TWI629201B - Electric bicycle - Google Patents

Abstract

The electric bicycle comprises a frame and a battery, wherein the frame comprises a lower tube and a seat tube, and the lower tube and the seat tube are arranged front and rear to define a frame space between the lower tube and the seat tube, and the lower tube extends obliquely downward and has The through hole penetrates the lower tube; the battery can be selectively disposed in the frame space corresponding to the through hole, and the battery enters or leaves the frame space through the through hole when the battery is loaded or unloaded.

Description

electric bicycle

The present invention generally relates to an electric bicycle. Specifically, the present invention relates to an electric bicycle in which a through hole is opened in a lower tube to facilitate loading and unloading of a battery.

Today's bicycles have changed from the original means of transportation to one of the tools to promote a healthy and healthy life. However, not everyone's physical ability can afford long-distance routes or difficult climbing sections, so electric bicycles with auxiliary power are born.

Generally, an electric bicycle uses a battery as a power source of the electric motor, and the battery is usually attached to the frame of the bicycle or a slot corresponding to the battery is provided on the frame for accommodating the battery. However, the installation of the battery on the frame in an attached manner usually requires an additional battery loading mechanism, which makes the structure of the bicycle relatively complicated and affects the overall design of the bicycle. Furthermore, in order to extend the running time of the auxiliary power, the capacity and size of the battery are correspondingly increased, so that the slot provided by the battery for accommodating the battery is correspondingly increased, so that the overall structure of the frame is relatively weakened. In addition, the general battery is usually disposed above the frame horizontally along the upper tube of the frame, or is erected along the seat tube of the frame, so that the overall center of gravity of the bicycle is high, and it is easy to fall due to the unstable center of gravity.

Therefore, how to make the battery have a better setting position without significantly affecting the frame structure is one of the important research and development directions.

An object of the present invention is to provide an electric bicycle that can be opened in a lower tube. The through hole for the battery to pass through, so as to facilitate the loading and unloading of the battery on the frame, and the frame will not be significantly weakened by the arrangement of the through hole.

Another object of the present invention is to provide an electric bicycle that is disposed at a center position of the frame and close to the driver of the electric bicycle, so that the center of mass of the electric bicycle can be maintained at the center, and the wiring design of the circuit can be simplified.

In one embodiment, the present invention provides an electric bicycle including a frame and a battery, wherein the frame includes a lower tube and a seat tube, and the lower tube and the seat tube are disposed front and rear to define a frame space between the lower tube and the seat tube. The lower tube extends obliquely downward and has a through hole penetrating through the lower tube; the battery can be selectively disposed in the frame space corresponding to the through hole, and when the battery is loaded or unloaded, the battery enters or leaves the frame space through the through hole.

In another embodiment, the present invention provides an electric bicycle including a seat tube, a lower tube and a battery, wherein the seat tube has a lower end; the lower tube extends obliquely toward the lower end of the seat tube, and the lower tube has a through hole, a rear surface of the lower tube and a front tube The surface defines a frame space between the rear surface of the lower tube and the seat tube, and the through hole penetrates the lower tube. The through hole has a rear opening at the rear surface of the lower tube, and the through hole has a front opening at the front surface of the lower tube, and the front opening And the through-shaft of the rear opening defines a storage trajectory extending through the frame space; the battery can be selectively disposed in the frame space corresponding to the through hole; wherein when the battery is loaded or unloaded, the battery enters or leaves the frame space along the storage trajectory .

In an embodiment, the electric bicycle of the present invention further includes an auxiliary lower tube, wherein the auxiliary lower tube is connected between the lower tube and the seat tube, and the lower tube extends obliquely upward relative to the auxiliary lower tube when the battery is disposed in the frame space. The auxiliary lower tube is used to support the battery.

In an embodiment, the auxiliary lower tube has a receiving groove for receiving the battery.

In an embodiment, the auxiliary lower tube has a fixing portion when the battery is disposed in the frame space The fixing portion is used to position the battery.

In an embodiment, the electric bicycle of the present invention further includes a battery contact portion, wherein the battery contact portion is disposed on the seat tube, and when the battery is disposed in the frame space, the battery is electrically connected to the battery contact portion.

In one embodiment, the seat tube has an opening, the battery contact portion is disposed in the seat tube, and the battery insertion opening is electrically connected to the battery contact portion.

In an embodiment, the electric bicycle of the present invention further includes a stopper, wherein the stopper is disposed in the lower tube corresponding to the through hole to selectively block the battery from coming out of the through hole. In one embodiment, the stop includes a baffle that selectively obscures the through hole.

