CN204606082U

CN204606082U - Auto-folder Electrical Bicycle

Info

Publication number: CN204606082U
Application number: CN201520105346.8U
Authority: CN
Inventors: 肖庆庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-02-13
Filing date: 2015-02-13
Publication date: 2015-09-02
Anticipated expiration: 2025-02-13

Abstract

The utility model discloses a kind of auto-folder Electrical Bicycle, comprise headstock, install battery pack and folding drive motor in headstock, folding drive motor is connected with battery pack by circuit, and headstock is anterior hinged with front-axle beam one end, front-axle beam can fold by headstock relatively upward, the front-axle beam other end install before bowl group, can transversal stretching between front-axle beam and front bowl group, simultaneously, bowl group can fold downwards by front-axle beam relatively, install front fork in front bowl group, front fork is connected with front wheels.When the utility model is expanded to riding condition, shape and operating mode are all identical with existing Electrical Bicycle, bicyclist does not need to change tradition and to ride custom, and after the utility model folds, two wheels can realize parallel overlap, user can directly tow, be convenient to pass in and out storage room, elevator and public transport means, be convenient to carry out indoor storage and carry with, expansion and folding operation can complete automatically, do not need manual operation, be conducive to the convenience etc. promoting people's trip.

Description

Auto-folder Electrical Bicycle

Technical field

The utility model relates to a kind of electric vehicle, specifically a kind of auto-folder Electrical Bicycle.

Background technology

Current Electrical Bicycle has become indispensable a kind of vehicle in people's life, but the volume of existing Electrical Bicycle is larger, not easily pass in and out storage room, elevator and public transport means, therefore great majority use the use of Electrical Bicycle to be that Electrical Bicycle is parked in open air per family at present, Electrical Bicycle is made often to be subject to solar exposure, wind and weather, this just causes significantly reduce the service life of Electrical Bicycle, and stolen probability is higher.For solving the larger problem of existing Electrical Bicycle volume, those skilled in the art have devised some Foldable electric bicycle products, but larger from weight average due to the storage battery of Electrical Bicycle, motor and vehicle frame, user is difficult to complete folding, expansion operation to folding electric bicycle easily as operation folding bicycle, and therefore this series products does not obtain market accreditation.Once technical personnel was had to propose the imagination of automatic collapsible type Electrical Bicycle before this, but automatic collapsible type Electrical Bicycle there is no ripe design plan at present, scheme disclosed is at present realize the shape that auto-folder function all needs significantly to change existing Electrical Bicycle, such as motor is arranged on front-wheel, front-wheel rear portion only arranges the folding stand etc. of suggestion, the product needed bicyclist that these schemes provide changes traditional custom of riding completely, and turns to and be difficult to flexible manipulation.

Utility model content

The purpose of this utility model is to provide a kind of auto-folder Electrical Bicycle, it automatically can complete folding and launch action, latter two wheel folding can realize parallel overlap, user can directly tow, be convenient to pass in and out storage room, elevator and public transport means, shape after expansion and operating mode are all identical with existing Electrical Bicycle, and bicyclist does not need to change tradition and to ride custom.

