CN2855890Y

CN2855890Y - Pedal reverse rotating speed variator of bicycle

Info

Publication number: CN2855890Y
Application number: CN 200520076652
Authority: CN
Inventors: 罗明端
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-21
Filing date: 2005-10-21
Publication date: 2007-01-10
Anticipated expiration: 2015-10-21

Abstract

The utility model relates to a counter-clockwise spin gear shift of a motorcycle, in particular to a device of gear shift in a mode of treadle counter-clockwise spin, comprising a drive chain wheel (4) of the motorcycle and a chain wheel medial axis (1) which is a three-step solid axle and its middle section is a splined shaft (P); the wheel medial axis (1) is installed with an coaxial slow speed gear wheel (7), a rapid gear wheel (9), the slow speed gear wheel and the rapid gear wheel (7,9)mesh with a driven gear. Gear shift can be realized by reversely rotating the with a degree of 45 degree to generate gear shift thrust so as to make the slow speed and rapid gear wheel (7, 9)be engaged with or disengaged with the driven gear.. Treading gear shift has the advantages of simple gear shift operation, large speed ratio of shift gear suitable for gear shift from slow speed to rapid speed (Bicycle motocross) or gear shift from rapid speed to slow speed (six-wheel car), overcoming the defect of small speed ratio of the shift gear of the existing product and easiness in losing chain when shifting gear to change the chains.

Description

The contrary change-speed box that revolves of a kind of bicycle pedals

Technical field

The utility model relates to a kind of derailleur, definite a kind of foot-operated device that carries out speed change against the mode of revolving that uses of saying so.

Background technology

Existing bicycle speed-varying unit great majority are with chain gear, change by the diameter of adjusting drive sprocket (axis) and driven sprocket (flywheel), reach the purpose that changes transmission speed ratio.This chain-driving change-speed box has following defective: the speed change speed ratio can not change excessive, though the transmission system that has is ten multi-change speed gears nearly, but must pass through multi-chain gear wheel (flywheel) excessively could realize speed change step by step from Fast transforms to the most at a slow speed, it is little that speed change is each time switched speed ratio; Chain, sprocket wheel frequently switch in speed-change process, occur the fault that chain breaks away from sprocket wheel easily; Particularly when going up a slope, chain switches and does not hang up properly wheel and lose propulsive effort, causes stall to founder easily in the speed-change process; It is M/C that speed change is switched, and needs to install annexes such as speed-change cable, and it is convenient inadequately to manipulate.

The utility model content

The utility model is for improving existing derailleur structure, overcome the technological deficiency of existence, a kind of chain transmission mode and sprocket shaft distance that does not change existing bicycle is provided, do not need annexes such as transposition of chain sprocket speed change and installation speed change manipulating pulling cable, the speed change speed ratio is big, speed change is switched fast, simple installation, the contrary change-speed box that revolves of a kind of bicycle pedals of processing ease.

Technical solution of the present utility model is: the contrary change-speed box that revolves of described a kind of bicycle pedals, the driving chain sprocket wheel and the sprocket wheel axis that comprise bicycle, the driven gear of coaxial conjuncted structure is equipped with in described sprocket wheel axis below, driven gear is provided with coaxial step gear, the flank of tooth fixed engagement (constant-mesh) of its flank of tooth one end and low-gear, the other end is with quick gear sliding engaged or separate (not meshing).

Described sprocket wheel axis is three sections step solid axles, and the stage casing of its external diameter maximum is a castellated shaft, and the sprocket wheel axis is coaxially installed with soon, parts such as two groups of gears and rolling wheel support and speed change spring, the spring of stepping down at a slow speed; Described low-gear internal diameter is connected with the sprocket wheel axis with ball, its left side captive joint flange, flange captive joint sprocket wheel; Described quick gear internal diameter is a splined hole, match with the castellated shaft in sprocket wheel axis stage casing, and can be on the sprocket wheel axis left and right displacement, rotate synchronously with castellated shaft, have in the quick left side of gear and low-gear modulus, internally toothed annulus that pitch circle is identical, have the ring-type convex-concave of axial symmetry domatic in the right side of gear fast; The described ball support axially two ends of symmetry is equipped with roller, and at the one end ratchet is installed and acts on ratchet gear ring on the case of transmission, constitutes the contrary stop motion mechanism that revolves; Described speed change spring, the spring of stepping down all are set in the sprocket wheel axis, the speed change spring is positioned at soon, between the low-gear, the left end of speed change spring is fixed in the left end radial groove place of castellated shaft, right-hand member joins with quick gear left side, the left end of spring of stepping down joins with the back-up ring that is installed on the castellated shaft right-hand member, and right-hand member and right inner ring join.

