DRIVE MODULE FOR BICYCLE, CARGO MODULE FOR BICYCLE, AND CARGO BICYCLE

A drive module for a bicycle according to an aspect of the present invention, the drive module including a bicycle frame comprising a beam insertion hole into which a connecting beam is removably inserted, a main shaft rotatably provided on the bicycle frame, a rear wheel rotatably supported on the bicycle frame and configured to be rotated by rotational force from the main shaft, and a fork rotatably coupled to the bicycle frame.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit under 35 U.S.C. § 119 (a) of priority to Korean Patent Application No. 10-2023-0125698, filed on Sep. 20, 2023 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes.

BACKGROUND

Field

The present disclosure relates to a drive module for a bicycle, a cargo module for a bicycle detachably coupled to the drive module for a bicycle, and a cargo bicycle including the drive module for a bicycle and the cargo module for a bicycle.

Discussion of the Related Art

A cargo bicycle is a bicycle having a large and sturdy cargo area for carrying luggage. The cargo bicycle may be designed with three wheels so as to be ridden safely without losing balance, even when carrying a heavy load.

On the other hand, such a cargo bicycle is bulky and slow and therefore is unsuitable for exercising or recreational riding, even when unloaded. It is therefore necessary to purchase a two-wheel bicycle separately from the cargo bicycle.

A background technology of the present disclosure is disclosed in Japanese Patent Application Publication No. 2007-076400 (published on Mar. 29, 2007, entitled “Carrier with Bicycle”).

SUMMARY

Various embodiments are directed to a drive module for a bicycle suitable for use with both a two-wheeled bicycle and a cargo bicycle, a cargo module for a bicycle configured to be detachably coupled to the drive module for a bicycle to convert a regular bicycle into a cargo bicycle, and a cargo bicycle including the drive module for a bicycle and the cargo module for a bicycle.

According to the present disclosure, there is provided a drive module for a bicycle, the driving module including: a bicycle frame including a beam insertion hole into which a connecting beam is removably inserted; a main shaft rotatably provided on the bicycle frame; a rear wheel rotatably supported on the bicycle frame and configured to be rotated by rotational force from the main shaft; and a fork rotatably coupled to the bicycle frame.

The drive module may further include: an electric actuator configured to rotate the main shaft using electrical energy; and a main battery storing electrical energy to be supplied to the electric actuator.

The connecting beam may include a beam-side terminal for an electrical connection. The bicycle frame may include therein a hole-side terminal for an electrical connection. When the connecting beam is inserted into the beam insertion hole, the beam-side terminal and the hole-side terminal may contact each other to establish an electrical connection.

The drive module may further include a coupling pin configured to extend through the bicycle frame and the connecting beam to prevent the connecting beam from being removed from the beam insertion hole.

According to the present disclosure, also provided is a cargo module for a bicycle, the cargo module including: a base; a connecting beam protruding from the base and configured to be inserted into a beam insertion hole provided in a drive module for a bicycle; a fork connecting part configured such that one side thereof is rotatably supported on the base and the other side thereof is detachably coupled to the drive module for the bicycle; a pair of cargo front wheels disposed on both sides of the base in a widthwise direction with a space therebetween; and a steering unit configured to change a steering angle of the pair of cargo front wheels to correspond to a rotation angle of the fork connecting part.

The cargo module may further include an auxiliary battery storing electrical energy.

The drive module for the bicycle may include therein a hole-side terminal for an electrical connection. The connecting beam may include a beam-side terminal for an electrical connection. When the connecting beam is inserted into the beam insertion hole, the beam-side terminal and the hole-side terminal may contact each other to establish an electrical connection.

