CN2478919Y

CN2478919Y - Four-gear inner speed-changing rear wheel driving device

Info

Publication number: CN2478919Y
Application number: CN 01204835
Authority: CN
Inventors: 刘雄飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-19
Filing date: 2001-01-19
Publication date: 2002-02-27
Anticipated expiration: 2011-01-19

Abstract

The utility model relates to a four grade inner variable speed rear wheel driving device for a bicycle, which comprises three portions which are a four grade inner variable speed transmission, a rear wheel driving device with a rear shock absorber and a variable speed control device, wherein through an inner gear, a sprocket and a chain are mutually collocated, the inner variable speed transmissions which have virious structure types are capable of being changed. The utility model has the advantages of reliable and impact structure and design, novel and beautiful shape, stable driving, convenient operation, excellent damping effect, particularly in the event of no environment pollution, the highest speed of the bicycle is 120 kilometre in per hour, thereby further meeting the higher requirements of the expectation of the modern people for the bicycle.

Description

Rear wheel driver with internal 4-gear speed variation

The utility model is a kind of rear wheel driver with internal 4-gear speed variation that is used for bicycle.

Though the existing outer variable speed bicycle that has shock attenuation unit is ridden comfortablely than traditional in the past ordinary bicycle, speed also increases, and also has some deficiency.At first, outer speed change drive mechanism design is not compact, almost all is exposed, and is difficult to the cleaning maintenance, and wearing and tearing easily, though several speed changes are arranged, poor practicability, secondly, effectiveness in vibration suppression is undesirable, simultaneously the center of oscillation of back vent departs from the centre of sprocket on the axis, and the trailing wheel swing constantly changes sprocket wheel on the axis and the width between centers between the flywheel on the trailing wheel, makes chain be in very transmission in the unsure state always.

The present invention will provide a kind of structure design more reasonable, compact, transmission is stable, speed is higher, effectiveness in vibration suppression is better, and the rear wheel driver with internal 4-gear speed variation of novel and beautiful appearance, its keystone configuration is by fourth gear internal speed-changing driving device, and the back-wheel drive device and speed-change control device three parts that have rear shock absorber are formed.

A. fourth gear internal speed-changing driving device, Fig. 2, long bushing (41) is housed respectively, the left cap (47) of lining (4), right cap (2) is fixed in centre housing (1) both sides by screw (48), with axis (7) two ends that inner gear (A) fuses bearing (43) is housed respectively, setting nut (6) and the left and right sides crank (42) that has step (49), (3), planetary wheel (12) is gone up positioning and fixing by pin (11) in pinion carrier (10), between planetary wheel (12) and axis (7), gear wheel shaft (9) is housed, between driving gear (46) on the gear wheel shaft (9) and the lining (8) pull back spring (38) is housed, between driving gear (46) and the gear wheel shaft (9) is the bearing fit of spline and spline, between long bushing (41) on the left cap (47) and axis (7), torsion spring (44) is housed, on long bushing (41), be equipped with respectively and advance cover (39) and back and forth overlap (40), is concavo-convex right-angled trapezium about 40 degree advancing cover (39) with the base angle that has that back and forth two adjacent end faces have two corresponding cooperations between the cover (40), and back and forth overlapping between (40) and the long bushing (41) is the bearing fit of spline and spline.The other end of torsion spring (44) is connected with advancing the pull bar (B) that overlaps on (39), back and forth between cover (40) and the driving gear (46) steel ball (45) is housed, pass a bridge and between axle (14) and the carrier gear (36) bearing (37) is housed, and back-up ring (15) is housed in bearing (37) outer end, pass a bridge and be located by connecting by key (13) between axle (14) and the right cap (2), reciprocal cover (32) is housed on the axle (18) of passing a bridge and advances cover (19), is concavo-convex right-angled trapezium about 40 degree advancing cover (19) with the base angle that has that back and forth two adjacent end faces have two corresponding cooperations between the cover (32), is the bearing fit of spline and spline between cover (32) and the gap bridge spool (18) back and forth.The other end that is contained in the torsion spring (16) on the right cap (2) is connected with advancing the pull bar (C) that overlaps on (19), pass a bridge and be located by connecting by key (17) between axle (18) one ends and the right cap (2), between carrier gear (31) and reciprocal cover (32), bearing (33) is housed, between bearing (33) and the left cap (47) pull back spring (34) is housed, output gear (26) is housed on the output shaft (29) and is located by connecting by key (23), output shaft (29) two ends respectively with regulate locating bush (24), bearing (28) is housed (30), screwed adjusting locating bush (24), (30) respectively in the both sides positioning and fixing of centre housing (1), output shaft (29) outer end is equipped with sprocket wheel (20) and is located by connecting by key (21), and screw (22) is fixing.