Principle of work and speed-change process that the foot-operated mode of use described in the utility model is carried out speed change are, bicycle is when normally riding, foot-operated rotating band movable sprocket axis, splined shaft section on the sprocket wheel axis inserts quick gear (internal splined hole), gear and sprocket wheel axis rotate in the same way synchronously and drive and the driven gear rotation of gear mesh fast fast, coaxial another flank of tooth of conjuncted driven gear and low-gear engagement (constant-mesh type of drive), the rotation of drive low-gear, low-gear drives the flange that is fixed on gear one end, flange is connected with sprocket wheel and rotation in the same way synchronously, drives the rotation of driving chain drive rear wheels.Because fast the external diameter of gear greater than with its ingear driven gear, another flank of tooth external diameter of driven gear is greater than (or equaling) and its ingear low-gear, so revolving with quick gear, the sprocket wheel axis turns around, the transmission speed ratio that is delivered to low-gear and sprocket wheel by driven gear is greater than a circle (promptly foot-operated revolving turned around, and the sprocket wheel rotation is greater than a circle).When the needs speed change, step on foot-operated contrary about 1/4 circle of sprocket wheel axis that revolves, be installed in contrary in the same way synchronously the revolving of quick gear of sprocket wheel axis splined shaft section, the right side of gear has the ring-type of axial symmetry domatic fast, ring-type is domatic joins with the roller that is installed on the rolling wheel support on the sprocket wheel axis, a rolling wheel support radially end is equipped with ratchet, ratchet acts on mutually with ratchet on the case of transmission and produces the contrary stop of revolving, cause rolling wheel support not revolve in company with the sprocket wheel axis is contrary synchronously, the roller of being installed on the rolling wheel support has axially produced the about 1/4 angle of rotation displacement of enclosing in the domatic joint of ring-type of symmetry with the right side of quick gear, roller is the axial domatic protuberance (high point) of ring-type on domatic that be moved to of the ring-type of symmetry along quick gear right side, roller is in the process that is moved to the domatic upper convex portion of ring-type (high point), quick gear ejection displacement is left separated with the engagement of driven gear, the external tooth of the left end internally toothed annulus of gear and low-gear meshes the (module of gear of low-gear external tooth and quick gear left end internally toothed annulus fast, pitch circle equates, be coaxial after the engagement) with portion's rotation, transmission speed ratio is 1: 1 (promptly foot-operated revolving turned around, and sprocket wheel revolves and turns around).Gear compresses speed change spring (energy storage) between two gears simultaneously in left translation and low-gear engagement process fast.Speed change more if desired, step on foot-operated contrary about 1/4 circle of sprocket wheel axis that revolves once more, gear is contrary once more fast revolves, withstand the roller on the domatic protuberance of axial symmetrical ring-type (high point) of quick gear right side, produced the angle of rotation displacement of about 1/4 circle once more with rolling wheel support and sprocket wheel axis, roller and support are moved to the recess of the axial symmetrical ring-type in quick gear right side on domatic, roller no longer withstands the right side of quick gear, gear is subjected to the passing of compressed speed change acting force of the spring fast, produce displacement to the right and separate, with driven gear right-hand member flank of tooth engaged transmission with the engagement of low-gear.As stepping on foot-operated contrary about 1/4 circle of sprocket wheel axis that revolves again, then be fast more than the repetition → slow → fast → slow speed-change process of circulation repeatedly.

The utility model accompanying drawing is the foot operated speed changer structural representation that can be applicable to large and small wheel bicycle.As be applied to big wheel bicycle, and answer the adapted minor sprocket, axis revolves and turns around when normally riding on flat road, and the rotation of drive sprocket is greater than a circle (fast), and transmission speed ratio (riding the ratio of arm and sprocket wheel rotating cycle) is 1: 1.5-2.5; Become at a slow speed when load-carrying and upward slope, transmission speed ratio is 1: 1, because be the adapted minor sprocket, so the effect that strengthens rotary torsion is arranged.As be applied to small-wheel bicycle, and answer adapted hinge wheel (conventional sprocket wheel), transmission speed ratio is 1: 1 at a slow speed, transmission speed ratio is 1 fast: 1.5-2.5.As further improvement of the utility model, the direction of speed speed change can be adjusted, and only needs outside dimension with the fast gear at a slow speed of technical solutions of the utility model to exchange and oppositely install driven gear and gets final product.According to above technical scheme, structurally change slightly, can also realize fast, in, slow three fast speed changes.

