KR102756696B1 - Freewheel adjustable wheels and fitness bike therewith - Google Patents

Abstract

An invention is disclosed for a freewheel adjustable wheel and an exercise bike having the same. The freewheel adjustable wheel of the present invention includes: a rotating gear section that receives power from a pedal section to rotate and has gears provided along an outer circumference; a case section that rotatably supports the rotating gear section; a clutch bearing that transmits power to the case section when the rotating gear section rotates in a forward direction; a clutch hub that rotates together with the rotating gear section; a clutch gear that is installed in series with the clutch hub and is fixed to the case section; a driving section that supplies rotational power; and a moving gear section that is moved by the power of the driving section.

Description

FREEWHEEL ADJUSTABLE WHEELS AND FITNESS BIKE THEREWITH

The present invention relates to a freewheel adjustable wheel that can automatically control whether power from a pedal is transmitted to the wheel when the pedal rotates in the reverse direction, and to an exercise bicycle equipped with the same.

Weight machines for strengthening muscles and aerobic exercise machines for strengthening cardiopulmonary functions are widely used as exercise equipment as indoor exercise equipment to strengthen muscles.

Aerobic exercise equipment is broadly divided into treadmills that allow users to walk or run on an endless track, exercise bikes that allow users to perform cardiopulmonary exercises while strengthening their leg muscles by rotating the pedals, and steppers that provide the effect of climbing stairs.

Exercise bikes are installed in designated areas, and the wheels rotate by pedaling, allowing you to exercise. These exercise bikes can be divided into spinning bikes that allow you to do spinning exercises, and indoor bikes that rotate the wheels by pedaling in the forward direction like a bicycle.

Spinning bikes use a non-freewheel structure because they require pedaling to exercise, while indoor bikes use a freewheel structure.

The non-freewheel structure applied to spinning bicycles transmits power to the wheels whether the pedals are rotated in the forward direction or in the reverse direction, so the wheels rotate.

Also, the freewheel structure applied to indoor bicycles transmits power to the wheels when the pedals are rotated in the forward direction, and does not transmit power to the wheels when the pedals are rotated in the reverse direction.

Previously, since the power transmission structures of spinning bikes and indoor bikes were different, there was a problem in that if you alternate between spinning and bike exercise, you had to purchase a spinning bike and an indoor bike separately, which increased the cost of purchasing exercise equipment. Therefore, there is a need to improve this.

The background technology of the present invention is published in Korean Patent Publication No. 10-1641429 (registered on July 14, 2016, title of the invention: spinning bicycle).

The purpose of the present invention is to provide a freewheel adjustable wheel that can selectively use a freewheel function by motor driving and an exercise bike equipped with the same.

Another object of the present invention is to provide a freewheel adjustable wheel and an exercise bike equipped with the same, which can perform spinning exercise and bicycle exercise with a single exercise machine.

The purposes of the present invention are not limited to the purposes mentioned above, and other purposes and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, it will be easily understood that the purposes and advantages of the present invention can be realized by the means and combinations thereof indicated in the claims.

In order to solve the above-described problem, the freewheel adjustable wheel and the exercise bike equipped with the same according to the present invention have a technical feature of controlling the freewheel operation by operating the driving unit to move the moving gear unit.

Specifically, the moving gear part moves up and down by the operation of the driving part, and the rotation of the clutch gear and the clutch hub can be synchronized, so that the freewheel mode and non-freewheel mode can be controlled.

A freewheel adjustable wheel according to the present invention comprises: a rotating gear section that receives power from a pedal section to rotate and has gears provided along an outer circumference; a case section that rotatably supports the rotating gear section; a clutch bearing that is installed between the rotating gear section and the case section and transmits power to the case section when the rotating gear section rotates in a forward direction; a clutch hub that is fixed to the outer side of the rotating gear section and rotates together with the rotating gear section; a clutch gear that is installed continuously to the clutch hub and is fixed to the case section; a driving section that is fixed to the case section and supplies rotational power; and a moving gear section that moves by the power of the driving section in a freewheel mode in which it engages with the clutch hub and in a non-freewheel mode in which it simultaneously engages with the clutch hub and the clutch gear.

In addition, the rotating gear part includes a pulley part located outside the case part and receiving power from the pedal part through a belt, and a rotating body extending from the pulley part to the inside of the case part and rotating together with the pulley part.

In addition, the clutch hub includes a hub body in the shape of a disk whose center coincides with the rotating body and is fixed to the outside of the rotating body, and a first outer gear in the shape of a projection that is installed along the outer periphery of the hub body and extends in the vertical direction.

In addition, the case part rotates together with the clutch gear and receives rotational power through the clutch bearing, and includes a cover case installed in a shape that surrounds the clutch bearing and the moving gear part, and a fixed case that supports the driving part and is installed in an opened portion of the cover case.

In addition, the clutch gear includes a second outer gear that is installed in an annular shape on the inside of the cover case and protrudes outward from the gear body that is fixed to the cover case and engages with the moving gear portion to transmit power.

In addition, the present invention further includes a stator that is fixed to the fixed case and is installed in an annular shape along the perimeter of the fixed case and generates magnetic force.

In addition, the driving unit includes a driving body that is fixed to the fixed case and supplies rotational power, and an output shaft that protrudes outside the driving body and rotates by the operation of the driving body and is connected to the moving gear unit to move the moving gear unit.

In addition, the moving gear part includes a first moving gear part that is installed in a ring shape on the outside of the clutch hub and receives power from the driving part to move in a straight direction, and a second moving gear part that is located on the inside of the first moving gear part and has a gear that meshes with the clutch hub and the clutch gear.

In addition, the first moving gear unit includes a first assembly gear that is installed on one side of the clutch hub and moved by the operation of the driving unit, and a second assembly gear that is installed on the other side of the clutch hub and connected to the first assembly gear.

In addition, a first engaging projection is provided on the inner side of the first assembly gear to be inserted into a engaging groove provided on the outer side of the second moving gear part. In addition, a second engaging projection is provided on the inner side of the second assembly gear to be inserted into a engaging groove.

In addition, the second moving gear part includes a second moving gear body installed in an annular shape, a groove part formed in an annular shape along the outer circumference of the second moving gear body and a joining groove part engaged with a projection protruding inwardly of the moving gear part, and an inner gear protruding inwardly of the second moving gear body and meshing with a gear provided in the clutch gear and a gear provided in the clutch hub.

The freewheel adjustable wheel according to the present invention comprises: a rotating gear section that receives power from a pedal section to rotate and has gears provided along the outer circumference; a shaft that penetrates the inner side of the rotating gear section and is installed horizontally and is fixed to a frame section; a cover case in which the rotating gear section and the shaft are installed so as to penetrate the center and are rotatably installed; a fixed case that is installed in a shape that shields an opened portion of the cover case and is restricted from rotation; a clutch bearing that is installed between the rotating gear section and the cover case and transmits power to the cover case when the rotating gear section rotates in a forward direction; a clutch hub that is fixed to the outer side of the rotating gear section and rotates together with the rotating gear section; a clutch gear that is installed continuously to the clutch hub and is fixed to the cover case; a driving section that is fixed to the fixed case and supplies rotational power; and a moving gear section that moves in a freewheel mode in which the driving power from the driving section engages the clutch hub, and a non-freewheel mode in which the clutch hub and the clutch gear are simultaneously engaged.

