Bicycles driven by front wheel and rear wheel

Abstract

The present invention relates to a bicycle in which a front wheel is installed at the lower part of a front steering frame and a rear wheel is installed at the rear of a main frame having a saddle installed at the upper part, and a foot pedal rotatably coupled to the lower part of the main frame drives the rear wheel through a pair of sprockets and a chain, comprising: a pair of handlebars rotatably connected to both ends of a handle shaft installed in both directions on the upper part of the steering frame by a shaft connecting part so as to move in the up and down direction, and a hand pedal including a handle grip connected perpendicularly to the handlebars at the rear end of the handlebars; and a pair of circular discs coupled to both sides of a front wheel shaft installed in the center of the front wheel and rotating together with the front wheel in conjunction with the movement of a link member. The present invention provides a front-wheel and rear-wheel drive bicycle characterized by including a pair of link members, wherein the upper portion is rotatably connected to the front portion of the handlebar by an upper link portion and the lower portion is rotatably connected to the edge of the disc by a lower link portion, and the link members move up and down in conjunction with the operation of the hand pedal, wherein as the pair of handlebars are moved in the up and down direction so as to cross each other, linear motion is converted into rotational motion through the link members connected to the hand pedal and the disc, thereby driving the front wheel in rotation.

Description

Technology Field

[0001] The present invention relates to a bicycle, and more specifically, to a front-wheel and rear-wheel drive bicycle capable of rotating the front wheel and the rear wheel simultaneously or separately. Background Technology

[0003] A typical bicycle is configured as a rear-wheel drive system. That is, when a user pedals with their legs, a sprocket connected to the pedal rotates, and the rotation of the sprocket drives the rear wheel connected by a chain, causing the bicycle to move. The direction can be changed by rotating the steering handle installed on the front wheel to turn the front wheel left or right.

[0004] As a result, since the bicycle is driven solely by leg strength, only the user's lower body muscles develop, making it difficult to expect a full-body workout, and the legs and feet quickly become fatigued. Additionally, riding the bicycle may not be smooth on inclines or when carrying heavy loads.

[0005] To solve this problem, Patent Document 1 discloses a front wheel auxiliary drive device for a bicycle in which a gear shaft is installed horizontally on the upper side of a fork shaft that extends toward the upper side of a fork to which a front wheel hub is coupled, a hand pedal gear is installed, crank-type hand pedals are formed extending from the gear shaft on both sides of the hand pedal gear, a steering handle is formed coaxially with the gear shaft at the end of the hand pedal, and a front wheel drive gear is installed on the front wheel hub and connected to the hand pedal gear by a chain so that the front wheel can be driven forward by hand.

[0006] However, the aforementioned conventional technology has problems such as complex configuration and poor operation due to the use of sprockets and chains for the hand pedal, the need to repeatedly rotate the hand pedal in a circular motion like a foot pedal, resulting in large and unnatural arm movements and requiring a lot of arm strength, and the possibility of the cable of the brake lever mounted together with the hand pedal getting twisted or damaged. Prior art literature

[0008] Republic of Korea Registered Utility Model Publication No. 20-0305749 (Published July 7, 2003) The problem to be solved

[0009] The purpose of the present invention is to provide a front-wheel and rear-wheel drive bicycle with enhanced user convenience, in which linear motion is converted into rotational motion through a link member and a disc connected to the hand pedals as a pair of hand pedals are repeatedly moved in an up-and-down direction so as to cross each other, thereby driving the front wheel in rotation; thereby enabling a simple configuration, easy operation with minimal force, a small range of motion for the arms, natural arm movements, and the ability to drive the front and rear wheels simultaneously or separately, allowing for energy management by driving with the hands when the legs are tired and driving with the legs when the hands are tired; enabling full-body aerobic exercise; and allowing smooth riding even on inclined hills or when carrying heavy loads. means of solving the problem

[0011] The present invention relates to a bicycle in which a front wheel is installed at the lower part of a front steering frame and a rear wheel is installed at the rear of a main frame having a saddle installed at the upper part, and a foot pedal rotatably coupled to the lower part of the main frame drives the rear wheel through a pair of sprockets and a chain, comprising: a pair of handlebars rotatably connected to both ends of a handle shaft installed in both directions on the upper part of the steering frame by a shaft connecting part so as to move in the up and down direction, and a hand pedal including a handle grip connected perpendicularly to the handlebars at the rear end of the handlebars; and a pair of circular discs coupled to both sides of a front wheel shaft installed in the center of the front wheel and rotating together with the front wheel in conjunction with the movement of a link member. The present invention provides a front-wheel and rear-wheel drive bicycle characterized by including a pair of link members, wherein the upper portion is rotatably connected to the front portion of the handlebar by an upper link portion and the lower portion is rotatably connected to the edge of the disc by a lower link portion, and the link members move up and down in conjunction with the operation of the hand pedal, wherein as the pair of handlebars are moved in the up and down direction so as to cross each other, linear motion is converted into rotational motion through the link members connected to the hand pedal and the disc, thereby driving the front wheel in rotation. Effects of the invention