According to the present disclosure, also provided is a cargo bicycle including: a drive module for a bicycle, wherein the driving module includes a bicycle frame including a beam insertion hole, a main shaft rotatably provided on the bicycle frame, a rear wheel rotatably supported on the bicycle frame and configured to be rotated by rotational force from the main shaft, and a fork rotatably coupled to the bicycle frame; and a cargo module for a bicycle, wherein the cargo module includes a base, a connecting beam protruding from the base and configured to be inserted into the beam insertion hole, a fork connecting part configured such that one side thereof is rotatably supported on the base and the other side thereof is detachably coupled to the fork, a pair of cargo front wheels disposed on both sides of the base in a widthwise direction with a space therebetween, and a steering unit configured to change a steering angle of the pair of cargo front wheels to correspond to a rotation angle of the fork connecting part.

The drive module for the bicycle may further include: an electric actuator configured to rotate the main shaft using electrical energy; and a main battery storing electrical energy to be supplied to the electric actuator.

The cargo module for the bicycle may further include an auxiliary battery storing electrical energy to be supplied to the electric actuator.

The drive module for the bicycle may include a hole-side terminal disposed within the bicycle frame. The cargo module for the bicycle may include a beam-side terminal disposed on the connecting beam. When the connecting beam is inserted into the beam insertion hole, the beam-side terminal and the hole-side terminal may contact each other to establish an electrical connection so that the main battery and the auxiliary battery are connected to each other in parallel.

The drive module for the bicycle may further include an electric actuator configured to rotate the main shaft using electrical energy, a main battery storing electrical energy to be supplied to the electric actuator, and a hole-side terminal disposed within the drive module for the bicycle. The cargo module for the bicycle may further include an auxiliary battery storing electrical energy to be supplied to the electric actuator and a beam-side terminal disposed on the connecting beam. When the connecting beam is inserted into the beam insertion hole, the beam-side terminal and the hole-side terminal may contact each other to establish an electrical connection so that the main battery and the auxiliary battery are connected to each other in parallel.

The drive module for the bicycle may further include a coupling pin configured to extend through the bicycle frame and the connecting beam to prevent the connecting beam from being removed from the beam insertion hole.

According to the present disclosure as set forth above, a user may use a cargo bicycle by coupling the drive module for the bicycle and the cargo module for the bicycle or use a recreational or transportation two-wheeled bicycle by coupling a front wheel to the drive module for the bicycle. Accordingly, costs may be reduced compared to the case in which the user purchases a cargo bicycle and a separate two-wheeled bicycle.

The cargo bicycle in which the drive module for the bicycle including the electric actuator and the main battery according to embodiments of the present disclosure and the cargo module for the bicycle including the auxiliary battery according to embodiments of the present disclosure are coupled may be used in a motorized mode for an extended time and carry heavy loads over long distances in an easy manner.

In the cargo bicycle according to embodiments of the present disclosure, the drive module for the bicycle further includes the hole-side terminal, the cargo module for the bicycle further includes the beam-side terminal, and when the connecting beam is fixedly inserted into the beam insertion hole, the hole-side terminal and the beam-side terminal contact each other to establish an electrical connection. After the connecting beam is inserted into the beam insertion hole and the connecting beam is fixed using the coupling pin, additional work of connecting the connector of the drive module for the bicycle and the connector of the cargo module for the bicycle is not required. Accordingly, conversion to the cargo bicycle may be facilitated, and the bicycle may be ridden safely without any accident in which the connectors are disconnected during the operation of the cargo bicycle.

DETAILED DESCRIPTION

Hereinafter, a drive module for a bicycle, a cargo module for a bicycle, and a cargo bicycle according to embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The terminologies used herein are intended to adequately describe exemplary embodiments of the present disclosure, and may vary depending on the intention of a user or an operator, practices of the art to which the present disclosure pertains, and the like. Therefore, the terminologies should be defined on the basis of the contents of the entire specification.