In addition, the rotating gear part includes a pulley part located outside the cover case and receiving power from the pedal part through a belt, and a rotating body extending from the pulley part to the inside of the cover case and rotating together with the pulley part.

In addition, the clutch hub includes a hub body in the shape of a disk whose center coincides with the rotating body and is fixed to the outside of the rotating body, and a first outer gear in the shape of a projection that is installed along the outer periphery of the hub body and extends in the vertical direction.

In addition, the clutch gear includes a gear body that is installed in an annular shape on the inside of the cover case and fixed to the cover case, and a second outer gear that protrudes outside the gear body and engages with the moving gear portion to transmit power.

In addition, the present invention further includes a stator that is fixed to the fixed case and installed in an annular shape along the perimeter of the fixed case, and generates magnetic force to control the rotational load of the cover case.

In addition, the driving unit includes a driving body that is fixed to the fixed case and supplies rotational power, and an output shaft that protrudes outside the driving body and rotates by the operation of the driving body and is connected to the moving gear unit to move the moving gear unit.

In addition, the moving gear part includes a first moving gear part that is installed in a ring shape on the outside of the clutch hub and receives power from the driving part to move in a straight direction, and a second moving gear part that is located on the inside of the first moving gear part and has a gear that meshes with the clutch hub and the clutch gear.

In addition, the first moving gear unit includes a first assembly gear installed on one side of the clutch hub and moved by the operation of the driving unit, and a second assembly gear installed on the other side of the clutch hub and connected to the first assembly gear.

In addition, a first engaging projection is provided on the inner side of the first assembly gear to be inserted into a engaging groove provided on the outer side of the second moving gear part. In addition, a second engaging projection is provided on the inner side of the second assembly gear to be inserted into a engaging groove.

In addition, the second moving gear part includes a second moving gear body installed in an annular shape, a groove part formed in an annular shape along the outer circumference of the second moving gear body and a joining groove part engaged with a projection protruding inwardly of the moving gear part, and an inner gear protruding inwardly of the second moving gear body and meshing with a gear provided in the clutch gear and a gear provided in the clutch hub.

An exercise bicycle according to the present invention comprises: a frame portion supporting a saddle portion and a handle portion; a pedal portion installed on a rotating disk installed on the side of the frame portion; a rotating gear portion that receives power from the pedal portion and rotates and has gears provided along an outer circumference; a case portion that rotatably supports the rotating gear portion; a clutch bearing that is installed between the rotating gear portion and the case portion and transmits power to the case portion when the rotating gear portion rotates in a forward direction; a clutch hub that is fixed to the outer side of the rotating gear portion and rotates together with the rotating gear portion; a clutch gear that is installed continuously to the clutch hub and is fixed to the case portion; a driving portion that is fixed to the case portion and supplies rotational power; and a moving gear portion that moves by the power of the driving portion in a freewheel mode in which it engages with the clutch hub and a non-freewheel mode in which it simultaneously engages the clutch hub and the clutch gear.

The freewheel adjustable wheel according to the present invention and the exercise bike equipped with the same can selectively use the freewheel function by the operation of the moving gear unit, which moves by the operation of the driving unit, thereby improving the convenience of use of the exercise equipment.

In addition, the present invention can reduce the purchase cost of exercise equipment since it is not necessary to purchase exercise equipment separately depending on whether or not it has a freewheel function.

In addition to the effects described above, specific effects of the present invention are described below together with specific matters for carrying out the invention.

FIG. 1 is a perspective view illustrating an exercise bike having a freewheel adjustable wheel according to one embodiment of the present invention.
FIG. 2 is a front view illustrating a state in which a freewheel adjustable wheel is installed on the inside of an exercise bike according to one embodiment of the present invention.
FIG. 3 is a perspective view illustrating a state in which a belt member is connected to a freewheel adjustable wheel according to one embodiment of the present invention.
FIG. 4 is an exploded perspective view of a freewheel adjustable wheel according to one embodiment of the present invention.
FIG. 5 is a perspective view illustrating a state in which a moving gear unit is connected to a clutch hub according to one embodiment of the present invention.
FIG. 6 is a perspective view illustrating a state in which a freewheel adjustable wheel according to one embodiment of the present invention is operated in freewheel mode.
FIG. 7 is a perspective view illustrating a state in which a moving gear part according to one embodiment of the present invention is positioned below a clutch gear.
FIG. 8 is a cross-sectional view illustrating a state in which a freewheel adjustable wheel according to one embodiment of the present invention is operated in freewheel mode.
FIG. 9 is a cross-sectional view illustrating a state in which power is transmitted to a freewheel-adjustable wheel in freewheel mode according to one embodiment of the present invention.
FIG. 10 is a perspective view illustrating a state in which a freewheel adjustable wheel according to one embodiment of the present invention is operated in a non-freewheel mode.
FIG. 11 is a perspective view illustrating a state in which a moving gear part is connected to a clutch gear according to one embodiment of the present invention.
FIG. 12 is a cross-sectional view illustrating a state in which a freewheel adjustable wheel according to one embodiment of the present invention is operated in a non-freewheel mode.
FIG. 13 is a cross-sectional view illustrating a state in which power is transmitted to a freewheel-adjustable wheel in a non-freewheel mode according to one embodiment of the present invention.

The above-mentioned objects, features and advantages will be described in detail below with reference to the attached drawings, so that those with ordinary skill in the art to which the present invention pertains can easily practice the technical idea of the present invention. In describing the present invention, if it is judged that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Although the terms first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another, and unless otherwise specifically stated, a first component may also be a second component.

Hereinafter, the phrase “any configuration is disposed on (or below)” a component or “on (or below)” a component may mean not only that any configuration is disposed in contact with the upper surface (or lower surface) of said component, but also that another configuration may be interposed between said component and any configuration disposed on (or below) said component.

Additionally, when a component is described as being "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through other components.

Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

As used herein, the singular expressions include the plural expressions unless the context clearly indicates otherwise. In this application, the terms "consisting of" or "comprising" should not be construed as necessarily including all of the various components or various steps described in the specification, and should be construed as not including some of the components or some of the steps, or may include additional components or steps.

Throughout the specification, when reference is made to "A and/or B", this means A, B, or A and B, unless otherwise stated, and when reference is made to "C through D", this means C or more and D or less, unless otherwise stated.

Hereinafter, a freewheel adjustable wheel (200) and an exercise bike (1) equipped with the same according to one embodiment of the present invention will be described.

