KR102790674B1 - rear wheel steer recumbent bike - Google Patents

Abstract

The present invention relates to a rear-wheel steering recumbent bicycle, and more specifically, to a rear-wheel steering recumbent bicycle in which a rider is driven in a posture leaning on the seat, while being able to adjust the rear-wheel steering sensitivity, secure a wide field of vision while driving, and improve the driving performance. To this end, the present invention comprises: a main frame to which a front wheel is coupled and a seat is disposed on the upper side; a steering frame to which a rear wheel is coupled and having a steering handle for changing direction; a steering means disposed between the main frame and the steering frame to support the rotation of the steering frame; and a driving means for providing power for movement. The steering means is characterized in that it includes a steering body in which a steering frame insertion hole into which the steering frame is rotatably coupled is formed, an axle arrangement portion formed in a direction perpendicular to the longitudinal direction of the steering body, and a steering shaft formed in the shape of a rod extending in the longitudinal direction and disposed in the axle arrangement portion.

Description

rear wheel steer recumbent bike

The present invention relates to a rear-wheel steering recumbent bicycle, and more specifically, to a rear-wheel steering recumbent bicycle that allows a rider to ride with a seated posture, while being able to adjust the rear-wheel steering sensitivity, secure a wide field of vision while riding, and minimize saddle pain for the rider during long-distance riding.

As is known, a recumbent bicycle is a bicycle that is ridden with the rider's back leaning against the seat or lying down, as the word "recumbent" or "lying down" suggests. Its design is unique and gives a fresh feeling compared to existing bicycles.

The above recumbent bicycle allows the user to pedal in a comfortable position, lying on their back (laid back), making it suitable for long-distance riding, and because it has less air resistance than conventional bicycles, it can provide a faster riding speed than conventional bicycles. In addition to recumbent, recumbent bicycles are also called recliners, comfort bikes, and bents.

These recumbent bicycles are broadly divided into two-wheeled recumbent bicycles with one front wheel and one rear wheel, and three-wheeled recumbent bicycles with two front wheels and one rear wheel.

The above two-wheeled recumbent bicycle, like a conventional bicycle, has the problem of falling to the side if it is not continuously driven by pedaling or not steered by the handlebars, making it less safe to ride in the case of a recumbent type bicycle that requires leaning backwards, and causing anxiety in the rider.

For example, the technology proposed in Korean Patent Publication No. 10-2008-0000002 (published on January 2, 2008) relates to a ‘recumbent bicycle’, and requires continuous pedaling and steering to prevent it from falling over to the side.

In addition, since the above-mentioned conventional technology is a front-wheel steering method in which the steering handle for steering turns the front wheel, there was a problem that the bicycle flipped forward or fell to the side when the brake was applied. In particular, in the case of a recumbent bicycle in which the center of gravity is distributed over a wide area toward the rear, there was a problem that the rider was forced to move forward when the brake was applied, causing the rider to fall off the seat.

Meanwhile, looking at the technology proposed for a rear-wheel steering recumbent bicycle, there is a technology proposed in Korean Patent No. 10-1881518 (registered on July 18, 2018), and the prior art relates to a ‘rear-wheel steering recumbent bicycle.’

This prior art includes a main frame having a seat on the upper side, a rear frame connected to the rear of the main frame so as to be angle-adjustable in the horizontal direction and having rear wheels rotatably coupled to both ends thereof, a steering device provided at a connection portion of the main frame and the rear frame so as to allow the rear frame to be angle-adjusted with respect to the main frame, a steering handle provided on both sides of the rear frame so as to control a horizontal rotation angle of the rear frame depending on whether it is operated, and a front frame connected to the front of the main frame, having a front wheel directly rotated by a pedal at the lower side and having a first sprocket mounted on one side thereof, and a second sprocket selectively connected to the first sprocket by a chain at the upper side.

The conventional technology as described above has two rear wheels positioned at mutually separated positions, which can provide driving stability, but the turning radius inevitably becomes larger, so the turning motion performance is bound to decrease, and since only the front wheels are driven, losses occur in the process of generating and transmitting driving force, which has the problem of lowering driving performance.