FIG.1is a left side view illustrating a cargo bicycle according to an embodiment of the present disclosure,FIG.2is a right side view illustrating the cargo bicycle according to an embodiment of the present disclosure,FIG.3is a perspective view of the cargo bicycle according to an embodiment of the present disclosure, viewed from the left,FIG.4is a perspective view of the cargo bicycle according to an embodiment of the present disclosure, viewed from the right,FIG.5is a perspective view illustrating the drive module for the bicycle according to an embodiment of the present disclosure,FIG.6is a perspective view illustrating the cargo module for the bicycle according to an embodiment of the present disclosure,FIG.7is a plan view illustrating the cargo module for the bicycle according to an embodiment of the present disclosure, in which a central link, a left link, and a right link are indicated with solid lines,FIG.8is a longitudinal cross-sectional view illustrating the cargo bicycle according to an embodiment of the present disclosure,FIG.9is an enlarged cross-sectional view illustrating part A inFIG.8, andFIG.10is an enlarged cross-sectional view illustrating a part ofFIG.8cut along line B-B. In at least some figures ofFIGS.1to10, not all configurations included in the cargo bicycle are illustrated, and some configurations may be omitted for ease of description and illustration.

Referring toFIGS.1to10, a cargo bicycle10according to an embodiment of the present disclosure includes a drive module100for a bicycle and a cargo module300for a bicycle configured to be detachably coupled to the drive module100for the bicycle. The drive module100for the bicycle (hereinafter, referred to as the “drive module”) includes a bicycle frame120, a main shaft180, a rear wheel101, and a fork160.

The bicycle frame120may include a center post121, a fork coupler140, a main shaft coupler130, a rear wheel coupler145, a seat support150, an upper reinforcement153, and a lower reinforcement156.

The center post121extends vertically and is inclined with respect to the vertical direction. The fork coupler140may be provided on the upper end portion of the center post121, while the main shaft coupler130may be provided on the lower end portion of the center post121.

The rear wheel coupler145may be provided behind the main shaft coupler130. The seat support150may protrude upward from the main shaft coupler130with a backward inclination.

The upper reinforcement153may connect the fork coupler140and the rear wheel coupler145to enhance the strength of the bicycle frame120. The lower reinforcement156may connect the main shaft coupler130and the rear wheel coupler145to increase the strength of the bicycle frame120.

The main shaft180may be rotatably disposed on the bicycle frame120. Specifically, the main shaft180may be supported on the main shaft coupler130to extend through the main shaft coupler130in the transverse direction.

The rear wheel101is rotatably supported on the bicycle frame120and is rotated by the rotational force of the main shaft180. The rear wheel101may be rotatably coupled to the rear wheel coupler145. Although the bicycle drive module100only including a single rear wheel101is illustrated in the figures, this is for illustrative purposes only, and the bicycle drive module of the present disclosure may include a plurality of rear wheels.

The drive module100may further include a pedal115, a drive sprocket, a driven sprocket, a chain, and a seat105.

The pedal115may be coupled to the main shaft180. The drive sprocket may be fixedly coupled to the main shaft180to coaxially rotate as the main shaft180rotates.

The driven sprocket may be fixedly coupled to the rear wheel shaft serving as the center of rotation of the rear wheel101. As the driven sprocket rotates, the rear wheel101may rotate along with the driven sprocket. The chain may be fastened around both the drive sprocket and the driven sprocket and connect the drive sprocket and the driven sprocket to transmit the rotational force from the drive sprocket to the driven sprocket.

When a user depresses the pedal115, the main shaft180rotates, and the rotational force from the main shaft180is transmitted to the rear wheel101via the drive sprocket, the chain, and the driven sprocket, thereby rotating the rear wheel101. The seat105is configured to support the buttocks of the user, and may be coupled to and supported on the upper end portion of the seat support150.

The fork160is rotatably coupled to the bicycle frame120. The fork160may include a joint161, a steering handle coupling tube163, and a pair of fork prongs165.