FIG. 1 is a perspective view illustrating an exercise bike (1) equipped with a freewheel adjustable wheel (200) according to one embodiment of the present invention, and FIG. 2 is a front view illustrating a state in which a freewheel adjustable wheel (200) is installed on the inside of an exercise bike (1) according to one embodiment of the present invention.

As shown in FIGS. 1 and 2, the exercise bike (1) can be operated in a freewheel mode and a non-freewheel mode. The exercise bike (1) switches between the freewheel mode and the non-freewheel mode by the operation of a driving unit (270) using a motor.

The exercise bike (1) uses a one-way clutch bearing (240) so that power is transmitted only when rotating in the forward direction. In addition, power is transmitted even when rotating in the reverse direction by the moving gear unit (280) operated by the driving unit (270), so that it operates in a non-freewheel mode.

When the exercise bike (1) is operated in freewheel mode, power is transmitted through the clutch bearing (240), so that low-noise operation can be achieved, and the thickness and size of the product can be significantly reduced compared to conventional exercise bikes.

When the exercise bike (1) is operated in non-freewheel mode, the gear provided in the moving gear unit (280) transmits power by connecting the gear of the clutch hub (250) and the gear of the clutch gear (260).

The exercise bike (1) is capable of various modifications within the technical concept of controlling freewheel mode operation and non-freewheel mode operation by operating the driving unit (270) to move the moving gear unit (280). A freewheel adjustable wheel (200) is installed inside the exercise bike (1), and a driving unit (270) is installed on the freewheel adjustable wheel (200).

The moving gear unit (280) is moved by the operation of the driving unit (270), and the power transmission is controlled by the operation of the moving gear unit (280) engaging only the clutch hub (250) or engaging simultaneously with the clutch gear (260) and the clutch hub (250), so that the freewheel mode and the non-freewheel mode can be controlled.

An exercise bike (1) according to one embodiment of the present invention may include at least one of a frame portion (10), a belt member (20), a rotating disk, a pedal portion (40), a rotating support shaft (50), a base portion (60), a seat housing portion (70), handles, a display portion (90), a seat post (100), a seat (110), and a freewheel adjustable wheel (200).

The frame part (10) can be modified in various ways within the technical concept of forming the body of the exercise bike (1). The frame part (10) according to one embodiment of the present invention includes an outer frame (12), an inner frame (14), and a side frame (16).

The outer frame (12) is open on both sides, is located on the upper side of the base part (60), and is fixed to the seat post (100). A freewheel adjustable wheel (200), a rotating disc, and an inner disc are installed on the inner side of the outer frame (12).

The outer frame (12) forms a frame having a shape of approximately the letter "L", and an inner frame (14) is installed on the inner side of the outer frame (12). The inner frame (14) supports a freewheel adjustable wheel (200) on the inner side of the frame portion (10). The inner frame (14) has a shape in which a plurality of beam members are connected, and one side of the inner frame (14) is fixed to a seat (110) post and the other side supports a shaft (220) of the freewheel adjustable wheel (200).

The side frame (16) is connected to the open sides of the outer frame (12). The side frame (16) is plate-shaped and is detachably installed on both sides of the outer frame (12), thereby facilitating repair and replacement of parts of the exercise bike (1).

This frame part (10) can be formed into various structures depending on the load distribution and structure of the exercise bike (1).

The rotation support shaft (50) is located on the inner side of the frame part (10) and is installed horizontally. Both sides of the rotation support shaft (50) can be connected to the inner disk. According to one embodiment of the present invention, both sides of the rotation support shaft (50) are connected to the center of the inner disk.

A circular disk (30) is fixed to the outside of the inner disk (31), and a pedal is detachably installed on the rim of the rotating disk (30). The pedal is perpendicular to the rotating disk (30) and is fastened to the rotating disk (30). Therefore, when the user steps on the pedal, the rotating disk and the inner disk rotate around the rotation support shaft (50).

The rotating disk (30) is formed in the shape of a circular panel. The side frame (16) is provided with a circular hole shape for installing the rotating disk (30). Since the rotating disk (30) and the inner disk (31) are installed in the circular hole provided in the side frame (16), the components on the inner side of the frame portion (10) can be shielded.

Accordingly, it is possible to block users, infants, and pets from accessing the inside of the frame (10) and prevent them from getting caught in parts located on the inside of the frame (10) when the pedal is rotated.

The belt member (20) is spanned over the outer edge of the inner disk, so that the rotation of the inner disk rotates the rotation gear member (210) provided on the freewheel adjustable wheel (200). One side of the belt member (20) is connected to the inner disk, and the other side of the belt member (20) is connected to the pulley member (212) of the rotation gear member (210).

The pedal part (40) is rotatably installed on a rotary disk mounted on the side of the frame part (10). The pedal part (40) is coupled to the rotary disk by a rotational motion in which it is coupled to a fastening groove provided in the rotary disk (30). In addition, the rotary disk rotates together with the pedal part (40).

The rotation support shaft (50) is installed so as to penetrate the center of the rotation disk (30) and the inner disk (31) that are rotated by the pedal. The rotation disk (30) and the inner disk (31) function as a driving wheel and are connected by a pulley member (212) of the rotation gear member (210) described later and a power transmission member such as a belt or chain. When the user steps on the pedal, the rotation disk (30) and the inner disk (31) rotate, and as the inner disk (31) rotates, the belt member (20) and the rotation gear member (210) rotate. Since the rotation disk (30) shields the hole provided in the side frame (16), it is possible to reduce the phenomenon of the user or an infant being damaged by the rotation of the pedal member (40).

A base part (60) is installed on the lower side of the frame part (10) to support the frame part (10). The base part (60) is installed in the shape of a plate, spaced apart from the lower side of the frame part (10). This base part (60) can be formed in various shapes.

The seat housing part (70) is installed on the upper side of the base part (60). The seat housing part (70) has a rectangular shape and extends upward from the base part (60) and penetrates the inner side of the frame part (10). The lower side of the seat housing part (70) is fixed to the base part (60). In addition, since the frame part (10) is fixed to the seat housing part (70), the frame part (10) is installed on the upper side away from the base part (60).

The seat housing part (70) can be arranged to be inclined in the upper and lower direction of the frame part (10). The seat (110) housing part is arranged between the rotation support shaft (50) and the shaft (220). This seat housing part (70) can be formed in the shape of a polygonal pipe or a circular pipe.

A handle (80) that a user can grip is installed on one side of the frame (10). A display section (90) that allows the user to easily check the operating status and exercise records of the exercise bike (1) is installed on the upper side of the frame (10) adjacent to the handle (80).

The display unit (90) can output exercise information such as the speed and rotational load of the exercise bike (1) on the screen.