The utility model for achieving the above object, be achieved through the following technical solutions: comprise headstock, in headstock, battery pack and folding drive motor are installed, folding drive motor is connected with battery pack by circuit, headstock is anterior hinged with front-axle beam one end, front-axle beam can fold by headstock relatively upward, the front-axle beam other end installs front bowl group, can transversal stretching between front-axle beam and front bowl group, simultaneously, bowl group can fold downwards by front-axle beam relatively, in front bowl group, front fork is installed, front fork is connected with front wheels, both sides, front bowl group top arrange two connecting levers be parallel to each other, connecting lever one end and front bowl group hinged, the connecting lever other end is hinged with casing coupling lower end of protracting, casing coupling upper end of protracting is connected with handlebar, the casing coupling that protracts can be directed to overlapping position parallel with front bowl group from the position that front bowl group is docked when connecting lever rotates around lower end, the casing coupling that protracts can carry out longitudinal extension, headstock rear portion arranges the back rest, the back rest is connected with Rear frame and saddle tube respectively, Rear frame is installed drive motor and trailing wheel, drive motor is connected with battery pack by circuit, vehicle seat is installed on saddle tube top, the back rest and Rear frame can transversal stretchings, Rear frame can fold downwards by the back rest relatively simultaneously, saddle tube can forwards fold by the back rest relatively, headstock, front-axle beam, front bowl group, connecting lever, protract casing coupling, Rear frame and saddle tube flexible, rotate, folding driving device is all connected by the output shaft of mechanical transmissioning piece with folding drive motor.Described headstock, front-axle beam, front bowl group, connecting lever, protract casing coupling, Rear frame and saddle tube flexible, rotate, folding driving device adopts following structure: headstock is anterior hinged with the end top of front-axle beam one end, headstock installs the first gear near one end of front-axle beam, front-axle beam installs the second gear near one end of headstock, first gear and the second gears meshing, first gear is connected with the output shaft of folding drive motor, the front-axle beam other end installs the first overcoat, in first overcoat, the first transversal stretching device is installed, first transversal stretching device periphery arranges the first external toothing, installation the 3rd gear is put outside first, 3rd gear engages with the first external toothing, the rotating shaft of the 3rd gear is connected by the rotating shaft of Transmission with the second gear, first jacket internal shaft core position arranges the first input shaft, first input shaft is connected by the power intake of speed-changing mechanism with the first transversal stretching device, the movable end of the first transversal stretching device is connected with front bowl group by device housing, in front bowl group, front fork is installed, front fork is connected with front wheels, both sides, front bowl group top arrange two connecting levers be parallel to each other, connecting lever one end and front bowl group hinged, the connecting lever other end is hinged with casing coupling lower end of protracting, casing coupling upper end of protracting is connected with handlebar, the casing coupling that protracts is interior installs the first longitudinal extension device, device housing arranges horizontal strip hole near the side of the first transversal stretching device, the movable part of the first transversal stretching device installs driving lever, driving lever inserts in device housing from horizontal strip hole, in device housing, tilting bar is installed, tilting bar be positioned at one end below horizontal strip hole and device housing hinged, tilting bar be positioned at one end above horizontal strip hole and connecting rod one end hinged, hinged with device housing in the middle part of connecting rod, the connecting rod other end and vertical rod lower end hinged, vertical rod top is stretched in front bowl group, side, vertical rod top arranges tooth bar, in front bowl group, the 4th gear is installed, 4th wheel and rack engagement, the rotating shaft of the 4th gear is connected with the jointed shaft between connecting lever and front bowl group by Transmission, jointed shaft between connecting lever with front bowl group is connected with connecting lever and the jointed shaft protracted between casing coupling by the Transmission of connecting lever inside, connecting lever and the jointed shaft protracted between casing coupling are connected by the power intake of speed-changing mechanism with the first longitudinal extension device, the back rest is installed the second overcoat, in second overcoat, the second transversal stretching device is installed, second transversal stretching device periphery arranges the second external toothing, installation the 5th gear is put outside second, 5th gear engages with the second external toothing, the rotating shaft of the 5th gear is connected by the output shaft of Transmission with folding drive motor, second jacket internal shaft core position arranges the second input shaft, second input shaft is connected by the power intake of speed-changing mechanism with the second transversal stretching device, the movable end of the second transversal stretching device is connected with Rear frame, Rear frame is installed drive motor and trailing wheel, drive motor is connected with battery pack by circuit, the 3rd overcoat is installed in second overcoat outside, 3rd overcoat can rotate around the second outer casing outer wall, 3rd outer casing inner wall arranges spiral guide slot, outside the movable part of the second transversal stretching device, projection is installed, projection and spirally-guided slot fit.Headstock, front-axle beam, front bowl group, connecting lever, protract casing coupling, mutually stretch in Rear frame and saddle tube, rotate, between the folding parts coordinated, the jack and latch that cooperatively interact all are set, mounting spring on latch, headstock, front-axle beam, front bowl group, connecting lever, protract casing coupling, when Rear frame and saddle tube move to riding condition respectively, latch inserts in jack under the driving of spring, unlock drive motor is installed in headstock, unlock drive motor is connected with battery pack by circuit, the output shaft of unlocking motor installs reel, reel is connected with each latch respectively by steel rope.Headstock arranged outside handwheel, handwheel is connected with the rotating shaft of reel.One end that headstock installs the back rest arranges telescopic lever.Described first transversal stretching device, the second transversal stretching device are as follows with the structure of the first longitudinal extension device: the first transversal stretching device, the second transversal stretching device are all identical with the structure of the first longitudinal extension device, comprise the outer tube of socket mutually, middle sleeve and inner sleeve, in outer tube, screw rod is installed, screw rod installs swivel nut, and swivel nut is connected with inner sleeve.

