CN1932336A

CN1932336A - Quill gear speed changer

Info

Publication number: CN1932336A
Application number: CN 200510102974
Authority: CN
Inventors: 张明亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-16
Filing date: 2005-09-16
Publication date: 2007-03-21

Abstract

The present invention relates to a cover gear speed changer. It has two groups of cover gears, every group of cover gears is formed from several cover gears with different diameters, the small cover gear is covered by large cover gear, every cover gear can be transversely moved. Said invention utilizes the change of mesh of different cover gears in two groups of cover gears so as to attain the goal of changing speed.

Description

Housing gear speed variator

Technical field the present invention relates to a kind of mechanical variable speed device, especially by two groups of sleeve gears, every group of sleeve gear by the different some sleeve gears of diameter form, the sleeve gear of the big one-level of diameter entangles the sleeve gear of the little one-level of diameter, these sleeve gears can laterally move.

Background technique is present, and known mechanical transmission kind is many, mainly contains following a few class:

1, ordinary gear speed changer is to come transferring power with gear meshing, and two or more Gear combination are arranged, when a Gear combination is transformed to another Gear combination, and just can speed change.As widely used gear-shift transmission on automobile.

2, chain type turriform speed changer, with the chain transferring power, input shaft and (or) sprocket wheel that has two or more radiuses not wait on the output shaft, when chain conversion sprocket wheel, just can speed change, as the chain type turriform speed changer that on multi-speed bicycle, mountain bike, generally uses.

3, chain type buncher is to utilize sprocket wheel (normally using conical disc) and steel to come transferring power around the property chain as transmission component, carries out electrodeless variable-speed by the radius of clean-up that changes the contacting point.As slide plate chain buncher, roller chain buncher, chain type coiling buncher or the like.

4, friction type buncher is that frictional force or the lubricant film tractive force that utilizes active, driven rigid member (or passing through intermediary element) to produce in the contacting point carries out transmission, and can carries out electrodeless variable-speed by the radius of clean-up that changes the contacting point.As cone disc annular disc type buncher, multi-disc type buncher, change direct-acting type buncher, steel ball bevel-type buncher, pyramid type buncher, planetary conical disc type buncher, planet circular cone type buncher or the like.

5, belt buncher, be with initiatively, driven cone pulley and the driving belt that tightly is enclosed within above them form, by change driving belt with initiatively, driven cone pulley position contacting carries out electrodeless variable-speed.As classical V-belt buncher, wide V band buncher, metal tape buncher etc.

6, pulsed buncher is to use the connecting rod transferring power, changes the amplitude of rocking bar reciprocally swinging by the length that changes crank, and its output speed is pulsed.Commonly used have three-phase side-by-side connecting rod formula pulsation buncher, four a phase side-by-side connecting rod formulas pulsation buncher.

The existing relevant patent retrieval situation of speed changer: retrieve in Patent Office of the People's Republic of China, issue the existing relevant patent application of 3200 remainders at " speed changer " item, in them, " speed changer " and the present invention of application number 02117150.5 has similar or similar part, and other patents do not have similar or similar application to the present invention.

Existing gear-shift transmission, transmission is stable, gear ratio is big, the output torque is big, but big, the bulky weakness of weight is arranged; Existing friction type speed changer, belt speed changer have that transmission less stable, output torque are little, the weakness of component rapid wear; Existing chain type turriform speed changer has the little weakness of output torque; Existing chain type buncher has weakness such as component rapid wear.Existing number of patent application 02117150.5 " speed changer " has similarity with the present invention, but fundamental difference is arranged again, and it is that the engagement that has disk to drive tooth comes transferring power.The present invention be every group of sleeve gear by the different some sleeve gears of diameter form, the sleeve gear of the big one-level of diameter entangles the sleeve gear of the little one-level of diameter, each sleeve gear can laterally move, and is different with the structure of " speed changer " of number of patent application 02117150.5.

The purpose of this invention is to provide a kind of speed changer, it is in light weight, and volume is little, and transmission is stable, and gearshift performance is good, and gear ratio is big, and the output torque is big, realizes control speed change automatically easily; And simple in structure, easy production and processing.