B. the back-wheel drive device that has shock absorber: on the rear axle (61) between back vent (54) the two back connecting panels (R), trailing wheel floral disc (52) is housed, quill shaft (X) two ends in trailing wheel floral disc (52) are equipped with bearing (60) and setting nut (62) respectively, in trailing wheel floral disc (52) left side flywheel (63) is housed, rear axle (61) two ends are fastened by nut (64) assembly, connecting panel (27) before about two on the back vent (54), (25) respectively by regulating locating bush (24), (30) flexibly connect in centre housing (1) left and right sides, sprocket wheel (20) on output shaft (29) outer end is connected by chain (51) with flywheel (63) on the trailing wheel floral disc (52), rear shock absorber (56) is threaded by joint (68) and sleeve pipe (69), slide bar (65) is located by connecting by key (66) in sleeve pipe (69), between sleeve pipe (69) and slide bar (65), damper spring (70) is housed, respectively by screw (67), pin (85) flexibly connects between chuck (57) on the vehicle frame (59) and the after poppet (55) on the back vent (54) for joint (68) on the rear shock absorber (56) and slide bar (65).

C. speed-change control device: the speed change traction box (72 left side) with spline structure is housed respectively on the hollow tube (79) of left side tap (75) and right leading (73), (72 right side), on speed change traction box (72 left side), the traction wheel (83) of band miniature gears (E) is housed in the housing (74) on (72 right side), the gear change hand lever (71 left side) of band driving gear (M), the ring gear (76) of (71 right side) and band miniature gears (D) is at hollow tube (79) and gear change hand lever (71 left side), the spring housing (80) of band positioning head (H) is housed between (71 right side), have on the hollow tube (79) two intervals be about 60 degree angles and with spring housing (80) on the positioning groove of the corresponding cooperation of positioning head (H), lid (77) and ring gear (76) are respectively by screw (78), (81) positioning and fixing, speed change steel rope (82), (84) one respectively on speed change traction box (72 left side), groove (G) internal fixation of (72 right side) interior traction wheel (83) side, speed change steel rope (82), (84) other end enters in the fourth gear internal speed-changing driving device (50) by bend pipe (58) hollow bulb under the vehicle frame (57) overlaps (39) with propelling respectively, (19) pull bar on (B), (C) connect, spike (177) is flexibly connected in centre housing (1) bottom by pin (178).In addition, except that a kind of structure of above-mentioned fourth gear internal speed-changing driving device, by internal gear, the mutual collocation of sprocket wheel and chain, can be transformed into the version of multiple speed, third gear internal speed-changing driving device, single speed sprocket wheel, chain gearing and single speed gear system are wherein arranged.Third gear internal speed-changing driving device: Fig. 6, long bushing (116) is housed respectively, lining (89) and left cap (122), right cap (87) is fixed in centre housing (123) both sides by screw (86), with axis (90) two ends that gear (P) fuses bearing (92) is housed respectively, setting nut (91) and the left crank (118) and the right crank (88) that have step (49), between driving gear (121) and the axis (90) is the bearing fit of spline and spline, between the gear (P) on driving gear (121) and the axis (90) pull back spring (93) is housed, on long bushing (116), be equipped with and advance cover (119) and back and forth overlap (120), advancing the cover (119) and the base angle that has that back and forth two adjacent end faces have two corresponding cooperations between the cover (120) is concavo-convex terraced right-angled trapezium about 40 degree, and back and forth overlapping between (120) and the long bushing (116) is the bearing fit of spline and spline.Back and forth between cover (120) and the driving gear (121) steel ball (115) is housed, between long bushing (116) inwall and axis (90), torsion spring (117) is housed, the other end of torsion spring (117) is connected with advancing the pull bar (T) that overlaps on (119), on the axle (94) of passing a bridge, be equipped with and advance cover (112) and reciprocal cover (110), advancing cover (112) is 40 concavo-convex right-angled trapezium about spending with the base angle that has that back and forth two adjacent end faces have two corresponding cooperations between the cover (110), be the bearing fit of spline and spline between cover (110) and the gap bridge axle (94) back and forth, back and forth between cover (110) and the carrier gear (109) bearing (96) and lining (97) are being housed, in bearing (96) outer end ring washer (111) is housed, pass a bridge and be located by connecting by key (113) between axle (94) and the left cap (122), advance between cover (112) and the left cap (122) torsion spring (114) is housed, one end of torsion spring (114) is connected with advancing the pull bar (W) that overlaps on (112), back and forth between cover (110) and the right cap (87) pull back spring (95) is housed, output gear (103) is housed on the output shaft (107) and is located by connecting by key (98), output shaft (107) two ends respectively with regulate locating bush (102), bearing (106) is housed (108), connecting panel (105) before about on the back vent (54), (104) respectively by screwed adjusting locating bush (108), (102) flexibly connect in centre housing (123) both sides, output shaft (107) outer end is equipped with sprocket wheel (101) and is located by connecting by key (99), and screw (100) is fixing.

