CN2835077Y

CN2835077Y - Bicycle transmission case

Info

Publication number: CN2835077Y
Application number: CN 200520132716
Authority: CN
Inventors: 孙锦堂
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-11
Filing date: 2005-11-11
Publication date: 2006-11-08
Anticipated expiration: 2015-11-11

Abstract

The utility model discloses a new bicycle transmission case which comprises a case body, a main shaft of a spline, an auxiliary shaft of a spline, a splined shaft of a ratchet wheel, and a speed regulation shaft, wherein annular inner teeth are arranged on the inner wall of the case body; the main shaft of a spline, the auxiliary shaft of a spline, the splined shaft of a ratchet wheel, and the speed regulation shaft are parallel arranged in the case body, wherein both ends of the main shaft of a spline extend out of the case body and are connected with pedals; shift gears are abreast arranged on the main shaft of a spline in the case body; auxiliary shift gears which respectively correspond to and are engaged with the shift gears on the main shaft of a spline, and a large transmission gear are arranged on the auxiliary shaft of a spline; a small transmission gear, a ratchet wheel and a connecting wheel are arranged on the splined shaft of a ratchet wheel, wherein the small transmission gear is engaged with the large transmission gear on the auxiliary shaft of a spline; the connecting wheel is engaged with the annular inner teeth on the inner wall of the case body; a shifting fork which can shift the shift gears and the auxiliary shift gears is arranged on the speed regulation shaft. The utility model does not need the transmission of a chain wheel and has the advantages of compact structure, cabinet volume, portability, stable performance for speed regulation, low failure rate, low noise, etc.

Description

The new bicycle change speed gear box

Technical field

The utility model relates to a kind of derailleur, a kind of more precisely change speed gear box that is installed in the cycle wheel middle part.

Background technology

At present, the employed bicycle shift of people system all is arranged on the outside of rotation shaft of wheel, realize speed change by each gear meshing in chain and the gear cluster, gear cluster is layering into tower structure by the gear of different-diameter, switching between chain and gear is controlled by backguy, though the speed change system of this structure can carry out speed change by selecting different rear driving wheel diameters for use, but be subjected to the influence of self structure, very easily take off the chain phenomenon during speed change, unstable properties, the fault rate height, the parts of speed change system collide mutually, friction also can be sent very big noise, because outside speed change system is directly exposed to, therefore very easily deposit foreign matters such as dust on the gear cluster, influence cooperates with sprocket wheel, the lubricating oil on it also be easy to make dirty user's hand and clothing, not enough health, in addition, its design has also increased the weight of vehicle body, makes that the bicycle that has speed changing function is merrily and lightheartedly easy inadequately.

The utility model content

At the deficiency that above-mentioned prior art exists, the purpose of this utility model is to provide a kind of simple and reasonable, volume small and exquisite slim and graceful and need not the new bicycle change speed gear box that chain drives.

For achieving the above object, the technical solution adopted in the utility model is: a kind of new bicycle change speed gear box, comprise casing, spline spindle, the spline countershaft, ratchet castellated shaft and speed governing axle, its cabinet wall is provided with annular internal tooth, spline spindle is set in the casing abreast, the spline countershaft, ratchet castellated shaft and speed governing axle, wherein said spline spindle two ends are stretched out casing and are connected with pedal, be provided with shift gear abreast on the spline spindle in the casing, described spline countershaft be provided with spline spindle on each shift gear corresponding one by one, secondary shift gear of ingear and big transmission gear, described ratchet castellated shaft is provided with the defeated gear of brief biography, ratchet and fifth wheel, the defeated gear of brief biography is meshed with big transmission gear on the spline countershaft, be provided with female splines in the ratchet axis hole, the side that ratchet is relative with fifth wheel is provided with engageable ratchet, both realize clutch by the side engagement, the ratchet opposite side is provided with retracing spring, fifth wheel is meshed with annular internal tooth on the cabinet wall, and the speed governing axle is provided with the shift fork that can stir shift gear and secondary shift gear.

