TWI542506B - Bicycle five speed inner speed change mechanism - Google Patents

Description

Bicycle five-speed internal shifting mechanism

The invention relates to a bicycle shifting device, in particular to a bicycle five-speed internal shifting mechanism.

In order to improve the pedaling efficiency during riding and to apply different slope riding conditions, most bicycles are equipped with a shifting device, which can be roughly divided into an external transmission and an internal transmission according to the components and assembly parts of the transmission. The outer transmission includes a front flywheel, a rear flywheel and two derailleur mechanisms, wherein the front flywheel and the rear flywheel are devices in which a plurality of sprocket wheels of different numbers of teeth are superposed, and the outer transmission system utilizes the two derailleur mechanisms The position of the sprocket of the front and rear flywheels is controlled to change the rotational speed and torque of the front and rear wheels to achieve the purpose of multi-speed shifting. The outer transmission has the advantages of easy manufacturing and low price, but is easier to be in the riding process. Contamination, and the disadvantage that the switching gear is not smooth and the chain is detached from the flywheel;

The internal transmission has a small size and is not limited by the axle space, the shift is stable without derailing when shifting gears, and is not affected by the external environment. Therefore, the internal transmission gradually becomes a folding bicycle and an electric bicycle. The transmission is equipped; however, the invention patent of TW No. 584128 "Improvement of Internal Transmission" discloses a conventional internal transmission, but the power conversion mechanism includes a large number of components, and the shifting process is complicated, so the existing internal transmission There is a need to improve it.

In order to solve the problem that the existing internal transmission has many parts and the shifting process is complicated, the main object of the present invention is to provide a five-speed internal shifting mechanism for bicycles. The present invention mainly uses an axial translation speed adjusting sleeve set to engage or release a plurality of The pawl transmission, as well as the use of the speed slider group to achieve control of the two sun gears, to achieve the purpose of multi-stage shift gear.

The invention solves the prior art problem of the bicycle five-speed internal shifting mechanism, which comprises: a hub unit, the hub unit comprises a hub, a main shaft, a speed control sleeve set and a speed control slider set, the hub An input side and an output side are disposed, and the hub is radially annularly formed to form an inner tooth surface of the hub near the input side, and the hub is radially annularly formed at a position close to the output side to form a hub ratchet surface. An axial center of the hub, the main shaft is a horizontally disposed rod body and includes a latching groove, the latching groove is concave on an outer surface of the main shaft close to the output side, and the speed regulating sleeve group is The sleeve is axially slid relative to the spindle and is adjacent to the input side. The speed control sleeve assembly includes a sleeve body and a first clutch. The sleeve body includes a speed control flange. The speed flange is formed by a radially outward ring convex at a middle portion of the outer ring side of the sleeve body, and the first clutch is disposed around a side of the outer ring side wall of the sleeve body facing the output side, the speed regulating slider Group can be relative to the spindle The axial sliding form is sleeved on the main shaft and includes a slider body. The slider body is a hollow tubular body and is sleeved and fixed to the main shaft. The slider body is adjacent to the output side. Forming a plurality of snap protrusions; a transmission shifting unit, the transmission shifting unit is a sprocket unit coupled to the input side of the hub unit, the transmission shifting unit includes a sprocket sleeve mechanism and a chain disc, The sprocket sleeve mechanism is disposed on a side of the main shaft close to the input side, and the sprocket sleeve mechanism comprises a sprocket sleeve and a second clutch, and one side of the sprocket sleeve is sleeved on the sleeve The sprocket sleeve is sleeved on the outer side of the main shaft, and the second clutch is disposed on the outer circumferential surface of the sprocket sleeve adjacent to the speed control sleeve group. The sprocket is sleeved and fixed. a second shifting unit, wherein the second shifting unit is a planetary gear unit and is disposed on a side of the main shaft close to the output side, the second shifting unit is disposed On the inner side of the hub, the second shifting unit package a first sun gear, a second sun gear, a first planet arm, a second planet arm, a third planet arm, a plurality of first planet gears, a plurality of second planet gears, and a third clutch, The first sun gear is sleeved on the slider body, the first sun gear is transversely formed to form a first snap hole, and the first snap hole and the plurality of snap protrusions of the slider body are mutually buckled, and the second a sun gear is sleeved on the main shaft and located between the output side and the first sun gear, the second sun gear abuts against the first sun gear toward the side of the sleeve body, and the second sun gear is formed transversely a first-level hole, the side of the class hole close to the first sun gear forms a second snap hole, the second snap hole communicates with the first snap hole, and the first planet arm covers the slider Externally, the first planetary arm is an upright ring body and is located between the sleeve body and the first sun gear, and the first planet arm is concavely disposed with a planetary ratchet surface adjacent to an inner ring side of the sleeve body. a second planet arm is wrapped around the slider body Externally, the second planet arm is an upright ring body and is located between the first sun gear and the output side, the second planet arm is spaced apart from the first planet arm, and the third planet arm is an upright ring And between the output side and the second sun gear, and the third planet arm is spaced apart from the second planet arm, the plurality of first planet gears are pivotally disposed on the first planet arm and the second Between the planet arms, and the plurality of first planet gears mesh with the first sun gear, the plurality of second planet gears are pivotally disposed between the second planet arm and the third planet arm, and the plurality of a second planetary gear meshes with the second sun gear, the third clutch ring is sleeved on a side of the third planetary arm that is close to the output side, the third clutch is engaged with the hub ratchet surface; and a third shifting gear a third shifting unit is disposed inside the hub of the hub unit and coupled to the sleeve body, the transmission shifting unit and the second shifting unit, the third shifting unit includes a ring gear and a fourth clutch. The a ring gear is located inside the hub and covers a side of the chain sleeve close to the speed control sleeve set, the sleeve body and the second shifting unit, the ring gear includes a one-way ratchet surface and a synchronization An inner tooth surface, the one-way ratchet surface ring is recessed on an inner side wall of the ring gear adjacent to the input side, the second clutch is engaged on the one-way ratchet surface, and the synchronous inner tooth surface ring is concavely disposed on the ring gear An inner side wall of the output side, and the synchronous inner tooth surface is in mesh with the first planetary gears and the second planetary gears of the second shifting unit, the fourth clutch is disposed on the ring side wall of the ring gear and is located in the hub The flank is radially inward and the timing flange abuts against the fourth clutch.