The single speed sprocket wheel, chain gearing: Fig. 8, left cap (174) and right cap (153) that lining (172) are housed are respectively fixed in centre housing (175) both sides by screw (152), drive sprocket (156) is housed on axis (155) and is located by connecting by key (173), bearing (171) is equipped with at axis (155) two ends respectively, setting nut (170) and the left and right sides crank (169) that has step (49), (154), output chain gear (168) is housed on the output shaft (165) and is located by connecting by key (158), output shaft (165) two ends respectively with regulate locating bush (166), bearing (167) is housed (159), connecting panel (164) before about on the back vent (54), (163) respectively by screwed adjusting locating bush (166), (159) flexibly connect in centre housing (175) both sides, drive sprocket (156) is connected by chain (157) with output chain gear (168), output shaft (165) outer end is equipped with sprocket wheel (162) and is located by connecting by key (160), and screw (161) is fixing.

Single speed gear system: Fig. 7, left cap (150) and right cap (125) that lining (126) are housed are respectively fixed in centre housing (151) both sides by screw (124), driving gear (149) is housed on axis (128) and is located by connecting by key (148), the left and right sides crank (147) that axis (128) two ends are equipped with bearing (130) and setting nut (129) respectively and are had step (49), (127), between gap bridge axle (143) and carrier gear (146), bearing (145) is housed, in bearing (145) outer end back-up ring (144) is housed, pass a bridge and be located by connecting by key (131) between axle (143) and the right cap (125), output gear (142) is housed on the output shaft (140), and be located by connecting by key (141), output shaft (140) two ends respectively with regulate locating bush (139), bearing (138) is housed (132), connecting panel (137) before about on the back vent (54), (136) respectively by screwed adjusting locating bush (139), (132) in (151) two flexible connections of centre housing, output shaft (140) outer end is equipped with sprocket wheel (135) and is located by connecting by key (133), and screw (134) is fixing.