[0013] According to the present invention, as a pair of hand pedals are repeatedly moved in an up-and-down direction so as to cross each other, linear motion is converted into rotational motion through a link member and a disc connected to the hand pedals, thereby driving the front wheel in rotation. Consequently, the configuration is not complex, operation is easy with minimal force, the range of motion of the arms is small and natural, and the front and rear wheels can be driven in rotation simultaneously or separately, allowing for energy management by driving with the hands when the legs are tired and driving with the legs when the hands are tired. Furthermore, full-body aerobic exercise is possible, smooth driving is possible even on inclined hills or when carrying heavy loads, and user convenience is enhanced. Brief explanation of the drawing

[0015] FIG. 1 is a front view of a front-wheel and rear-wheel drive bicycle according to an embodiment of the present invention. FIG. 2 is a side view of a front-wheel and rear-wheel drive bicycle according to an embodiment of the present invention. FIG. 3 is a plan view of a front-wheel and rear-wheel drive bicycle according to an embodiment of the present invention. FIG. 4 is a diagram showing the front wheel drive of a front-wheel and rear-wheel drive bicycle according to an embodiment of the present invention. FIG. 5a is a drawing illustrating the shaft connection part, FIG. 5b is a drawing illustrating the upper link part, and FIG. 5c is a drawing illustrating the lower link part. Specific details for implementing the invention

[0016] Hereinafter, with reference to the drawings, specific details for implementing a front-wheel and rear-wheel drive bicycle according to the present invention will be described in detail, focusing on embodiments.

[0017] In addition, in the present invention, the side where the front wheels are installed is referred to as the front, and the side where the rear wheels are installed is referred to as the rear.

[0018] Referring to FIGS. 1 to 3, the front and rear wheel drive bicycle (1) according to the present invention is capable of rotating the front wheel and the rear wheel simultaneously or separately. It comprises a main frame (10) formed by connecting several frames of the bicycle, a frame connecting tube (20) provided at the front of the main frame (10) and connecting the main frame (10) and the steering frame (30) together, a steering frame (30) formed by penetrating the frame connecting tube (20) in the vertical direction and having a handle shaft (35) arranged in both directions on the upper side in a direction perpendicular to the steering frame (30), a front wheel (40) installed at the lower part of the steering frame, a rear wheel (50) installed at the rear lower part of the main frame (10), a saddle (60) installed at the upper part of the main frame (10), a foot pedal (70) rotatably coupled to the lower part of the main frame (10), and a pair of components installed at the lower part of the main frame (10) that rotate the rear wheel (50) by the rotational operation of the foot pedal (70). It can be made including a sprocket (80) and a chain (90).

[0019] In addition, a hand pedal (100) that is operated by hand is connected and installed on the handle shaft (35) on the upper part of the steering frame (30).

[0020] The above hand pedal (100) is formed such that a pair of handlebars (110) are connected in an orthogonal direction to both ends of a handle shaft (35) on the upper part of the steering frame (30). The handlebars (110) are formed to extend in the longitudinal direction with a predetermined length and have an insertion protrusion (115) formed at the front end. The center of the handlebars (110) is connected to the handle shaft (35) and the shaft connection part (120) so that they can rotate. When a user applies force in the up-and-down direction, the handlebars (110) can rotate up and down like a seesaw with the handle shaft (35) as the axis. A handle handle (130) is connected to the rear end of the handlebars (110) in an orthogonal direction to the handlebars (110). The handle handles (130) are installed such that the first handle handle (131) on the left and the second handle handle (132) on the right move in opposite directions relative to FIG. 1. The user [can use] both sides You can hold the handle handle (130) and move the pair of handle bars (110) over each other like a seesaw, moving it up and down with the handle shaft (35) as the axis.

[0021] The above hand pedal (100) has a brake lever (140) installed on the handle handle (130) and can be connected to the brake (not shown) of the front wheel (40) or rear wheel (50) via a cable (not shown).

