engaged with a rotation gear mounted around a driven shaft of a rear wheel unit of a main body frame and having a conventional one-way ratchet wheel installed therein, a rack gear provided on the lower side of a seat to be reciprocated along a guide rail and engaged with the driving gear, auxiliary driving gears mounted on the lateral sides of the driving shaft and having conventional one-way ratchet wheels installed therein, and supporting shafts in which inner gears and levers engaged with the auxiliary gears are formed to generate a propelling force, the power transmission comprising a first propelling unit configured such that the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions when the seat is reciprocated by the driven shaft and the rack gear.
The first propelling unit comprises: an auxiliary driving gear mounted around the driven shaft and having a oneway ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the driving gear provided to the driving shaft; and an extended rack gear unit extended from the rack gear and integrally formed with the rack gear to be engaged with the auxiliary driving gear.
The power transmission further comprises a second propelling unit to transmit the driving force to the auxiliary driving gears and the inner gears not in a one-way direction but continuously in both directions during the upward and downward pivots of the levers.
The second auxiliary propelling unit comprises: an outer gear mounted around the supporting shaft of the auxiliary driving gear connected to the inner gear and rotated at the same radius of rotation as that of the inner gear during the pivot of the lever; and an auxiliary propelling gear mounted around the driving shaft, having a ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the auxiliary driving gear, and engaged with the outer gear.
The inner gears are made into first outer gears, second outer gears are mounted around the supporting shafts to be engaged with and to be rotated by the first outer gears, and connecting gears are provided to the main body frame between the outer gears and the auxiliary propelling gears.
The inner gears associated with the levers and the outer gears of the second propelling unit are connected to conventional clutches provided between the levers and the main body frame so that the driving force is transmitted and cut off.
A bevel gear unit is provided on the driven shaft, a rotation shaft is coupled with a vertical bevel gear to be freely rotated by a frame (F) , and a propeller is mounted to the upper end of the rotation shaft.
BRIEF DESCRIPTION OF THE DRAWINGS
These and/or other objects and advantages of the present invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective view illustrating a power transmission of a land rowing machine according to an embodiment of the present invention;
FIG. 2 is a plan view schematically illustrating main parts of the power transmission of a land rowing machine in FIG. 1;
FIG. 3 is a schematic side sectional view illustrating the power transmission of a land rowing machine in FIG. 2;
FIG. 4 is a plan view illustrating main parts of a power transmission of a land rowing machine according to another embodiment of the present invention;
FIG. 5 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention;
FIG. 6 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention; FIG. 7 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention; and
FIG. 8 is an exploded perspective view schematically illustrating a conventional land rowing machine.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings . FIG. 1 is a perspective view illustrating a power transmission of a land rowing machine according to an embodiment of the present invention, FIG. 2 is a plan view schematically illustrating main parts of the power transmission of a land rowing machine in FIG. 1, and FIG. 3 is a schematic side sectional view illustrating the power transmission of a land rowing machine in FIG. 2.
As illustrated in the drawings, a land rowing machine 100 includes a driving gear 144 and a driven gear 146 mounted around a driving shaft 142 of a power transmitting unit 140 to be engaged with a rotation gear 132 mounted around a driven shaft 134 of a rear wheel unit 130 of a main body frame 110 and having a conventional one-way ratchet wheel (not shown) installed therein, a rack gear 152 provided on the lower side of a seat 150 to be reciprocated along a guide rail 154 and engaged with the driving gear, auxiliary driving gears 162 mounted on the lateral sides of the driving shaft and having conventional one-way ratchet wheels (not shown) installed therein, and supporting shafts 165 in which inner gears 164 and levers 160 engaged with the auxiliary gears 162 are formed to generate a propelling force.
The land rowing machine according to an embodiment of the present invention further includes, in order that the driving force is not transmitted in a one way direction but is continuously transmitted in both directions during the forward and backward rotation of the power transmitting unit, a first propelling unit 10 configured such that the driving force is not transmitted in one-way direction but is continuously transmitted in both directions when the seat 150 is reciprocated by the driven shaft 134 and the rack gear 152.