The bicycle five-speed internal shifting mechanism, wherein the ring gear comprises a plurality of perforations, the plurality of perforations are radially spaced through the ring gear and corresponding to the inner tooth surface of the hub of the hub, the fourth clutch comprises a plurality of The latch and the plurality of fourth pawls, each of the fourth pawls are respectively combined with a latch and disposed in a corresponding pinhole.

The bicycle five-speed internal shifting mechanism, wherein the main shaft has a receiving groove adjacent to the input side, the speed regulating slider set includes a limiting washer and a speed regulating spring, and the limiting spacer is provided In the accommodating groove, the speed regulating spring is sleeved on the main shaft and one end thereof abuts against the limiting pad, and the other end abuts against the slider body.

In the bicycle five-speed internal shifting mechanism, the sprocket sleeve mechanism includes a control spring, and the control spring is sleeved on the main shaft and one end thereof abuts against the sleeve body.

The above-mentioned bicycle five-speed internal shifting mechanism, wherein the sleeve body includes a speed control chamber, the speed control chamber is an opening facing the output side and forms an accommodation space in the speed control sleeve, and the slider body can be The sliding is placed in the speed control chamber of the sleeve body.

The above-mentioned bicycle five-speed internal shifting mechanism, wherein the main shaft includes a latching slot and a latching rod, and the latching slot is formed by a recessed radially inward of the side of the outer ring of the spindle, and the latching slot is located in the receiving slot And the output side is adjacent to the receiving groove, the latching rod is disposed on the latching slot and the bottom surface of the latching rod protrudes from the outer ring side of the main shaft, and the inner ring side of the slider body is recessed radially outwardly The driving slot is corresponding to the outside of the latching slot, and the latching pole is clamped between the driving slot and the control slot.

The bicycle five-speed internal shifting mechanism, wherein the main shaft includes a control slot, a through hole, a control rod and a connecting rod, the control slot extends radially through the main shaft and is located between the receiving slot and the input side The through hole is axially penetrated from one end of the main shaft to the side of the main shaft and communicates with the control slot. The control rod is transversely disposed in the control slot, so that the control rod can be in the control slot Moving toward the movement, and the two ends of the control rod extend out of the control slot, the connecting rod is inserted into the through hole and provided with two ends, one end of the connecting rod is fixed to the control rod, and the other end is worn through the same When the hole is extended and the main shaft is extended, and the control rod and the sleeve body are fixed to each other, the connecting rod can drive the sleeve body to move axially relative to the main shaft.

In the bicycle five-speed internal shifting mechanism described above, each of the fourth pawls is a V-shaped pawl.