The joint161extends through the fork coupler140upward and downward and is rotatably coupled to the bicycle frame120. The steering handle coupling tube163extends upward from the joint161. The fork160may rotate along a first axis RX1 extending in the longitudinal direction of the steering handle coupling tube163.

The pair of fork prongs165are spaced away from each other while extending downward from the joint161.

The pair of fork prongs165extend downward from the joint161and are spaced away from each other. A fork connecting part350of the cargo module300for the bicycle described below may be detachably coupled to lower end portions167of the pair of fork prongs165. A front wheel (not shown) may be detachably coupled to the lower end portions167of the pair of fork prongs165, in place of the fork connecting part350.

The drive module100may further include a steering handle110. The steering handle110may be coupled to and supported on the upper end portion of the steering handle coupling tube163. When the steering handle110rotates to the left or right, the fork160may rotate along with the first axis RX1, and cargo front wheels301and303of the cargo module300for the bicycle described below may be steered in a direction and angle of rotation corresponding to the direction and angle of rotation of the fork160.

The drive module100may further include an electric actuator170, a main battery230, and a controller235. The electric actuator170may rotate the main shaft180using electrical energy. The electric actuator170may be disposed in the interior space of the main shaft coupler130. The electric actuator170may include a motor providing rotational power to the main shaft180.

The main battery230may store electrical energy to be supplied to the electric actuator170. For example, the main battery230may be disposed within a center post121of the bicycle frame120. The main battery230may be removably disposed in a battery compartment inside the center post121. The center post121may include a battery cover122openable to expose the battery compartment.

The controller235may control the operation of the electric actuator170. For this purpose, the controller235may control current supplied to the electric actuator170from the main battery230or an auxiliary battery305of the cargo module300for the bicycle described below.

The controller235may further include a parallel connecting converter connecting the main battery230and the auxiliary battery305when the cargo module300for the bicycle is coupled to the drive module100. For example, the controller235may be disposed within the center post121.

The cargo module300for the bicycle (hereinafter, referred to as a “cargo module”) may include a base310, a connecting beam340, the fork connecting part350, a pair of cargo front wheels301and303, and a steering unit360. The base310may include a center bar311, a cargo frame315, a lower front wheel frame320, and an upper front wheel frame325.

The center bar311is a tubular member having a circular cross-section, and extends in the front-back direction. The cargo frame315is a component supporting a cargo basket307, and is fixedly coupled to the center bar311. The cargo frame315may include a pallet part316above the center bar311and connecting beams317connecting the pallet part316to the center bar311.

The lower front wheel frame320and the upper front wheel frame325may extend in a direction intersecting the center bar311, i.e., in the left and right direction. The lower front wheel frame320may be disposed below the center bar311, while the upper front wheel frame325may be disposed above the center bar311and below the pallet part316.

The lower front wheel frame320and the upper front wheel frame325may be connected to the center bar311so as to be rotatable about the center bar311. Specifically, the lower front wheel frame320and the upper front wheel frame325may be supported on the center bar311by means of an intermediate bracket330, a front bracket332, and a rear bracket334through which the center bar311is threaded.

The intermediate bracket330may have the upper portion coupled to the upper front wheel frame325and the lower portion coupled to the lower front wheel frame320, with a portion thereof between the upper and lower ends being threaded by the center bar311. The front bracket332may have the lower portion coupled to the lower front wheel frame320and the upper portion threaded by the center bar311. The rear bracket334may have the upper portion coupled to the upper front wheel frame325and the lower portion threaded by the center bar311.

The base310may further include a pair of shock absorbers336connecting the lower front wheel frame320and the upper front wheel frame325in a bufferable manner

The connecting beam340protrudes backward from the base310. Specifically, the connecting beam340protrudes and extends backward from the rear end of the center bar311. The rear end portion of the connecting beam340is removably inserted into a beam insertion hole190provided in the bicycle frame120.