A seat post (100) is installed on the upper side of the seat housing part (70) to support the lower side of the seat (110). The seat post (100) can be installed in a height-adjustable manner inside the seat housing part (70). Of course, the seat post (100) can be fixed inside the seat housing part (70). The cross-section of the seat post (100) can be formed in various ways depending on the shape of the seat housing part (70).

Since the seat post (100) is installed in the seat housing part (70) so as to be height-adjustable, the height of the seat (110) can be appropriately adjusted according to the user's height, physical condition, and exercise tendencies.

In the exercise bike (1) according to the present invention, the freewheel adjustable wheel (200) can be placed at the rear or front side with respect to the rotation support shaft (50). Depending on the installation position of the freewheel adjustable wheel (200), the shape of the frame part (10) changes. In addition, the positions of the rotation support shaft (50) and the shaft (220) also change.

FIG. 3 is a perspective view illustrating a state in which a belt member (20) is connected to a freewheel-adjustable wheel (200) according to one embodiment of the present invention, FIG. 4 is an exploded perspective view of a freewheel-adjustable wheel (200) according to one embodiment of the present invention, FIG. 5 is a perspective view illustrating a state in which a moving gear part (280) according to one embodiment of the present invention is connected to a clutch hub (250), FIG. 6 is a perspective view illustrating a state in which a freewheel-adjustable wheel (200) according to one embodiment of the present invention is operated in a freewheel mode, and FIG. 7 is a perspective view illustrating a state in which a moving gear part (280) according to one embodiment of the present invention is positioned below a clutch gear (260).

As shown in FIGS. 3 to 7, the freewheel adjustable wheel (200) includes a rotating gear portion (210), a shaft (220), a case portion (230), a clutch bearing (240), a clutch hub (250), a clutch gear (260), a driving portion (270), a moving gear portion (280), a stator (310), and a bearing portion (320).

The rotating gear part (210) rotates by receiving power from the pedal part (40), and various modifications are possible within the technical concept of having gears along the outer circumference. The rotating gear part (210) according to one embodiment of the present invention includes a pulley part (212) and a rotating body (214).

The pulley member (212) is connected to the belt member (20) and rotates by receiving power from the pedal member (40). Since gears are provided along the outer circumference of the pulley member (212), the slip phenomenon of the pulley member (212) that extends over the outer side of the pulley member (212) can be reduced. The pulley member (212) is located on the outer side of the case member (230) and receives power from the pedal member (40) through the belt member (20).

The rotating body (214) extends from the pulley member (212) to the inside of the case part (230) and rotates together with the pulley member (212). The rotating body (214) according to one embodiment of the present invention has a pipe shape.

The rotating gear part (210) is installed in the case part (230) to rotate by receiving power from the pedal part (40). A shaft (220) is installed inside the rotating gear part (210). Both sides of the shaft (220) are connected to the inner frame (14) so as not to rotate. A rotating gear part (210) is fitted on the outside of the shaft (220). The rotating gear part (210) is installed so as to be concentric with the shaft (220). A shaft bearing (324) is installed between the shaft (220) and the rotating gear part (210). Therefore, when the rotating gear part (210) rotates by the belt member (20), the shaft (220) does not rotate.

The shaft (220) penetrates the inside of the rotating gear part (210) and is installed horizontally, and is fixed to the frame part (10). The shaft (220) according to one embodiment of the present invention has a rod shape and is installed in a shape that penetrates the center of rotation of the case part (230).

The case part (230) rotatably supports the rotating gear part (210) and can be modified in various ways within the technical concept of being installed on the inside of the frame part (10). The case part (230) according to one embodiment of the present invention includes a cover case (232) and a fixed case (234).

The cover case (232) rotates together with the clutch gear (260) and receives rotational power by forward rotation through the clutch bearing (240). The cover case (232) includes a cover case (232) that rotates and a fixed case (234) that is fixed to the frame part (10). The cover case (232) is installed in a shape that surrounds the clutch bearing (240) and the moving gear part (280), and various modifications are possible within the technical concept.

The cover case (232) is installed with a rotating gear part (210) and a shaft (220) penetrating through the center, and is installed rotatably. The cover case (232) is axially coupled to the rotating gear part (210) and rotates in a freewheel mode and a non-freewheel mode. The rotating gear part (210) is coupled to the rotation center of the cover case (232).

In the freewheel mode, when the rotating gear part (210) rotates in the forward direction, the cover case (232) rotates in the forward direction, and when the rotating gear part (210) rotates in the reverse direction, the cover case (232) does not rotate. In the freewheel mode, when the rotating gear part (210) rotates in the reverse direction, the cover case (232) does not rotate and the rotating gear part (210) rotates idly in the cover case (232).

In the non-freewheel mode, the cover case (232) rotates in all cases where the rotating gear part (210) rotates in the forward or reverse direction. In the non-freewheel mode, the power input through the rotating gear part (210) is transmitted through the moving gear part (280), so the cover case (232) rotates together with the rotating gear part (210).

The fixed case (234) supports the driving unit (270) and is installed in the opened portion of the cover case (232). The fixed case (234) is installed in a shape that shields the opened portion of the cover case (232) and can be modified in various ways within the technical concept of constraining rotation.

A cover case (232) according to one embodiment of the present invention includes an outer case (233) and an inner rib (236). A rotation gear part (210) is rotatably coupled to the cover case (232). The cover case (232) may be formed in an overall circular shape. A rotation gear part (210) penetrates the center of the cover case (232). An outer case (233) may be formed around the periphery of the cover case (232) to surround a stator (310) to be described later.

The outer case (233) protruding vertically from the edge of the cover case (232) is installed in a ring shape and faces the outer edge of the edge of the fixed case (234).

An inner rib (236) is installed on the inner side of the outer case (233). The inner rib (236) and the outer case (233) are installed in an annular shape, and the diameter of the inner rib (236) is formed smaller than the diameter of the outer case (233). In addition, a stator (310) and a wheel bearing part (322) are installed between the outer case (233) and the inner rib (236). The inner rib (236) protrudes from the inner side of the cover case (232) toward the fixed case (234).

The wheel bearing part (322) is installed between the inner case (235) and the inner rib (236) of the fixed case (234) described later.

The fixed case (234) is formed in a disc shape, and the inner case (235) extended from the fixed case (234) is extended in a ring shape. The diameter of the inner case (235) is larger than the diameter of the inner rib (236) and smaller than the diameter of the outer case (233).

Accordingly, a stator (310) is installed between the outer case (233) and the inner case (235), and a wheel bearing part (322) is installed between the inner case (235) and the inner rib (236). When the cover case (232) rotates while the rotation of the fixed case (234) is restricted, friction is reduced by the wheel bearing part (322) installed between the cover case (232) and the fixed case (234).

The clutch bearing (240) is installed between the rotating gear part (210) and the case part (230), and various modifications are possible within the technical concept of transmitting power to the case part (230) when the rotating gear part (210) rotates in the forward direction.