The beneficial effects of the utility model are: the 1. contrary speed change of revolving of foot control operation, and not only fast and convenient but also drag-line that saved the hand gear operation is controlled annex; 2. during speed change by gear mesh or separate mode transmission, do not need to carry out chain and switch, can not produce the fault that speed change is fallen chain; 3. the speed change speed ratio is big, can settle at one go to carry out switching to the speed change of dead slow the most at a high speed; 4. speed change is quick, utilizes spring thrust moment to finish gear mesh, the speed-changing chain long wheel disappearance propulsive effort that causes switching time can not occur; 5. simple installation does not change the chain-driving mode and the installation shaft distance of ordinary bicycle, only changes the middle axle construction of ordinary bicycle; 6. speed change exchange and supporting comformability are strong, both can be applied to big wheel bicycle, can be applied to small-wheel bicycle again, also are applicable to manual tricycle or Electrical Bicycle etc.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is a scheme of installation of the present utility model;

Fig. 2 is an overall structure scheme drawing of the present utility model;

Gear axial displacement and mesh schematic representation when Fig. 3 is the utility model speed change;

Gear was to the left dislocation engagement rolling wheel support scheme drawing of stepping down not when Fig. 4 was the utility model speed change;

Not engagement and roller view of gear displacement to the right when Fig. 5 is the utility model speed change;

Fig. 6 is roller and rolling wheel support, ratchet, ratchet structure scheme drawing;

Fig. 7 is the domatic convex-concave bilge construction of a quick gear right side ring-type scheme drawing;

Fig. 8 is low-gear and flange connection structural representation;

Fig. 9 is a sprocket wheel axis structural representation.

The parts name of mark digital number is (referring to an accompanying drawing 2) among the figure: (1) sprocket wheel axis, (2) left inner ring, (3) flange (4) sprocket wheel, (5) outer ring, the left and right sides, (6) ball, (7) low-gear, (8) speed change spring, (9) quick gear, (10) roller, (11) roller bearing pin, (12) rolling wheel support, (13) ratchet, (14) ratchet bearing pin, (15) case of transmission, (16) right inner ring, (17) stop pin, (18) spring of stepping down, (19) the spring back-up ring of stepping down, (20) driven gear inner ring, (21) driven gear, (22) driven gear bearing pin.

The specific embodiment

Referring to accompanying drawing 2, sprocket wheel axis 1 is coaxially installed with low-gear 7 quick gears 9 and rolling wheel support 12 and speed change spring 8, the spring 18 of stepping down, the spring back-up ring 19 of stepping down, left and right sides inner ring 2 and 16 etc.; Low-gear 7 right-hand member endoporus have ball 6 and sprocket wheel axis 1 to join, the left end endoporus has ball 6 and left inner ring 2 to join, left side inner ring 2 is fixed on the left end of sprocket wheel axis 1 with screw thread edge cover, low-gear 7 left end external diameters edge cover is fixed with flange 3 (referring to accompanying drawing 8, M is that groove edge cover is fixing for high spot N), flange 3 left ends install and fix sprocket wheel 4, and flange 3 right-hand members join with ball 6 and outer ring, the left and right sides 5, and outer ring, the left and right sides 5 edge covers are fixed on the two ends of case of transmission 15; Sprocket wheel axis 1 stage casing is a castellated shaft, gear 9 edges are enclosed within splined shaft section fast, there is internally toothed annulus (using with the low-gear engagement) gear 9 left sides fast, because the quick gear 9 of spline effect can move axially in spline and rotate synchronously with sprocket wheel axis 1, gear 9 right sides have the ring-type of axial symmetry domatic (referring to accompanying drawing 7 fast, J is the high point of the domatic protuberance symmetry of ring-type, and K is the domatic recess symmetry of a ring-type low spot, and L is an internal splined hole); Sprocket wheel axis 1 splined shaft section between low-gear 7 and quick gear 9, be inlaid with speed change spring 8, speed change spring 8 left ends are stuck in locatees stop (referring to accompanying drawing 9 in the splined shaft section left end radial groove, O is the left end groove, P is a splined shaft section), right-hand member is pressed in the left side internally toothed annulus of quick gear 9, with quick gear 9 push to the right be close to roller 10 till; Right-hand member at sprocket wheel axis 1 splined shaft section, be inlaid with the spring back-up ring 19 of stepping down, the step down left end of spring back-up ring 19, be inlaid with rolling wheel support 12, rolling wheel support 12 can be around 1 rotation of sprocket wheel axis, the left side, rolling wheel support 12 two ends is equipped with roller 10, roller 10 by roller bearing pin 11 fixing the and rotatable ring-type that is adjacent to quick gear 9 right-hand members domatic (referring to accompanying drawing 6, I is the stop ratchet), the right of rolling wheel support 12 is equipped with ratchet bearing pin 14 with fixed pawl 13, the ratchet ring of crown partial action on case of transmission 15 of ratchet 13, if the sprocket wheel axis 1 contrary speed change of revolving, ratchet 13 sticks into ratchet and stop (can not contrary revolve); At the right-hand member of spring back-up ring 19 of stepping down, be inlaid with the spring 18 of stepping down, spring 18 is compressed in steps down between spring back-up ring 19 and the right inner ring 16, its length of spring compressed power is greater than the compressive force of speed change spring 8, be threaded sprocket wheel axis 1 and be fixed on the right-hand member of sprocket wheel axis 1 by stop pin 17 of right inner ring 16, its external diameter joins with ball 6 and outer ring, the left and right sides 5, and outer ring, the left and right sides 5 edge covers are fixed on the two ends of case of transmission 15; The below of low-gear 7 quick gears 9 is equipped with driven gear 21, driven gear 21 is coaxial conjuncted step gears, its left end and low-gear 7 mesh in the constant-mesh mode, its right-hand member separates with 9 engagements of quick gear or speed change and does not mesh, driven gear 21 joins with ball 6 and driven gear inner ring 20, driven gear inner ring 20 is fixed on driven gear bearing pin 22 two ends, and driven gear bearing pin 22 is fixed in the mounting hole at two ends, case of transmission 15 below.