The utility model has the advantage of: automatically can complete folding and launch action, do not need manual operation, when the utility model is expanded to riding condition, shape and operating mode are all identical with existing Electrical Bicycle, bicyclist does not need to change tradition and to ride custom, after the utility model is folding, two wheels can realize parallel overlap, user can directly tow, be convenient to pass in and out storage room, elevator and public transport means, be convenient to carry out indoor storage and carry with, expansion and folding operation can complete automatically, do not need manual operation, be conducive to the convenience etc. promoting people's trip.

Accompanying drawing explanation

Fig. 1 is the structural representation that the utility model is expanded to riding condition;

Fig. 2 is the structural representation of the utility model folded state;

Fig. 3 is that the A of Fig. 1 is to structure for amplifying schematic diagram;

Fig. 4 is the structural representations of parts shown in Fig. 3 when the utility model folded state;

Fig. 5 is the structural representation of device housing inside described in the utility model;

Fig. 6 is I portion structure for amplifying schematic diagram in Fig. 1;

Fig. 7 is that the B of Fig. 1 is to structure for amplifying schematic diagram;

Fig. 8 is that the C of Fig. 1 is to structure for amplifying schematic diagram;

Fig. 9 is that the D of Fig. 1 is to structure for amplifying schematic diagram;

Figure 10 be jack described in the utility model and latch cooperatively interact realize locking structural representation.

Detailed description of the invention

Auto-folder Electrical Bicycle described in the utility model comprises headstock 1, in headstock 1, battery pack 2 and folding drive motor 3 are installed, folding drive motor 3 is connected with battery pack 2 by circuit, headstock 1 is anterior hinged with front-axle beam 4 one end, front-axle beam 4 can fold by headstock 1 relatively upward, front-axle beam 4 other end installs front bowl group 7, can transversal stretching between front-axle beam 4 and front bowl group 7, simultaneously, bowl group 7 can fold downwards by front-axle beam 4 relatively, in front bowl group 7, front fork 8 is installed, front fork 8 is connected with front wheels 28, both sides, front bowl group 7 top arrange two connecting levers 18 be parallel to each other, connecting lever 18 one end and front bowl group 7 hinged, connecting lever 18 other end is hinged with casing coupling 9 lower end of protracting, casing coupling 9 upper end of protracting is connected with handlebar 10, the casing coupling 9 that protracts can be directed to overlapping position parallel with front bowl group 7 from the position that front bowl group 7 is docked when connecting lever 18 rotates around lower end, the casing coupling 9 that protracts can carry out longitudinal extension, headstock 1 rear portion arranges the back rest 26, the back rest 26 is connected with Rear frame 29 and saddle tube 33 respectively, Rear frame 29 is installed drive motor 30 and trailing wheel 31, drive motor 30 is connected with battery pack 2 by circuit, vehicle seat 34 is installed on saddle tube 33 top, the back rest 26 and Rear frame 29 can transversal stretchings, Rear frame 29 can fold downwards by the back rest 26 relatively simultaneously, saddle tube 33 can forwards fold by the back rest 26 relatively, headstock 1, front-axle beam 4, front bowl group 7, connecting lever 18, protract casing coupling 9, Rear frame 29 and saddle tube 33 flexible, rotate, folding driving device is all connected by the output shaft of mechanical transmissioning piece with folding drive motor 3.When the utility model is expanded to riding condition, shape and operating mode are all identical with existing Electrical Bicycle, bicyclist does not need to change tradition and to ride custom, and after the utility model folds, two wheels can realize parallel overlap, user can directly tow, be convenient to pass in and out storage room, elevator and public transport means, be convenient to carry out indoor storage and carry with, expansion and folding operation can complete automatically, do not need manual operation, be conducive to the convenience promoting people's trip.