Summary of the invention the present invention is according to gear-driven principle, set up two groups of sleeve gears, every group of sleeve gear by the different some sleeve gears of diameter form, the sleeve gear of the big one-level of diameter entangles the sleeve gear of the little one-level of diameter, each sleeve gear can laterally move.The interior ring of the sleeve gear of big one-level has the roller seating space of outer shroud of the sleeve gear of sunk key or internal tooth and little one-level to be slidingly connected, the tooth top of the sleeve gear of little one-level is supporting the interior ring of the sleeve gear of big one-level, two groups of relatively parallel and arrangements alternately of sleeve gear, the engagement of respectively stretching out a sleeve gear (sleeve gear of a pair of cooperation) in two groups of sleeve gears comes transferring power, reaches speed change by the engagement of changing the sleeve gear of different operating radius in two groups of sleeve gears.

The object of the present invention is achieved like this: two groups of sleeve gears are arranged, two groups of sleeve gears are relatively parallel and be placed in alternately on input shaft and the output shaft, input shaft and output shaft invariant position, sleeve gear group on the output shaft is connected with ratchet, every group of sleeve gear is made up of several different sleeve gears of diameter, the sleeve gear of the big one-level of diameter entangles the sleeve gear of the little one-level of diameter, each sleeve gear can laterally move, the interior ring of the sleeve gear of big one-level has the roller seating space of outer shroud of the sleeve gear of sunk key or internal tooth and little one-level to be slidingly connected, axle is supporting minimum sleeve gear, the sleeve gear of little one-level is supporting the interior ring of the sleeve gear of big one-level, the axle rotation drives minimum sleeve gear rotation, little one-level sleeve gear rotation drives big one-level sleeve gear rotation, the engagement of respectively stretching out a sleeve gear (sleeve gear of a pair of cooperation) in two groups of sleeve gears comes transferring power, reaches speed change by the engagement of changing sleeve gears different in two groups of sleeve gears.A sleeve gear on every group of sleeve gear only with another group sleeve gear on unique sleeve gear engagement, these two sleeve gears can stretch out or withdrawal simultaneously simultaneously; There is the groove of a circumference in each sleeve gear outside, and moving part is that the side channel that circle shape, inboard have bar to pass inner panel and sleeve gear is slidingly connected, the outside has oblique groove and the male member that moves gear ring to be slidingly connected, and moves part not with axle and sleeve gear rotation; Baffle plate is clamped and is moved gear ring, make the home position that moves gear ring constant and can the regulation angle in rotate; Moving gear ring has protruding axle to be connected with rope, each is linked to be a week to two ropes that move on the gear ring on the sleeve gear that cooperates, there is pulley that rope is tightened and the length of static line at four jiaos, moves that the gear ring outside has raised line, raised line to pass guide plate and centrifugal coil, centrifugal slider is adjacent on the input shaft; Select rope two to fix, pass successively the protruding axle that moves gear ring, fixing pulley, another protruding axle that moves gear ring, another fixing pulley ... the length of selecting rope is tightened during with a pair of sleeve gear engagement wherein and is exceeded, rope and select rope with not flexible rope or chain; Front gear, backgear and engagement are installed respectively on input shaft, output shaft, front gear on the input shaft is connected with ratchet, output shaft is fixedlyed connected with backgear and rear pinion, rear pinion and the engagement of preceding pinion, preceding pinion is fixedlyed connected with friction plate, spring inwardly pushes away preceding pinion and friction plate; Centrifugal slider and centrifugal coil are to be slidingly connected, and have spring to connect between them, and there is friction plate in the centrifugal coil outside and is adjacent to the friction plate of preceding pinion inboard, and hook and guide ribs are arranged on the centrifugal slider, and spring makes hook stretch out centrifugal slider; Several protruding circles and recessed circle are arranged on the guide plate, protruding circle is jagged, centrifugal slider is relative with recessed circle with the protruding circle of guide plate with guide ribs, guide ribs is goed deep into the recessed circle of guide plate, hook and guide ribs are rotated with centrifugal slider, guide ribs is limited at the interior rotation of recessed circle of guide plate, turning radius and the guide ribs and the residing radial location of hook of the rotational speed decision centrifugal slider of centrifugal coil, guide ribs is in the protruding circle indentation, there of guide plate, can conversion enter the different recessed circle of guide plate, hook can hit the raised line that moves gear ring and promote raised line and move gear ring and rotate a certain angle, in the centrifugal slider of withdrawing fully under the guiding that moves the convex inclined plane that distance back hook that gear ring rotated regulation will be on guide plate and separate with the raised line that moves gear ring.