In an embodiment, the frame further comprises a front fork tube, wherein the upper end of the front fork tube is connected to the upper end of the lower tube, and the lower end of the front fork tube is substantially a U-shaped structure formed by connecting two fork tubes, when the battery is loaded and unloaded, the battery Pass between the two forks to enter or leave the frame space.

In an embodiment, the electric bicycle of the present invention further comprises a front fork tube, wherein the upper end of the front fork tube is connected to the upper end of the lower tube, and the lower end of the front fork tube is substantially a U-shaped structure formed by connecting two fork tubes, and the storage track extends Pass between the two forks.

In one embodiment, the electric bicycle of the present invention further includes a driver, wherein the driver is disposed under the battery to support the battery, and the battery is electrically connected to the driver through the battery contact portion.

In one embodiment, the electric bicycle of the present invention further includes a driver, wherein the driver is disposed below the auxiliary down tube to electrically connect the battery.

In one embodiment, when the battery is disposed in the frame space, the battery is placed across the lower tube and the seat tube, and the front end of the battery enters the through hole to be partially accommodated in the lower tube and substantially does not protrude from the through hole.

In an embodiment, when the battery is disposed in the frame space, the front end of the battery enters The opening is not substantially protruded from the front opening.

In an embodiment, the electric bicycle of the present invention further comprises an auxiliary lower tube, wherein the auxiliary lower tube is connected to the lower tube and extends toward the lower end of the seat tube, the lower tube extends obliquely upward with respect to the auxiliary lower tube, and the auxiliary lower tube has a long axis The storage track is substantially parallel to the long axis.

In one embodiment, the storage trajectory is a linear trajectory. When the battery moves along the accommodating trajectory toward the seat tube, the battery can enter from the front opening, and protrudes from the rear opening to set the battery in the frame space; when the battery is stored along the storage The trajectory moves away from the seat tube, and the battery can enter from the rear opening and escape from the front opening, so that the battery can be separated from the frame space.

In one embodiment, the storage track is a V-shaped track. When the battery is installed, the battery enters from the rear opening and protrudes from the front opening, and rotates downward in the through hole and moves backward to be disposed in the frame space; In the case of a battery, the battery can enter from the rear opening and protrude from the front opening, and rotate upward in the through hole and move backward to disengage the frame space.

In an embodiment, the electric bicycle of the present invention further comprises an inner surface elastic body, wherein the inner surface elastic body is disposed in the through hole, and when the battery is disposed in the frame space, the front end of the battery stays in the through hole, and the inner surface elastic body surrounds the ring. The front end of the battery assists in securing the battery; when the battery is to be installed or removed, the inner elastomer is deformed to allow the battery to rotate up or down in the through hole.

Compared with the prior art, the electric bicycle of the present invention has a better setting position of the battery without significantly affecting the structural strength of the frame, thereby maintaining the center of mass of the electric bicycle in the center to enhance the stability of the electric bicycle and Controllability, at the same time, through the through hole opened by the lower tube, can facilitate the loading and unloading of the battery, and can enhance the design flexibility of the electric bicycle to achieve product differentiation.

1‧‧‧Electric bicycle

10, 10'‧‧‧ frame

101‧‧‧frame space

110, 110’‧‧‧Under the tube

110a‧‧‧Down tube rear surface

110b‧‧‧Front surface of the lower tube

112‧‧‧through hole

112a‧‧‧opening

112b‧‧‧ front opening

120‧‧‧ seat tube

122‧‧‧Bottom

124‧‧‧ openings

130‧‧‧Upper tube

140‧‧‧Assisted down tube

142‧‧‧ accommodating slots

144‧‧‧ fixed department

150‧‧‧Front fork

152‧‧‧fork

20‧‧‧Battery

22‧‧‧Electrical contacts

24‧‧‧ sloped surface

30a‧‧‧ Rear wheel

30b‧‧‧front wheel

40‧‧‧Fixed parts

42‧‧‧ Positioning Department

50‧‧‧Battery Contact Department

60‧‧‧ drive

70‧‧‧stops

80‧‧‧Locker

82‧‧‧ key

90‧‧‧Inner elastomer

S1, S2‧‧‧ storage track

S21‧‧‧First storage track segment

S22‧‧‧Second storage track segment

1A to 1C are schematic views of electric bicycles in different states according to an embodiment of the present invention.

2 is a schematic view of an electric bicycle according to another embodiment of the present invention.

3A to 3C are schematic views showing another storage trajectory of the electric bicycle loading and unloading battery of the present invention.

4A to 4C are schematic views showing another storage trajectory of the electric bicycle loading and unloading battery of the present invention.

5A and 5B are partial enlarged views of another embodiment of the present invention.