Be respectively arranged with four advance shift gear and neutrals on described spline spindle and the spline countershaft, described speed governing axle is provided with two shift forks, four gears on the spline spindle are followed successively by first gear, second gear, three retaining gears and four retaining gears, four gears on the described spline countershaft are followed successively by secondary first gear, secondary second gear, secondary three retaining gears and secondary four retaining gears, first gear is by female splines and spline spindle engagement, three retaining gears can slide on spline spindle by female splines, its two sides are provided with and take off post, second gear and four retaining gears corresponding with it sides be provided with can with taking off post and jack of taking off post and be meshed or match, secondary second gear can slide on the spline countershaft by female splines, its two sides are provided with and take off post, secondary first gear and the corresponding with it side of secondary three retaining gears be provided with can with taking off post and jack of taking off post and be meshed or match, secondary four retaining gears and big transmission gear are fixed on the spline countershaft, two shift forks on the speed governing axle are corresponding with three retaining gears and secondary second gears respectively, the shift fork sway can make three retaining gears and secondary second gear slide to can with the position of its both sides shifting gear interlock.

Be respectively arranged with five forward position gear and a neutral on described spline spindle and the spline countershaft, described speed governing axle is provided with three corresponding shift forks.

Be respectively arranged with six advance shift gear and neutrals on described spline spindle and the spline countershaft, described speed governing axle is provided with three corresponding shift forks.

Described casing is drum shape, form by upper semi-body, lower semi-body, left end cap, right end cap four parts, described spline spindle, spline countershaft, ratchet castellated shaft and speed governing axle respectively by bearing installation between left end cap and right end cap, be provided with annular groove between upper and lower semi-body and the left and right end cap, be provided with ball in the groove, upper and lower semi-body can rotate around left and right end cap.

Described speed governing axle is provided with shift cam, and the outside face of shift cam offers groove, and shift fork is sleeved on the shift cam, be provided with the guide finger that inserts groove between the two, during cam rotation, guide finger can slide along groove in cam, drives the shift fork sway in the time of slip.

One side of described shift fork is provided with the variable block pin, and the variable block pin is embedded on the shift cam and pushes down with variable block drum baffle plate, by torsion spring with turn round the bulging stopper arms of variable block that arm forms and be pressed in the middle of two variable block pins by elastic force.

Described casing outside is provided with the gear telltale, comprise telltale inner ring and telltale outer ring, telltale inner ring and shift cam tighten together, rotate synchronously with the speed change cam, its edge is provided with an elastic force contact, corresponding with it four contacts are housed on the telltale outer ring, and the contact is fixed in the electro-insulating rubber, and outwards draw by data line the contact.

Another part that described shift cam stretches out casing is equipped with retracing spring, ratchet, ratchet rocking arm and rotating control apparatus, the centre of ratchet is porose, be connected on the shift cam through ratchet pin, the ratchet rocking arm packs into shift cam and ratchet together, the rotating control apparatus is inserted in the ratchet back from cam center, and its spring can withstand the higher authorities of ratchet or following.

Also be provided with electrical generator in the described casing, alternator shaft is meshed with fifth wheel on the ratchet castellated shaft by gear.

One side of described change speed gear box is provided with brake gear.

Described crank, pedal, spring, packing ring, collar are formed collapsible pedal jointly, be can burst at pedal and crank connecting link place, the pedal spring washer all is enclosed within on the crank, block with collar, rotate pedal and just be stuck on the crank jut, can do when 90 degree rotate the minimizing parking taking up room.