I The driving gear and the auxiliary driving gears are mounted to transmit the driving force in the same direction.
Preferably, the first propelling unit 10 includes an auxiliary driving gear 12 mounted around the driven shaft 134 and having a conventional one-way ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the driving gear 144 provided to the driving shaft 142, and an extended rack gear unit 14 extended from the rack gear and integrally formed with the rack gear to be engaged with the auxiliary driving gear. When a passenger pushes the seat backward, the driving force of the driving gear is transmitted to the rotation gear via the driven gear such that the driven shaft is rotated to generate the propelling force. At that time, the auxiliary driving gear is idled by the one-way ratchet wheels. Next, when the passenger pulls the seat forward, the driving gear is idled by the one-way ratchet wheels and the driving force of the auxiliary driving gear is transmitted by the ratchet wheels such that the driven shaft is rotated to generate the propelling force. By doing so, the driving force, which has been transmitted in the one-way direction during the reciprocation of the seat in the conventional power transmission, is transmitted in both directions, that is, in the forward and backward directions by the auxiliary driving gear and the extended rack gear, that is, the first propelling unit, so that larger propelling force can be generated.
Thus, since the driving force, which has been transmitted in the one-way direction during the forward and backward rotations of the power transmission due to the repeated reciprocation of the rack gear mounted on the lower side of the seat, is transmitted in both directions by the first propelling unit during the forward and backward rotations, the propelling force of the land rowing machine can be doubled. FIG. 4 is a plan view illustrating main parts of a power transmission of a land rowing machine according to another embodiment of the present invention.
As illustrated, as the propelling force is generated by the driving gear of the driving shaft and the rack gear together with the auxiliary driving gears and the inner gears that are provided at the lateral sides of the driving shaft, the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions during the upward and downward pivot of the levers. To this end, second propelling units 20 transmit the driving force to the auxiliary driving gears 162 and the inner gears 164 not in one-way direction but continuously in both directions during the upward and downward pivots of the levers 160. Each of the second propelling unit 20 preferably includes an outer gear 22 mounted around the supporting shaft 165 of the auxiliary driving gear 162 connected to the inner gear 164 and rotated at the same radius of rotation as that of the inner gear 164 during the pivot of the lever 160, and an auxiliary propelling gear 24 mounted around the driving shaft 142, having a ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the auxiliary driving gear 162, and engaged with the outer gear. By doing so, when the levers pivot upwardly, the inner gears rotate the auxiliary driving gears to transmit the driving force. Thus, the driving shaft is rotated to generate the propelling force. The auxiliary propelling gears 24 engaged with the outer gears of the second propelling unit connected to the levers to be pivoted are idled by the one-way ratchet wheels.
Moreover, when the levers pivot downwardly, the auxiliary driving gears, which are rotated by the inner gears, are idled by the one-way ratchet wheels, and the auxiliary propelling gears, which are rotated by the outer gears, receive the driving force due to the one-way ratchet wheels to rotate the driving shaft.
Thus, since the driving force, which is transmitted only in the one-way direction during the upward and downward pivots of the levers, is transmitted in both directions, the propelling force can be doubled in comparison to the propelling force transmitted by the conventional power transmission.
On the other hand, as described above, when the first and second propelling units are employed to transmit the driving force, in comparison to the propelling force generated due to the transmission of the driving force in the one-way direction during the upward and downward pivots of the levers in the conventional power transmission, double or greater propelling force can be obtained. In other words, the driving force is continuously transmitted in both directions during the reciprocation of the seat and during the upward and downward pivots of the levers so that double or greater propelling force can be obtained. FIG. 5 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
As illustrated in the drawing, since it is difficult to manufacture the inner gears engaged with the auxiliary driving gears, the inner gears have a simpler structure.
To this end, the inner gears are made to first outer gears 30, second outer gears 32 are mounted around the supporting shafts 165 to be engaged with and to be rotated by the first outer gears, and connecting gears 34 are provided to the main body frame between the outer gears 22 and the auxiliary propelling gears 24 to be freely rotated.
