TWI396647B - Foldable electric bicycle - Google Patents

Description

Electric folding bicycle

The invention relates to an electric folding bicycle, in particular to a multi-segment folding frame, which can greatly reduce the volume after folding, thereby achieving the purpose of carrying.

With the convenience of science and technology, the human life is better, but the pollution caused by human beings is getting more and more obvious. The exhaust emissions of steam locomotives are increasing, which is a big load for the earth and the human body. Recently, one after another. Movies that sparked environmental issues made people shudder. Human beings should pay attention to the health of the earth. From the emission reduction of steam locomotives, if everyone can replace the use of steam locomotives with the mass transit system and then by transshipment, it is bound to greatly reduce the use of steam locomotives. Pollution. Gaseous pollutants are mainly derived from gases produced by burning fossil fuels, including:

1. Sulfur Dioxide - Long-term inhalation of sulfur dioxide can affect the normal function of mucous membranes or cells. It is often associated with suspended particles, which can increase the number of patients with bronchitis, asthma, emphysema and worsening the condition.

2. Nitric oxide - easily combined with hemoglobin, affecting the normal function of oxygen transport; when the concentration of inhalation is too high, it will cause hypoxia in the body, causing damage to the central nervous system.

3. Nitrogen dioxide - irritating, can irritate the eyes, nose and lungs, causing symptoms such as trachea and inflammation pneumonia. It even reduces the resistance of the respiratory organs, making them susceptible to infection.

4. Carbon monoxide-the binding force to heme is about 200 times that of oxygen. Therefore, when it enters the human body, it immediately combines with hemoglobin to hinder the delivery of oxygen, causing humans to have symptoms of hypoxia and snoring. death.

Improving the air quality of steam locomotives and replacing the steam locomotives with mass transit vehicles and transport tools is the biggest goal of the invention.

According to the statistics of the number of vehicles registered in the five counties and cities in the south during the period of 87-96, the growth rate of the number of vehicles in each county is close to the average growth rate of 32.5%, the growth rate of vehicle registration in Kaohsiung County is up to 34.7%, and the highest in Kaohsiung City is 31.3%. Kaohsiung City The population and vehicle density are much higher than those in the southern five counties. Based on the number of registered vehicles in Kaohsiung City in 1996, the total number of vehicles in 1996 was 1,601,634, and the average number of vehicles per person was 1.05 per person. The number of locomotives was 1,172,685, accounting for 73.2% of the total number of vehicles. The locomotives and passenger cars showed a significant growth trend from 83 to 96 years. The growth rate was about 87.9% and 45.3%, and the total number of vehicles increased by 73.3%. In terms of growth rate, the number of vehicles is about 9.94 times the population.

According to the known electric bicycle, it is quite popular on the general road. Since most of the above electric bicycles cannot be folded to effectively reduce the volume, most of them cannot carry the mass transit system, and can only be used for the mother-in-law to buy food. Tools only. In order to improve the aforementioned drawbacks, a folding electric bicycle such as the national novel No. M297337 "Folding bicycle" has been proposed, which includes a frame, a rear wheel base, a front wheel base and an electric transmission device. Connected to the second end of the frame for pivoting a rear wheel, the front wheel base is connected to the first end of the frame for pivoting the front fork, and the front fork is for pivoting the front wheel, the electric transmission device comprises a motor, a transmission mechanism for driving the front wheel or the rear wheel, the main feature of which is that the frame includes a main frame and a sub-frame that are pivotally connected to each other, and a first fixing device is disposed at a pivotal connection between the main frame and the sub-frame. The main frame and the sub-frame are relatively folded or unfolded and fixed by a first fixing device, the front wheel base is connected to the sub-frame, the rear wheel base is pivotally connected to the main frame, and the main frame and the rear are A second fixing device is disposed at the pivotal connection of the wheel base such that the main frame and the rear wheel base can be folded relative to each other, or unfolded and fixed by the second fixing device.

Although the conventional structure has a two-stage folding and volume reduction effect, the two-stage folding structure adopts a horizontal folding manner, so when the positioning structure is not surely locked, the body is likely to be severely oscillated, so that it is harmful. The safety of the rider is generated. In addition, the fork structure and the rear fork pipe system of the conventional structure are double-armed, so that the overall structure is complicated, and thus the volume of the folding is affected, so there is a need for further improvement.