Described headstock 1 described in the utility model, front-axle beam 4, front bowl group 7, connecting lever 18, protract casing coupling 9, Rear frame 29 and saddle tube 33 flexible, rotate, folding driving device can adopt multiple physical construction to realize, wherein preferred structure is: headstock 1 is anterior hinged with the end top of front-axle beam 4 one end, headstock 1 installs the first gear 11 near one end of front-axle beam 4, front-axle beam 4 installs the second gear 12 near one end of headstock 1, first gear 11 engages with the second gear 12, first gear 11 is connected with the output shaft of folding drive motor 3, front-axle beam 4 other end installs the first overcoat 13, in first overcoat 13, first transversal stretching device 5 is installed, first transversal stretching device 5 periphery arranges the first external toothing 14, the 3rd gear 15 installed by first overcoat 13, 3rd gear 15 engages with the first external toothing 14, the rotating shaft of the 3rd gear 15 is connected by the rotating shaft of Transmission with the second gear 12, first overcoat 13 internal axis position arranges the first input shaft 16, first input shaft 16 is connected by the power intake of speed-changing mechanism with the first transversal stretching device 5, the movable end of the first transversal stretching device 5 is connected with front bowl group 7 by device housing 6, in front bowl group 7, front fork 8 is installed, front fork 8 is connected with front wheels 28, both sides, front bowl group 7 top arrange two connecting levers 18 be parallel to each other, connecting lever 18 one end and front bowl group 7 hinged, connecting lever 18 other end is hinged with casing coupling 9 lower end of protracting, casing coupling 9 upper end of protracting is connected with handlebar 10, protracting, casing coupling 9 is interior installs the first longitudinal extension device 17, device housing 6 arranges horizontal strip hole 19 near the side of the first transversal stretching device 5, the movable part of the first transversal stretching device 5 installs driving lever 20, driving lever 20 inserts in device housing 6 from horizontal strip hole 19, in device housing 6, tilting bar 21 is installed, tilting bar 21 be positioned at one end below horizontal strip hole 19 and device housing 6 hinged, tilting bar 21 be positioned at one end above horizontal strip hole 19 and connecting rod 22 one end hinged, hinged with device housing 6 in the middle part of connecting rod 22, connecting rod 22 other end and vertical rod 23 lower end hinged, vertical rod 23 top is stretched in front bowl group 7, side, vertical rod 23 top arranges tooth bar 24, in front bowl group 7, the 4th gear 25 is installed, 4th gear 25 engages with tooth bar 24, the rotating shaft of the 4th gear 25 is connected with the jointed shaft between connecting lever 18 and front bowl group 7 by Transmission, jointed shaft between connecting lever 18 with front bowl group 7 is connected with connecting lever 18 and the jointed shaft protracted between casing coupling 9 by the Transmission of connecting lever 18 inside, connecting lever 18 and the jointed shaft protracted between casing coupling 9 are connected by the power intake of speed-changing mechanism with the first longitudinal extension device 17, the back rest 26 is installed the second overcoat 37, in second overcoat 37, second transversal stretching device 27 is installed, second transversal stretching device 27 periphery arranges the second external toothing 38, the 5th gear 39 installed by second overcoat 37, 5th gear 39 engages with the second external toothing 38, the rotating shaft of the 5th gear 39 is connected by the output shaft of Transmission with folding drive motor 3, second overcoat 37 internal axis position arranges the second input shaft 40, second input shaft 40 is connected by the power intake of speed-changing mechanism with the second transversal stretching device 27, the movable end of the second transversal stretching device 27 is connected with Rear frame 29, Rear frame 29 is installed drive motor 30 and trailing wheel 31, drive motor 30 is connected with battery pack 2 by circuit, the 3rd overcoat 41 is installed in second overcoat 37 outside, 3rd overcoat 41 can rotate around the second overcoat 37 outer wall, 3rd overcoat 41 inwall arranges spiral guide slot 35, outside the movable part of the second transversal stretching device 27, projection 36 is installed, projection 36 coordinates with spiral guide slot 35.Jackknife action between headstock 1 and front-axle beam 4 drives the second gear 12 to rotate by the first gear 11 and realizes, front bowl group 7 rotates realization after being engaged with the first external toothing 14 by the 3rd gear 15 with the jackknife action between front-axle beam 4, the power of the 3rd gear 15 is from the rotating shaft of the second gear 12, transversal stretching between front-axle beam 4 and front bowl group 7 is realized by the first transversal stretching device 5, first transversal stretching device 5 is driven by the first input shaft 16, the power of the first input shaft 16 relatively rotates from the first overcoat 13 and the first transversal stretching device 5, first transversal stretching device 5 by contraction state to when stretching out state variation, driving lever 20 on first transversal stretching device 5 movable part is traversing along the horizontal strip hole 19 of device housing 6, tilting bar 21 is pressed down, tilting bar 21 drivening rod 22 rotates, drive in vertical rod 23 and move, tooth bar 24 in vertical rod 23 drives the 4th gear 25 to rotate, 4th gear 25 drives connecting lever 18 to rotate, in connecting lever 18 rotary course, inner Transmission drives the first longitudinal extension device 17 to stretch, folding between Rear frame 29 with the back rest 26 rotates realization after being engaged with the second external toothing 38 by the 5th gear 39, the back rest 26 is realized by the second transversal stretching device 27 with the transversal stretching of Rear frame 29, second transversal stretching device 27 is driven by the second input shaft 40, the power of the second input shaft 40 is from relatively rotating between the second overcoat 37 and the second transversal stretching device 27, second transversal stretching device 27 by contraction state to when stretching out state variation, projection 36 on second transversal stretching device 27 movable part is traversing, 3rd overcoat 41 is rotated, thus realize saddle tube 33 relatively the back rest 26 forwards fold.Said structure can by the transmission of power of drive motor 3 folding in headstock 1 to each action component, and there is the advantage that transmission of power precision is high, compact conformation, Transmission do not expose, in addition, the utility model also can adopt other multiple drive mechanism, the execution unit etc. of such as rope traction, but the transmission accuracy of these drive mechanisms is relatively low, structure loosely etc.