The outer gears and the second outer gears are coupled with the supporting shafts by spline couplers formed on the levers such that the outer gears and the second outer gears are smoothly rotated due to the upward and downward pivots of the levers during the upward and downward pivots of the levers .
By doing so, since the inner gears to rotate the auxiliary driving gears are substituted with a conventional type of outer gears without the complicated manufacturing thereof, the driving force, as described above, is transmitted in both directions due to the upward and downward pivots of the levers and the inner gears can be easily manufactured.
On the other hand, without the connecting gears positioned between the auxiliary propelling gears and the outer gears, the auxiliary gears are connected to the outer gears by conventional chains so that the driving force can be transmitted in the same manner as the disposing of the connecting gears. FIG. 6 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
As illustrated in the drawing, the land rowing machine can be carried and kept in custody by minimizing interference with the levers.
To this end, the inner gears 164 associated with the levers 160 and the outer gears 22 of the second propelling unit 20 are connected to conventional clutches 40 provided between the levers 160 and the main body frame 110 so that the driving force is transmitted and cut off.
Preferably, the clutches, like a claw clutch, contact to transmit the driving force to the supporting shafts only during the transmission of the driving force and is separated from the supporting shafts to cut off the driving force. In this embodiment of the present invention, as illustrated in the drawing, elastic members 42 such as a spring are disposed between the levers 160 and the main body frame 110 and fixing bars 44 formed to the levers are installed to be fixed to and to be released from hooks 46 formed in the main body frame 110. Due to this structure, the levers have supporting shafts as long as distances where the elastic members are shrunk and expanded such that the inner gears and the outer gears are separated from the auxiliary driving gears and the auxiliary propelling gears along the supporting shafts.
By doing so, when the land rowing machine is not used but is carried or kept in custody, the inner and outer gears engaged with the auxiliary driving gears and the auxiliary propelling gears by the clutches are separated therefrom to prevent the transmission of the driving force and only the levers are folded into the front side of the main body frame, so that the interference with the levers can be minimized.
FIG. 7 is a schematic view illustrating main parts of a power transmission of a land rowing machine according to still another embodiment of the present invention.
As illustrated in the drawings, since the propelling force of the land rowing machine can be maximized, in order to use the land rowing machine more effectively, a bevel gear unit 50 is provided on the driven shaft 134 and having horizontal and vertical bevel gears 52 and 54, such as conventional linear bevel gears, to be engaged with each other, a rotation shaft 55 is coupled with the vertical bevel gear 54 and fixed to the main body frame 110 to be freely rotated by a conventional frame F, and a conventional propeller 56 is mounted to the upper end of the rotation shaft 55.
The rotation shaft, which is mounted to the main body frame to be freely rotated by the frame, is preferably mounted to be supported and to be freely rotated by a conventional bearing installed in the end of the frame contacting the rotation shaft. As well, the end of the frame where the opposite end of the rotation shaft is positioned is preferably mounted to the main body frame without vibration by welding or a screw. By doing so, in a case when a structure such as a glider
(not shown) is installed to the main body frame, due to the propeller mounted to the rotation shaft and the glider (not shown) installed in the main body frame, the land rowing machine can not fly for a long distance but for a short distance using the high propelling force of the first propelling unit and the second propelling unit.
As described above, according to the present invention, the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions by the first propelling unit during the power transmission of the land rowing machine, so that the propelling force is doubled.
Moreover, since the power transmission efficiency is maximized by the second propelling unit during the pivot of the levers, the propelling force of the land rowing machine can be maximized in association with the first propelling unit .
Since the levers can be folded into the front side due to the clutches to transmit and cut off the driving force when the land rowing machine is carried or kept in custody, the interference by the levers can be minimized.
Furthermore, since the power transmission of the land rowing machine includes the auxiliary driving unit to transmit the driving force such that the propelling force can be maximized, the land rowing machine can be used as a traveling device as occasion demands.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims .

Claims

WHAT IS CLAIMED IS:
1. In a land rowing machine comprising: a driving gear and a driven gear mounted around a driving shaft of a power transmitting unit to be engaged with a rotation gear mounted around a driven shaft of a rear wheel unit of a main body frame and having a conventional one-way ratchet wheel installed therein, a rack gear provided on the lower side of a seat to be reciprocated along a guide rail and engaged with the driving gear, auxiliary driving gears mounted on the lateral sides of the driving shaft and having conventional one-way ratchet wheels installed therein, and supporting shafts in which inner gears and levers engaged with the auxiliary gears are formed to generate a propelling force, a power transmission comprising: a first propelling unit configured such that the driving force is not transmitted in a one-way direction but is continuously transmitted in both directions when the seat is reciprocated by the driven shaft and the rack gear.
2. The power transmission of a land rowing machine according to claim 1, wherein the first propelling unit comprises : an auxiliary driving gear mounted around the driven shaft and having a one-way ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the driving gear provided to the driving shaft; and an extended rack gear unit extended from the rack gear and integrally formed with the rack gear to be engaged with the auxiliary driving gear.
3. The power transmission of a land rowing machine according to claim 1, further comprising a second propelling unit to transmit the driving force to the auxiliary driving gears and the inner gears not in a one-way direction but continuously in both directions during the upward and downward pivots of the levers.
4. The power transmission of a land rowing machine according to claim 3, wherein the second auxiliary propelling unit comprises: an outer gear mounted around the supporting shaft of the auxiliary driving gear connected to the inner gear and rotated at the same radius of rotation as that of the inner gear during the pivot of the lever; and an auxiliary propelling gear mounted around the driving shaft, having a ratchet wheel to transmit the driving force in the direction opposite to that of the one-way ratchet wheel of the auxiliary driving gear, and engaged with the outer gear.
5. The power transmission of a land rowing machine according to claims 1 or 4, wherein the inner gears are made into first outer gears, second outer gears are mounted around the supporting shafts to be engaged with and to be rotated by the first outer gears, and connecting gears are provided to the main body frame between the outer gears and the auxiliary propelling gears.
6. The power transmission of a land rowing machine according to claim 4, wherein the inner gears associated with the levers and the outer gears of the second propelling unit are connected to conventional clutches provided between the levers and the main body frame so that the driving force is transmitted and cut off.
7. The power transmission of a land rowing machine according to any one of claims 1 to 4, wherein a bevel gear unit is provided on the driven shaft, a. rotation shaft is coupled with a vertical bevel gear to be freely rotated by a frame (F) , and a propeller is mounted to the upper end of the rotation shaft.
PCT/KR2007/002393 2006-05-17 2007-05-16 Power transmission of land rowing machine WO2007133046A1 (en)

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KR1020060044333A KR100670243B1 (en) 2006-05-17 2006-05-17 Transmission for land-row device

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103538679A (en) * 2012-07-12 2014-01-29 吴晓东 Driving device and bicycle with same
WO2015025990A1 (en) * 2013-08-22 2015-02-26 Muchuma Thaddaeus Lebanon Aeropedalplane (cycling aircraft)
CN110979539A (en) * 2019-12-31 2020-04-10 马奔光 Labor-saving simple children's three-wheeled toy car
US10752317B1 (en) 2018-07-03 2020-08-25 Bill B. Jones Leg and arm powered vehicle
WO2021161086A1 (en) * 2020-09-15 2021-08-19 Cordeiro Marcelo Manually powered drivetrain system with cushioned levers

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US4632414A (en) * 1984-06-22 1986-12-30 Ellefson Mark W Land vehicle propelled by simulated rowing motion
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JPH04243681A (en) * 1991-01-23 1992-08-31 Shizuo Ishii Manually rowing type passenger vehicle
US5536029A (en) * 1995-03-13 1996-07-16 Gramckow; Jurgen Rowing powered cycle

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KR100721568B1 (en) * 2004-05-21 2007-05-23 이길성 Apparatus for Land Rowing with Hand Lever

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US4126329A (en) * 1977-06-21 1978-11-21 Tchernyak Shimon S Wheeled vehicle with oar-type propulsion
US4632414A (en) * 1984-06-22 1986-12-30 Ellefson Mark W Land vehicle propelled by simulated rowing motion
US4976451A (en) * 1988-08-24 1990-12-11 Kamenov Kamen G Human powered vehicle
JPH04243681A (en) * 1991-01-23 1992-08-31 Shizuo Ishii Manually rowing type passenger vehicle
US5536029A (en) * 1995-03-13 1996-07-16 Gramckow; Jurgen Rowing powered cycle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103538679A (en) * 2012-07-12 2014-01-29 吴晓东 Driving device and bicycle with same
WO2015025990A1 (en) * 2013-08-22 2015-02-26 Muchuma Thaddaeus Lebanon Aeropedalplane (cycling aircraft)
US10752317B1 (en) 2018-07-03 2020-08-25 Bill B. Jones Leg and arm powered vehicle
CN110979539A (en) * 2019-12-31 2020-04-10 马奔光 Labor-saving simple children's three-wheeled toy car
WO2021161086A1 (en) * 2020-09-15 2021-08-19 Cordeiro Marcelo Manually powered drivetrain system with cushioned levers

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