Although only a single beam insertion hole190is provided in the main shaft coupler130inFIGS.1,2, and8to10, this is for illustrative purposes only, and the present disclosure is not limited to this structure. For example, the beam insertion hole may be provided in the fork coupler140located higher than the main shaft coupler130, and the connecting beam may be inserted into the beam insertion hole provided in the fork coupler140. Alternatively, beam insertion holes may be provided in the main shaft coupler130and the fork coupler140, and a pair of connecting beams may be inserted into the beam insertion hole provided in the main shaft coupler130and the beam insertion hole provided in the fork coupler140, respectively.

The fork connecting part350has one side rotatably supported on the base310and the other side detachably coupled to the fork160. The fork connecting part350may include a base penetration pin351, a fork coupling tube353, a joint355, and a lower finger357.

The base penetration pin351extends with an inclination and penetrates the center bar311. The fork connecting part350may rotate about a second axis RX2 extending in the longitudinal direction of the base penetration pin351. The fork coupling tube353may extend in a horizontal direction perpendicular to the second axis RX2, and left and right ends thereof may be fitted around the fork160, specifically, the lower end portions167of the pair of fork prongs165, respectively.

The fork coupling tube353may be firmly coupled to the lower end portions167of the pair of fork prongs165, for example, in a through-axle manner. The fork coupling tube353is located above the base penetration pin351.

The joint355connects the fork coupling tube353and the base penetration pin351. The lower finger357protrudes from the lower end portion of the base penetration pin351in a direction perpendicular to the second axis RX2. When the fork coupling tube353is coupled to the fork160, the first axis RX1 and the second axis RX2 are connected in a straight line.

Accordingly, when the user rotates the steering handle110to the left or right about the first axis RX1, the fork connecting part350may rotate in the same direction and at the same angle about the second axis RX2.

The pair of cargo front wheels301and303are disposed on both sides of the base310in the widthwise direction with a space therebetween. Specifically, a left steering knuckle370may be coupled to the left end portions of the upper front wheel frame325and the lower front wheel frame320by means of a pair of ball joints, and a right steering knuckle375may be coupled to the right end portions of the upper front wheel frame325and the lower front wheel frame320by means of a pair of ball joints.

The left cargo front wheel301may be rotatably coupled to the left steering knuckle370, and the right cargo front wheel303may be rotatably coupled to the right steering knuckle375. Accordingly, the left cargo front wheel301may be steered and rotated about a left axis RX4 connecting the pair of ball joints of the left steering knuckle370. The right cargo front wheel303may be steered and rotated about a right axis RX5 connecting the pair of ball joints of right steering knuckle375.

The steering unit360changes the steering angle of the pair of cargo front wheels301and303to correspond to the rotation angle of the fork connecting part350centered on the second axis RX2.

The steering unit360may include the left steering knuckle370, the right steering knuckle375, a central steering part361, a center link380, a left steering link383, and a right steering link386.

The central steering part361may extend through the center bar311of the base310and be rotatably supported on the center bar311. The central steering part361may include a base coupling pin362, a lower finger364, a left upper finger367, and a right upper finger368.

The base coupling pin362may extend along a third axis RX3 in the vertical direction and through the center bar311upward and downward. The lower finger364protrudes from the lower end portion of the base coupling pin362in a direction perpendicular to the third axis RX3.

The left upper finger367may protrude rearwardly to the left with an inclination from the upper end portion of the base coupling pin362while being perpendicular to the third axis RX3, and the right upper finger368may protrude rearwardly to the right with an inclination from the upper end portion of the base coupling pin362while being perpendicular to the third axis RX3. The left upper finger367and the right upper finger368may be provided as a single member, as illustrated inFIG.7, or may be provided as a pair of separate members, differing from the illustration inFIG.7.

When the base coupling pin362rotates about the third axis RX3, the lower finger364, left upper finger367, and right upper finger368may rotate together in the same direction and at the same angle.