Figure 6 is a partial enlarged view of still another embodiment of the present invention.

Figure 7 is a schematic view of an electric bicycle according to another embodiment of the present invention.

The invention relates to an electric bicycle, wherein the rigid strength of the frame is not under the structure of increasing weight, so that the battery has a better setting position, which not only facilitates loading and unloading the battery, but also improves the overall center of gravity stability of the bicycle. Hereinafter, details of the electric bicycle of the embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1A to 1C, in an embodiment, the electric bicycle 1 of the present invention includes a frame 10 and a battery 20. The frame 10 includes a lower tube 110 and a seat tube 120. The lower tube 110 and the seat tube 120 are disposed in front and rear to define a frame space 101 between the lower tube 110 and the seat tube 120, and the lower tube 110 extends obliquely downward and has a through hole 112 extending through the lower tube 110. The battery 20 can be selectively disposed in the frame space 101 corresponding to the through hole 112. When the battery 20 is loaded and unloaded, the battery 20 enters or leaves the frame space 101 through the through holes 112.

Specifically, the lower tube 110 and the seat tube 120 are preferably tubes that extend from top to bottom. And the down tube 110 is disposed close to the front wheel 30b, and the seat tube 120 is disposed close to the rear wheel 30a. The seat tube 120 has a lower end 122, and the lower tube 110 extends obliquely toward the lower end 122 of the seat tube 120 such that the lower tube 110 and the seat tube 120 have a frame space 101 that tapers from top to bottom. Optionally, the frame 10 further includes an upper tube 130, wherein the upper tube 130 is a tube body extending forward and backward, and an upper end of the lower tube 110 is connected to a front end of the upper tube 130, and an upper end of the seat tube 120 is connected to the upper tube 130. The rear end makes the frame space 101 a space defined between the lower tube 110, the seat tube 120, and the upper tube 130.

For example, the lower tube 110 has a lower tube rear surface 110a and a lower tube front surface 110b, wherein the lower tube rear surface 110a is a rearward facing column surface with respect to the long axis of the lower tube 110, and the lower tube front surface 110b is opposite The long axis of the lower tube 110 faces the front surface of the column. That is, the lower tube rear surface 110a faces the rear wheel 30a, and the lower tube front surface 110b faces the front wheel 30b. Therefore, the frame space 101 is defined between the seat tube 120 and the lower tube surface 110a of the lower tube 110; and in this embodiment, the frame space 101 is defined on the front surface of the seat tube 120, the lower tube rear surface 110a and Between the lower surfaces of the upper tube 130. The through hole 112 penetrates the lower tube 110 forward and backward to form a passage for the battery 20 to pass through the lower tube 110 when the battery 20 is attached or detached. For example, the position of the through hole 112 corresponding to the battery 20 is preferably opened at the lower end of the lower tube 110, and penetrates from the lower tube rear surface 110a to the lower tube front surface 110b, so that the through hole 112 has a rear opening at the lower tube rear surface 110a. 112a, and the through hole 112 has a front opening 112b at the lower tube front surface 110b. The size of the through hole 112 is preferably slightly larger than the cross section of the battery 20 perpendicular to the long axis direction, so that the battery 20 can move back and forth in the through hole 112 along the long axis direction, and when the battery 20 stays in the through hole 112, it can still face Rotate in the long axis side direction (up, down, left, and right). By increasing the size of the through hole 112, the freedom of movement of the battery 20 into and out of the frame space 101 can be increased. Further, as shown in FIG. 1C, the through-shafts of the front opening 112b and the rear opening 112a define a storage trajectory S1, and the storage trajectory S1 extends through the frame space 101. When the battery 20 is to be installed or removed, the battery 20 can enter or leave the frame along the storage trajectory S1. Space 101 (detailed later).

In this embodiment, the frame 10 further includes an auxiliary lower tube 140. The auxiliary lower tube 140 is connected between the lower tube 110 and the seat tube 120, and the lower tube 110 extends obliquely upward with respect to the auxiliary lower tube 140. For example, the auxiliary lower tube 140 can be regarded as an extended tube body of the lower tube 110, and with respect to the upper and lower extension of the lower tube 110, the auxiliary lower tube 140 can be extended forward and backward to be connected to the lower end of the lower tube 110 and the seat tube 120. When the battery 20 is disposed in the frame space 101, the auxiliary down tube 140 can be used to support the battery 20. In one embodiment, the auxiliary lower tube 140 is preferably integrated with the lower tube 110 into a single tube such that the auxiliary lower tube 140 is a portion that extends from the lower end of the lower tube 110 toward the seat tube 120. In another embodiment, the auxiliary lower tube 140 can be coupled to the lower tube 110 and the seat tube 120 by any suitable means of engagement (eg, welding, locking, etc.).