Republic of Korea Publication Patent No. 10-2008-0000002 (Published on January 2, 2008) Republic of Korea Patent No. 10-1881518 (registered on July 18, 2018)

The present invention has been proposed to solve the above problems, and has the purpose of providing a rear-wheel steering recumbent bicycle in which a rider can control the direction of movement by steering the rear wheel while riding a recumbent bicycle while leaning backward or lying down.

In addition, the present invention aims to provide a rear-wheel steering recumbent bicycle that can improve driving convenience when riding uphill by preventing loss of power generated through pedaling and thus improving maneuverability, and in which a rider can easily secure a field of vision in the driving direction by leaning backward or lying down while riding.

In addition, the present invention aims to provide a rear-wheel steering recumbent bicycle that prevents pain that occurs when riding a long distance while sitting on the seat of an existing bicycle, thereby improving convenience by not causing pain to the rider even when riding a long distance.

In addition, the present invention aims to provide a rear-wheel steering recumbent bicycle that simultaneously drives both the front and rear wheels by transmitting power generated through pedaling to resolve the difficulty of uphill driving on a slope due to the center of gravity being distributed over a wide area depending on the riding posture of the rider, and at this time improves uphill driving performance by controlling the rotation ratio of the front and rear wheels.

In order to achieve the above purpose, the present invention,

A main frame to which the front wheels are connected and on which the seats are placed on the upper side;

A steering frame having a rear wheel assembly and a steering handle for turning;

A steering means disposed between the main frame and the steering frame to support rotation of the steering frame;

A driving means for providing power for movement;

The above steering means,

A steering body having a steering frame insert hole formed so that the steering frame can be rotatably connected,

An axle arrangement formed in a direction perpendicular to the longitudinal direction of the above steering body,

It is characterized by having a rod shape extending in the longitudinal direction and including a steering shaft arranged in the axle arrangement section.

In addition, the steering means is characterized in that it further includes a rotation interference prevention means for preventing mutual interference between the steering frame and the steering shaft when they rotate.

At this time, the rotation interference prevention means is characterized by including a pair of rotating holes formed along the outer surface of the steering frame, each formed symmetrically to one another, and in which the steering shaft is rotatably arranged.

In addition, it includes a driving gear arranged on the front wheel, a pedal connected to the driving gear via a crank arm, a driven gear arranged on the other side of the main frame in the longitudinal direction, a power transmission means configured as an endless type to connect the driving gear and the driven gear, a link gear with which the driven gear meshes, a transmission gear meshes with the link gear, a rear wheel gear arranged on the rear wheel, and a rear wheel chain configured as an endless type to connect the transmission gear and the rear wheel gear.

At this time, the driven gear and the transmission gear are characterized in that they mesh with the link gear in a direction perpendicular to the link gear.

In addition, the driven gear and the transmission gear are characterized in that they mesh with the link gear in a direction perpendicular to the link gear, and the driven gear meshes with the upper surface of the link gear and the transmission gear meshes with the lower surface of the link gear.

In addition, the link gear is characterized in that a through hole is formed in the center into which the steering frame is inserted and an inner bearing is arranged to support the rotation of the abutting steering frame, and a chain groove is formed radially along the outer surface to engage the drive gear or the transmission gear.

In addition, the main frame is further provided with a bottom bracket to which the driving means is coupled, wherein the bottom bracket includes a power transmission shaft that is coupled to the driving means and rotates by the generated power, a hub that surrounds and couples the power transmission shaft, a pair of bearings arranged on each side of the hub in the longitudinal direction, a disc brake coupled to the power transmission shaft, and a ratchet module for controlling the rotational direction of the front wheel.

At this time, the ratchet module includes an inner body to which the power transmission shaft is coupled, and an outer body to which the hub is coupled, and the inner body is provided with a ratchet that is rotatably arranged in the outer body and restricts the rotational direction of the power transmission shaft to one direction, and the power transmission shaft is further provided with a ratchet wheel whose rotational direction is restricted by the ratchet, thereby restricting the rotational direction of the power transmission shaft.

In addition, the main frame is characterized in that a pair of front wheels are coupled at mutually spaced positions, and a foot steering frame is provided for steering the direction of movement of the front wheels.

In addition, the foot steering frame is characterized by including a front wheel coupling part to which the pair of front wheels are respectively coupled, and a steering pedal that controls the movement direction of the pair of front wheels by rotating the pair of front wheels in conjunction.