There is also a patent case for the new type 415410 "Folding electric bicycle" and the new model No. 478821 "Bicycle with electric motor". Although these conventional structures have the function of folding and reducing the volume, they only have a single section. The folding function is not effective in greatly reducing the size of the bicycle, and the conventional structure has a double-arm type for the fork tube and the rear fork tube, so that the overall structure is complicated, thereby affecting the volume when folding and folding, so that there is further improvement. necessity.

In view of this, the inventors have actively studied and researched, and through continuous research and development and experiments, finally developed a practical invention.

The main object of the present invention is to provide an electric bicycle with a multi-stage folding function. Since the single-arm front and rear wheel folding link mechanism is more simplified, the utility model can achieve the purpose of being carried after folding, and thus has a simplified structure. After folding, the volume is small, the cost is low, the folding operation is easy, and the safety and convenience of riding are improved, so that the user can bring the electric bicycle to the mass transit vehicle, so that the electric bicycle can be used as a transport vehicle.

In order to achieve the above-mentioned effects, a front wheel and a rear wheel are pivotally mounted on the frame, and the front wheel or the rear wheel is driven by a motor-driven mechanism, wherein the second section of the front fork of the frame passes through the shaft Pivoting the front wheel, and arranging two handles at one end of the handle bar, and then providing a shaft seat at one end of the front arm, the shaft seat is provided for the first segment of the front fork bar and the end of the handle bar to be horizontally rotated The wheel base has two juxtaposed ring grooves, and the tops of the two ring grooves respectively extend upward and are connected to each other for a pad, and the rear wheel is pivotally connected to the second ring groove by an axle, and one end of the rear arm Then, the other end of the front arm is pivotally connected to the other end of the front arm, and the other end of the rear arm is rotatably disposed on the wheel base, and the first segment and the second segment of the front fork are disassembled or assembled by the first positioning means. And the second positioning means provides folding or unfolding positioning when the rear arm pivots relative to the wheel base, and the third positioning means provides folding or unfolding positioning when the front arm pivots relative to the rear arm. The folding frame can be used to make the ring groove on one side of the wheel seat close to the front wheel.

one. Basic embodiment of the invention

Referring to Figures 1 to 3, the electric bicycle with multi-stage folding function of the present invention can achieve the purpose of being carried after folding due to the simple structure of the single-arm front and rear wheel folding linkage mechanism. Therefore, the structure is simplified, the cost is low, the folding operation is easy, and the safety and convenience of riding are improved, so that the user can bring the electric bicycle to the mass transit vehicle, so that the electric bicycle can be used as a transport vehicle.

Referring to the first and second figures, in order to achieve the above effects, the basic technical feature of the present invention is that a front wheel (16) and a rear wheel (17) are rotatably pivoted on the front and rear ends of the frame (10), respectively. And driving the rear wheel (17) or the front wheel (16) by a motor-driven mechanism (20). As shown in the fifth figure, a hub (170) is disposed at a center position of the rear wheel (17), and the motor-driven mechanism (20) The specific embodiment may be a hub motor disposed in the hub (170) (the hub motor is a conventional technique, which is not explicitly shown in the drawings), and the hub motor has the axle (171) as the axis and the axle (171) The two ends are respectively fixed on the two side plates (143). Referring to the first and second figures, the frame (10) includes a front fork (11), a front arm (12), a handlebar (13), a wheel base (14), and a rear support. The arm (15), a first positioning means (30), a second positioning means (40) and a third positioning means (50) can be achieved by the function of the multi-stage folding frame (10) The purpose of carrying the trip.

Referring to the first and second figures, in the basic embodiment of the present invention, the front fork lever (11) includes a first segment portion (110) and a second segment portion (111) which are assembled to each other, and second. The bottom end of the segment portion (111) is pivotally connected to the front wheel (16), and two handles (130) are provided on the top end of the handle bar (13) for holding by the user, and then disposed at one end of the front arm (12). There is a shaft seat (120), and the shaft seat (120) is rotatably provided for the handle rod (13) to enable the handle rod (13) to interlock the front fork rod (11), thereby driving the front wheel (16) to turn. In order to achieve the above-described effects, in a more specific embodiment, a bearing assembly (such as a commonly known front bowl assembly) for pivoting the end of the handlebar (13) is disposed within the axle seat (120).