The bicycle five-speed internal shifting mechanism, wherein the first, second and third clutches are one-way pawl clutches, the first clutch comprises a plurality of first pawls and a first bundle ring, the second The clutch includes a plurality of second pawls and a second bundle ring, each second pawl is buckled on the one-way ratchet surface, the third clutch includes a plurality of third pawls and a third bundle ring, each third The pawl snaps onto the hub ratchet face.

The achievable effects of the technical means of the present invention include: the present invention is based on a planetary gear system of a main shaft, a sun gear, a planetary gear, a ring gear and two planetary arms, and is arranged through a plurality of clutches together with an axially movable sleeve. The barrel body and the slider body provide control, and can provide up to five gear positions, which simplifies the design of the speed governing mechanism, and achieves the effect of easy handling and actuation.

In order to understand the technical features and practical effects of the present invention in detail, and in accordance with the present invention, further details are shown in the following preferred embodiments.

The preferred embodiment of the bicycle five-speed internal shifting mechanism provided by the present invention is as shown in FIG. 1 to FIG. 3. The bicycle five-speed internal shifting mechanism includes a hub unit 10, a transmission shifting unit 20, and a second shifting speed. Unit 30 and a third shifting unit 40, wherein:

The hub unit 10 includes a hub 11 , two dustproof covers 12 , a ball bearing seat 13 , a ball bearing 14 , a main shaft 15 , a speed control sleeve set 16 , and a speed control slider set 17 . a horizontally disposed cylinder, the hub 11 includes an input side 111 and an output side 112. The hub 11 is radially annularly formed adjacent to the input side 111 to form a hub inner tooth surface 113. The inner tooth surface 113 of the hub is a The hub 11 is radially annularly recessed on the side wall of the inner ring of the output side 112 to form a receiving groove 114. The hub 11 is radially annularly formed at a position close to the receiving groove 114 to form a hub ratchet surface 115. The two dustproof covers 12 are respectively disposed on the input side 111 and the output side 112 of the hub 11, and the two dustproof covers 12 each have a through hole 121 disposed axially therethrough;

The ball bearing block 13 abuts against the inner side of the dust cover 12 adjacent to the output side 112. The ball bearing 14 abuts the ball bearing seat 13 and is received in the receiving groove 114. The main shaft 15 is along the wheel hub 11 The shaft core is disposed and fixed to the two dustproof covers 12, the ball bearing seat 13 and the ball bearing 14, such that the two dustproof covers 12, the ball bearing seat 13 and the ball bearing 14 are opposite when the hub 11 is rotated. The spindle 15 is rotated by a shaft. The spindle 15 is a horizontally disposed rod body and includes a receiving slot 151, a control slot 152, a latching slot 153, a through hole 154, a lever 155, and a card. a bolster 156 and a connecting rod 157, the accommodating groove 151 is concavely disposed on the outer surface of the input shaft 111. The control slot 152 extends through the main shaft 15 and is located at the receiving slot 151 and the input side. The latching slot 153 is formed by the inner side of the outer ring of the main shaft 15 being radially inwardly recessed. The latching slot 153 is located between the receiving slot 151 and the output side 112 and adjacent to the receiving slot 151. The through hole 154 is axially penetrated from the side of the input side 111 by the main shaft 15 and penetrates one end of the main shaft 15 with the control The slot 152 is communicated, and the control rod 155 is transversely disposed in the control slot 152 such that the lever 155 can move axially in the control slot 152, and both ends of the lever 155 extend out of the control slot 152, the card The bolt 156 is disposed on the latching groove 153 and has a bottom surface protruding from the outer ring side of the main shaft 15. The connecting rod 157 is disposed in the through hole 154 and is provided with two ends. One end of the connecting rod 157 is fixed. The other end of the control rod 155 extends through the through hole 154;

As shown in FIG. 2 to FIG. 4 , the speed control sleeve set 16 is sleeved on the main shaft 15 and close to the input side 111 in a form of axial sliding relative to the main shaft 15 , and includes a sleeve body. 161 and a first clutch, the sleeve body 161 is sleeved on the main shaft 15 and surrounds the outside of the accommodating groove 151. The sleeve body 161 is a class cylindrical body, and the sleeve body 161 includes a tone. The speed flange 162 and the speed control chamber 163 are formed by a radially outwardly convex portion of the middle portion of the outer ring side of the sleeve body 161. The speed control chamber 163 is an opening toward the output side 112. And the accommodating space is formed in the sleeve body 161. The first clutch is disposed on a side of the outer ring side wall of the sleeve body 161 facing the output side 112. The first clutch is a one-way pawl. The clutch includes a plurality of first pawls 164 and a first bundle of rings, each of the first pawls 164 is spaced around an outer ring sidewall disposed on the sleeve body 161, and the sleeve body 161 is at the speed control flange 162 and a side of the sleeve body 161 facing the input side 111 erect through a connecting hole 165, then The connecting rod 157 passes through the connecting hole 165 and the control slot 152, and the connecting rod 157 can drive the sleeve body 161 to move axially relative to the main shaft 15;