The clutch bearing (240) is installed between the cover case (232) and the rotating gear part (210). An annular mounting groove in which the clutch bearing (240) is mounted may be formed in the center of the cover case (232). The mounting groove is concentric with the rotating gear part (210) and the cover case (232). The clutch bearing (240) is a one-way bearing that allows only one-way rotation of the rotating gear part (210). The clutch bearing (240) transmits power to rotate the rotating gear part (210) and the cover case (232) together when the rotating gear part (210) rotates in the forward direction. In addition, when the rotating gear part (210) rotates in the reverse direction, only the rotating gear part (210) rotates and does not transmit power to the cover case (232).

The clutch bearing (240) enables the freewheel mode of the cover case (232) by rotating the cover case (232) only when the rotating gear unit (210) rotates in the forward direction. The clutch bearing (240) is formed in a structure in which a bearing (not shown) is interposed between an inner ring (not shown) and an outer ring (not shown). When the clutch bearing (240) rotates in the forward direction, the bearing restrains the inner ring and the outer ring so that they rotate as one. And when rotating in the reverse direction, the bearing releases the restraint of the inner ring and the outer ring. The bearing can be applied in various shapes such as a spherical shape and a circular rod shape. This clutch bearing (240) can be variously modified within the technical concept of rotating the cover case (232) only when the rotating gear unit (210) rotates in the forward direction.

The clutch hub (250) is fixed to the outside of the rotating gear part (210) and various modifications are possible within the technical concept of rotating together with the rotating gear part (210). The clutch hub (250) is coupled to the outside of the rotating gear part (210). The clutch hub (250) is installed to be concentric with the rotating gear part (210). A first outer gear (254) is formed on the periphery of the clutch hub (250).

The first outer gear (254) is an external gear formed along the outer surface of the clutch hub (250). The clutch hub (250) rotates together with the rotating gear part (210) about the center of the rotating gear part (210), but is fixed to the rotating gear part (210) so as not to move in the axial direction of the rotating gear part (210). At this time, the rotating gear part (210) may be press-fitted into the center of the clutch hub (250) or may be gear-coupled to the center of the clutch hub (250). The clutch hub (250) may be formed in the shape of an annular disk.

A clutch hub (250) according to one embodiment of the present invention includes a hub body (252) and a first outer gear (254). The hub body (252) has a center coincident with the rotating body (214) and is a disc shape fixed to the outside of the rotating body (214).

The first outer gear (254) is installed along the outer circumference of the hub body (252) and is a gear in the shape of a projection extending in the vertical direction.

The clutch gear (260) is installed in series with the clutch hub (250), and various modifications are possible within the technical concept of being fixed to the case portion (230). The clutch gear (260) according to one embodiment of the present invention is fixed to the cover case (232) and rotates together with the cover case (232). The clutch gear (260) is installed along a ring shape and has the same center as the rotating gear portion (210). In addition, the center of the clutch gear (260) is the same as the center of the cover case (232). The clutch gear (260) according to one embodiment of the present invention includes a gear body (262) and a second outer gear (264).

The gear body (262) is installed in a ring shape on the inside of the cover case (232) and is fixed to the cover case (232). The gear body (262) is fixed to the cover case (232) and rotates together with the cover case (232).

The second outer gear (264) protrudes outward from the gear body (262) and receives power by engaging with the moving gear part (280). The second outer gear (264) is provided with a gear having an inclined surface facing toward the clutch hub (250) so as to engage with the second moving gear part (300) provided in the moving gear part (280).

A second outer gear (264) according to one embodiment of the present invention includes a first straight gear (266) and a first inclined gear (268). The first straight gear (266) is a gear that protrudes along the circumference of the second outer gear (264) and extends in the vertical direction.

The first inclined gear (268) is an inclined surface formed at the end of the first straight gear (266). When the first outer gear (254) of the clutch hub (250) is installed on the lower side of the second outer gear (264), the first inclined gear (268) is connected to the lower side of the first straight gear (266).

The first inclined gear (268) has a right triangle shape in its cross-section. The first inclined gear (268) forms an inclined surface toward the clutch hub (250). The first inclined gear (268) is installed in multiple numbers along the circumference of the gear body (262), and the inclination angles of the first inclined gears (268) installed in multiple numbers are the same.

The driving unit (270) is fixed to the case unit (230) and can be modified in various ways within the technical concept of supplying rotational power to move the moving gear unit (280). The driving unit (270) according to one embodiment of the present invention includes a driving body (272) and an output shaft (274). In addition, the driving unit (270) may further include a motor bracket (276) and a motor case (278).

The driving body (272) is fixed to the fixed case (234) and supplies rotational power. The driving body (272) can be directly fixed to the fixed case (234), and can also be fixed to the fixed case (234) using a motor bracket (276) and a motor case (278). The motor bracket (276) surrounds one side of the driving body (272) and is fixed to the fixed case (234). The motor case (278) forms an inner space for inserting the driving body (272) and is fixed to the fixed case (234).

The driving body (272) uses a motor, and the output shaft (274) protruding outwardly from the driving body (272) rotates by the operation of the driving body (272). The output shaft (274) protrudes outwardly from the driving body (272), rotates by the operation of the driving body (272), and is connected to the moving gear unit (280) to move the moving gear unit (280). The output shaft (274) according to one embodiment of the present invention is formed in the shape of a ball screw bar and is gear-coupled to the moving gear unit (280). Since the moving gear unit (280) is installed in a state where rotation is restricted, it moves in a straight direction by the rotation of the output shaft (274).

The moving gear unit (280) is moved by the power of the driving unit (270) and moves in a freewheel mode in which it engages with the clutch hub (250) and a non-freewheel mode in which it engages with the clutch hub (250) and the clutch gear (260) simultaneously.

The moving gear part (280) is arranged on the outside of the clutch hub (250) and transmits power by engaging only the clutch hub (250) or engaging both the clutch hub (250) and the clutch gear (260) simultaneously.

When the moving gear part (280) is only engaged with the clutch hub (250), the power for turning the pedal in the forward direction is transmitted to the cover case (232) through the rotating gear part (210) and the clutch bearing (240), so that the cover case (232) rotates. In addition, since the power for turning the pedal in the reverse direction only rotates the rotating gear part (210), the clutch hub (250), and the second moving gear part (300) of the moving gear part (280), the rotating power is not transmitted to the cover case (232). Accordingly, only when the rotating gear part (210) is rotated in the forward direction, the rotation of the clutch bearing (240) and the cover case (232) is synchronized, so that the freewheel adjustable wheel (200) is driven in the freewheel mode.

In addition, when the moving gear unit (280) is simultaneously engaged with the clutch hub (250) and the clutch gear (260) to synchronize the rotation, it operates in a non-freewheel mode. In the non-freewheel mode, the power of the pedal is transmitted in the order of the rotating gear unit (210), the clutch hub (250), the second moving gear unit (300), and the clutch gear (260). In addition, the power of the forward rotation may be transmitted in the order of the pedal power of the rotating gear unit (210), the clutch bearing (240), and the cover case (232). Since the second moving gear unit (300) that is simultaneously engaged with the clutch hub (250) and the clutch gear (260) transmits both the power of the forward rotation and the power of the reverse rotation, it operates in a non-freewheel mode.