By accompanying drawing rear wheel driver with internal 4-gear speed variation is described in further detail below:

The control position figure of Fig. 1 the utility model on bicycle

Fig. 2 fourth gear internal speed-changing driving device cutaway view

Trailing wheel floral disc actuating device cutaway view on Fig. 3 trailing wheel

The cutaway view of Fig. 4 rear shock absorber

Fig. 5 tap birds-eye view and speed-change control device cutaway view

Fig. 6 third gear internal speed-changing driving device cutaway view

Fig. 7 single speed gear system cutaway view

Fig. 8 single speed sprocket wheel, chain gearing cutaway view

Fig. 1,2, at first select low gear, step (49) drives the left crank (42) of fourth gear internal speed-changing driving device (50) both sides, right crank (3), when axis (7) is rotated, the inner gear (A) that fuses with axis (7) drives planetary wheel (12) on the pinion carrier (10) when the pin (11) on the pinion carrier (10) rotates, planetary wheel (12) with inner gear (A) forward direction rotate together around axis (7) axle center, driving gear (46), between lining (8) and the gear wheel shaft (9) is the bearing fit of spline and spline, planetary wheel (12) driven gear axle (9) that matches with gear wheel shaft (9) and the driving gear (46) on the gear wheel shaft (9), lining (8), pull back spring (38) together around axis (7) axle center the rear opposite with planetary wheel (12) to rotation, because the effect of steel ball (45), alleviated the friction force between driving gear (46) and the reciprocal cover (40) greatly, at this moment, miniature gears drive gap bridge axle (14) on the driving gear (46) is gone up the big gear wheel of carrier gear (36) and is walked around bridge axle (14) court the place ahead opposite with driving gear (46) to rotation, passing a bridge between axle (14) and the right cap (2) is to be located by connecting by key (13), simultaneously, because the effect of back-up ring (15), carrier gear (36) can only be walked around bridge axle (14) axle center and rotate on the position that the axle (14) of passing a bridge is fixed, pass a bridge and be located by connecting by key (17) between axle (18) and the right cap (2), when the big gear wheel that the miniature gears on the carrier gear (36) drives on the carrier gear (31) is walked around bridge axle (18) the axle center court rear opposite with carrier gear (36) when rotating, the axle (18) of passing a bridge maintains static, at this moment the big gear wheel on the carrier gear (31) drive the output gear (26) on the output shaft (29) and connect flywheel (63) on the trailing wheel floral disc (52) and the chain (51) on the sprocket wheel (20) together court the place ahead opposite with carrier gear (31) to rotation, and by trailing wheel (53) promotion front-wheel (176) advance the puck, the ratio of the gear diameter on inner gear (A) on the axis (7) and the gear wheel shaft (9) is three to one, when the inner gear (A) on the axis (7) rotates a circle, inner gear (A) on the axis (7) encloses gear wheel shaft (9) by planetary wheel (12) simultaneously to rotating three towards opposite rear, at this moment, driving gear (46) on the gear wheel shaft (9) also rotates three circles with gear wheel shaft (9) simultaneously, through slowing down, when axis (7) rotates a circle, trailing wheel (53) only rotates about half-turn, this starting and load-carrying to bicycle is gone up a slope all very favourable, when needs raise speed, can select mid ranger, during speed change, after both feet stop firmly, bicycle moves in inertia, when left hand rotates about 60 degree angles forward with the gear change hand lever (71 left side) on the left side tap (75), spring housing (80) in the gear change hand lever (71 left side) rotates about 60 degree angles with speed change handle (71 left side), and by in the location in the elongated slot of the corresponding cooperation of positioning head (H) of the positioning head (H) on the spring housing (80) on hollow tube (79) and spring housing (80), miniature gears (D) on driving gear (M) the drive ring gear (76) on the gear change hand lever (71 left side) is when screw (78) rotates, the miniature gears (F) that ring gear (76) drives on the traction wheel (83) rotates forward around hollow tube (79), the speed change steel rope (82) that is fixed in traction wheel (83) lateral grooves (G) is pulled when tightening up a segment distance with the rotation of traction wheel (83), the interior long bushing of fourth gear internal speed-changing driving device (50) (41) go up to advance the pull bar (B) on the cover (39) to be spurred by speed change steel rope (82) and overcomes torsion spring (44) elastic force and rotate an angle forward, owing to be the bearing fit of spline and spline between cover (40) and the long bushing (41) back and forth, simultaneously, advancing cover (39) is 40 concavo-convex right-angled trapezium about spending with the base angle that has that back and forth two adjacent ends have two corresponding cooperations between the cover (40), therefore, when advancing cover (39) to rotate an angle forward, because the effect on concavo-convex right-angled trapezium inclined-plane, when advancing cover (39) will back and forth overlap (40) to advance along the right axis direction of long bushing (41), the pressure that overcomes pull back spring (38) advances driving gear (46) distance of a paragraph qualification, at this moment, when the miniature gears disengaging gap bridge tooth (36) on the driving gear (46) is gone up big gear wheel, miniature gears overlap joint transmission on big gear wheel on the driving gear (46) and the carrier gear (36), at this moment, both feet firmly scrunch left and right sides crank (42), (3) step on (49), bicycle just advances in the middling speed state.When bicycle need advance at utmost speed, both feet stop firmly, bicycle continues to move in inertia, left hand is spent angles to rotating about 60 towards the rear with the gear change hand lever (71 left side) on