Headstock 1 when the utility model is for preventing riding condition, front-axle beam 4, front bowl group 7, connecting lever 18, protract casing coupling 9, the position cooperatively interacted between Rear frame 29 and saddle tube 33 is surprisingly opened, can at headstock 1, front-axle beam 4, front bowl group 7, connecting lever 18, protract casing coupling 9, mutually stretch in Rear frame 29 and saddle tube 33, rotate, between the folding parts coordinated, the jack 42 and latch 43 that cooperatively interact all are set, mounting spring 44 on latch 43, headstock 1, front-axle beam 4, front bowl group 7, connecting lever 18, protract casing coupling 9, when Rear frame 29 and saddle tube 33 move to riding condition respectively, latch 43 inserts in jack 42 under the driving of spring 44, unlock drive motor 45 is installed in headstock 1, unlock drive motor 45 is connected with battery pack 2 by circuit, the output shaft of unlocking motor 45 is installed reel 48, reel 48 is connected with each latch 43 respectively by steel rope 46.Automatically lock between each parts when this structure can make the utility model launch, time folding, realize automatic unlocking by unlocking motor 45 haulage cable.In addition, for enabling the utility model manually remove locking between each parts when battery pack 2 electricity exhausts, hand foldable is carried out, can at headstock 1 arranged outside handwheel 47, handwheel 47 is connected with the rotating shaft of reel 48.When battery pack 2 electricity exhausts, user carrys out haulage cable realization unblock by rotation hand wheel 47.

The utility model arranges telescopic lever 49 for ease of the one end towing or carry out after folding to install the back rest 26 at headstock 1.Telescopic lever 49 is when the utility model launches in retraction headstock 1, and after the utility model has folded, telescopic lever 49 can pull out by user, is convenient to tow or carry out, and the Electrical Bicycle after folding is easy to carry.