The foot-operated contrary working process that revolves change-speed box is, rotating sprocket axis 1, the spline of sprocket wheel axis 1 is passed to quick gear 9 with rotational force, quick gear 9 and driven gear 21 right-hand member gears mesh, the external diameter of gear 9 is greater than the external diameter of driven gear 21 fast, driven gear 21 obtains to improve rotating speed and by the left end gear rotational force is passed to low-gear 7, and low-gear 7 drives flange 3 and sprocket wheel 4 rotations and obtains to improve rotating speed (speed change fast state).Speed change is stepped on and is ridden sprocket wheel axis 1 against revolving about 1/4 circle if desired, gear 9 is thereupon against revolving about 1/4 circle fast, but rolling wheel support 12 stop (can not contrary revolve) because ratchet 13 acts on ratchet on the case of transmission 15, the roller 10 that the axially symmetrical domatic fovea superior of ring-type place, quick gear 9 right sides is close to, quick gear 9 contrary revolving in about 1/4 process of enclosing along the domatic high spot that is displaced to of ring-type, the roller of being close on ring-type is domatic 10 with quick gear 9 to left translation, convex-concave place difference of height on ring-type is domatic is exactly quick gear 9 axially movable distances, gear 9 separates to left dislocation with the transmission engagement of driven gear 21 fast, in compression speed change spring 8 energy storage in left dislocation, the internally toothed annulus of its left side inserted the outer flank of tooth (the internally toothed annulus module of gear of low-gear 7 and quick gear 9 of low-gear 7 after displacement put in place, pitch circle is identical), low-gear 7 and quick gear 9 are in insert engagement (or claiming to combine), the spline of sprocket wheel axis 1 is passed to quick gear 9 with rotational force, gear 9 is passed to low-gear 7 (rotation synchronously) fast, low-gear 7 is passed to flange 3 and sprocket wheel 4 with rotational force, transmission speed ratio be 1: 1 speed change at a slow speed state (referring to accompanying drawing 3, A is an external tooth engagement in two gears, B is that support and roller withstand quick gear and move to left, and C is compressed energy storage for the speed change spring).More than be exactly fast to the overall process of speed change at a slow speed, at shelves at a slow speed again to quick shelves speed change, repeat to step on and ride sprocket wheel axis 1 against revolving about 1/4 circle, the roller 10 that protruding place on the ring-type of the axial symmetry in quick gear 9 right sides is domatic is close to, quick gear 9 contrary revolving in about 1/4 process of enclosing along the domatic recess that is displaced to of ring-type, the roller of being close on ring-type is domatic 10 loses the effect of the quick gear 9 of ejection at recess, the speed change spring 8 that quick gear 9 is compressed energy storage is passed to right-hand member and driven gear engagement, finishes at a slow speed to quick speed-change process.