During startup work of the present invention, the input shaft rotation makes the ratchet on the input shaft drive the front gear rotation, backgear on the output shaft, output shaft, rear pinion, preceding pinion rotation, (the not engagement of sleeve gear on this moment two groups of sleeve gears, sleeve gear idle running on the input shaft, sleeve gear does not rotate on the output shaft), pressure spring in the preceding pinion outside inwardly pushes away preceding pinion and friction plate, the friction plate in friction plate and the centrifugal coil outside closely is adjacent to, preceding pinion and friction plate rotation have driven centrifugal coil, centrifugal slider and hook, the guide ribs rotation, the rotational speed of output shaft has determined the rotational speed of centrifugal coil and the turning radius of centrifugal slider, when the input shaft rotational speed increases, output shaft, the rotational speed of preceding pinion and centrifugal coil also increases, under action of centrifugal force, the turning radius of centrifugal slider increases, guide ribs on the centrifugal slider will enter the recessed circle of the big circle of radius of guide plate in the protruding circle indentation, there rising of guide plate, the hook of centrifugal slider impacts the raised line that moves gear ring accordingly and promotes this raised line and this moves gear ring and rotates a certain angle, moving the inboard male member of gear ring drives the oblique groove that moves on the part and makes and move part and inwardly advance, and advance a sleeve gear that is attached thereto to move inward, move part and do not rotate with sleeve gear; Move the gear ring rotation, move the protruding axle tow rope motion on the gear ring, move on the protruding axle that moves gear ring of input shaft, under the pulling of the endless rope of tightening, the protruding axle that moves gear ring of output shaft just moves down simultaneously, makes moving the gear ring rotation and make and moving part and inwardly advance and a sleeve gear that is attached thereto is moved inward of output shaft one side; Input shaft one side move gear ring rotation, depress the selection rope of protruding axle below, making and selecting rope to tighten to drive other to move protruding axle on the gear ring to rise and drive it and move gear ring and make to the certain angle of opposite spin and move part accordingly and sleeve gear is outwards withdrawn; After hook has moved certain distance, on guide plate under the guiding of convex inclined plane in the hook withdrawal centrifugal slider and separate with raised line, it is the rotation of centrifugal slider and hook, drive the raised line rotation that moves gear ring of input shaft one side successively and made and moved part, sleeve gear inwardly advances, with the rope on the time shift gear ring gear ring that moves that adjusting power passes to output shaft one side is made the corresponding part that moves, sleeve gear inwardly advances, two sleeve gears inwardly stretch out up to engagement fully simultaneously, finish speed change one time, at this moment, front gear during by startup, the backgear transferring power is transformed to two groups of sleeve gears and comes transferring power, because the front gear on the input shaft connects ratchet, this moment, front gear was in the idle running situation, do not stress; When the output shaft rotational speed continues to increase, guide ribs on the centrifugal slider will continue the recessed circle that rising enters the bigger circle of radius of guide plate in the protruding circle indentation, there of guide plate, hook will impact the bigger new raised line that moves on the gear ring of radius, identical with above-mentioned movement process and finish the secondary speed change, can improve gear combination and realization automatic speed changing according to this automatically, reach the top gear position; When the output shaft rotational speed descends, centrifugal slider under acting force of the spring and the turning radius of hook, guide ribs reduce, guide ribs is in the protruding circle indentation, there of guide plate, enter the recessed circle of the little circle of guide plate radius, hook on the centrifugal slider will impact corresponding radius less move raised line on the gear ring, finish the deceleration speed change; When the output shaft rotational speed constant, the turning radius of centrifugal slider, hook and guide ribs is constant, remain on rotation in the original recessed circle, be hooked in rotated certain distance after, under the guiding of the convex inclined plane on guide plate the withdrawal centrifugal slider in and do not bump against with raised line, speed change not, hook is released hook by guide plate convex inclined plane rear spring; Irrgular movement significantly can not take place in the centrifugal slider turning radius when the recessed circle of guide ribs and guide plate can make this speed changer be collided when work; During speed change, hook impacts a new male member that moves on the gear ring, this moves gear ring and moves, protruding axle slides the selection rope of tightening, force the gear ring that moves accordingly of the sleeve gear that is meshing to move in the other direction, and the sleeve gear that is meshing is withdrawn, when it in the moment of leaving engagement, the sleeve gear that aforementioned preparation of stretching out is meshed does not also have contact, under the continuation of hook promotes, two new sleeve gears stretch out contact, when contacting but also not meshing, skid between friction plate on the preceding pinion and the friction plate on the centrifugal coil, centrifugal slider, hook, guide ribs and move gear ring and can moment stop the rotation is when output shaft continues rotation, hook continues firmly, because sleeve gear rotation on the input shaft, sleeve gear does not rotate on the output shaft, and the sleeve gear of preparing to mesh meshes easily, the sleeve gear on both sides is meshed fully, finish speed change.