A moving gear unit (280) according to one embodiment of the present invention includes a first moving gear unit (290) and a second moving gear unit (300). The first moving gear unit (290) is installed in a ring shape on the outside of a clutch hub (250) and is capable of various modifications within the technical concept of moving in a straight direction by receiving power from a driving unit (270). The first moving gear unit (290) according to one embodiment of the present invention includes a first assembly gear (292) and a second assembly gear (296).

The first assembly gear (292) and the second assembly gear (296) are assembled to each other and installed in a ring shape. The first assembly gear (292) is installed on one side of the clutch hub (250) and moves by the operation of the driving unit (270). The first assembly gear (292) extends along a curved shape, and a first engaging projection (294) is provided on the inside of the first assembly gear (292) to be inserted into a engaging groove (304) provided on the outside of the second moving gear unit (300).

In addition, a female screw hole is provided in the extension member (295) protruding outwardly from the first assembly gear (292), and the output shaft (274) provided in the driving unit (270) is inserted into the female screw hole provided in the extension member (295) to be connected to the gear. Accordingly, the first assembly gear (292) including the extension member (295) moves upward or downward depending on the rotational direction of the output shaft (274).

The second assembly gear (296) is installed on the other side of the clutch hub (250) and connected to the first assembly gear (292). The inner side of the second assembly gear (296) extending along a curved shape is provided with a second coupling projection (298) that is inserted into a coupling groove (304).

The first assembly gear (292) and the second assembly gear (296) are combined to form the first moving gear part (290), and the first moving gear part (290) moves to a position facing the clutch hub by the power of the driving part (270) or moves to a position where it engages with the clutch hub (250) and the clutch gear.

In addition, the first engaging projection (294) protruding inwardly of the first assembly gear (292) and the second engaging projection (298) protruding inwardly of the second assembly gear (296) are inserted into the engaging groove (304) formed on the outside of the second moving gear part (300), so that the second moving gear part (300) also moves along with the movement of the first moving gear part (290).

The second moving gear unit (300) is located on the inner side of the first moving gear unit (290) and has a gear that engages with the clutch hub (250) and the clutch gear (260).

The second moving gear part (300) is formed in a ring shape so as to be concentric with the clutch gear (260) and the clutch hub (250). The inner surface of the second moving gear part (300) includes an inner gear (306) formed in the form of an internal gear to mesh with the clutch hub (250) and the clutch gear (260).

The inner gear (306) moves to one side along the axial direction of the rotating gear portion (210) to engage only with the clutch hub (250), or moves to the other side along the axial direction of the rotating gear portion (210) to engage simultaneously with the clutch hub (250) and the clutch gear (260).

A second moving gear unit (300) according to one embodiment of the present invention includes a second moving gear body (302), a coupling groove unit (304), and an inner gear (306).

The second moving gear body (302) is installed in an annular shape. The outer diameter of the second moving gear body (302) is larger than the outer diameter of the clutch hub (250). The second moving gear body (302) is installed between the clutch hub (250) and the first moving gear part (290).

The engaging groove (304) can be modified in various ways within the technical concept of being coupled with the projection protruding inwardly of the moving gear part (280). The engaging groove (304) according to one embodiment of the present invention forms a groove in an annular shape along the outer circumference of the second moving gear body (302). The engaging groove (304) is coupled to the first engaging projection (294) and the second engaging projection, which are projections protruding inwardly of the first moving gear part (290). The engaging groove (304) forms a groove along an arc shape, and the first engaging projection (294) and the second engaging projection (298), which are fittedly coupled to the engaging groove (304), are also installed along an arc shape, so that the second moving gear part (300) can rotate on the inside of the first moving gear part (290). However, in a state where the first moving gear part (290) does not move along the axial direction of the rotating gear part (210), the second moving gear part (300) is prevented from moving along the axial direction of the rotating gear part (210).

The inner gear (306) protrudes in multiple ways along the inner circumference of the second moving gear body (302), and can be variously modified within the technical concept of meshing with the gear provided in the clutch gear (260) and the gear provided in the clutch hub (250). The inner gear (306) according to one embodiment of the present invention includes a second straight gear (308) and a second inclined gear (309).

The second straight gear (308) is a gear that protrudes along the inner circumference of the second moving gear body (302) and extends in the vertical direction.

The second inclined gear (309) is an inclined surface formed at the end of the second straight gear (308). When the clutch gear (260) is installed on the upper side of the clutch hub (250), the second inclined gear (309) is installed on the upper side of the second straight gear (308).

The inclined surface of the second inclined gear (309) is installed at an angle corresponding to the inclined surface of the first inclined gear (268). The second inclined gear (309) is formed in a right triangle shape. The second inclined gear (309) forms an inclined surface toward the first inclined gear (268). The second inclined gears (309) are installed in multiple numbers along the inner circumference of the second moving gear section (300), and the inclined angles of the second inclined gears (309) installed in multiple numbers are the same.

The shape of the second outer gear (264) provided in the clutch gear (260) is such that a one-way angle is applied, and the shape of the corresponding inner gear (306) is also such that a one-way angle is applied opposite to that of the second outer gear (264), so that when the moving gear part (280) moves upward, the inner gear (306) rotates in one direction and moves linearly in the up-and-down direction at the same time. Accordingly, the operation of the moving inner gear (306) engaging with the fixed second outer gear (264) to transmit power is performed quickly and accurately.

A bearing part (320) that rotatably supports a rotating part in a freewheel adjustable wheel (200) has a plurality of bearings. The bearing part (320) according to one embodiment of the present invention includes a wheel bearing part (322) and a shaft bearing (324).

The wheel bearing part (322) is installed between the inner rib (236) of the cover case (232) and the inner case (235) of the fixed case (234), so that friction occurring between the fixed case (234) whose rotation is restricted and the cover case (232) that rotates is reduced.

The shaft (220) bearing is installed between the shaft (220) and the rotating gear part (210) and reduces friction generated when the shaft (220) rotates.

The stator (310) is fixed to the fixed case (234) and is installed in a ring shape along the edge of the fixed case (234). The stator (310) applies a magnetic force to the cover case (232) to control the rotational load of the cover case (232). The stator (310) is fixed to the fixed case (234) and its rotation is restricted. The stator (310) is an electromagnet having a coil wound around an iron core. When power is applied to the coil, a magnetic force is generated in the stator (310). The magnetic strength of the stator (310) can be controlled by controlling the current applied to the coil of the stator (310).