the left side tap (75), return to the preceding original position of speed change for the first time, drive traction wheel (83) towards the rear to when hollow tube (79) rotates by ring gear (76), speed change steel rope (82) is broadcasted a segment distance, because the effect of torsion spring (44) between interior long bushing of fourth gear internal speed-changing driving device (50) (41) and the axis (7), to advance cover (39) towards the rear to rotating an angle, at this moment, because the effect of pull back spring (38) thrust, the left axis direction of driving gear (46) along gear wheel shaft (9) promoted, in the time of the miniature gears on the disengaging carrier gear of the big gear wheel on the driving gear (46) (36), big gear wheel overlap joint on miniature gears on the driving gear (46) and the carrier gear (36), simultaneously, the right hand will overcome right cap (2) and advance the torsion of torsion spring (16) between the cover (19), and the thrust of pull back spring (34) between left cap (47) and the bearing (33), the gear change hand lever (71 right side) on the right tap (73) forward direction rotate about 60 degree angles, equally, the traction wheel (83) in the right speed change traction box (72 right side) tightens up a segment distance with speed change steel rope (84), and the other end that is fixed on the speed change steel rope (84) on the pull bar (C) that advances in the fourth gear internal speed-changing driving device (50) on the cover (19) will advance cover (19) towards the rear to walking around the about 60 degree angles of bridge axle (18) rotational, owing to be the bearing fit of spline and spline between cover (32) and the gap bridge axle (18) back and forth, and since back and forth cover (32) be the effect of the concavo-convex right-angled trapezium ramp about 40 degree with the base angle that has that advances two abutting ends between the cover (19) to wear two corresponding cooperations, advance cover (19) will back and forth overlap (32) and carrier gear (31) along the left axis direction promotion of the axle (18) of passing a bridge, at this moment, big gear wheel on the carrier gear (31) breaks away from the miniature gears on the carrier gear (36), big gear wheel overlap joint on miniature gears on the carrier gear (31) and the carrier gear (36), at this moment, both feet firmly scrunch left and right sides crank (42), (3) step on (49), bicycle just advances in fast state, when needing hyper-speed to advance, same, both feet stop firmly, bicycle continues to advance in inertial states, the gear shifting operation program is the same when transforming to mid ranger with the first time, and left hand will overcome the thrust of the torsion and the pull back spring (38) of torsion spring (44), and the gear change hand lever (71 left side) on the left side tap (75) is rotated about 60 degree angles forward, at this moment, when advancing cover (39) to rotate an angle forward, back and forth cover (40) and driving gear (46) are promoted towards the right axis direction of gear wheel shaft (9), the miniature gears that axis (7) is gone up driving gear (46) breaks away from carrier gear (36) upward big gear wheel the time, miniature gears overlap joint on big gear wheel on the driving gear (46) and the carrier gear (36), at this moment, the miniature gears overlap joint on big gear wheel on the carrier gear (36) and the carrier gear (31), and the overlap joint of the output gear (26) on big gear wheel on the carrier gear (31) and the output shaft (29), both feet firmly scrunch gradually, the moving circle of axis (7) revolution, trailing wheel (53) will rotate about 14 circles, at this moment, when axis (7) per minute rotates 75 circles, the maximum speed of bicycle will reach per hour 120 kilometers, and will be when needing to slow down, same, both feet stop firmly, bicycle continues to move in inertia, and towards the rear to rotating about 60 degree angles, the traction wheel (83) in the speed change traction box (72 right side) is broadcasted a segment distance with speed change steel rope (84) to the right hand with the gear change hand lever (71 right side) on the right tap (73), because the torsion of torsion spring (16) and the effect of pull back spring (34) thrust, advance cover (19) walk around bridge axle (18) forward direction rotate an angle, when the miniature gears on the carrier gear (31) broke away from big gear wheel on the carrier gear (36), the miniature gears on the big gear wheel on the carrier gear (31) and the carrier gear (36) overlapped, at this moment, both feet firmly scrunch, and bicycle just advances in the middling speed state, in the time of by bike, because the effect of human body gravity, when the damper spring (70) on the rear shock absorber (56) compressed a segment distance, slide bar (65) is the interior segment distance of while indentation sleeve pipe (69) also, is the center of circle with rear axle (61), connecting panel (27) before about on the back vent (54), (25) with the adjusting locating bush (30) that is fixed on the centre housing (1), (24) between simultaneously in relative rotation, the vehicle frame (59) that fuses with centre housing (1) segment distance that sinks, and make saddle (179) remain on certain height is when running into rugged road surface, impact shock continuously, make the damper spring (70) on the rear shock absorber (56) continuously flexible up and down thereupon, thereby alleviated the influence of impact shock greatly human body and since on the back vent (54) about before connecting panel (27), (25) with output shaft (29) on sprocket wheel (20) be same axle center, width between centers between the flywheel (63) on sprocket wheel (20) and the trailing wheel floral disc (52) is changeless, therefore, no matter the size of vehicle frame (59) height constantly changes, the width between centers between the flywheel (63) on sprocket wheel (20) and the trailing wheel floral disc (52) can not change, therefore, make chain (51) continuously motion very stably.