In one embodiment, the auxiliary lower tube 140 preferably has a receiving groove 142, and the receiving groove 142 is for receiving the battery 20. Specifically, the accommodating groove 142 is disposed along the long axis of the auxiliary lower tube 140 and communicates with the through hole 112 of the lower tube 110, so that the battery 20 can enter and exit through the through hole 112 of the lower tube 110 and be disposed in the accommodating groove 142. in. In this embodiment, the accommodating groove 142 is formed on the upper surface of the auxiliary lower tube 140 such that the accommodating groove 142 has an upwardly open notch, and the front end of the accommodating groove 142 communicates with the through hole 112 of the lower tube 110. Therefore, when the battery 20 is disposed in the frame space 101, the battery 20 is partially received in the accommodating groove 142 and supported by the auxiliary down tube 140, and the upper half of the battery 20 is exposed in the frame space 101. But not limited to this. In other embodiments, the auxiliary lower tube 140 can have a hollow tube body corresponding to the fully storable battery 20, so that the hollow body of the tube body can serve as the accommodating groove 142 for completely accommodating the battery 20. In addition, the shape of the accommodating groove 142 can correspond to the outer shape of the battery 20, so that when the battery 20 is disposed in the accommodating groove 142, the battery 20 can be fixed by the outer contour of the battery 20 and the accommodating groove 142, thereby reducing the movement of the battery 20. possibility. In an embodiment, the auxiliary lower tube 140 may have a fixing portion 144 for positioning the battery 20 to the auxiliary lower tube 140 when the battery 20 is disposed in the frame space 101. For example, the fixing portion 144 may be a bump, a convex rail or the like disposed on the auxiliary lower tube 140, and the battery 20 may have a corresponding convex or convex groove or a sliding groove to reach the battery 20 and the auxiliary lower tube 140. Relative positioning. In another embodiment, the fixing portion 144 can be a recess or a chute or the like disposed on the auxiliary lower tube 140, and the battery 20 can have a bump or a convex rail corresponding to the recess or the sliding slot, and can also reach the battery 20 and the auxiliary. The relative positioning of the lower tube 140.

In another embodiment, as shown in FIG. 2, the electric bicycle 1 can further include a fixing member 40, wherein the fixing member 40 is disposed in the receiving groove 142 of the auxiliary lower tube 140 for reinforcing the positioning of the battery 20 and lifting the vehicle. The appearance of the frame 10 is aesthetic. For example, the fixing member 40 can be a frame corresponding to the receiving groove 142 and the opening 112a of the through hole 112. When the battery 20 is disposed in the frame space 101, the fixing member 40 is located between the battery 20 and the auxiliary lower tube 140. In order to strengthen the positioning of the battery 20 and modify the shape of the auxiliary lower tube 140, the battery 20 and the auxiliary lower tube 140 have a uniform appearance. Furthermore, the fixing member 40 can also have a positioning portion 42 similar to the fixing portion 144 for positioning the battery 20.

As shown in FIG. 1A to FIG. 1C, the frame 10 further includes a front fork tube 150, wherein the upper end of the front fork tube 150 is connected to the upper end of the lower tube 110, and the lower end of the front fork tube 150 is substantially connected by two fork tubes 152. U-shaped structure. When the battery 20 is loaded and unloaded, the battery 20 passes between the two fork tubes 152 to enter or exit the frame space 101. In other words, in this embodiment, the accommodating trajectory S1 can extend between the two fork tubes 152 such that the accommodating trajectory S1 is a linear trajectory that passes through the front fork tube 150 and extends through the through hole 112 to the frame space 101, that is, the accommodating trajectory S1 is substantially parallel to the long axis of the auxiliary down tube 140. Thereby, when the battery 20 is to be removed from the frame space 101, the battery 20 can pass through the through hole 112 of the lower tube 110 and then through the two fork tubes 152 of the front fork tube 150, and the battery is taken out from the front of the front fork tube 150. 20. In other words, when the battery 20 moves in the direction away from the seat tube 120 along the accommodation track S1, the battery 20 can enter the lower tube 110 from the rear opening 112a of the through hole 112, and the lower tube 112b out of the lower tube from the front opening 112b of the through hole 112. 110, the battery 20 can be detached from the frame space 101 and enter between the two fork tubes 152 of the front fork tube 150, and the battery 20 can be taken out from the front of the front fork tube 150. Similarly, when the battery 20 is to be placed in the frame space 101, the battery 20 can pass between the two fork tubes 152 of the front fork tube 150 and pass through the through holes 112 of the lower tube 110 to move toward the frame space 101. In other words, when the battery 20 moves along the accommodating trajectory S1 toward the seat tube 120, the battery 20 can pass between the two fork tubes 152 of the front fork tube 150 and enter the lower tube 110 from the front opening 112b of the through hole 112. The rear opening 112a of the through hole 112 passes through the lower tube 110, so that the battery 20 enters the frame space 101 to be disposed in the receiving groove 142 of the auxiliary lower tube 140, but is not limited thereto.