First transversal stretching device 5, second transversal stretching device 27 described in the utility model and the first longitudinal extension device 17 can adopt various structures, such as: the first transversal stretching device 5, second transversal stretching device 27 is all identical with the structure of the first longitudinal extension device 17, comprise the outer tube 50 of socket mutually, middle sleeve 51 and inner sleeve 52, in outer tube 50, screw rod 53 is installed, screw rod 53 is installed swivel nut 54, swivel nut 54 is connected with inner sleeve 52.The simple structure of this structure, take up room little, in addition, the first transversal stretching device 5, second transversal stretching device 27 described in the utility model and the first longitudinal extension device 17 also can adopt other various structures such as the straight-line motion guide rod of planet gear drives to realize Telescopic.

Claims

1. auto-folder Electrical Bicycle, it is characterized in that: comprise headstock (1), in headstock (1), battery pack (2) and folding drive motor (3) are installed, folding drive motor (3) is connected with battery pack (2) by circuit, headstock (1) is anterior hinged with front-axle beam (4) one end, front-axle beam (4) can fold by headstock (1) relatively upward, front-axle beam (4) other end installs front bowl group (7), can transversal stretching between front-axle beam (4) and front bowl group (7), simultaneously, bowl group (7) can fold downwards by front-axle beam (4) relatively, in front bowl group (7), front fork (8) is installed, front fork (8) is connected with front wheels (28), front bowl group (7) both sides, top arrange two connecting levers (18) be parallel to each other, connecting lever (18) one end and front bowl group (7) hinged, connecting lever (18) other end is hinged with casing coupling (9) lower end of protracting, casing coupling (9) upper end of protracting is connected with handlebar (10), the casing coupling that protracts (9) can be directed to and the front parallel overlapping position of bowl group (7) from the position that front bowl group (7) is docked when connecting lever (18) rotates around lower end, the casing coupling (9) that protracts can carry out longitudinal extension, headstock (1) rear portion arranges the back rest (26), the back rest (26) is connected with Rear frame (29) and saddle tube (33) respectively, Rear frame (29) is installed drive motor (30) and trailing wheel (31), drive motor (30) is connected with battery pack (2) by circuit, vehicle seat (34) is installed on saddle tube (33) top, the back rest (26) and Rear frame (29) can transversal stretchings, Rear frame (29) can fold downwards by the back rest (26) relatively simultaneously, saddle tube (33) can forwards fold by the back rest (26) relatively, headstock (1), front-axle beam (4), front bowl group (7), connecting lever (18), protract casing coupling (9), Rear frame (29) and saddle tube (33) flexible, rotate, folding driving device is all connected by the output shaft of mechanical transmissioning piece with folding drive motor (3).