The present invention, which is constructed as described above, provides a seat that supports the buttocks and back of a passenger, thereby improving the seating comfort of the passenger even during long-distance driving and reducing pain occurring in the buttocks or groin area.

In addition, the present invention has the effect of improving rear wheel steering sensitivity and enabling passengers to secure a wider field of vision to check the front while driving, thereby increasing safety during driving.

In addition, the present invention solves the problem that the power required for uphill driving is greater than that of a regular bicycle due to the characteristics of a recumbent bicycle in which the center of gravity is distributed over a wide area, by transmitting the power generated through pedaling to both the front and rear wheels and controlling the rotation ratio of the front and rear wheels, thereby improving the mobility of uphill driving.

FIG. 1 is an exemplary drawing showing an embodiment of a rear-wheel steering recumbent bicycle according to the present invention.
FIG. 2 is an exemplary drawing showing a rear-wheel steering recumbent bicycle according to the present invention from a different angle.
FIG. 3 is an exemplary drawing showing another embodiment of a rear-wheel steering recumbent bicycle according to the present invention.
Figure 4 is an exemplary diagram illustrating a mainframe constituting the present invention.
Figure 5 is an exemplary diagram illustrating a steering frame constituting the present invention.
Figure 6 is an exemplary diagram illustrating a steering means constituting the present invention.
Figure 7 is a state diagram showing the operating state of the steering means constituting the present invention.
Figure 8 is an exemplary diagram illustrating a driving means constituting the present invention.
Figure 9 is an exemplary diagram illustrating a link gear constituting the present invention.
Fig. 10 is an exemplary diagram showing another embodiment of a driving means constituting the present invention.
Figure 11 is an exemplary drawing showing a bottom bracket constituting the present invention.
Figure 12 is an exemplary diagram showing the operating state of a ratchet module constituting the present invention.

Hereinafter, other purposes and features of the present invention in addition to the above will be clearly revealed through a description of embodiments with reference to the attached drawings.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries, such as those defined in common dictionaries, should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

Hereinafter, a preferred embodiment of a rear-wheel steering recumbent bicycle according to the present invention will be described with reference to the attached drawings.

First, a rear-wheel steering recumbent bicycle (1) according to one embodiment of the present invention, as illustrated in FIG. 1, includes a main frame (30) to which a front wheel (10) is coupled and a seat (35) is arranged on the upper side, a steering frame (40) to which a rear wheel (20) is coupled and which is provided with a steering handle (41) for changing direction, a steering means (50) arranged between the main frame (30) and the steering frame (40) to support rotation of the steering frame (40), and a driving means (60) for providing power for movement.

The above main frame (30) constitutes the frame of the bicycle and supports the weight and driving pressure of the rider. The main frame (30) may be made of any one of steel, aluminum, carbon fiber, and titanium. Of course, it may be manufactured using various materials such as magnesium, bamboo, and synthetic resin, but it is formed using any one of the above-mentioned iron, aluminum, carbon, and titanium as the main material.

A front wheel (10) is coupled to one longitudinal side of the main frame (30) according to the present invention, and a seat (35) on which a passenger sits is arranged on the other longitudinal side.

And, a bottom bracket (70) described later is placed on the main frame (30), and a front wheel (10) is connected to the bottom bracket (70). The detailed structure of the bottom bracket (70) will be described later.

Looking at the structure of the main frame (30) illustrated in FIG. 1 in more detail, it includes a pair of support bars (31) extending in the longitudinal direction, a pair of inclined bars (32) extending in the longitudinal direction and having one longitudinal end connected to one longitudinal end of the support bars (31) and the other longitudinal end arranged obliquely so as to be arranged relatively downward compared to the support bars (31), a bottom body (33) connecting the support bars (31) and the inclined bars (32) and to which a bottom bracket (70) described below is coupled, and a reinforcing bar (34) connecting the pair of support bars (31) or the pair of inclined bars (32).

The length of a pair of support bars (31) and a pair of inclined bars (32) formed as described above, the distance therebetween, and the angle of inclination of the inclined bars (32) can be changed according to the length of the entire bicycle, the distance between the front and rear wheels, or the wheel size of the front wheel, and are of course not limited to the form illustrated in the drawing.