The center link380may connect the lower finger357of the fork connecting part350and the lower finger364of the central steering part361. In other words, one end portion of the center link380may be connected to the lower finger357of the fork connecting part350by means of a ball joint, while the other end portion of the center link380may be connected to the lower finger364of the central steering part361by means of a ball joint.

The left steering link383may connect the left upper finger367of the central steering part361and the left steering knuckle370, while the right steering link386may connect the right upper finger368of the central steering part361and the right steering knuckle375.

In other words, one end portion of the left steering link383may be connected to the left upper finger367of the central steering part361by means of a ball joint, while the other end portion of the left steering link383may be connected to the rear end portion of the left steering knuckle370by means of a ball joint. One end portion of the right steering link386may be connected to the right upper finger368of the central steering part361by means of a ball joint, while the other end portion of the right steering link386may be connected to the rear end portion of the right steering knuckle375by means of a ball joint.

The left steering knuckle370and the right steering knuckle375have already been described, and thus a repeated description thereof will be omitted. With this configuration, when the fork connecting part350rotates to the left or right about the second axis RX2 in response to the user rotating the steering handle110to the left or right, the central steering part361rotates to the left or right about the third axis RX3.

In addition, the left steering knuckle370and the left cargo front wheel301supported thereon and the right steering knuckle375and the right cargo front wheel303supported thereon may rotate together to the left or right to the same angle. Consequently, the cargo bicycle10may be steered to the left or right.

The cargo bicycle10may further include the cargo basket307and the auxiliary battery305. The cargo basket307designed for holding luggage may be detachably supported or seated on the pallet portion316of the cargo frame315. The bicycle10may further include a baby seat designed for seating an infant or a child thereon, in place of the cargo basket307.

The auxiliary battery305may store therein electrical energy supplied to the electric actuator170. For example, the auxiliary battery305may be disposed in a hollow space provided in the cargo frame315. For example, the auxiliary battery305may be disposed below the pallet part316and located between the pallet part316and the center bar311.

The drive module100for the bicycle may further include a coupling pin210. When the connecting beam340is inserted into the beam insertion hole190through an opening132open forwardly to the bicycle frame120, the coupling pin210may extend through the bicycle frame120and the connecting beam340and be fixed to the bicycle frame120to prevent the connecting beam340from being removed from the beam insertion hole190.

The connecting beam340may have a pinhole342through which the coupling pin210extends. A plurality of coupling pins210may be provided, and a plurality of pinholes342, the number of which corresponds to the number of the coupling pins210, may be also provided.

Each of the coupling pins210may include a head211, a body213, a handle212, and a fixing portion214. The body213may be a cylindrical portion having a predetermined diameter, and may extend in a direction in which the body213extends through the pinhole342. The head211may be provided on one end portion of the body213and have a diameter greater than the diameter of the body213to prevent the body213from extending through the pinhole342.

The handle212is a portion to be grasped when the user intends to inserted the coupling pin210into the pinhole342. The handle may be connected to head211. The fixing portion214is detachably coupled to the bicycle frame120to prevent the coupling pin210from being unintentionally detached from the bicycle frame120. The fixing portion214may be provided on the other end portion of the body213.

The bicycle frame120may have a pin through-hole135allowing the body213of the coupling pin210to extend therethrough. The bicycle frame120may be provided with a fixing portion receptacle137to which the fixing portion214of the coupling pin210is detachably coupled. The pin through-hole135and the fixing portion receptacle137are components of the bicycle frame120, and may be provided in an internal guide134limiting the beam insertion hole190.

The user inserts the connecting beam340into the beam insertion hole190through the opening132, and pushes the connecting beam340into the beam insertion hole190so that the pin through-hole135and pinhole342are aligned. Then, the user grasps the handle212of the coupling pin210, pushes the coupling pin210so that the fixing portion214reaches the fixing portion receptacle137through the pin through-hole135and the pinhole342, and rotates the handle212in a single direction about the body213so that the fixing portion214is coupled to the fixing portion receptacle137.