3A to 3C are schematic views of another embodiment of the battery pack 20. As shown in FIG. 3A, when the battery 20 leaves the frame space 101, the battery 20 can move forward through the through hole 112 of the lower tube 110, similar to the above-described storage path S1, into the space between the two fork tubes 152 of the front fork tube 150. As shown in FIG. 3B, when the battery 20 enters between the two fork tubes 152 of the front fork tube 150, the rider can rotate the handlebar such that the front fork tube 150 is deflected relative to the lower tube 110 so as to be between the two fork tubes 152. The through shafts of the through shaft and the through hole 112 are changed from parallel to staggered. That is, the long axis of the battery 20 is not parallel to the through-axis of the through hole 112. Thereby, as shown in FIG. 3C, the battery 20 can be grasped from the rear to disengage the battery 20 from the frame 10. In this way, the rider can take out the battery 20 while sitting on the electric bicycle 1, and the battery 20 can be taken out in front of the electric bicycle 1 without going to the station.

4A through 4C are schematic views of another embodiment of the battery pack 20. In this embodiment, the storage track S2 may be a V-shaped track, and includes a first storage track segment S21 and a second storage track segment S22, wherein the first storage track segment S21 is substantially parallel to the long axis of the auxiliary down tube 140 and runs through The hole 112, and the second receiving track segment S22 is preferably at an angle to the auxiliary lower tube 140. In one embodiment, the angle is preferably an acute angle. As shown in FIG. 4A, when the battery 20 is taken out, the battery 20 is along the first storage rail. The track S21 moves away from the seat tube 120 to enter the lower tube 110 from the rear opening 112a of the through hole 112, and protrudes from the front opening 112b of the through hole 112. The middle portion of the battery 20 is received in the through hole 112. in. As shown in FIG. 4B, when the middle portion of the battery 20 is received in the through hole 112, the battery 20 is rotated upward in the through hole 112 to the right side, so that the battery 20 is inclined with respect to the auxiliary lower tube 140, and the long axis and the auxiliary of the battery 20 are assisted. An angle θ is sandwiched between the long axes of the tubes 140 to define a second receiving track segment S22. The angle θ is preferably an acute angle. Furthermore, as shown in FIG. 4C, the battery 20 can be moved rearward in the direction of the seat tube 120 along the second storage path segment S22, and the rear opening 112a of the through hole 112 is separated from the lower tube 110, thereby being separated from the frame space 101. Similarly, when the battery 20 is installed, the battery 20 can move in the direction of the lower tube 110 along the second storage track segment S22 with the auxiliary lower tube 140 at an angle θ to enter the lower tube from the rear opening 112a of the through hole 112. 110, and the lower opening 110b of the through hole 112 protrudes from the lower tube 110, so that the middle portion of the battery 20 is first received in the through hole 112. Then, the battery 20 is rotated in the lower left direction in the through hole 112, so that the long axis of the battery 20 becomes substantially parallel to the long axis of the auxiliary down tube 140, so that the battery 20 can be moved backward in the direction of the seat tube 120 along the first receiving track segment S21. It is disposed in the frame space 101 and disposed in the receiving groove 142.

Furthermore, as shown in FIGS. 1B and 1C, the electric bicycle 1 further includes a battery contact portion 50, wherein the battery contact portion 50 is disposed in the seat tube 120. When the battery 20 is disposed in the frame space 101, the battery 20 is connected to the battery. The point 50 is electrically connected. For example, the seat tube 120 preferably has an opening 124. The battery contact portion 50 is disposed in the seat tube 120, and the battery 20 extends into the opening 124 to be electrically connected to the battery contact portion 50. In one embodiment, the opening 124 is preferably formed on the surface of the seat tube 120 near the lower end 122 and facing forward, such that the opening 124 communicates with the receiving groove 142. The battery contact portion 50 is disposed in the seat tube 120 corresponding to the opening 124. When the battery 20 enters the frame space 101 along the storage trajectories S1 and S2 and is received in the accommodating groove 142, the end of the battery 20 can enter the opening 124 and be connected to the battery. The point 50 is electrically connected. In other words, the end of the battery 20 can be provided with electrical contacts 22 (shown in Figures 3A to 3C) and connected to the battery by electrical contacts 22. The point 50 is electrically connected.