The above steering frame (40) is formed by combining the rear wheel (20) and having a steering handle (41) for changing direction. It is preferably formed of the same material as the material forming the main frame (30) described above, but is formed of a material that is light in weight but can ensure rigidity. For example, it may be formed of either carbon or titanium, but is not limited thereto.

Meanwhile, the steering frame (40) is arranged symmetrically with respect to the rear wheel (20) and includes a support part (42) whose ends are joined by contact with each other and a steering coupling part (43) coupled to a steering means (50) described later.

And the steering handle (41) is formed integrally on one side of the support member (42), but is configured in a form that protrudes to both sides of the seat (35) so that a passenger seated on the seat (35) can grip the steering handle (41) with both hands.

The unexplained symbol (45) in the drawing is a shock-up means (45) for offsetting vibration transmitted upward and downward to the steering frame (40), and is made of a spring having elastic restoring force, one end of which is coupled to the steering frame (40) and the other end of which is coupled to the main frame (30), thereby providing elastic force for supporting the steering frame (40) upward. This shock-up means (45) can be modified in various ways in addition to the spring structure illustrated in the drawing, and as another embodiment, it can be made to have a structure capable of reciprocating in a straight line like a piston.

The above steering means (50) is arranged between the main frame (30) and the steering frame (40) to rotatably support the steering frame (40), and includes a steering body (51) in which a steering frame insertion hole (511) is formed to rotatably couple the steering frame (40), an axle arrangement portion (52) formed in a direction perpendicular to the longitudinal direction of the steering body (51), and a steering shaft (53) formed in a rod shape extending in the longitudinal direction and arranged in the axle arrangement portion (52).

The above steering body (51) has a steering frame insertion hole (511) formed into which the steering coupling part (43) of the steering frame (40) is inserted, and is fixed to the main frame (30).

At this time, the steering body (51) is provided with a joining flange (512) for fixing to the main frame (30), and the joining flange (512) has one end fixed to the main frame (30) and the other end has a joining hole (513) formed into which a steering shaft (53) inserted into the shaft arrangement (52) is inserted. Here, the main frame (30) and the joining flange (512) can be fixed through a joining means such as welding or a joining bolt, or can be formed integrally with the main frame (30).

In addition, a bearing may be further placed in the above-mentioned joint (513) to rotatably support the steering shaft (53) inserted in the above-mentioned shaft arrangement (52).

The above-described axle arrangement (52) is formed in the longitudinal direction of the steering body (51), more precisely, in a direction perpendicular to the steering frame insertion hole (511) formed in the steering body (51), so that the steering shaft (53) described below is rotatably inserted.

The above steering shaft (53) is formed in the shape of a rod extending in the longitudinal direction and is coupled with a driven gear (63) that constitutes a driving means (60) described later.

Here, the steering shaft (53) is detachably inserted into the axle arrangement (52), and for driving, it is inserted into the axle arrangement (52) and the driven gear (63) is engaged, and for storing or transporting the bicycle, during the folding process, it is separated from the axle arrangement (52) and folded so that the main frame (30) and the steering frame (40) are in a direction close to each other.

At this time, the steering shaft (53) is not completely separated from the axle arrangement (52) but moved to a position away from the steering frame (40), thereby rotating the steering frame (40) toward the main frame (30) to fold the bicycle.

The steering means (50) configured as described above controls the steering handle (41) to rotate the steering frame (40) while the steering frame (40) is inserted into the steering body (51), and the driving direction is adjusted as the rear wheel (20) coupled to the steering frame (40) rotates.

Here, when the steering frame (40) rotates, interference with the steering shaft (53) may occur, and to prevent this, a rotation interference prevention means (54) is additionally provided.

The above rotation interference prevention means (54) is formed along the outer surface of the steering frame (40), and includes a pair of rotational holes (541) formed symmetrically to each other, and in which the steering shaft (53) is rotatably arranged.

And the steering shaft (53) arranged in the above rotary hole (541) is composed of a pair of coupling areas (531) that are arranged symmetrically and to which the driving gear (61) or the transmission gear (66) is coupled, and a connecting area (532) that connects the pair of coupling areas (531) and is arranged in the rotary hole (541), wherein the connecting area (532) is formed to have a relatively smaller diameter than the connecting area (531) and is arranged to be movable in the rotary hole (541).