Principle of work of the present utility model is: change speed gear box is installed in the wheel middle part during use, be connected with wheel by spoke, castellated shaft runs through the change speed gear box center, spline spindle is a power input shaft, when trampling the pedal at its two ends, manpower rotates, when being provided with four on spline spindle and the spline countershaft when advancing shift gear and a neutral, and the engagement corresponding one by one of shift gear on the spline spindle with secondary shift gear on the spline countershaft, wherein three retaining gears can transmit power with second gear and four retaining gears respectively by taking off post on its left and right side under the effect of speed governing axle shift fork, same principle, secondary second gear can transmit power with secondary first gear and secondary three retaining gears respectively by taking off post on its left and right side under the effect of shift fork, adjust shift fork and can carry out gear switch, after the variable block, big transmission gear on the spline countershaft power transmission to the small transmission gear of ratchet castellated shaft, the ratchet castellated shaft is given fifth wheel power transmission by ratchet again, and fifth wheel drives the casing rotation again and finishes takeoff output.By that analogy, can obtain required gear function by the quantity that increases shift gear, secondary shift gear and shift fork, as five gear change speed gear boxs, six gear change speed gear boxs or the like.After adopting this structure; bicycle need not chain gear; just can finish speed change at wheel center; help further dwindling the weight that the vehicle body volume reduces car; the people that are more convenient for use, because therefore a whole set of variable gear can evade the defective of existing speed change system fully all by the box sealing protection; compact conformation, gearshift performance are stablized, and have advantages such as fault rate is low, noise is little.

Description of drawings

Fig. 1 is an inner structure scheme drawing of the present utility model;

Fig. 2 is the decomposition texture scheme drawing of spline spindle;

Fig. 3 is the decomposition texture scheme drawing of spline countershaft;

Fig. 4 is the decomposition texture scheme drawing of ratchet castellated shaft;

Fig. 5 is the decomposition texture scheme drawing of electrical generator and transfer wheel thereof;

Fig. 6 is the decomposition texture scheme drawing of speed governing axle, and wherein Fig. 6 (a) is the structural representation in shift cam left side, and Fig. 6 (b) is the structural representation on shift cam right side.

Specific embodiment

Is that example is described in further detail the utility model below in conjunction with accompanying drawing with the four-speed gear shift case.

Description of reference numerals:

1---upper semi-body 2---lower semi-body

3---left end cap 4---right end cap

5---annular internal tooth 6---spline spindle

7---spline countershaft 8---ratchet castellated shaft

9---speed governing axle 10---electrical generator

11---crank 12---pedal

13---first gears 14---retaining gear

15---three retaining gears 16---, four retaining gears

The secondary second gear of 17---secondary first gears 18---

The secondary four retaining gears of 19---secondary three retaining gears 20---

Brief biography is failed gear to 21---transmitting gear 22 greatly---

23---ratchet 24 on the ratchet castellated shaft---fifth wheel

25---retracing spring 26---motor transfer wheel

27---shift cam 28---spline spindle shift fork

29---spline countershaft shift fork 30---variable block pin

31---variable block drum baffle plate 32---torsion spring

33---turning round arm 34---telltale inner ring

35---telltale outer ring 36---reduction torsion spring

37---ratchet 38---ratchet rocking arm

39---rotating control apparatus 40---brake gear

Speed changing box for bicycle as shown in Figure 1, internal speed-changing case just, this change speed gear box is installed in wheel axis place, be connected with wheel by the rung bar, casing is by upper semi-body 1, lower semi-body 2, left end cap 3, right end cap 4 is formed, upper semi-body 1 and lower semi-body 2 can be enclosed barrel-shaped, left end cap 3 and right end cap 4 are rounded, on, a lower semi-body and a left side, be provided with annular groove between the right end cap, be provided with ball in the groove, casing self is just as a big bearing, on, lower semi-body can be around a left side, right end cap rotates, a left side, the right end cap outside is provided with the supporting construction that is used for fixing on vehicle frame symmetrically, on, the inwall of lower semi-body is provided with annular internal tooth 5, six bearings are installed on the left end cap 3, five bearings are housed on the right end cap 4, spline spindle 6, spline countershaft 7, ratchet castellated shaft 8, speed governing axle 9 and electrical generator 10 respectively by bearing installation between left end cap 3 and right end cap 4, spline spindle 6 is positioned at the casing center, a left side is run through at its two ends, right end cap is connected with pedal 12 by crank 11 respectively, crank 11 is a foldable section with the junction of pedal 12, pedal 12 can be received around crankshaft rotation 90 degree sides, pedal is stuck on the crank shared space when parking by the spring washer collar with minimizing.