The utility model compactness rational in infrastructure, novel and beautiful appearance, transmission is stable, easy to operate, and have excellent vibration damping effect, pass through internal gear, and the mutual collocation of sprocket wheel, chain, internal speed-changing driving device, especially the utility model of can be transformed into multiple version are under the situation of non-environmental-pollution, and hyper-speed travels and further satisfied modern people's higher demand.

Claims

1. the utility model is a kind of rear wheel driver with internal 4-gear speed variation of using on bicycle, it is characterized in that: the utility model is mainly by fourth gear internal speed-changing driving device, and the back-wheel drive device and speed-change control device three parts that have rear shock absorber are formed,

A. fourth gear internal speed-changing driving device: long bushing (41) is housed respectively, the left cap (47) of lining (4), right cap (2) is fixed in centre housing (1) both sides by screw (48), with axis (7) two ends that inner gear (A) fuses bearing (43) is housed respectively, setting nut (6) and the left and right sides crank (42) that has step (49), (3), planetary wheel (12) is gone up positioning and fixing by pin (11) in pinion carrier (10), between planetary wheel (12) and axis (7), gear wheel shaft (9) is housed, between driving gear (46) on the gear wheel shaft (9) and the lining (8) pull back spring (38) is housed, between driving gear (46) and the gear wheel shaft (9) is the bearing fit of spline and spline, between long bushing (41) on the left cap (47) and axis (7), torsion spring (44) is housed, on long bushing (41), be equipped with respectively and advance cover (39) and back and forth overlap (40), the other end of torsion spring (44) is connected with advancing the pull bar (B) that overlaps on (39), back and forth between cover (40) and the driving gear (46) steel ball (45) is housed, pass a bridge and between axle (14) and the carrier gear (36) bearing (37) is housed, and back-up ring (15) is housed in bearing (37) outer end, pass a bridge and be located by connecting by key (13) between axle (14) right-hand member and the right cap (2), reciprocal cover (32) is housed on the axle (18) of passing a bridge and advances cover (19), the other end that is contained in the torsion spring (16) on the right cap (2) is connected with advancing the pull bar (C) that overlaps on (19), pass a bridge and be located by connecting by key (17) between axle (18) one ends and the right cap (2), between carrier gear (31) and reciprocal cover (32), bearing (33) is housed, between bearing (33) and the left cap (47) pull back spring (34) is housed, output gear (26) is housed on the output shaft (29) and is located by connecting by key (23), output shaft (29) two ends respectively with regulate locating bush (24), bearing (28) is housed (30), screwed adjusting locating bush (24), (30) respectively in the both sides positioning and fixing of centre housing (1), output shaft (29) outer end is equipped with sprocket wheel (20) and is located by connecting by key (21), screw (22) is fixing