At this time, the steering shaft (53) can be separated from the axle arrangement (52) to fold the bicycle by rotating the main frame (30) and the steering frame (40) as described above, and one of the pair of connecting areas (531) is integrally fixed to the connecting area (532) and the other connecting area (531) is detachably connected to the connecting area (532).

Here, the coupling and separation of another coupling area (531) and the steering shaft (53) may be achieved by forming a coupling spiral on the outer surface of the steering shaft (53) and forming a corresponding spiral in the coupling area (531) that is engaged with or separated from the coupling spiral, thereby coupling them together, but the present invention is not limited thereto.

In the drawing, the unexplained symbol (55) is provided with a slot (55) to which a transmission gear shaft (661) that rotatably supports a transmission gear (66) of a driving means (60) described later is coupled.

The above driving means (60) generates driving power through pedaling by a rider, and includes a driving gear (61) arranged on the front wheel (10), a pedal (62) coupled with the driving gear (61) via a crank arm, a driven gear (63) arranged on the other side of the longitudinal direction of the main frame (30), a power transmission means (64) connecting the driving gear (61) and the driven gear (63), a link gear (65) with which the driven gear (63) engages, a transmission gear (66) engaging with the link gear (65), a rear wheel gear (67) arranged on the rear wheel (20), and a rear wheel chain (68) of an endless type that connects the transmission gear (66) and the rear wheel gear (67).

The above driving gear (61) is placed on the front wheel (10), and a pedal (62) driven by a passenger is connected through a crank arm, so that the passenger drives the driving gear (61) by pedaling.

The above-mentioned driven gear (63) is connected to the above-mentioned driving gear (61) through the power transmission means (64) and receives power generated through pedaling to rotate, and transmits the received rotational power to the above-mentioned link gear (65) to rotate the above-mentioned link gear (65).

And the transmission gear (66) meshed with the above link gear (65) rotates in conjunction with the rotation of the link gear (65), and transmits rotational power to the rear wheel gear (67) connected to the link gear (65) by the rear wheel chain (68) and arranged on the rear wheel (20).

The driving means (60) configured as described above rotates the driving gear (61) when the rider operates the pedal (62), and the driven gear (63) coupled with the driving gear (61) through the power transmission means (64) rotates, and the link gear (65) that is engaged with the driven gear (63) rotates. Then, the transmission gear (66) that is engaged with the link gear (65) rotates, and at the same time, the rear wheel gear (67) coupled by the rear wheel chain (68) and arranged on the rear wheel (20) rotates, causing the front and rear wheels to move.

As shown in the drawing, the driving means (60) has a through hole (652) formed in the center of the link gear (65) into which the steering frame (40) is inserted and an inner bearing (651) for supporting the rotation of the contacting steering frame (40) is arranged, and a chain groove (653) is formed along the outer circumference radially so that the driving gear (61) or the transmission gear (66) engages.

The above through hole (652) is formed in the upper and lower direction through the center of the link gear (65) so that the steering frame (40) is inserted, and when the steering frame (40) rotates under the control of the steering handle (41), an inner bearing (651) is placed in the through hole (652) to ensure stable rotation stability and prevent damage due to friction.

The above chain home (653) is formed radially along the edge of the link gear (65) so that the driven gear (63) and the transmission gear (66) are each engaged.

In the driving means (60) formed as described above, the link gear (65) is arranged in a horizontal direction, and the driven gear (63) and the transmission gear (66) are each arranged in a vertical direction. For example, they are engaged in a direction perpendicular to the link gear (65), with the driven gear (63) engaging the upper surface of the link gear (65) and the transmission gear (66) engaging the lower surface of the link gear (65).

The direction and position of coupling of the link gear (65) and the driven gear and transmission gear are not limited to the direction and position shown in the drawing, and various changes can be made as needed.

Meanwhile, the power transmission means (64) includes a transmission rod (641) formed in a longitudinally extended rod shape, a pair of meshing gears (642) arranged at each end of the longitudinal direction of the transmission rod (641) to mesh with the driving gear (61) and the driven gear (63), and a sub-gear (643) arranged between the driven gear (63) and the meshing gear (642).

The above-mentioned transmission rod (641) is intended to transmit power generated from the driving gear (61) to the driven gear (63), and is formed in the shape of a rod extending in the longitudinal direction, with meshing gears (642) arranged at both ends in the longitudinal direction.