As Fig. 1, shown in Figure 2, spline spindle 6 is main dynamical axis and variable shafts, be set with first gear 13 on it, second gear 14, three retaining gears 15 and four retaining gears 16, be provided with packing ring and jump ring between the shift gear, first gear 13 is by female splines and spline spindle 6 engagements, second gear 14 does not have female splines, will by on the side take off post and the taking off post engagement of three retainings on the gears 15 can receive the power of spline spindle, three retaining gears 15 can slide on axle by female splines, sway by shift fork is given second gear 14 and four retaining gears 16 power transmission, four retaining gears 16 do not have female splines, need taking off post on the three retaining gears 15 to insert the power that its lateral aperture just can receive spline spindle.

As Fig. 1, Fig. 2, shown in Figure 3, secondary first gear 17 is housed on the spline countershaft 7 successively, secondary second gear 18, secondary three retaining gears 19, secondary four retaining gears 20 and big transmission gear 21, each secondary shift gear is corresponding one by one with shift gear on the spline spindle 6, engagement, be provided with packing ring and jump ring between the secondary shift gear, secondary first gear 17 does not have female splines, needing taking off post on secondary second gear 18 sides to insert could be the power transmission that transmits to spline countershaft 7 in its lateral aperture, secondary second gear 18 can slide on axle by female splines, both sides can be meshed with secondary first gear 17 and secondary three retaining gears 19, when on secondary second gear 18 sides take off post with secondary three retaining gears 19 sides on taking off post when being meshed, spline countershaft 7 just can receive the power that spline spindle 6 transmits.When taking off post on three retaining gears, 15 sides inserted the lateral aperture of four retaining gears 16, secondary four retaining gears just can receive the power that spline spindle 6 transmits, and the power that secondary one, two, three, four retaining gears receive all focuses on the big transmission gear 21 of spline countershaft one end.

As Fig. 1, Fig. 2, shown in Figure 4, ratchet castellated shaft 8 is provided with the defeated gear 22 of brief biography, ratchet 23 and fifth wheel 24, the defeated gear 22 of brief biography is meshed with big transmission gear 21 on the spline countershaft 7, be provided with female splines in the axis hole of ratchet 23, ratchet 23 and fifth wheel 24 relative sides are provided with engageable ratchet, both realize clutch by the side engagement, ratchet 23 opposite sides are provided with retracing spring 25, fifth wheel 24 is with last, annular internal tooth on the lower semi-body inwall is meshed, also be meshed (as shown in Figure 6) simultaneously with electrical generator transfer wheel 26, motor transfer wheel 26 is given electrical generator 10 power transmission, and the electricity that sends can be used for electromagnetism rocking arm control speed change or gives the small electric apparatus of carrying charging.