As shown in FIGS. 1A to 1C, the electric bicycle 1 further includes a driver 60 in which the driver 60 is disposed under the battery 20, and the battery 20 is electrically connected to the driver 60 through the battery contact portion 50, thereby providing power required by the driver 60. For example, the driver 60 can be implemented as an electric motor. In this embodiment, the driver 60 is disposed under the auxiliary lower tube of the 140 and electrically connects the battery contact portion 50 to electrically connect the battery 20. It should be noted here that when the battery 20 is disposed in the frame space 101, the battery 20 is placed across the lower end of the lower tube 110 and the seat tube 120, whereby the battery 20 can be disposed at the center of the frame 10 and close to the electric bicycle. The driver 60 not only maintains the center of mass of the electric bicycle in the center, but also simplifies the circuit design of the circuit.

In one embodiment, as shown in FIG. 1A, when the battery 20 is disposed in the frame space 101, the front end portion of the battery 20 is housed in the lower tube 110 and substantially does not protrude forward from the through hole 112. Specifically, when the battery 20 is disposed in the receiving groove 142 of the auxiliary lower tube 140, the rear end of the battery 20 extends into the opening 124 of the seat tube 120 and is electrically connected to the battery contact portion 50 by the electrical contact 22, and The front end of the battery 20 protrudes into the lower tube 110 from the rear opening 112a of the through hole 112, and does not substantially protrude from the front opening 112b of the through hole 112. For example, the front end of the battery 20 may have an inclined surface 24 to correspond to the downwardly extending lower tube front surface 110b such that when the battery 20 is disposed in the frame space 101, the inclined surface 24 of the front end of the battery 20 does not substantially protrude from the lower tube. Front surface 110b.

Furthermore, as shown in FIG. 5A and FIG. 5B, the electric bicycle further includes a stopper 70, wherein the stopper 70 is disposed on the lower tube 110 corresponding to the through hole 112 to selectively block the battery 20 from coming out of the through hole 112. For example, the stop member 70 can be implemented as a baffle, wherein the stop member 70 is rotatably coupled to the lower tube 110 to selectively substantially obscure the through hole 112 (as shown in FIG. 5A) or the open through hole 112 (eg, Figure 5B). Specifically, the stopper 70 is rotatable relative to the lower front surface 110b of the lower tube 110 to Selectively at least partially shielding the through hole 112 from the front opening 110b of the lower front surface 110b of the lower tube 110 to block the above-mentioned storage trajectories S1, S2, so that the battery 20 cannot be detached from the lower front surface 110b of the lower tube 110. Furthermore, the locking member 80 can be disposed on the stopper 70 or the lower tube 110 to selectively maintain the stopper 70 in the state of shielding the through hole 112. For example, in this embodiment, the lock 80 can be implemented as a lock disposed on the stopper 70. When the stopper 70 obscures the through hole 112, the lock 80 can interfere with the lower tube 110 at the periphery of the through hole 112. The stopper 70 is prevented from rotating relative to the lower tube 110. When the key 80 is used to open the lock 80, the interference between the lock 80 and the lower tube 110 can be released, thereby allowing the stopper 70 to rotate relative to the lower tube 110, and the through hole 112 is opened to allow the battery 20 to enter and exit through the through hole 112. Frame space 101. In other embodiments, the locking member 80 can be disposed on the lower tube 110 corresponding to the blocking member 70, so that the locking member 80 selectively interferes with the blocking member 70, and restricts the rotation of the blocking member 70 relative to the lower tube 110. This will not be repeated here.

It should be noted that when the blocking member 70 obscures the through hole 112, the surface of the blocking member 70 preferably has an integrated appearance with the lower tube front surface 110b to enhance the appearance of the electric bicycle, but not limited thereto. In other embodiments, the stop member 70 can be a trim panel to increase the flexibility of the design. In addition, the stopper 70 and the lower tube 110 can be engaged by a snap mechanism (for example, a hook, a snap hole) to be held in the state of shielding the through hole 112, and is not limited to the use of the lock type lock 80.