[0022] At this time, referring to FIG. 5a, the shaft connecting part (120) has an insertion protrusion (115) provided at the front end of the handle shaft (35) inserted into a fastening hole (not shown) formed at the center of the handle bar (110), and a bearing (121) is installed in the remaining space of the fastening hole outside the insertion protrusion (115) of the inserted handle shaft (35), and the handle shaft (35) is fixedly fastened to the handle bar (110) with a fixing member (122) on one side, so that smooth rotational movement of the handle bar (110) is possible.

[0023] In addition, a pair of circular discs (200) are attached to both sides of a front wheel axle (45) installed in the center of the front wheel (40), and rotate together with the front wheel (40) in conjunction with the movement of a link member (300) to be described later.

[0024] The upper part of the link member (300) is rotatably connected to the insertion protrusion (115) of the front end of the handlebar (110) by the upper link part (310), and the lower part is rotatably connected to the edge of the disk (200) by the lower link part (320), and moves up and down in conjunction with the operation of the hand pedal (100).

[0025] At this time, when the link member on the left side is referred to as the first link member (301) based on FIG. 1, the disk to which the lower end of the first link member (301) is connected is referred to as the first disk (201), the link member on the right side is referred to as the second link member (302), and the disk to which the lower end of the second link member (302) is connected is referred to as the second disk (202), the connection portion between the first link member (301) and the first disk (201) and the connection portion between the second link member (302) and the second disk (202) are formed at positions symmetrical to each other and rotate in a symmetrical state.

[0026] Therefore, when the user moves a pair of handlebars (110) in an up-and-down direction so that they cross each other, the linear motion is converted into rotational motion through the link member (300) and the disc (200) connected to the hand pedal (100), and the front wheel (40) is driven to rotate.

[0027] That is, when the handle bar to which the upper part of the first link member (301) is connected is referred to as the first handle bar (111) and the handle bar to which the upper part of the second link member (302) is connected is referred to as the second handle bar (112), if a user holds both handle handles (140) with both hands and repeatedly applies force in the up and down direction, the first and second handle bars (111, 112) move up and down around the handle shaft (35), and the first and second link members (301, 302) also move in conjunction in the up and down direction, and accordingly, the first and second discs (201, 202) rotate, and the front wheel (40) is driven to rotate.

[0028] For example, as shown in FIG. 1, when the first handle (131) on the left is lowered and the second handle (132) on the right is raised, the front end of the first handle bar (111) moves upward due to the seesaw motion, causing the first link member (301) to rise, and accordingly, the connection part between the first link member (301) and the first disk (201) moves upward. On the other hand, the front end of the second handle bar (112) moves downward due to the seesaw motion, causing the second link member (302) to descend, and accordingly, the connection part between the second link member (302) and the second disk (202) moves downward. In this way, if the user repeatedly moves the pair of handle bars (110) in the up and down direction so that they cross each other, the connection parts of the link members (300) and the disk (200) on both sides move in a symmetrical state as shown in FIG. 4. A rotational force is applied to the front axle (45), causing the front wheel (40) to rotate.

[0029] Accordingly, as a pair of hand pedals (100) are repeatedly moved in an up-and-down direction so as to cross each other, linear motion is converted into rotational motion through the link member (300) and the disc (200) connected to the hand pedals (100), thereby driving the front wheel (40) in rotation. This allows for easy operation with minimal force, a small range of motion for the arms, and natural arm movements. Additionally, the front wheel (40) and the rear wheel (50) can be driven in rotation simultaneously or separately, allowing for driving with the hands when the legs are tired and driving with the legs when the hands are tired, thereby conserving energy. Furthermore, full-body aerobic exercise is possible, and smooth driving is possible even on inclined hills or when carrying heavy loads.

[0030] In addition, referring to FIG. 5b, the upper link portion (310) has a connecting groove (311) formed at the upper end of the link member (300), and an insertion protrusion (115) provided at the front end of the handle bar (110) is inserted into the connecting groove (311) with a predetermined clearance, and a fastening pin (312) penetrates the insertion protrusion (115) of the handle bar (110) inserted into the connecting groove (311) in an orthogonal direction and is fastened to the link member (300), thereby enabling smooth rotation between the handle bar (110) and the link member (300) that move in conjunction with each other.

[0031] Additionally, referring to FIG. 5c, the link member (300) has a stepped portion (321) formed at the bottom, and a coupling hole (not shown) is formed in the stepped portion (321). The bottom link member (320) has a support shaft (322) fastened to the edge of the disk (20) and inserted into the coupling hole of the link member (300). A bearing (323) is installed in the remaining space of the coupling hole outside the support shaft (322), and the support shaft (322) is fixedly fastened to the link member (300) with a fixing member (324) on one side, thereby enabling smooth rotation of the link member (300).