B. the back-wheel drive device that has rear shock absorber: on the rear axle (61) between back vent (54) the two back connecting panels (R), trailing wheel floral disc (52) is housed, quill shaft (X) two ends in trailing wheel floral disc (52) are equipped with bearing (60) and setting nut (62) respectively, in trailing wheel floral disc (52) left side flywheel (63) is housed, rear axle (61) two ends are fastened by nut (64) assembly, connecting panel (27) before about two on the back vent (54), (25) respectively by regulating locating bush (24), (30) flexibly connect in centre housing (1) left and right sides, sprocket wheel (20) on output shaft (29) outer end is connected by chain (51) with flywheel (63) on the trailing wheel floral disc (52), rear shock absorber (56) is threaded by joint (68) and sleeve pipe (69), slide bar (65) is located by connecting by key (66) in sleeve pipe (69), between sleeve pipe (69) and slide bar (65), damper spring (70) is housed, joint (68) on the rear shock absorber (56) and slide bar (65) between chuck (57) on the vehicle frame (59) and the after poppet (55) on the back vent (54) respectively by screw (67), pin (85) flexibly connects

C. speed-change control device: the speed change traction box (72 left side) with spline structure is housed respectively on the hollow tube (79) of left side tap (75) and right leading (73), (72 right side), on speed change traction box (72 left side), the traction wheel (83) of band miniature gears (F) is housed in the housing (74) on (72 right side), the gear change hand lever (71 left side) of band driving gear (M), the ring gear (76) of (71 right side) and band miniature gears (D), at hollow tube (79) and gear change hand lever (71 left side), the spring housing (80) of band positioning head (H) is housed between (71 right side), have on the hollow tube (79) two intervals be about 60 degree angles and with spring housing (80) on the positioning groove of the corresponding cooperation of positioning head (H), lid (77) and ring gear (76) are respectively by screw (78), (81) positioning and fixing, speed change steel rope (82), (84) one respectively on left and right sides speed change traction box (72 left side), groove (G) internal fixation of traction wheel (83) side in (72 right side), speed change steel rope (82), (84) other end enters in the fourth gear internal speed-changing driving device (50) by bend pipe (58) hollow bulb under the vehicle frame (59) and overlaps (39) with propelling respectively, (19) pull bar on (B), (C) connect, spike (177) is flexibly connected in centre housing (1) bottom by pin (178).