As shown in FIG. 6, the electric bicycle further includes an inner surface elastic body 90, wherein the inner surface elastic body 90 is disposed in the through hole 112. When the battery 20 is disposed in the frame space 101, the front end of the battery 20 stays in the 112 through hole, and the inner surface elastic body 90 surrounds the front end of the battery 20 to assist in fixing the battery 20. When the battery 20 is to be installed or removed, the inner surface elastic body 90 is deformed to allow the battery 20 to be rotated in the lateral direction in the through hole 112. Specifically, the inner surface elastic body 90 can be implemented as a rubber sleeve or an elastic gasket, and can be sleeved on the front opening 112b of the through hole 112 or can extend from the front opening 112b of the through hole 112 to the rear opening. 112a, may be sleeved in the rear opening 112a of the through hole 112, or may be sleeved in the front opening 112b and the rear opening 112a of the through hole 112, respectively. When the battery 20 is disposed in the frame space 101, the front end of the battery 20 stays in the through hole 112 and extends into the rubber sleeve or the elastic gasket type inner surface elastic body 90 to be elasticized by the inner surface elastic body 90. The inner surface of the inner surface elastic body 90 abuts against the battery 20 to achieve a positioning function. When the battery 20 is to be attached or removed, the battery 20 is pressed against the inner surface of the inner surface elastic body 90 to deform the inner surface elastic body 90, and the battery 20 can be rotated in the lateral direction in the through hole 112 in the vertical direction.

It should be noted that the battery 20 is supported by the auxiliary down tube 140 in the above embodiment, but is not limited thereto. In another embodiment, the frame may not include the auxiliary lower tube 140 described above. As shown in Fig. 7, the frame 10' includes a lower tube 110' and a seat tube 120 disposed front and rear. The lower tube 110' extends downwardly to connect to the lower end 122 of the seat tube 120, and defines a frame space 101 between the lower tube 110' and the seat tube 120, thereby allowing the battery 20 to straddle the lower tube 110' and the seat tube At the lower end of 120. The driver 60 is disposed at the lower end of the seat tube 120 and under the battery 20 to at least partially support the battery 20. In this embodiment, the lower tube 110' also has a through hole 112 extending through the lower tube 110' from the lower tube rear surface 110a to the lower tube front surface 110b. When the battery 20 is loaded or unloaded, the battery 20 can also enter or leave the frame space 101 through the through hole 112, and details are not described herein again.

Compared with the prior art, the present invention places the battery across the lower ends of the seat tube and the lower tube, so that the battery is placed close to each other, and the electric bicycle driver can maintain the center of mass of the electric bicycle in the center, and can effectively simplify the circuit. Line design. Furthermore, the present invention only needs to open a through hole corresponding to the cross-sectional size of the battery transversely to the long axis in the lower tube, which significantly reduces the slot required for the battery of the frame, thereby effectively maintaining the structural strength of the frame and improving the battery. The freedom and flexibility of loading and unloading on the frame.

The present invention has been described by the above embodiments, but the above embodiments are for illustrative purposes only and are not intended to be limiting. Those skilled in the art know that they are not deviated from the spirit of the present invention. The embodiments of the invention may have other modifications of the illustrative embodiments. Accordingly, the scope of the invention is intended to cover such modifications and are only limited by the scope of the appended claims.

Claims (21)