As Fig. 1, Fig. 2, shown in Figure 6, shift cam 27 both sides are longer, all stretch out outside the casing, shift cam surface between the end cap of the left and right sides is provided with groove, spline spindle shift fork 28 and spline countershaft shift fork 29 just are sleeved on the groove skin of cam 27, insert guide finger 29 then, with the guide finger locker guide finger is pinned, prevent that it from coming off, when cam rotation, guide finger 29 will slide along groove in cam, will drive shift fork 28 when sliding, 29 sway, shift fork sway will drive shift gear and slide, and realize the switching of gear, groove on the cam face can take shift fork on the gear to exactly according to the Position Design of one to four retaining.Right half part as shown in Figure 6, one side of shift fork is provided with variable block pin 30, variable block pin 30 is embedded on the shift cam and with variable block drum baffle plate 31 and pushes down, prevent the landing of variable block pin, by torsion spring 32 with turn round the bulging stopper arms of variable block that arm 33 forms and be pressed in the middle of two variable block pins by elastic force, when change speed gear box when a gear is transformed into another gear, the combination of variable block drum stopper arms is played the accurately effect of location of gear, prevent shift cam 27 rotational variations, the gear telltale is installed in the casing outside, comprise telltale inner ring 34 and telltale outer ring 35, telltale inner ring 34 and shift cam 27 tighten together, rotate synchronously with the speed change cam, its edge is provided with an elastic force contact, corresponding with it four contacts are housed on the telltale outer ring, the contact is fixed in the electro-insulating rubber, all there is a data lines each contact, these data lines can directly be linked on the handlebar, when the telltale inner ring rotates, the elastic force contact will contact with the contact of outer ring, contact has just realized the connection of power supply, and each contact different gear of representative of outer ring just may be displayed on the handlebar.Left-half as shown in Figure 6, stretch out outside the casing on the left side of shift cam 27, sponson is equipped with reduction torsion spring 36, ratchet 37, ratchet rocking arm 38 and rotating control apparatus 39, the centre of ratchet 37 is porose, with ratchet pin ratchet is connected on the shift cam 27, ratchet rocking arm 38 packs into the end and the ratchet 37 of shift cam 27 together, rotating control apparatus 39 inserts the back in the ratchet back from cam center, its spring can withstand the higher authorities of ratchet 37 or following, when the higher authorities of ratchet 37 are withstood by the spring of rotating control apparatus 39, ratchet 37 the higher authorities' gears just and the rocking arm ratchet engaged, shift cam 27 just is in the clickwise state, ratchet rocking arm 38 clockwise rotates just can drive shift cam 27 rotations, reduction torsion spring 36 resets for each the rotation, thereby realize gearshift, counter-rotation rotating control apparatus 39 just is in the left-hand revolution state when following is withstood by rotating control apparatus spring when ratchet.Can adopt calutron also can adopt anchoring to the control of rocking arm, when adopting calutron, be its power supply by the electrical generator in the change speed gear box, and its function unit is directly installed on the handlebar place when adopting anchoring, so that operation.

The utility model is not limited to above-mentioned preferred forms, anyone can draw other various forms of products under enlightenment of the present invention, for example obtain more gear function (five retainings, six retainings or the like) by the quantity that increases shift gear, secondary shift gear and shift fork; Perhaps set up brake gear 40 in a side of change speed gear box; Perhaps on vehicle frame, install storage battery and electrical motor additional, power transmission is used for Electrical Bicycle to spline spindle by chain.Though but on its shape or structure, do any variation, every have identical with a application or akin technical scheme, all drops within the protection domain of the present utility model.

Claims

1, a kind of new bicycle change speed gear box, it is characterized in that, comprise casing, spline spindle, the spline countershaft, ratchet castellated shaft and speed governing axle, its cabinet wall is provided with annular internal tooth, spline spindle is set in the casing abreast, the spline countershaft, ratchet castellated shaft and speed governing axle, wherein said spline spindle two ends are stretched out casing and are connected with pedal, be provided with shift gear abreast on the spline spindle in the casing, described spline countershaft be provided with spline spindle on each shift gear corresponding one by one, secondary shift gear of ingear and big transmission gear, described ratchet castellated shaft is provided with the defeated gear of brief biography, ratchet and fifth wheel, the defeated gear of brief biography is meshed with big transmission gear on the spline countershaft, be provided with female splines in the ratchet axis hole, the side that ratchet is relative with fifth wheel is provided with engageable ratchet, both realize clutch by the side engagement, the ratchet opposite side is provided with retracing spring, fifth wheel is meshed with annular internal tooth on the cabinet wall, and the speed governing axle is provided with the shift fork that can stir shift gear and secondary shift gear.