Referring to the first to fourth figures, the wheel base (14) of the present invention has two juxtaposed side plates (143), and each side plate (143) is provided with an outwardly convex ring wall (144) at the periphery thereof, so that the ring A ring groove (140) is formed in the inner wall of the wall (144), and the ring groove (140) is received by the front wheel (16), and each of the tops of the two ring walls (144) extends upwardly with a pillar (145), and the two pillars (145) 145) A pad (141) is connected, and the rear wheel (17) is connected to the two side plates (143) by an axle (171) (please refer to FIG. 5). A circumferential groove (142) of a ring wall (144) is provided with a long groove (142) through which the rear arm (15) passes, and the rear arm (15) is provided with an axle (171) of the rear wheel (17). The center of the circle swings in the long groove (142) to rotate relative to the wheel base (14). The two ends of the axle (171) of the rear wheel (17) are respectively connected to the second ring wall (144). One end of the rear arm (15) is pivotally connected to the other end of the front arm (12), and the other end is rotatably disposed on the wheel base (14) and coaxial with the rear wheel (17). The two sides of the shaft seat (120) of the front arm (12) are respectively provided with a stepping lever (121) which can be folded or unfolded for the rider's foot to step on.

Referring to the first to third figures, the first positioning means (30) of the present invention is for disassembling or assembling the first section (110) and the second section (111) of the front fork lever (11). The first section (110) and the second section (111) of the front fork lever (11) are separately stored or combined. The second positioning means (40) is mainly used to provide folding or unfolding positioning when the rear arm (15) pivots relative to the wheel base (14). In addition, the third positioning means (50) is used to provide folding or unfolding positioning when the front arm (12) pivots relative to the rear arm (15), so that the wheel can be folded by folding the frame (10) The ring groove (140) on one side of the seat (14) can be stored close to the front wheel (16).

two. Specific embodiment of the present invention 2.1 Implementation of the first positioning means

Please refer to the first and third figures for the purpose of disassembling or assembling the first section (110) and the second section (111) of the front fork lever (11) so that the front fork lever (11) is first The segment portion (110) and the second segment portion (111) are separately received or combinedly positioned. In one embodiment, the present invention is disposed at the end of the first segment (110) of the front fork bar (11). There is a slot (112), and a through hole (113) is disposed at a top end of the second section (111), and the first positioning means (30) includes a first section (110) and a second section (111) a cable (114), and a quick release assembly (60), the quick release assembly (60) includes a trigger (61) having an eccentric clamp (610), a shaft (62) and a perforation (113) a resisting block (63) on one side, one end of the shaft (62) is pivoted on the eccentric pressing block (610), and the other end is connected through a through hole (113) and connected with a pressing block (64), first The diameter of the end of the section (110) is smaller than that of the second section (111), so the slot (112) of the first section (110) can penetrate into the second section (111) and be pressed against the shaft. On the rod (62), the lever (61) can be used to drive the long side of the eccentric pressure block (610) against the abutting block (63) and force the shaft (6). 2) moving in the direction of the lever (61), so that the pressing block (64) is forced to the first section (110) and the second section (111) to form a combined positioning, since the illustration does not fully disclose the quick release Each part of the component (60), so it can refer to the parts of the parts which are part of the quick release assembly (60).

2.2 Implementation of the second positioning method

Referring to the first, second and seventh figures, in order to provide folding or unfolding positioning of the rear arm (15) relative to the wheel base (14), the present invention is in a specific embodiment A slot (150) is defined in a side of the rear arm (15), and the second positioning means (40) is disposed on the wheel base (14) to be respectively disposed at two positions with respect to the rear arm (15). 41), each body (41) seat body is provided with a through hole (420) corresponding to the slot (150), and the end of the hole (420) is provided with an inner convex ring edge (423), and the center of the ring edge (423) Forming a small hole (424), the through hole (420) accommodating a card tip (42), the middle portion of the card tip (42) traversing the small hole (424), and the end of the card tip (42) has an outer diameter enlarged The handle (422) and the other end have an outer diameter enlarged clamping section (421), and a spring (43) is disposed between the clamping section (421) and the ring edge (423), when the clamping section (421) When the spring (43) is compressed by force, the clamping section (421) can be retracted into the perforation (420), and when the clamping section (421) is engaged with the slot (150), the clamping section (421) is subjected to the spring. (43) The elastic force penetrates into the slot (150) to fix the rear arm (15) to the wheel base (14).