2. auto-folder Electrical Bicycle according to claim 1, it is characterized in that: described headstock (1), front-axle beam (4), front bowl group (7), connecting lever (18), protract casing coupling (9), Rear frame (29) and saddle tube (33) flexible, rotate, folding driving device adopts following structure: headstock (1) is anterior hinged with the end top of front-axle beam (4) one end, headstock (1) installs the first gear (11) near one end of front-axle beam (4), front-axle beam (4) installs the second gear (12) near one end of headstock (1), first gear (11) engages with the second gear (12), first gear (11) is connected with the output shaft of folding drive motor (3), front-axle beam (4) other end installs the first overcoat (13), in first overcoat (13), the first transversal stretching device (5) is installed, first transversal stretching device (5) periphery arranges the first external toothing (14), the upper installation the 3rd gear (15) of first overcoat (13), 3rd gear (15) engages with the first external toothing (14), the rotating shaft of the 3rd gear (15) is connected by the rotating shaft of Transmission with the second gear (12), first overcoat (13) internal axis position arranges the first input shaft (16), first input shaft (16) is connected by the power intake of speed-changing mechanism with the first transversal stretching device (5), the movable end of the first transversal stretching device (5) is connected with front bowl group (7) by device housing (6), in front bowl group (7), front fork (8) is installed, front fork (8) is connected with front wheels (28), front bowl group (7) both sides, top arrange two connecting levers (18) be parallel to each other, connecting lever (18) one end and front bowl group (7) hinged, connecting lever (18) other end is hinged with casing coupling (9) lower end of protracting, casing coupling (9) upper end of protracting is connected with handlebar (10), the casing coupling (9) that protracts is interior installs the first longitudinal extension device (17), device housing (6) arranges horizontal strip hole (19) near the side of the first transversal stretching device (5), the movable part of the first transversal stretching device (5) installs driving lever (20), driving lever (20) inserts in device housing (6) from horizontal strip hole (19), in device housing (6), tilting bar (21) is installed, tilting bar (21) be positioned at horizontal strip hole (19) below one end and device housing (6) hinged, tilting bar (21) be positioned at horizontal strip hole (19) top one end and connecting rod (22) one end hinged, connecting rod (22) middle part is hinged with device housing (6), connecting rod (22) other end and vertical rod (23) lower end hinged, vertical rod (23) top is stretched in front bowl group (7), vertical rod (23) side, top arranges tooth bar (24), in front bowl group (7), the 4th gear (25) is installed, 4th gear (25) engages with tooth bar (24), the rotating shaft of the 4th gear (25) is connected with the jointed shaft between connecting lever (18) and front bowl group (7) by Transmission, jointed shaft between connecting lever (18) with front bowl group (7) is connected with the jointed shaft between connecting lever (18) and the casing coupling that protracts (9) by the Transmission that connecting lever (18) is inner, jointed shaft between connecting lever (18) and the casing coupling that protracts (9) is connected by the power intake of speed-changing mechanism with the first longitudinal extension device (17), upper installation second overcoat (37) of the back rest (26), in second overcoat (37), the second transversal stretching device (27) is installed, second transversal stretching device (27) periphery arranges the second external toothing (38), the upper installation the 5th gear (39) of second overcoat (37), 5th gear (39) engages with the second external toothing (38), the rotating shaft of the 5th gear (39) is connected by the output shaft of Transmission with folding drive motor (3), second overcoat (37) internal axis position arranges the second input shaft (40), second input shaft (40) is connected by the power intake of speed-changing mechanism with the second transversal stretching device (27), the movable end of the second transversal stretching device (27) is connected with Rear frame (29), Rear frame (29) is installed drive motor (30) and trailing wheel (31), drive motor (30) is connected with battery pack (2) by circuit, the 3rd overcoat (41) is installed in second overcoat (37) outside, 3rd overcoat (41) can rotate around the second overcoat (37) outer wall, 3rd overcoat (41) inwall arranges spiral guide slot (35), outside the movable part of the second transversal stretching device (27), projection (36) is installed, projection (36) coordinates with spiral guide slot (35).

3. auto-folder Electrical Bicycle according to claim 1, it is characterized in that: headstock (1), front-axle beam (4), front bowl group (7), connecting lever (18), protract casing coupling (9), mutually stretch in Rear frame (29) and saddle tube (33), rotate, between the folding parts coordinated, the jack (42) and latch (43) that cooperatively interact all are set, the upper mounting spring (44) of latch (43), headstock (1), front-axle beam (4), front bowl group (7), connecting lever (18), protract casing coupling (9), when Rear frame (29) and saddle tube (33) move to riding condition respectively, latch (43) inserts in jack (42) under the driving of spring (44), in headstock (1), unlock drive motor (45) is installed, unlock drive motor (45) is connected with battery pack (2) by circuit, the output shaft of unlocking motor (45) is installed reel (48), reel (48) is connected with each latch (43) respectively by steel rope (46).

4. auto-folder Electrical Bicycle according to claim 3, is characterized in that: headstock (1) arranged outside handwheel (47), and handwheel (47) is connected with the rotating shaft of reel (48).

5. auto-folder Electrical Bicycle according to claim 1, is characterized in that: one end that headstock (1) installs the back rest (26) arranges telescopic lever (49).

6. auto-folder Electrical Bicycle according to claim 2, it is characterized in that: described first transversal stretching device (5), the structure of the second transversal stretching device (27) and the first longitudinal extension device (17) is as follows: the first transversal stretching device (5), second transversal stretching device (27) is all identical with the structure of the first longitudinal extension device (17), comprise the outer tube (50) of socket mutually, middle sleeve (51) and inner sleeve (52), in outer tube (50), screw rod (53) is installed, screw rod (53) is installed swivel nut (54), swivel nut (54) is connected with inner sleeve (52).