When the magnetic force of the stator (310) increases, the rotational load of the cover case (232) increases, so that the pedaling force increases. When the magnetic force of the stator (310) decreases, the rotational load of the cover case (232) decreases, so that the pedaling force decreases. By adjusting the magnetic force of the stator (310), the rotational load of the cover case (232) can be adjusted, so that the user's pedaling force can be adjusted.

The stator (310) is fixed to a fixed case (234) so as not to rotate together with the cover case (232), and the fixed case (234) is fixed to the frame part (10). The fixed case (234) can be fixed to the frame part (10) by a fastening member such as a bolt or rivet. A rotating gear part (210) and a shaft (220) are installed to penetrate the center of the fixed case (234).

Since the stator (310) is arranged in a ring shape around the periphery of the fixed case (234), the stator (310) can be formed as large as possible as the radius of the stator (310) increases as much as possible. In addition, as the size of the stator (310) increases, the maximum magnetic force generated in the stator (310) can become larger, so the adjustment range of the rotational load applied to the cover case (232) can be further increased.

In addition, when the stator (310) is arranged in the radial direction of the moving gear unit (280) and the clutch hub (250), the installation thickness of the cover case (232) and the stator (310) can be significantly reduced. Accordingly, the thickness of the cover case (232) in the exercise bike (1) can be manufactured relatively thin to narrow the gap between the pedals on both sides, thereby significantly improving the design freedom of the exercise bike (1).

Hereinafter, the operation state of a freewheel adjustable wheel (200) and an exercise bike (1) equipped with the same according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

FIG. 8 is a cross-sectional view illustrating a state in which a freewheel-adjustable wheel (200) according to one embodiment of the present invention operates in freewheel mode, and FIG. 9 is a cross-sectional view illustrating a state in which power is transmitted in freewheel mode by a freewheel-adjustable wheel (200) according to one embodiment of the present invention.

As shown in FIGS. 8 and 9, when the second moving gear unit (300) is only engaged with the clutch hub (250), the power for rotating the clutch hub (250) is not transmitted to the cover case (232). And when the pedal is rotated in the forward direction, the rotating gear unit (210) also rotates in the forward direction. When the rotating gear unit (210) rotates in the forward direction, the power for rotating the rotating gear unit (210) is transmitted to the cover case (232) through the clutch bearing (240), so that the cover case (232) rotates in the forward direction. Therefore, the freewheel adjustable wheel (200) and the exercise bike (1) equipped therewith are operated in the freewheel mode.

FIG. 10 is a perspective view illustrating a state in which a freewheel-adjustable wheel (200) according to one embodiment of the present invention is operated in a non-freewheel mode, FIG. 11 is a perspective view illustrating a state in which a moving gear part (280) according to one embodiment of the present invention is connected to a clutch gear (260), FIG. 12 is a cross-sectional view illustrating a state in which a freewheel-adjustable wheel (200) according to one embodiment of the present invention is operated in a non-freewheel mode, and FIG. 13 is a cross-sectional view illustrating a state in which power is transmitted in a non-freewheel mode through a freewheel-adjustable wheel (200) according to one embodiment of the present invention.

As shown in FIGS. 10 to 13, when the second moving gear unit (300) is engaged with the clutch hub (250) and the clutch gear (260), the power for rotating the clutch hub (250) rotates the clutch gear (260) through the second moving gear unit (300). Since the clutch gear (260) is fixed to the cover case (232), the cover case (232) rotates together with the clutch gear (260).

Therefore, when the pedal is rotated in the forward or reverse direction, the rotating gear part (210) also rotates in the forward or reverse direction. Therefore, the freewheel adjustable wheel (200) and the exercise bike (1) equipped with the same are operated in the non-freewheel mode.

When a freewheel adjustable wheel (200) and an exercise bike (1) equipped with the same are in freewheel mode, noiselessness can be achieved through the operation of a clutch bearing (240).

When the freewheel adjustable wheel (200) and the exercise bike (1) equipped with the same are in freewheel mode, the clutch hub (250) and the clutch gear (260) rotate together by the second moving gear unit (300), so the cover case (232) rotates together with the rotating gear unit (210).

In addition, since the moving gear unit (280) including the second moving gear unit (300) and the driving unit (270) that moves the moving gear unit (280) are installed in one stage on the inside of the case unit (230), the size and thickness of the case unit (230) can be reduced, thereby increasing the degree of freedom in the design of the freewheel adjustable wheel (200).

In addition, since the driving unit (270) using a motor is installed on the inside of the freewheel adjustable wheel (200), the user can switch between the freewheel mode and the non-freewheel mode without getting off the exercise bike (1), thereby improving the convenience of use.

Although the present invention has been described with reference to the drawings as examples, it is obvious that the present invention is not limited to the embodiments and drawings disclosed in this specification, and that various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention. In addition, even if the effects according to the configuration of the present invention were not explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

1: Health bike
10: Frame 12: Outer frame 14: Inner frame 16: Side frame
20: Belt Absence
30: Rotating disc 31: Inner disc
40: Pedal section
50: Rotation support axis
60: Bass section
70: Seat housing section
80: Handle
90: Display section
100: Seat Post
110: Sheet
200: Freewheel adjustable wheel
210: Rotating gear part 212: Pulley part 214: Rotating body
220: Shaft
230: Case part 232: Cover case 233: Outer case 236: Inner rib 234: Fixed case 235: Inner case
240: Clutch bearing
250: Clutch hub 252: Hub body 254: First outer gear
260: Clutch gear 262: Gear body 264: Second outer gear 266: First straight gear 268: First inclined gear
270: Drive unit 272: Drive body 274: Output shaft 276: Motor bracket 278: Motor case
280: Moving gear section
290: 1st Mobile Gear Fishery
292: First assembly gear 294: First coupling projection 295: Extension member
296: Second assembly gear 298: Second coupling projection
300: 2nd mobile gear unit
302: Second moving gear body 304: Joining groove 306: Inner gear 308: Second straight gear 309: Second inclined gear
310: Stator
320: Bearing part 322: Wheel bearing part 324: Shaft bearing

Claims (20)