Owing to adopt such scheme, two groups of sleeve gears have replaced the multiple sets of teeth wheel of existing ordinary gear speed changer, have reduced weight and volume, have the advantage that gear transmission is accurate, stable, gear ratio is big again; Because the weight of two groups of sleeve gears of the present invention less than the weight of ordinary gear, only needs littler adjusting power than mobile ordinary gear during speed change, so the present invention controls speed change automatically than the easier realization of existing ordinary gear speed changer widely.

Description of drawings further specifies the present invention below in conjunction with drawings and Examples.

Fig. 1 is a front view of the present invention

Fig. 2 is two groups of sleeve gear figure

Fig. 3 is centrifugal slider, hook, guide ribs figure

Fig. 4 moves gear ring, rope, selection rope figure

1. frames among the figure, 2. input shaft, 3. output shaft, 4. sleeve gear, 5. move part, 6. move gear ring, 7. inner panel, 8. guide plate, 9. baffle plate, 10. front gear, 11. backgears, pinions before 12., 13. rear pinion, 14. ratchets, 15. friction plates, 16. centrifugal seat, 17. centrifugal coil, 18. centrifugal sliders, 19. guide ribs, 20. hooks, 21. raised line, 22. ropes, 23. select rope, 24. protruding axles.

Embodiment such as Fig. 1, input shaft (2) and output shaft (3) are placed on the frame (1) abreast, the distance of diaxon is constant, two groups of sleeve gears (4) are parallel and be placed in respectively alternately on input shaft (2) and the output shaft (3), and the sleeve gear (4) of output shaft (3) is connected with ratchet (14); As Fig. 2, every group of sleeve gear (4) is made up of the different some sleeve gears (4) of diameter, the sleeve gear of the big one-level of diameter (4) entangles the sleeve gear (4) of the little one-level of diameter, each sleeve gear (4) can laterally move, the interior ring of the sleeve gear (4) of big one-level has the roller seating space of the sleeve gear (4) of sunk key or internal tooth and little one-level to be slidingly connected, axle (2), (3) supporting minimum sleeve gear (4), the sleeve gear of little one-level (4) outer shroud is supporting the interior ring of the sleeve gear (4) of big one-level, input shaft (2) rotation drives minimum sleeve gear (4) rotation, little one-level sleeve gear (4) rotation drives big one-level sleeve gear (4) rotation, the engagement of respectively stretching out a sleeve gear (4) (sleeve gear of a pair of cooperation) in two groups of sleeve gears (4) comes transferring power, reaches speed change by the engagement of changing sleeve gears (4) different in two groups of sleeve gears (4).That each sleeve gear (4) in two groups of sleeve gears (4) is when all withdrawing is plane, stretch out Shi Buhui fully touches the sleeve gear (4) of opposite withdrawal and can mesh with the sleeve gear (4) that stretch out on the opposite; There is the groove of a circumference in sleeve gear (4) outside, moving part (5) is the circle shape, the groove that the inboard has bar to pass inner panel (7) and sleeve gear (4) is slidingly connected, the outside has oblique groove and the male member that moves gear ring (6) to be slidingly connected, move part (5) not along with sleeve gear (4) rotation, what inner panel (7) and guide plate (8) were clamped input shaft (2) one sides moves gear ring (6), what inner panel (7) and baffle plate (9) were clamped output shaft (3) one sides moves gear ring (6), be slidingly connected between them, as Fig. 4, moving has protruding axle (24) to be connected with rope (22) on the gear ring (6), each is connected around a circle to two on the sleeve gear (4) that the cooperates ropes (22) that move on the gear ring (6), there is pulley that rope (22) is tightened at four jiaos, moving on the input shaft (2) has raised line (21) on the gear ring (6), raised line (21) pass guide plate (8) and with centrifugal coil (17), centrifugal slider (18) is adjacent, and moving gear ring (6) can only rotate back and forth in several angle; The rope of selection (23) is arranged, its two is fixed, pass successively the protruding axle (24) that moves on the gear ring (6), fixing pulley, another move protruding axle (24) on the gear ring (6), another fixing pulley ... tighten when selecting rope (23) length and be advisable, rope (22) and select rope (23) with the rope or the chain that do not stretch with sleeve gear (4) engagement of a pair of cooperation; Front gear (10) on the input shaft (2) is connected with ratchet (14), backgear (11) is fixedlyed connected with output shaft (3), front gear (10) and backgear (11), preceding pinion (12) and rear pinion (13) engagement, preceding pinion (12) but be connected with the pulley ball with pinion stand that fixedly connected with friction plate (15) in its inboard of move left and right, the outside has pressure spring that preceding pinion (12) is inwardly pushed away; Centrifugal seat (16) is fixedlyed connected with frame (1), centrifugal coil (17) is connected with ball with centrifugal seat (16), centrifugal slider (18) is connected with ball with the inside groove of centrifugal coil (17), between centrifugal slider (18) and the centrifugal coil (17) spring is arranged, there is friction plate (15) in centrifugal coil (17) outside, as Fig. 3, guide ribs (19) and hook (20) are arranged on the centrifugal slider (18), there is spring that hook (20) is stretched out; There is protruding circle and the recessed circle that is round in guide plate (8) outside, protruding circle is jagged, centrifugal slider (18), guide ribs (19) is relative with recessed circle with the protruding circle of guide plate (8), guide ribs (19) is goed deep into the recessed circle of guide plate (8), guide ribs (19) is rotated with centrifugal slider (18), guide ribs (19) is limited at the interior rotation of recessed circle of guide plate (8), can there be rotation in salient point and the spring fixed position between centrifugal slider (18) and centrifugal coil (17), can there be salient point and spring to cooperate with fixed position between the centrifugal coil (17) or two blocks of magnet that repel each other cooperate the guide ribs (19) that prevents on the centrifugal slider (18) in the protruding circle indentation, there of guide plate (8) and protruding circle is positive bumps against at centrifugal slider (18), hook (20) can impact the raised line (21) that moves gear ring (6) and promote to move gear ring (6) and rotate a certain angle, when moving gear ring (6) and rotated the angle of regulation, the engagement of the sleeve gear (4) of a pair of cooperation in two groups of sleeve gears (4), hook (20) are in centrifugal slider (18) is withdrawn in the guiding of guide plate (8) convex inclined plane down and break away from raised line (21).

The present invention can create manual transmission, remove rear pinion (13), preceding pinion (12), friction plate (15), centrifugal seat (16), centrifugal coil (17), centrifugal slider speed-regulating parts such as (18), each rope (22) is connected to outside the frame (1), spurs the moving gear ring (6), move part (5) of its connection of a certain rope (22), sleeve gear (4) just as above-mentioned motion and reach speed change.