An electric bicycle comprises: a frame comprising a lower tube, a tube and a front fork tube, wherein the lower tube and the seat tube are arranged front and rear to define a frame space between the lower tube and the seat tube, The upper end of the front fork pipe is connected to the upper end of the lower pipe, the lower end of the front fork pipe is substantially connected by two fork pipes, and the lower pipe extends obliquely downward and has a through hole penetrating the lower pipe; and a battery The through hole is selectively disposed in the frame space, wherein when the battery is loaded or unloaded, the battery enters or leaves the frame space from below the connection between the lower pipe and the front fork pipe through the through hole . An electric bicycle comprising: a tube having a lower end; a lower tube extending obliquely toward a lower end of the seat tube, the lower tube having a through hole, a rear surface of the lower tube and a front surface of the lower tube, a frame space is defined between the rear surface of the lower tube and the seat tube, the through hole penetrating the lower tube, the through hole having a rear opening at the rear surface of the lower tube, the through hole having a front surface at the lower tube a front opening, the front opening and the through opening of the rear opening define a receiving trajectory extending through the frame space; a front fork tube, the upper end of the front fork tube is connected to the upper end of the lower tube, and the front The lower end of the fork tube is substantially connected by two fork tubes; and a battery is selectively disposed in the frame space corresponding to the through hole; wherein when the battery is loaded or unloaded, the battery is along the storage path from the lower tube And the space below the junction of the front fork tube enters or leaves the frame space. The electric bicycle according to claim 1 or 2, further comprising an auxiliary lower pipe, the auxiliary lower pipe connection Between the lower tube and the seat tube, and the lower tube extends obliquely upward relative to the auxiliary lower tube, the auxiliary lower tube is used to support the battery when the battery is disposed in the frame space. The electric bicycle according to claim 3, wherein the auxiliary lower tube has a receiving groove for receiving the battery. The electric bicycle according to claim 3, wherein the auxiliary lower tube has a fixing portion for positioning the battery when the battery is disposed in the frame space. The electric bicycle according to claim 1 or 2, further comprising a battery contact portion, wherein the battery contact portion is disposed on the seat tube, and the battery and the battery contact portion are provided when the battery is disposed in the frame space Electrical connection. The electric bicycle according to claim 6, wherein the seat tube has an opening, the battery contact portion is disposed in the seat tube, and the battery extends into the opening to be electrically connected to the battery contact portion. The electric bicycle according to claim 1 or 2, further comprising a stopper, wherein the stopper is disposed in the lower tube corresponding to the through hole to selectively block the battery from coming out of the through hole. The electric bicycle according to claim 8, wherein the stopper comprises a baffle that selectively shields the through hole. The electric bicycle according to claim 1, wherein the two fork tubes are connected to form a U-shaped structure, and when the battery is loaded or unloaded, the battery passes between the two fork tubes to enter or leave the frame space. The electric bicycle according to claim 2, wherein the two fork tubes are connected to form a U-shaped structure, and the receiving track extends between the two fork tubes. The electric bicycle according to claim 6, further comprising a driver, wherein the driver is disposed under the battery to support the battery, and the battery is electrically connected to the driver through the battery contact portion. The electric bicycle according to claim 3, further comprising a driver, wherein the driver is disposed on The auxiliary lower tube is connected below to electrically connect the battery. The electric bicycle according to claim 1, wherein when the battery is disposed in the frame space, the battery is straddle the lower tube and the seat tube, and the front end portion of the battery is accommodated in the lower tube and substantially Not protruding from the through hole. The electric bicycle according to claim 2, wherein when the battery is disposed in the frame space, the front end of the battery enters the rear opening and substantially does not protrude from the front opening. The electric bicycle according to claim 2, further comprising an auxiliary lower tube connected to the lower tube and extending toward a lower end of the seat tube, the lower tube extending obliquely upward relative to the auxiliary lower tube, and the lower tube The auxiliary down tube has a long axis that is substantially parallel to the long axis. The electric bicycle according to claim 16, wherein the storage trajectory is a linear trajectory, and when the battery moves along the accommodating trajectory toward the seat tube, the battery can enter from the front opening and protrude from the rear opening Providing the battery in the frame space; when the battery moves along the accommodating track away from the seat tube, the battery can enter from the rear opening, and the battery is detachable from the front opening The frame space. The electric bicycle according to claim 2, wherein the storage track is a V-shaped track, and when the battery is installed, the battery enters from the rear opening, protrudes from the front opening, and is downward in the through hole Rotating and moving backward to be disposed in the frame space; when the battery is taken out, the battery can enter from the rear opening, protrude from the front opening, and rotate upward in the through hole and move backward to disengage the Frame space. The electric bicycle according to claim 18, further comprising an inner surface elastic body, wherein the inner surface elastic body is disposed in the through hole, and the front end of the battery stays in the through hole when the battery is disposed in the frame space The inner surface of the elastomer surrounds the front end of the battery to assist in securing the battery; when intended to be installed or Upon removal of the battery, the inner face elastomer is deformed to allow the battery to rotate up or down in the through hole. The electric bicycle according to claim 1 or 2, further comprising an auxiliary lower tube connected to the lower tube and extending toward a lower end of the seat tube, the lower tube extending obliquely upward with respect to the auxiliary lower tube, The lower tube and the auxiliary lower tube exhibit an L-shaped structure, and the through hole is located at a turning point of the L-shaped structure. An electric bicycle comprising: a tube having a lower end; a lower tube extending obliquely toward a lower end of the seat tube, the lower tube having a front surface of the lower tube and a front opening, the lower tube and the seat tube Defining a frame space between the two; an auxiliary lower tube connected between the lower end of the lower tube and the lower end of the seat tube, the lower tube extending obliquely upward relative to the auxiliary lower tube, the lower tube and the lower tube The auxiliary lower tube presents an L-shaped structure, the front opening is located at a turning point of the L-shaped structure, the front opening and the through-axis of the frame space define a receiving track, and the auxiliary lower tube has a long axis, and the receiving The track is at least partially substantially parallel to the long axis; a front fork tube, the upper end of the front fork tube is connected to the upper end of the lower tube, and the lower end of the front fork tube is substantially connected by two fork tubes; and a battery can be The front opening should be selectively disposed in the frame space; wherein when the battery is loaded or unloaded, the battery enters or leaves the frame space from below the junction of the lower tube and the front fork tube along the receiving path.