Please refer to the second and seventh figures. The card section (421) has a slope (421a). When the rear arm approaches the base, the card section (421) can be pushed along the slope (421a). The clamping section (421) compresses the spring (43) and retracts into the perforation (420). When the clamping section (421) is aligned with the slot (150), the clamping section (421) is pushed by the spring (43) to be inserted into the slot (150). As shown in the seventh figure, the right seat (41) is for the rear arm (15) to be pivotally folded and positioned relative to the wheel base (14), and the left seat (41) is provided for the rear arm (15). ) relative to the wheel base (14) for pivoting and positioning.

2.3 Implementation of the third positioning means

Referring to the first, second and sixth figures, in order to achieve folding or unfolding positioning when the front arm (12) is pivoted relative to the rear arm (15), the present invention is in a specific embodiment. The front arm (12) and the rear arm (15) each have a corresponding pivot hole (123) (151), and are respectively disposed on a side where the front arm (12) and the rear arm (15) meet There is an intermeshing serrated structure (122) (152), and the third positioning means (50) is a quick release assembly (60). The quick release assembly (60) includes a wrench having an eccentric clamp (610). a rod (61), a shaft rod (62) and a resisting block (63) disposed on one side of the pivot hole (123) (151), the shaft rod (62) is pivoted at one end to the eccentric pressure block (610) The other end is connected to the pressing block (64) through the pivot hole (123) (151), and when the trigger rod (61) drives the long side of the eccentric pressing block (610) to be pressed against the resisting block (63), The shaft (62) can be forced to move in the direction of the lever (61), so that the pressing block (64) is forced to form the sawtooth structure (122) (152) of the front arm (12) and the rear arm (15). Positioning.

2.4 Implementation of the folding of the handlebar

Referring to the first to third figures, in order to make the handle bar (13) have a folding and unfolding position for reducing the volume of the frame (10), in one embodiment, the handle bar (13) comprises a mutual group. a first segment (131) and a second segment (132), wherein the first segment (131) and the second segment (132) each have a correspondingly connected pivot hole (133), and The pivot hole (133) is provided with a quick release assembly (60) for providing folding or unfolding positioning when the first segment portion (131) pivots relative to the second segment portion (132), since the third figure is not completely The parts of the quick release assembly (60) are exposed, so that the parts of the parts of the quick release assembly (60) can be referred to. And the quick release assembly (60) comprises a trigger (61) having an eccentric clamp (610), a shaft (62) and a resisting block (63) disposed on one side of the pivot hole (133), the shaft (62) one end of the shaft is pivoted on the eccentric pressure block (610), and the other end is passed through the pivot hole (133) and is provided with a pressing block (64). When the lever (61) drives the eccentric pressure block (610) The long side is pressed against the abutting block (63), which forces the shaft (62) to move toward the trigger (61), thereby forcing the pressing block (64) to tighten the first section (131) and the second section. The portion (132) forms a position.

Participation. The present invention is specifically implemented

Please refer to the first to third and seventh figures. Since the motor-driven mechanism (20) can drive the rear wheel (17) to rotate, the user only needs to activate the electric throttle located at the handle (130) to allow the motor-driven mechanism. (20) The operation drives the rear wheel (17) forward. When the user wants to fold the frame (10) when he arrives at the destination (such as a home, company, factory, transfer station or mass transit station, etc.), the positioning state of the second positioning means (40) is first released. Pull the handle (422) on the seat (41) below the wheel base (14) to pull the card (42) to compress the spring (43) and move it toward the trigger (61). The locking section (421) of the tip (42) is disengaged from the slot (150) to form a released state, and then the rear arm (15) is pivoted clockwise to the position of the seat (41) above the wheel base (14). At this time, the slot (150) of the rear arm (15) can be slid into the cardet (421a) of the clamping section (421), so that the rear arm (15) and the front arm (12) can be reached. In the direction of the wheel seat (14), the purpose of folding and closing.

Please refer to the first and third figures. On the other hand, the trigger lever (61) of the first positioning means (30) is urging upward, so that the trigger (61) drives the eccentric clamp (610) to be short. Pressed on the abutting block (63), the shaft (62) moves in the direction of the pressing block (64) due to the release between the pressing block (64) and the second segment (111), thus The second section (111) can be separated from the first section (110). Further, since the first section (110) and the second section (111) are connected to the cable, the connection is The second section (111) of the front wheel (16) is not too far away from the frame (10), and finally the front wheel (16) is placed in the ring groove (140) received on one side of the wheel base (14) due to The front wheel (16) and the ring groove (140) are matched to each other, and the front wheel (16) has an appropriate elastic force, so that the front wheel (16) can be effectively positioned and received in the ring groove (140). Referring again to the third figure, finally, the quick release assembly (60) of the handlebar (13) is cocked upward to make the first section (131) and the second section of the handlebar (13) (132). Forming a free pivoting release state, the first section (131) is folded relative to the second section (132), and the puller (61) of the quick release assembly (60) is snapped down so that The first section (131) and the second section (132) are in a folded and positioned state, so that the user can hold the handle (130) by hand and carry it in the ground by the rear wheel (17).