A rotating gear section that receives power from the pedal section and rotates, and has gears along the outer circumference;
A case portion that rotatably supports the above-mentioned rotating gear portion;
A clutch bearing installed between the rotating gear part and the case part, and transmitting power to the case part when the rotating gear part rotates in the forward direction;
A clutch hub fixed to the outside of the above rotating gear part and rotating together with the above rotating gear part;
A clutch gear which is installed in series with the above clutch hub and fixed to the case part;
A driving unit fixed to the above case and supplying rotational power; and
It includes a moving gear part that is moved by the power of the above driving part and moves in a freewheel mode that engages with the clutch hub and a non-freewheel mode that engages with the clutch hub and the clutch gear simultaneously;
The above moving gear part is a first moving gear part that is installed in a ring shape on the outside of the clutch hub and moves in a straight direction by receiving power from the driving part; and
A freewheel adjustable wheel including a second moving gear section located inside the first moving gear section and having a gear that engages with the clutch hub and the clutch gear.
In the first paragraph,
The above rotating gear part is a pulley part located on the outside of the case part and receives power from the pedal part through a belt; and
A freewheel adjustable wheel including a rotating body extending from the pulley member to the inside of the case member and rotating together with the pulley member.
In the second paragraph,
The above clutch hub is a hub body in the shape of a disk whose center coincides with the rotating body and is fixed to the outside of the rotating body; and
A freewheel adjustable wheel including a first outer gear having a projection shape extending in an up-down direction and installed along the outer circumference of the hub body.
In the first paragraph,
The case part rotates together with the clutch gear, receives rotational power through the clutch bearing, and is installed in a shape that surrounds the clutch bearing and the moving gear part; and
A freewheel adjustable wheel including a fixed case that supports the above driving unit and is installed in an opened portion of the cover case.
In paragraph 4,
The above clutch gear is installed in a ring shape on the inside of the cover case and has a gear body fixed to the cover case; and
A freewheel adjustable wheel including a second outer gear that protrudes outwardly from the gear body and engages with the moving gear section to transmit power.
In paragraph 4,
A freewheel adjustable wheel further comprising a stator fixed to the fixed case and installed in an annular shape along the perimeter of the fixed case, the stator generating magnetic force.
In paragraph 4,
The above driving unit comprises a driving body fixed to the fixed case and supplying rotational power; and
A freewheel adjustable wheel including an output shaft that protrudes outwardly from the driving body, rotates by the operation of the driving body, and is connected to the moving gear section to move the moving gear section.
delete In the first paragraph,
The first moving gear part is a first assembly gear installed on one side of the clutch hub and moved by the operation of the driving part; and
A second assembly gear is installed on the other side of the clutch hub and is connected to the first assembly gear;
The inner side of the first assembly gear is provided with a first coupling projection that is inserted into a coupling groove provided on the outer side of the second moving gear portion.
A freewheel adjustable wheel having a second engaging projection inserted into the engaging groove on the inner side of the second assembly gear.
In the first paragraph,
The above second moving gear part comprises a second moving gear body installed in a ring shape;
A groove is formed in an annular shape along the outer circumference of the second moving gear body, and a joining groove is joined with a projection protruding inwardly of the moving gear body; and
A freewheel adjustable wheel including an inner gear that protrudes inwardly from the second moving gear body and engages with a gear provided in the clutch gear and a gear provided in the clutch hub.
A rotating gear section that receives power from the pedal section and rotates, and has gears along the outer circumference;
A shaft installed horizontally through the inner side of the above rotating gear portion and fixed to the frame portion;
A cover case in which the above-mentioned rotating gear part and the above-mentioned shaft are installed through the center and are rotatably installed;
A fixed case installed in a shape that shields the opened portion of the above cover case and whose rotation is restricted;
A clutch bearing installed between the above-mentioned rotating gear part and the above-mentioned cover case, and transmitting power to the above-mentioned cover case when the above-mentioned rotating gear part rotates in the forward direction;
A clutch hub fixed to the outside of the above rotating gear part and rotating together with the above rotating gear part;
A clutch gear installed in series with the above clutch hub and fixed to the cover case;
A driving unit fixed to the above fixed case and supplying rotational power; and
It includes a moving gear part that is moved by the power of the above driving part and moves in a freewheel mode that engages with the clutch hub and a non-freewheel mode that engages with the clutch hub and the clutch gear simultaneously;
The above moving gear part is a first moving gear part that is installed in a ring shape on the outside of the clutch hub and moves in a straight direction by receiving power from the driving part; and
A freewheel adjustable wheel including a second moving gear section located inside the first moving gear section and having a gear that engages with the clutch hub and the clutch gear.
In Article 11,
The above rotating gear part is a pulley part located on the outside of the cover case and receives power from the pedal part through a belt; and
A freewheel adjustable wheel including a rotating body extending from the pulley member to the inside of the cover case and rotating together with the pulley member.
In Article 12,
The above clutch hub is a hub body in the shape of a disk whose center coincides with the rotating body and is fixed to the outside of the rotating body; and
A freewheel adjustable wheel including a first outer gear having a projection shape extending in an up-down direction and installed along the outer circumference of the hub body.
In Article 11,
The above clutch gear is installed in a ring shape on the inside of the cover case and has a gear body fixed to the cover case; and
A freewheel adjustable wheel including a second outer gear that protrudes outwardly from the gear body and engages with the moving gear section to transmit power.
In Article 11,
A freewheel adjustable wheel further comprising a stator fixed to the fixed case and installed in a ring shape along the perimeter of the fixed case, the stator generating magnetic force to adjust the rotational load of the cover case.
In Article 11,
The above driving unit comprises a driving body fixed to the fixed case and supplying rotational power; and
A freewheel adjustable wheel including an output shaft that protrudes outwardly from the driving body, rotates by the operation of the driving body, and is connected to the moving gear section to move the moving gear section.
delete In Article 11,
The first moving gear part is a first assembly gear installed on one side of the clutch hub and moved by the operation of the driving part; and
A second assembly gear is installed on the other side of the clutch hub and is connected to the first assembly gear;
The inner side of the first assembly gear is provided with a first coupling projection that is inserted into a coupling groove provided on the outer side of the second moving gear portion.
A freewheel adjustable wheel having a second engaging projection inserted into the engaging groove on the inner side of the second assembly gear.

In Article 11,
The above second moving gear part comprises a second moving gear body installed in a ring shape;
A groove is formed in an annular shape along the outer circumference of the second moving gear body, and a joining groove is joined with a projection protruding inwardly of the moving gear body; and
A freewheel adjustable wheel including an inner gear that protrudes inwardly from the second moving gear body and engages with a gear provided in the clutch gear and a gear provided in the clutch hub.
A frame section that supports the saddle and handlebar;
A pedal unit installed on a rotating disk installed on the side of the above frame unit;
A rotating gear part that receives power from the pedal part and rotates, and has gears provided along the outer circumference;
A case portion that rotatably supports the above-mentioned rotating gear portion;
A clutch bearing installed between the rotating gear part and the case part, and transmitting power to the case part when the rotating gear part rotates in the forward direction;
A clutch hub fixed to the outside of the above rotating gear part and rotating together with the above rotating gear part;
A clutch gear which is installed in series with the above clutch hub and fixed to the case part;
A driving unit fixed to the above case and supplying rotational power; and
It includes a moving gear part that is moved by the power of the above driving part and moves in a freewheel mode that engages with the clutch hub and a non-freewheel mode that engages with the clutch hub and the clutch gear simultaneously;
The above moving gear part is a first moving gear part that is installed in a ring shape on the outside of the clutch hub and moves in a straight direction by receiving power from the driving part; and
A freewheel adjustable wheel including a second moving gear section located inside the first moving gear section and having a gear that engages with the clutch hub and the clutch gear.

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