2. rear wheel driver with internal 4-gear speed variation according to claim 1, it is characterized in that: the variable third gear internal speed-changing driving device that is changed to of fourth gear internal speed-changing driving device (50), long bushing (116) is housed respectively, the left cap (122) of lining (89), right cap (87) is fixed in centre housing (123) both sides by screw (86), with axis (90) two ends that gear (P) fuses bearing (92) is housed respectively, setting nut (91) and the left crank (118) and the right crank (88) that have step (49), between driving gear (121) and the axis (90) is the bearing fit of spline and spline, between the gear (P) on driving gear (121) and the axis (90) pull back spring (93) is housed, on long bushing (116), be equipped with and advance cover (119) and back and forth overlap (120), back and forth between cover (120) and the driving gear (121) steel ball (115) is housed, between long bushing (116) inwall and axis (90), torsion spring (117) is housed, the other end of torsion spring (117) is connected with advancing the pull bar (T) that overlaps on (119), on the axle (94) of passing a bridge, be equipped with and advance cover (112) and reciprocal cover (110), back and forth between cover (110) and the carrier gear (109) bearing (96) and lining (97) are being housed, and back-up ring (111) is housed in bearing (96) outer end, pass a bridge and be located by connecting by key (113) between axle (94) and the left cap (122), advance between cover (112) and the left cap (122) torsion spring (114) is housed, one end of torsion spring (114) is connected with advancing the pull bar (W) that overlaps on (112), back and forth between cover (110) and the right cap (87) pull back spring (95) is housed, output gear (103) is housed on the output shaft (107) and is located by connecting by key (98), output shaft (107) two ends respectively with regulate locating bush (102), (108) adorn bearing (106) between, connecting panel (105) before about on the back vent (54), (104) respectively by screwed adjusting locating bush (102), (108) in (123) two flexible connections of centre housing, output shaft (107) outer end is equipped with sprocket wheel (101) and is located by connecting by key (99), and screw (100) is fixing.

3. rear wheel driver with internal 4-gear speed variation according to claim 1, it is characterized in that: the variable single speed sprocket wheel that is changed to of fourth gear internal speed-changing driving device (50), chain gearing, left cap (174) and right cap (153) that lining (172) are housed are respectively fixed in centre housing (175) both sides by screw (152), drive sprocket (156) is housed on axis (155) and is located by connecting by key (173), bearing (171) is equipped with at axis (155) two ends respectively, setting nut (170) and the left and right sides crank (169) that has step (49), (154), output chain gear (168) is housed on the output shaft (165), and be located by connecting by key (158), output shaft (165) two ends respectively with regulate locating bush (166), bearing (167) is housed (159), connecting panel (164) before about on the back vent (54), (163) respectively by screwed adjusting locating bush (166), (159) flexibly connect in centre housing (175) both sides, drive sprocket (156) is connected by chain (157) with output chain gear (168), output shaft (165) outer end is equipped with sprocket wheel (162) and is located by connecting by key (160), and screw (161) is fixing.

4. rear wheel driver with internal 4-gear speed variation according to claim 1, it is characterized in that: the variable single speed gear system that is changed to of fourth gear internal speed-changing driving device (50), left cap (150) and right cap (125) that lining (126) are housed are respectively fixed in centre housing (151) both sides by screw (124), driving gear (149) is housed on axis (128) and is located by connecting by key (148), the left and right sides crank (147) that axis (128) two ends are equipped with bearing (130) and setting nut (129) respectively and are had step (49), (127), between gap bridge axle (143) and carrier gear (146), bearing (145) is housed, back-up ring (144) is equipped with in bearing (145) outer end, pass a bridge and be located by connecting by key (131) between axle (143) and the right cap (125), output gear (142) is housed on the output shaft (140), and be located by connecting by key (141), output shaft (140) two ends respectively with regulate locating bush (139), bearing (138) is housed (132), connecting panel (137) before about on the back vent (54), (136) respectively by screwed adjusting locating bush (139), (132) flexibly connect in centre housing (151) both sides, output shaft (140) outer end is equipped with sprocket wheel (135) and is located by connecting by key (133), and screw (134) is fixing.

5. according to claim 1,2 described rear wheel driver with internal 4-gear speed variation, it is characterized in that: advancing cover (39) and back and forth overlapping between (40), advancing the cover (19) and the base angle that has that back and forth two adjacent end faces have two corresponding cooperations between the cover (32) is 40 concavo-convex right-angled trapezium about spending, between cover (40) and the long bushing (41), be the bearing fit of spline and spline between cover (32) and the gap bridge axle (18) back and forth back and forth.