Working condition of the present invention, during startup work of the present invention, input shaft (2) rotation makes ratchet (14) drive front gear (10) rotation, backgear (11) rotates and makes output shaft (3), rear pinion (13) and preceding pinion (12) rotation, the friction plate (15) of preceding pinion (12) inboard is along with rotation, pressure spring in preceding pinion (12) outside inwardly pushes away it, make the friction plate (15) in the inboard friction plate (15) of preceding pinion (12) and centrifugal coil (17) outside closely be adjacent to and make centrifugal coil (17) and centrifugal slider (18) and hook (20) and guide ribs (19) rotation, the sleeve gear (4) on two groups of sleeve gears (4) does not mesh at this moment; The rotational speed of output shaft (3) has determined the rotational speed of centrifugal coil (17) and the turning radius of centrifugal slider (18), guide ribs (19) is goed deep into the recessed circle of guide plate (8), guide ribs (19) is limited at the interior rotation of recessed circle of guide plate (8), when input shaft (2) rotational speed increases, the rotational speed of output shaft (3) also increases, under action of centrifugal force, the turning radius of centrifugal slider (18) increases, guide ribs (19) on the centrifugal slider (18) will be in the protruding circle indentation, there of guide plate (8), rising enters the recessed circle of the big one-level of radius of guide plate (8), hook (20) impacts moving the raised line (21) on the gear ring (6) and drive this and moving gear ring (6) rotation of a big one-level of radius, male member (24) band that moves gear ring (6) draws the oblique groove that moves on the part (5) to be made this move part (5) inwardly to advance and make the sleeve gear (4) that is slidingly connected inwardly to advance, move part (5) not along with sleeve gear (4) rotation; Move gear ring (6) rotation, protruding axle (25) band messenger (22) motion on it, move on the protruding axle (25) of input shaft (2) one sides and the rope (22), the protruding axle (25) of output shaft (3) one sides and rope (22) just move down and make that output shaft (3) one sides move accordingly that gear ring (6) rotates, propelling is attached thereto moves part (5) and sleeve gear (4) moves inward simultaneously; Input shaft (2) one sides move gear ring (6) rotation, depress the selection rope (23) of protruding axle (25) below and make that other move that gear ring answers move part (5) and sleeve gear (4) is outwards withdrawn; Be the rotating force of hook (20) drive input shaft (2) one sides move gear ring (6), move part (5), sleeve gear (4) moves and moves gear ring (6) to what adjusting power passed to output shaft (3) one sides by restrict (22) simultaneously, move part (5), sleeve gear (4) also makes it mobile, the sleeve gear at two ends (4) stretches out and meshes, finish speed change one time, front gear (10) during at this moment by startup on the diaxon is transformed to two groups of sleeve gears (4) transferring power with backgear (11) transferring power, because the front gear (10) on the input shaft (2) connects ratchet (14), front gear (10) is in the idle running situation, do not stress; Rotational speed continuation increase when output shaft (3), the turning radius of centrifugal slider (18) continues to increase, guide ribs (19) enters the recessed circle of the big one-level of radius in the protruding circle indentation, there rising of guide plate (8), hook (20) on the centrifugal slider (18) will impact the raised line (21) on the gear ring (6) of moving of the big one-level of radius, identical with above-mentioned movement process and finish the secondary speed change, can improve the gear combination according to this automatically and realize automatic speed changing; When output shaft (3) rotating speed descends, the turning radius of centrifugal slider (18) and guide ribs (19) reduces, guide ribs (19) enters the recessed circle that faces little one-level radius with it mutually in the protruding circle indentation, there of guide plate (8), hook (20) on the centrifugal slider (19) impacts the raised line (21) on the gear ring (6) of moving of the little one-level of radius, and finish the deceleration speed change, can reach minimum gear [by the situation of front gear (10) and backgear (11) transferring power, all sleeve gears (4) on two groups of sleeve gears (4) are withdrawn, do not meshed when promptly starting] successively; When output shaft (3) rotating speed is constant substantially, guide ribs (19) does not rise in the protruding circle indentation, there of guide plate (8) does not fall, and remains on rotation in the original recessed circle; During speed change, hook (20) can hit the raised line (21) that moves gear ring (6) and promote to move gear ring (6) and rotate a certain angle, make and move part (5) and the certain stroke of sleeve gear (4) propelling, after moving gear ring (6) and having rotated the angle of regulation, hook (20) is withdrawn under the guiding of guide plate (8) convex inclined plane in the centrifugal slider (18) fully, hook (20) separates with the raised line that moves gear ring (6) (21), and hook (20) is by behind guide plate (8) convex inclined plane, and spring is released hook (20); During speed change, hook (20) impacts a new raised line (21) that moves on the gear ring (6), this moves gear ring (6) and protruding axle (24) moves and force select to restrict (23) to slide, the sleeve gear that is meshing (4) move gear ring (6) accordingly and protruding axle (24) is mobile in the other direction down in the drive of selecting rope (23), make sleeve gear (4) withdrawal of meshing, when it in the moment of leaving engagement, the sleeve gear (4) of aforesaid two preparation engagements of stretching out does not also have contact, under the continuation rotation of centrifugal slider (18) and hook (20) promotes, two sleeve gears (4) of preparing engagement continue to stretch out and contact, when contacting but also not meshing, can skid between the friction plate (15) in the friction plate (15) that preceding pinion (12) is inboard and centrifugal coil (17) outside, centrifugal slider (18), hook (20) and move gear ring (6) and can moment stop the rotation, when output shaft (3) continues rotation, centrifugal slider (18) and hook (20) continue firmly, because input shaft (2) is gone up sleeve gear (4) rotation, output shaft (3) is gone up sleeve gear (4) and is not rotated, the sleeve gear that preparation is meshed (4) meshes easily, finishes speed change.It is good to be applied to machinery (as bicycle, electric bicycle, motorcycle, automobile, steamer, the windmill etc.) speed changing effect that output shaft (3) has certain rotatory inertia.