The above interlocking gear (642) is coupled to the above transmission rod (641) and receives the rotational power of the driving gear (61) to rotate the driven gear (63).

And the sub-gear (643) is arranged between the driven gear (63) and the meshing gear (642) to transmit the rotational power of the meshing gear (642) to the driven gear (63).

Meanwhile, the main frame (30) is further provided with a bottom bracket (70) to which the driving means (60) is coupled, and the bottom bracket (70) includes a power transmission shaft (71) that is coupled to the driving means (60) and rotates by the generated power, a hub (72) that surrounds and couples the power transmission shaft (71), a pair of bearings (73) that are respectively arranged on both sides of the hub (72) in the longitudinal direction, a disc brake (74) coupled to the power transmission shaft (71), and a ratchet module (75) for controlling the rotational direction of the front wheel.

The bottom bracket (70) formed as described above improves power transmission efficiency and prevents the front wheel (10) from rotating in the opposite direction of the driving direction, thereby improving stability, especially during braking operations or when driving uphill.

Looking at this in more detail, the power transmission shaft (71) is formed in a rod shape extending in the longitudinal direction, and a number of engaging grooves (711) are formed radially inwardly on the outer surface of one side in the longitudinal direction, and the engaging grooves (711) can firmly maintain a combined state when combined with a hub (72) described later.

And the drive gear (61) is coupled to the power transmission shaft (71) and rotates when the above-described drive means (60) operates.

The above power transmission shaft (71) is coupled with the hub (72) and, at the same time, its rotation direction is restricted by the ratchet module (75) when rotating, thereby restricting the front wheel (10) from rotating backwards.

The above hub (72) is formed as a hollow cylinder with a center to surround and couple the power transmission shaft (71), and the pair of bearings (73) are arranged on each side of the hub (72) in the longitudinal direction.

The above hub (72) is combined with a part of the ratchet module (75) described later and has a front wheel (10) combined on its outer surface. The power transmission shaft (71) rotates in conjunction with the rotation of the drive gear (61) and transmits the received power to the front wheel (10) to rotate the front wheel (10).

At this time, the front wheel (10) may be relatively slow compared to the rotation speed of the rear wheel (20) during driving uphill. If the rotation speed of the front wheel (10) is slow, the center of gravity is distributed over a wide area in the present invention, which may cause the passenger to fall backwards or to the side. In addition, if the rotation speed of the front wheel (10) is slow compared to the rear wheel (20), the passenger's load, air resistance, etc. must be supported by the rotational force of the rear wheel (20), i.e., the pushing force, during driving uphill, which may cause a problem in that the driving performance is reduced.

That is, in the case of a typical bicycle, the center of gravity is arranged so that it is concentrated toward the driving wheel, so the driving force formed by pedaling can be fully transferred to the driving force. However, in the case of a recumbent bicycle, in which the rider leans backward while riding, the center of gravity of the rider is arranged so that it is spread over a wide area, so there was a problem that the driving force was difficult to fully transfer to the driving force.

Therefore, maintaining the rotation speed of the front wheel (10) equal to the rotation speed of the rear wheel (20) can improve driving stability when driving uphill.

In the present invention, in order to maintain the rotational speed of the front wheel (10) to be the same as the rotational speed of the rear wheel (20), a hub (72) to which the front wheel (10) is coupled is arranged, and the hub (72) rotates by the rotation of the power transmission shaft (71). At this time, as described above, the power transmission shaft (71) is directly coupled to the driving gear (61) and directly receives the driving force of the pedal (62) to rotate and rotate the front wheel (10), and the rear wheel (20) receives the rotational force and rotates while passing through the driving gear (61), link gear (65), and transmission gear (66) in sequence.

Through this, the rotation speed of the front wheel (10) is increased and power is simultaneously transmitted to the rear wheel (20), thereby increasing the rotation speed of the rear wheel (20). In other words, compared to driving by transmitting power to only one of the front wheel (10) or the rear wheel (20), the rotation speeds of the front wheel (10) and the rear wheel (20) can be maintained to be the same or similar.

The above pair of bearings (73) are respectively arranged on both sides of the longitudinal direction of the hub (72) to support the rotation of the power transmission shaft (71).