The user may use the cargo bicycle10by coupling the cargo module300for the bicycle to the drive module100for the bicycle in this manner.

The cargo module300for the bicycle may further include a beam-side terminal345provided on the connecting beam340, while the drive module100for the bicycle may further include a hole-side terminal200provided within the bicycle frame120.

For example, the beam-side terminal345may be disposed on the distal end portion of the connecting beam340, and when the connecting beam340is inserted into the beam insertion hole190, the hole-side terminal200may be disposed at an internal point of the bicycle frame120facing the beam-side terminal345. Accordingly, when the connecting beam340is inserted into the beam insertion hole190, the beam-side terminal345and the hole-side terminal200contact each other to establish an electrical connection, and thus the main battery230and the auxiliary battery305may be connected in parallel.

In other words, after the connecting beam340is inserted into the beam insertion hole190and the connecting beam340is fixed using the coupling pin210, the main battery230, the controller235, and the auxiliary battery305may be electrically connected without additional work of connecting a connector of the drive module100for the bicycle and a connector of the cargo module300for the bicycle.

The hole-side terminal200may be supported on an internal guide202fixed on the inner surface of the bicycle frame120. The internal guide202may guide the distal end portion of the connecting beam340so that the beam-side terminal345is aligned with the hole-side terminal200. In addition, the internal guide202may include a buffering portion made of an elastic material to absorb shock when the beam-side terminal345collides with the hole-side terminal200.

The positions of the beam-side terminal345and the hole-side terminal200illustrated inFIGS.9and10are illustrative, and the present disclosure is not limited to the positions of the beam-side terminal345and the hole-side terminal200illustrated inFIGS.9and10. For example, the beam-side terminal may be disposed on a side surface of the connecting beam340, and the hole-side terminal may be disposed on the internal guide134defining the beam insertion hole190to contact the beam-side terminal.

In addition, after the connecting beam340is removed from the beam insertion hole190and the fork connecting part350is disconnected from the fork160, the user may use a two-wheeled bicycle in which the drive module100for the bicycle is coupled to the front wheel by detachably coupling a front wheel (not shown), the size of which corresponds to the size of the rear wheel101, to the fork160.

According to the present disclosure as set forth above, the user may use the cargo bicycle10by coupling the drive module100for the bicycle and the cargo module300for the bicycle or use the recreational or transportation two-wheeled bicycle by coupling a front wheel (not shown) to the drive module100for the bicycle. Accordingly, costs may be reduced compared to the case in which the user purchases the cargo bicycle10and a separate two-wheeled bicycle.

According to the present disclosure, the main battery230is provided on the drive module100for the bicycle and the auxiliary battery305is provided on the cargo module300for the bicycle, so the cargo bicycle10may be used in a motorized mode for an extended time and carry heavy loads over long distances in an easy manner.

In the cargo bicycle10according to the present disclosure, the drive module100for the bicycle includes the hole-side terminal200and the cargo module300for the bicycle includes the beam-side terminal345, and when the connecting beam340is fixedly inserted into the beam insertion hole190, the hole-side terminal200and the beam-side terminal345contact each other to establish an electrical connection.

Accordingly, after the connecting beam340is inserted into the beam insertion hole190and the connecting beam340is fixed using the coupling pin210, additional work of connecting the connector of the drive module100for the bicycle and the connector of the cargo module300for the bicycle is not required. Accordingly, conversion to the cargo bicycle10may be facilitated, and the bicycle may be ridden safely without any accident in which the connectors are disconnected during the operation of the cargo bicycle10.

While the present disclosure has been described with respect to the embodiments illustrated in the drawings, such embodiments are provided by way of example only. It will be understood by those skilled in the art that various modifications and other equivalent embodiments are possible therefrom. Therefore, the technical protection scope of the present disclosure should be defined by the following claims.