2, new bicycle change speed gear box according to claim 1, it is characterized in that, be respectively arranged with four advance shift gear and neutrals on described spline spindle and the spline countershaft, described speed governing axle is provided with two shift forks, four gears on the spline spindle are followed successively by first gear, second gear, three retaining gears and four retaining gears, four gears on the described spline countershaft are followed successively by secondary first gear, secondary second gear, secondary three retaining gears and secondary four retaining gears, first gear is by female splines and spline spindle engagement, three retaining gears can slide on spline spindle by female splines, its two sides are provided with and take off post, second gear and four retaining gears corresponding with it sides be provided with can with taking off post and jack of taking off post and be meshed or match, secondary second gear can slide on the spline countershaft by female splines, its two sides are provided with and take off post, secondary first gear and the corresponding with it side of secondary three retaining gears be provided with can with taking off post and jack of taking off post and be meshed or match, secondary four retaining gears and big transmission gear are fixed on the spline countershaft, two shift forks on the speed governing axle are corresponding with three retaining gears and secondary second gears respectively, the shift fork sway can make three retaining gears and secondary second gear slide to can with the position of its both sides shifting gear interlock.

3, new bicycle change speed gear box according to claim 1 is characterized in that, is respectively arranged with five forward position gear and a neutral on described spline spindle and the spline countershaft, and described speed governing axle is provided with three corresponding shift forks.

4, new bicycle change speed gear box according to claim 1 is characterized in that, is respectively arranged with six advance shift gear and neutrals on described spline spindle and the spline countershaft, and described speed governing axle is provided with three corresponding shift forks.

5, new bicycle change speed gear box according to claim 1, it is characterized in that, described casing is drum shape, form by upper semi-body, lower semi-body, left end cap, right end cap four parts, described spline spindle, spline countershaft, ratchet castellated shaft and speed governing axle respectively by bearing installation between left end cap and right end cap, be provided with annular groove between upper and lower semi-body and the left and right end cap, be provided with ball in the groove, upper and lower semi-body can rotate around left and right end cap.

6, new bicycle change speed gear box according to claim 1, it is characterized in that, described speed governing axle is provided with shift cam, the outside face of shift cam offers groove, shift fork is sleeved on the shift cam, is provided with the guide finger that inserts groove between the two, during cam rotation, guide finger can slide along groove in cam, drives the shift fork sway in the time of slip.

7, according to the arbitrary described new bicycle change speed gear box of claim 1 to 6, it is characterized in that, one side of described shift fork is provided with the variable block pin, and the variable block pin is embedded on the shift cam and pushes down with variable block drum baffle plate, by torsion spring with turn round the bulging stopper arms of variable block that arm forms and be pressed in the middle of two variable block pins by elastic force.

8, new bicycle change speed gear box according to claim 7, it is characterized in that, described casing outside is provided with the gear telltale, comprise telltale inner ring and telltale outer ring, telltale inner ring and shift cam tighten together, and rotate synchronously with the speed change cam, its edge is provided with an elastic force contact, corresponding with it four contacts are housed on the telltale outer ring, and the contact is fixed in the electro-insulating rubber, and outwards draw by data line the contact.

9, new bicycle change speed gear box according to claim 8, it is characterized in that, another part that described shift cam stretches out casing is equipped with retracing spring, ratchet, ratchet rocking arm and rotating control apparatus, the centre of ratchet is porose, be connected on the shift cam through ratchet pin, the ratchet rocking arm packs into shift cam and ratchet together, and the rotating control apparatus is inserted in the ratchet back from cam center, and its spring can withstand the higher authorities of ratchet or following.

10, new bicycle change speed gear box according to claim 9, it is characterized in that, also be provided with electrical generator in the described casing, alternator shaft is meshed with fifth wheel on the ratchet castellated shaft by gear, one side of change speed gear box is provided with brake gear, the pedal at spline spindle two ends is the folding pedal, form jointly by crank, pedal, spring, packing ring, collar, the junction of pedal and crank is folding position, the pedal spring washer all is enclosed within on the crank, block with collar, rotate pedal and just be stuck on the crank jut.