Hey. in conclusion

Therefore, according to the above technical features, the present invention does have a multi-stage folding function electric bicycle, and the single-arm front and rear wheel folding link mechanism is more simplified, so that the folding can be carried out. Therefore, it has the characteristics of simplified structure, small volume after folding, low cost, easy folding operation, and improved safety and convenience of riding, so that the user can bring the electric bicycle to the mass transit vehicle, so that the electric bicycle can be used as a transporter. Transportation.

The above is only one of the possible embodiments of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims are It should be included in the scope of the patent of the present invention. The invention is specifically defined in the structural features of the request item, is not found in the same kind of articles, and has practicality and progress, has met the requirements of the invention patent, and has filed an application according to law, and invites the bureau to approve the patent according to law to maintain the present invention. The legal rights of the applicant.

(10). . . Frame

(11). . . Front fork

(110) (131). . . First section

(111) (132). . . Second paragraph

(112). . . Slotting

(113). . . perforation

(114). . . Steel cable

(12). . . Front arm

(120). . . Shaft seat

(121). . . Stepping rod

(122) (152). . . Sawtooth structure

(123)(151)(133). . . Pivot hole

(13). . . Handlebar

(130). . . handle

(14). . . Wheel seat

(140). . . Ring groove

(141). . . Seat cushion

(142). . . Long slot

(143). . . Side panel

(144). . . Ring wall

(145). . . pillar

(15). . . Rear arm

(150). . . Slot

(16). . . Front wheel

(17). . . rear wheel

(170). . . Wheel hub

(171). . . axle

(20). . . Motor-drive mechanism

(30). . . First positioning means

(40). . . Second positioning means

(41). . . Seat

(42). . . Card tip

(420). . . perforation

(421). . . Card segment

(421a). . . Bevel

(422). . . Pull handle

(423). . . Ring

(424). . . Small hole

(43). . . spring

(50). . . Third positioning means

(60). . . Quick release component

(61). . . Trigger

(610). . . Eccentric briquetting

(62). . . Shaft

(63). . . Offset block

(64). . . Compression block

The first figure is a schematic diagram of the appearance of the basic structure of the present invention.

The second figure is a side view of the basic architecture of the present invention.

The third figure is a side view of the folding implementation of the frame of the present invention.

The fourth figure is a schematic view of the folding frame of the present invention.

The fifth drawing is a schematic view of the frame of the present invention after unfolding.

Figure 6 is a schematic cross-sectional view showing a third means of the present invention.

Figure 7 is a schematic cross-sectional view showing the angle of view of the second means of the present invention.

(10). . . Frame

(11). . . Front fork

(110) (131). . . First section

(111) (132). . . Second paragraph

(12). . . Front arm

(120). . . Shaft seat

(121). . . Stepping rod

(13). . . Handlebar

(130). . . handle

(14). . . Wheel seat

(140). . . Ring groove

(141). . . Seat cushion

(142). . . Long slot

(143). . . Side panel

(144). . . Ring wall

(145). . . pillar

(15). . . Rear arm

(16). . . Front wheel

(17). . . rear wheel

(30). . . First positioning means

(40). . . Second positioning means

(41). . . Seat

(422). . . Pull handle

(50). . . Third positioning means

(60). . . Quick release component

(61). . . Trigger

Claims (9)