And the above disc brake (74) is for controlling the driving of the bicycle. Since the structure and operation relationship of this disc brake (74) are well known, a detailed description will be omitted.

The ratchet module (75) above is intended to prevent the front wheel (10) from rotating in reverse, and includes an inner body (751) to which the power transmission shaft (71) is coupled, and an outer body (752) to which the hub (72) is coupled. The inner body (751) is provided with a ratchet (753) that is rotatably arranged in the outer body (752) and restricts the rotational direction of the power transmission shaft (71) to one direction.

The above inner body (751) is formed in a cylindrical shape with a hollow center and is provided with a ratchet (753) to limit the rotation direction of the power transmission shaft (71) to one direction.

And the outer body (752) is connected to the inner body (751) while surrounding it and connected to the hub (72), and rotates in conjunction with the rotation of the inner body (751) to rotate the hub (72) and thereby rotate the front wheel (10).

The ratchet module (75) formed as described above prevents reverse rotation of the front wheel (10) in the opposite direction to the driving direction during the process of rotating the front wheel (10). The ratchet (753) is caught on the ratchet wheel (754) provided on the power transmission shaft (71) to prevent reverse rotation, thereby improving stability.

In addition, in the present invention, the driving direction of the bicycle is controlled by steering the rear wheel (20). However, steering the rear wheel (20) may result in a narrow steering angle or slow steering speed. To solve this problem, in the present invention, a foot steering frame (80) is provided on the main frame (30).

In addition, in the case where the front wheel (10) and the rear wheel (20) are configured as two wheels each, a problem of the passenger falling to the side while driving may occur, so in the present invention, the front wheels (10) are arranged in pairs at mutually spaced locations, and a pair of front wheels (10) are connected to the foot steering frame (80) so that they can be driven.

In this embodiment, as shown in Fig. 3, a pair of front wheels (10) are positioned spaced apart from each other, and a pair of front wheels (10) are connected to the foot steering frame (80) so that they can be driven at a spaced apart position.

The above foot steering frame (80) includes a front wheel coupling part (81) to which the pair of front wheels (10) are respectively coupled, and a steering pedal (82) that controls the movement direction of the pair of front wheels (10) by interlocking and rotating the pair of front wheels (10).

This foot steering frame (80) is formed by mutually connecting a plurality of rods, and the front wheel connecting portion (81) is connected to a pair of front wheels (10) on both sides in the width direction, and the steering pedals (82) are arranged in a pair of mutually spaced positions so that the passenger's legs are placed, and the direction of the pair of front wheels (10) can be adjusted by simultaneously moving the passenger's legs to the left or right.

In the embodiment of the present invention, which comprises a pair of front wheels (10) and one rear wheel (20), a driving means including a battery and a motor may be used as a driving means proposed in a typical electric bicycle to provide driving force.

As described above, the present invention has been described by specific matters such as specific components, limited examples, and drawings, but these have been provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those with common knowledge in the field to which the present invention pertains can make various modifications and variations from this description.

Therefore, the idea of the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the claims described below as well as the claims are considered to fall within the scope of the idea of the present invention.

1: Rear-wheel steering recumbent bicycle
10 : Front wheel
20 : Rear wheel
30 : Mainframe
31: Support bar 32: Inclined bar
33: Bottom body 34: Reinforcement bar
35 : Sheet
40 : Steering Frame
41: Steering handle 42: Support
43: Steering linkage 45: Shock-up means
50 : Steering means
51: Steering body 52: Axle arrangement
53: Steering shaft 54: Rotation interference prevention means
55 : Slot
60 : Driving means
61: Drive gear 62: Pedal
63: Driven gear 64: Power transmission means
65: Link gear 66: Transmission gear
67: Rear gear 68: Rear chain
70 : Bottom bracket
71: Power transmission shaft 72: Hub
73 : Bearing 74 : Disc Brake
75 : Ratchet module
751: Inner body 752: Outer body
753 : Ratchet
80 : Foot steering frame
81: Front wheel connection 82: Steering pedal

Claims (11)