Claims

1. speed changer, two groups of parallel relative and staggered being placed on input shaft and the output shaft of sleeve gear are arranged, there is the groove of a circumference in each sleeve gear outside, moving part is the circle shape, the side channel that the inboard has bar to pass inner panel and sleeve gear is slidingly connected, the outside has oblique groove and the male member that moves gear ring to be slidingly connected, baffle plate is clamped and is moved gear ring, moving gear ring has protruding axle to be connected with rope, the rope that moves on the gear ring of the sleeve gear of a pair of cooperation is linked to be a week, there is raised line in the gear ring outside of moving on the input shaft, raised line passes guide plate and centrifugal coil, centrifugal slider is adjacent, select rope two to fix, pass the protruding axle that moves gear ring successively, fixing pulley ... the length of selecting rope is tightened during with a pair of sleeve gear engagement wherein and is exceeded, input shaft, the front gear of output shaft, the backgear engagement, front gear on the input shaft is connected with ratchet, the rear pinion of output shaft and the engagement of preceding pinion, preceding pinion is fixedlyed connected with friction plate, centrifugal slider is slidingly connected with centrifugal coil has spring to be connected between them, the centrifugal coil outside has the friction plate of friction plate and preceding pinion inboard to be adjacent to, hook and guide ribs are arranged on the centrifugal slider, spring makes hook stretch out centrifugal slider, several protruding circles and recessed circle are arranged on the guide plate, protruding circle is jagged, guide ribs is goed deep into the recessed circle of guide plate, it is characterized in that: two groups of parallel relative and staggered being placed on input shaft and the output shaft of sleeve gear, the sleeve gear group is made up of several different sleeve gears of diameter, diameter is big, and to entangle diameter little, and sleeve gear can laterally move.

2. speed changer according to claim 1 is characterized in that: moving the part inboard has the groove in the bar and the sleeve gear outside to be slidingly connected, and moving the part outside has oblique groove and the male member that moves gear ring to be slidingly connected.

3. speed changer according to claim 1 is characterized in that: move gear ring and be connected with rope, two ropes that move gear ring on the sleeve gear of a pair of cooperation are linked to be a week, have pulley that rope is tightened.

4. speed changer according to claim 1, it is characterized in that: select one in rope to be fixed on the frame, pass the protruding axle that moves gear ring, fixing pulley successively ..., select the other end of rope to be fixed on the frame, tighten when selecting rope length and exceed with a pair of sleeve gear engagement wherein.