As shown in FIG. 2 to FIG. 4 , the speed regulating slider set 17 is sleeved on the main shaft 15 in a form of axial sliding relative to the main shaft 15 , and includes a limiting washer 171 and a speed control. a spring 172, a slider body 173 and a slider collar 174, the limiting spacer 171 is disposed on the receiving slot 151 of the spindle 15, the governing spring 172 is sleeved on the spindle 15 and one end thereof abuts The slider body 173 is a hollow tube body and is axially slidable relative to the main shaft 15. The slider body 173 is sleeved on the control slot 152 of the spindle 15 and outside the latching rod 156. The slider body 173 is slidably received in the speed control chamber 163 of the sleeve body 161. The slider body 173 is adjacent to the side of the output side 112 to form a plurality of snap protrusions 175. The latching protrusion 175 is a square-shaped protrusion. The inner ring side of the slider body 173 is recessed radially outward to form a driving slot 176. The driving slot 176 is located outside the latching slot 153. 151 is formed between the driving groove 176 and the control slot 152, the spindle 15 can drive the slider body 173 to rotate, and the slider collar 174 is sleeved on the The block body 173 side closer to the input side 111 such that the slider 174 abuts against the collar of the governor spring 172.

The transmission shifting unit 20 is a sprocket device coupled to the input side 111 of the hub unit 10, the transmission shifting unit 20 includes a sprocket sleeve mechanism 21, an outer ball bearing 22, and a chain plate 23, the chain The disc sleeve mechanism 21 is sleeved on a side of the main shaft 15 close to the input side 111 and is coupled with the dust cover 12 on the input side 111. The sprocket sleeve mechanism 21 includes a sprocket sleeve 211 and a a second clutch, an inner ball bearing 213 and a control spring 214. The sprocket sleeve 211 is a circular-stage cylinder, and one side of the sleeve body 161 is disposed outside the input side 111. The sprocket sleeve 211 is sleeved on the outside of the main shaft 15. The other side of the sprocket sleeve 211 is extended by the through hole 121 of the dust cover 12 on the input side 111, and the sprocket sleeve 211 The middle portion is located at the inner edge of the through hole 121 of the dust cover 12 on the input side 111;

The second clutch is disposed on the outer circumferential surface of the speed control sleeve group 16 , and the second clutch is a one-way pawl clutch. The two clutches include a plurality of second pawls 212 and a second clutch a second bail, each of the second pawls 212 is disposed around the sprocket sleeve 211 adjacent to the slewing sleeve set 16 , and the inner ball bearing 213 is interposed between the main shaft 15 and the sprocket sleeve 211 . The control spring 214 is sleeved on the main shaft 15 , and the two sides of the control spring 214 abut against the inner ball bearing 213 and the sleeve body 161 respectively. The outer ball bearing 22 is engaged on the input side of the hub 11 . 111 is disposed between the middle portion of the sprocket sleeve 211, and the outer ball bearing 22 is located inside the dust cover 12 adjacent to the input side 111 and abuts against the sprocket sleeve 211, and the sprocket 23 is sleeved and The sprocket sleeve 211 is fixed to a portion of the sprocket sleeve 211 extending from the dust cover 12, and the sprocket 23 is connected to a chain transmission device (not shown) through which the human or mechanical force can be driven. The sprocket sleeve 211 rotates and transmits power to the other parts.

The second shifting unit 30 is a planetary gear device and is sleeved on a side of the main shaft 15 that is close to the output side 112. The second shifting unit 30 is disposed inside the hub 11. The second shifting unit 30 includes a limit. a spacer 31, a first sun gear 32, a second sun gear 33, a first planet arm 34, a second planet arm 35, a positioning spring 36, a third planet arm 37, and a plurality of first planets a gear 38, a plurality of second planetary gears 39, and a third clutch, the limiting washer 31 is sleeved at a middle portion of the slider body 173, the first sun gear 32 is sleeved on the slider body 173, and the The first sun gear 32 abuts against the limiting pad 31 toward the side of the sleeve body 161. The first sun gear 32 extends transversely to form a class hole, and the side of the class hole facing the output side 112 is a The first latching hole 321 has a shape corresponding to the plurality of latching protrusions 175, the first latching hole 321 and the plurality of latching protrusions 175 of the slider body 173 Mutual snapping;