[0032] Ultimately, the front and rear wheel drive bicycle (1) of the present invention has the effect of increasing user convenience by converting linear motion into rotational motion through a link member and a disc connected to the hand pedals as a pair of hand pedals are repeatedly moved in an up-and-down direction so as to cross each other, thereby driving the front wheel in rotation. This allows for a simple configuration, easy operation with minimal force, a small range of motion for the arms, natural arm movements, and the ability to drive the front and rear wheels simultaneously or separately, enabling the user to drive with their hands when their legs are tired and drive with their legs when their hands are tired, allowing for full-body aerobic exercise, smooth riding even on inclined hills or when carrying heavy loads.

[0033] The above embodiments in the present invention are merely examples, and the present invention is not limited thereto. Any configuration having substantially the same structure as the technical concept described in the claims of the present invention and achieving the same functional effect is included within the technical scope of the present invention. Explanation of the symbols

[0035] 1. Bicycle 10. Mainframe 20. Frame connecting pipe 30. Steering frame 35. Steering axle 40. Front wheel 45. Front axle 50. Rear axle 60. Saddle 70. Foot pedal 80. Sprocket 90. Chain 100. Hand pedals 110. Handlebars 111. First handlebar 112. Second handlebar 115. Insertion protrusion 120. Shaft connection part 121. Bearing 122. Fixing member 130. Handle grip 131. First handle grip 132. Second handle grip 140. Brake lever 200. Disk 201. First Disk 202. Second Disk 300. Link Absence 301. First link member 302. Second link member 310. Top Link Section 311. Connection Home 312. Fastening pin 320. Lower link part 321. Step section 322. Support shaft 323. Bearing 324. Fixing member

Claims

Claim 1 A bicycle comprising a front wheel installed at the lower part of a front steering frame and a rear wheel installed at the rear of a main frame having a saddle installed at the upper part, wherein a foot pedal rotatably coupled to the lower part of the main frame drives the rear wheel through a pair of sprockets and a chain, and comprising: a pair of handlebars rotatably connected to both ends of a handle shaft installed in both directions on the upper part of the steering frame by a shaft connecting part so as to move in the up and down direction, and a hand pedal including a handle grip connected perpendicularly to the handlebars at the rear end of the handlebars; and a pair of circular discs coupled to both sides of a front wheel shaft installed in the center of the front wheel and rotating together with the front wheel in conjunction with the movement of a link member. A front-wheel and rear-wheel drive bicycle in which the front wheel is driven by rotation through a link member and a disc connected to a hand pedal, wherein the upper portion is rotatably connected to the front portion of the handlebar by an upper link portion, and the lower portion is rotatably connected to the edge of the disc by a lower link portion, and includes a pair of link members that move up and down in conjunction with the operation of the hand pedal, wherein as the pair of handlebars move up and down so as to cross each other, linear motion is converted into rotational motion through the link member and the disc connected to the hand pedal, thereby driving the front wheel by rotation, wherein the handlebars are formed to have a predetermined length and extend in the longitudinal direction, and the user can move the pair of handlebars up and down like a seesaw by holding both handle handles and operating them to cross each other, and the handle handles are installed so as to move in opposite directions, and the connecting portions where the lower portions of each of the link members are connected to the disc are formed at positions symmetrical to each other with respect to the center of the disc and rotate in a symmetrical state so as to facilitate operation. Claim 2 In claim 1, a front-wheel and rear-wheel drive bicycle in which the front wheel is rotated through a link member and a disc connected to the hand pedal, characterized in that the hand pedal has a brake lever installed on the handle handle. Claim 3 A front-wheel and rear-wheel drive bicycle in which the front wheel is rotated through a link member and a disc connected to a hand pedal, characterized in that, in claim 1, the shaft connecting member is formed such that the end of the handle shaft is inserted into a fastening hole formed at the center of the handle bar, a bearing is installed on the outer side of the inserted end of the handle shaft, and the handle shaft is fixedly fastened to the handle bar by a fixing member. Claim 4 In claim 1, the upper link portion comprises a connecting groove formed at the upper portion of the link member and into which the front end of the handlebar is inserted with a predetermined clearance, and a fastening pin connected to a hand pedal and a link member and a disc through which the front wheel is rotated and driven. Claim 5 A front-wheel and rear-wheel drive bicycle in which the front wheel is rotated through a link member connected to a hand pedal and a disc, wherein the link member has a stepped portion formed at the lower end and a coupling hole formed in the stepped portion, and the lower link member includes a support shaft fastened to the edge of the disc and inserted into the coupling hole of the link member, a bearing installed on the outer side of the support shaft, and a fixing member that fixes the support shaft to the link member. Claim 6 delete Claim 7 delete

Images