Foot operated speed changer is in speed-change process, variable speed operation is against revolving foot-operated produce thus gear mesh or separation, all be in the flashy time, to finish, two situations that the mating teeth end face is inconsistent will inevitably appear in the process of gear mesh, foot operated speed changer is provided with fast when speed change meshes at a slow speed for this reason, as the inconsistent situation of increment face appears (referring to accompanying drawing 4, D is speed change moment inside and outside increment face not engagement that offsets, E is gear right-hand member protuberance and the rolling wheel support compression spring of giving up the throne that moves to right), rolling wheel support 12 can be given up the throne to the right automatically, when quick gear 9 left sides and low-gear 7 right sides occurring when inconsistent, high spot ejection on roller 10 and the quick gear 9 right side ring-types of rolling wheel support 12 quilts are domatic moves to right, the rolling wheel support 12 ejections spring back-up ring 19 of stepping down, the spring back-up ring of stepping down pushes the spring 18 of stepping down, because at the speed-change process middle gear is still to be in slew mode, the inconsistent situation of increment face can finish in a flash and mesh tooth face misplace mutually (can mesh) occur, parts such as quick gear 9 and rolling wheel support 12, stepped down the spring back-up ring 19 and spring 18 ejections of stepping down to meshing reset mode (compression energy of the spring 18 of stepping down discharges the compressive force greater than speed change spring 8), thereby can be avoided damaging parts.At a slow speed when quick speed change meshes, as the inconsistent situation of quick gear 9 and driven gear 21 increment faces appears (referring to accompanying drawing 5, F is the gear face not engagement that offsets, G is the pushing gear engagement to the right of speed change spring, H is the quick gear stroke distances that moves to right), fast gear 9 is under the pressure of speed change spring 8, can (can mesh) finish engagement at once when mesh tooth face occurring in a flash and misplace mutually.Above technical design scheme has been guaranteed the reliability that foot operated speed changer carries out the work of variable speed operation parts in all cases, can finish the variable gear engagement automatically, fast, smoothly.

Claims

1, the contrary change-speed box that revolves of a kind of bicycle pedals, the driving chain sprocket wheel (4) and the sprocket wheel axis (1) that comprise bicycle, sprocket wheel axis (1) is coaxially installed with low-gear (7), quick gear (9), speed change spring (8) and the spring of stepping down (18), the driven gear (21) of coaxial conjuncted stair structure is equipped with in sprocket wheel axis (1) below, its left end flank of tooth and low-gear (7) engagement, its right-hand member flank of tooth is with gear (9) engagement or speed change are separated fast, it is characterized in that: described sprocket wheel axis (1) is three sections step solid axles, and its stage casing is castellated shaft (P); Described low-gear (7), its right side are concave structure, its left end cylindrical edge cover flange (3), and flange (3) is equipped with sprocket wheel (4); The endoporus of described quick gear (9) is splined hole (L), and fast there is internally toothed annulus gear (9) left side, and the modulus of internally toothed annulus, pitch circle are identical with low-gear (7); The ring-type that its right side has axial symmetrical convex-concave to replace is domatic, and there is plain recess (J) on domatic protuberance top; Described rolling wheel support (12), its two ends are symmetrically installed with roller (10), it is domatic or keep somewhere the convex-concave portion (J, K) of ring-type on domatic that withstand on that roller (10) pushes quick gear (9) right-hand member ring-type, the one end is equipped with ratchet (13), ratchet (13) acts on the ratchet on the case of transmission (15), produces the contrary stopping effect that revolves; Described speed change spring (8) is positioned between low-gear (7), the quick gear (9), castellated shaft (P) the left end radial groove (O) that its left end is fixed in sprocket wheel axis (1) is located, right-hand member joins with quick gear (9) left side, the left end of spring (18) of stepping down joins with the spring back-up ring (19) of stepping down, and right-hand member and right inner ring (16) join.

2. a kind of bicycle pedals according to claim 1 is contrary to revolve change-speed box, it is characterized in that flange (3) and low-gear (7) edge cover fixedly take convex-concave to peg graft and the screw threads for fastening mode is fixed.

3. the contrary change-speed box that revolves of a kind of bicycle pedals according to claim 1 and 2, it is characterized in that case of transmission (15) adopts and the installation that connects to ground of vehicle frame assembly welding or fastener fixed form, case of transmission (15) two ends, the left and right sides are equipped with outer ring, the left and right sides (5), and outer ring, the left and right sides (5) connect sprocket wheel axis (1) and appended parts in the ball mode of joining.