A main frame (30) to which a front wheel (10) is connected and on which a seat (35) is placed on the upper side;
A steering frame (40) to which a rear wheel (20) is connected and which is provided with a steering handle (41) for changing direction;
A steering means (50) positioned between the main frame (30) and the steering frame (40) to support rotation of the steering frame (40);
It includes a driving means (60) for providing power for movement;
The above steering means (50) is,
A steering body (51) having a steering frame insertion hole (511) formed to rotatably connect the above steering frame (40),
An axle arrangement (52) formed in a direction perpendicular to the longitudinal direction of the steering body (51),
A rear-wheel steering recumbent bicycle characterized by including a steering shaft (53) formed in the shape of a rod extending in the longitudinal direction and arranged in the axle arrangement (52). In claim 1, the steering means (50) comprises:
A rear-wheel steering recumbent bicycle characterized in that it further comprises a rotation interference prevention means (54) to prevent mutual interference between the steering frame (40) and the steering shaft (53) when rotating. In claim 2, the rotation interference prevention means (54) is
A rear-wheel steering recumbent bicycle characterized by including a pair of rotating holes (541) formed along the outer surface of the steering frame (40) and formed symmetrically to each other, and in which the steering shaft (53) is rotatably arranged. In claim 1 or 2, the driving means (60) is
A driving gear (61) placed on the front wheel (10),
A pedal (62) coupled through the above driving gear (61) and crank arm,
A driven gear (63) arranged on the longitudinal side of the main frame (30),
A power transmission means (64) that is made of an endless type and connects the driving gear (61) and the driven gear (63),
The above-mentioned driven gear (63) is engaged with a link gear (65),
A transmission gear (66) that meshes with the above link gear (65),
A rear wheel gear (67) placed on the above rear wheel (20),
A rear-wheel steering recumbent bicycle characterized by including a rear chain (68) that is made of an endless type and connects the transmission gear (66) and the rear wheel gear (67). In claim 4,
A rear-wheel steering recumbent bicycle, characterized in that the above-mentioned driven gear (63) and the above-mentioned transmission gear (66) are meshed in a direction perpendicular to the above-mentioned link gear (65). In claim 4,
The above driven gear (63) and the above transmission gear (66) are,
A rear-wheel steering recumbent bicycle characterized in that the driven gear (63) is engaged with the upper surface of the link gear (65) and the transmission gear (66) is engaged with the lower surface of the link gear (65) in a direction perpendicular to the link gear (65). In claim 4, the link gear (65) is
The steering frame (40) is inserted in the center, and a through hole (652) is formed in which an inner bearing (651) is placed to support the rotation of the steering frame (40) in contact with it.
A rear-wheel steering recumbent bicycle characterized in that a chain groove (653) is formed radially along the outer surface and in which the drive gear (61) or the transmission gear (66) engages. In claim 1 or 2, the main frame (30) has:
A bottom bracket (70) to which the above driving means (60) is coupled is further provided,
The above bottom bracket (70) is
A power transmission shaft (71) that rotates by the power generated by being coupled to the above driving means (60),
A hub (72) that surrounds and connects the above power transmission shaft (71),
A pair of bearings (73) arranged on each side of the longitudinal direction of the above hub (72),
A disc brake (74) coupled to the above power transmission shaft (71) and
A rear-wheel steering recumbent bicycle characterized by including a ratchet module (75) for controlling the rotation direction of the front wheel. In claim 8, the ratchet module (75)
The inner body (751) to which the above power transmission shaft (71) is coupled,
It includes an outer body (752) to which the above hub (72) is coupled,
The above inner body (751) is
A ratchet (753) is provided that is rotatably positioned on the outer body (752) and limits the rotation direction of the power transmission shaft (71) to one direction.
On the above power transmission shaft (71),
A rear-wheel steering recumbent bicycle characterized in that it is provided with a ratchet wheel (754) whose rotation direction is limited by the ratchet (753) to limit the front wheel (10) from rotating backwards. In claim 1 or 2, the main frame (30) has:
The above front wheels (10) are joined in pairs at mutually spaced positions,
A rear-wheel steering recumbent bicycle characterized by having a foot steering frame (80) for steering the direction of movement of the front wheel (10). In claim 10, the foot steering frame (80)
A front wheel connecting part (81) to which the above pair of front wheels (10) are each connected,
A rear-wheel steering recumbent bicycle characterized by including a steering pedal (82) that controls the direction of movement of the pair of front wheels (10) by rotating the pair of front wheels (10) in conjunction with each other.

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