An electric folding bicycle is rotatably pivotally provided with a front wheel and a rear wheel at two ends of the front and rear of the frame, and drives the front wheel or the rear wheel to rotate by a motor-driven mechanism, wherein the frame comprises: a front fork a rod comprising a first section and a second section which are respectively connected to each other, wherein the bottom end of the second section is pivotally connected to the front wheel; a handlebar has two handles at the top end thereof; and a front arm has one end a shaft seat is provided, the shaft seat is rotatably disposed to enable the handle bar to drive the front wheel to turn; a wheel seat has two side plates juxtaposed, and each side plate has an outwardly convex ring at a periphery thereof The wall defines a ring groove in the inner wall of the ring wall, wherein the ring groove is received by the front wheel, and each of the tops of the two ring walls extends upwardly to a pillar, and the two pillars are connected to a pad, and the rear wheel is connected by an axle. One of the wheel seats is provided with a long groove on a circumferential surface of the ring wall; a rear arm is passed through the long groove of the wheel seat to pivotally connect with the other end of the front arm. The side of the front arm that is in contact with the rear arm is each provided with an intermeshing serration structure The other end of the rear arm is rotatably disposed on the wheel base and coaxial with the rear wheel, so that the rear arm pivots along the long groove with the axis of the rear wheel as a center; a positioning means for disassembling or assembling the first section and the second section of the front fork; a second positioning means for providing when the rear arm pivots relative to the wheel Folding or unfolding positioning; and a third positioning means for controlling the engagement between the sawtooth structures when the front arm pivots relative to the rear arm to provide folding or unfolding Bit. The electric folding bicycle according to claim 1, wherein the motor-driven mechanism is a hub motor disposed on the rear wheel, the hub motor is centered on the axle, and the two ends of the axle are respectively fixed on the two side plates. . The electric folding bicycle according to claim 1, wherein the front side of the shaft arm of the front arm is respectively provided with a stepping rod. The electric folding bicycle according to claim 1, wherein the shaft seat is provided with a bearing assembly for pivoting the handle bar. The electric folding bicycle according to claim 1, wherein the front end of the front fork is provided with a slot, and a through hole is formed at a top end of the second section, the first positioning means includes a connection a cable of the first segment and the second segment, and a quick release assembly, the quick release assembly comprising a trigger having an eccentric clamp, a shaft and a resisting block disposed on one side of the through hole, One end of the shaft is pivoted on the eccentric pressing block, and the other end is connected to the pressing block through the through hole, and when the slot of the first section is pressed against the shaft, the wrench can be pulled The rod drives the long side of the eccentric pressing block to press against the abutting block, and forces the shaft to move toward the pulling rod, thereby causing the pressing block to press the first segment and the second segment to form a positioning. The electric folding bicycle according to claim 1, wherein the handle bar includes a first segment and a second segment, and the first segment and the second segment each have a corresponding pivot hole, and Providing a quick release assembly for providing a folding or unfolding positioning when the first segment pivots relative to the second segment, the quick release assembly includes a trigger having an eccentric clamp a shaft rod and a resisting block disposed on one side of the pivot hole, the shaft rod is pivotally disposed on the eccentric pressing block at one end, and the other end of the shaft rod is disposed through the pivot hole to provide a pressing block. The long side of the eccentric pressing block is pressed against the abutting block, and the shaft can be forced to move in the direction of the pulling rod, thereby forcing the pressing block to force the first segment to form a position with the second segment. The electric folding bicycle of claim 1, wherein the second positioning means comprises a slot in the rear arm and two seats respectively disposed on the wheel base relative to the rear arm. Each of the seats is provided with a through hole corresponding to the slot, and one end of the through hole is provided with an inner convex ring edge, and a hole is formed in the center of the ring edge, the hole receives a card tip, and the middle end of the card bit passes through The small hole has an outer diameter enlarged handle and an outer end having an outer diameter enlarged clamping section, and a spring is arranged between the clamping section and the annular edge, when the clamping section is stressed When the spring is compressed, the clamping section can be retracted into the through hole, and when the clamping section is engaged with the slot, the clamping section is inserted into the slot by the spring force, so that the rear arm Fixed with the wheel seat. The electric folding bicycle according to claim 7, wherein the clamping section has a slope, and when the rear arm approaches the seat body, the clamping section can be pushed along the inclined surface to press the clamping section. The spring is retracted into the perforation. The electric folding bicycle according to claim 1, wherein the front arm and the rear arm each have a corresponding pivot hole, the third positioning means is a quick release component, and the quick release component comprises a a ram of the eccentric pressing block, a shaft rod and a resisting block disposed on one side of the pivot hole, the shaft rod is pivotally disposed on the eccentric pressing block at one end, and the other end is disposed through the pivot hole a pressing block, when the long rod of the eccentric pressing block is pressed against the abutting block, the shaft can be forced to move in the direction of the pulling rod, so that the pressing block is forced to the front arm and the rear The serrated portion of the arm forms a location.