The second sun gear 33 is sleeved on the main shaft 15 and located between the output side 112 and the first sun gear 32 . The second sun gear 33 abuts against the first sun gear 32 toward the side of the sleeve body 161 . The second sun gear 33 extends transversely to form a class of holes. The side of the class hole adjacent to the first sun gear 32 is a second snap hole 331. The shape of the second button hole 331 is also related to the plurality of holes. The latching protrusions 175 are corresponding to each other, and the inner diameter of the second latching hole 331 is equal to the inner diameter of the first latching hole 321 , and the second latching hole 331 is in communication with the first latching hole 321 , so that The plurality of latching protrusions 175 of the slider body 173 can slide between the second latching holes 331 and the first latching holes 321;

The first planetary arm 34 is wrapped around the slider body 173 and the limiting spacer 31. The first planetary arm 34 is an upright class ring body and is located in the sleeve body 161 and the first sun gear 32. A planetary ratchet surface 341 is recessed from the inner ring side of the sleeve body 161, and an inner diameter of the planetary ratchet surface 341 is the same as an outer diameter of the plurality of first pawls 164. The second planetary arm 35 is wrapped around the slider body 173 and the second locking hole 331 of the second sun gear 33. The second planetary arm 35 is an upright class ring body and is located at the first sun gear. The second planetary arm 35 is spaced apart from the first planetary arm 34. The positioning spring 36 is sleeved on the main shaft 15 and is close to the output side 112 of the hub 11. The positioning spring One end of 36 abuts against a side of the second sun gear 33 facing the output side 112, the third planet arm 37 is wrapped around the outside of the positioning spring 36, and the third planet arm 37 is an upright class ring body And located between the output side 112 of the hub 11 and the second sun gear 33, and the third planet 37 and the second planetary arm 35 is spaced;

The plurality of first planetary gears 38 are pivotally disposed between the first planetary arm 34 and the second planetary arm 35 by a plurality of pivots, and the plurality of first planetary gears 38 are coupled to the first sun gear 32 Engaging, the plurality of second planetary gears 39 are pivotally disposed between the second planetary arm 35 and the third planetary arm 37 by a plurality of pivots, and the plurality of second planetary gears 39 and the second sun gear 33 is engaged, the third clutch is sleeved on a side of the third planetary arm 37 that is close to the output side 112, the third clutch is a one-way pawl clutch, and the third clutch includes a plurality of third pawls 301 and a third bundle ring, the third clutch is engaged with the hub ratchet surface 115, that is, the plurality of third pawls 301 are engaged with the hub ratchet surface 115 of the hub 11.

The third shifting unit 40 is disposed in the hub interior 11 of the hub unit 10 and is coupled to the sleeve body 161, the transmission shifting unit 20, and the second shifting unit 30. The third shifting unit 40 includes a ring gear 41. And a fourth clutch 42 located inside the hub 11 and covering a side of the chain sleeve 211 close to the speed control sleeve group 16, the sleeve body 161, and the plurality of first planets The gear 38 and the outside of the plurality of second planetary gears 39 include a one-way ratchet surface 411, a plurality of perforations 412 and a synchronous internal tooth surface 413. Please refer to FIG. 4 and FIG. The ratchet surface 411 is annularly disposed on the inner side wall of the ring gear 41 adjacent to the input side 111. The second clutch is engaged with the one-way ratchet surface 411, that is, the second pawl 212 of the sprocket sleeve mechanism 21 is engaged. In the one-way ratchet surface 411, the plurality of pinholes 412 are radially spaced through the ring gear 41 and correspond to the hub inner tooth surface 113 of the hub 11, and the plurality of pinholes 412 are correspondingly disposed on the sleeve. The outer circumference of the speed regulating flange 162 of the barrel body 161, the plurality of holes 412 respectively An elongated hole, the synchronous internal tooth surface 413 is annularly recessed on the inner side wall of the ring gear 41 adjacent to the output side 112, and the synchronous internal tooth surface 413 and the plurality of first planetary gears 38 of the second shifting unit 30 And a plurality of second planetary gears 39 mesh with each other.

Referring to FIG. 2, FIG. 4 and FIG. 6, the fourth clutch 42 is disposed in the plurality of through holes 412 of the ring gear 41 and includes a plurality of pins 421 and a plurality of fourth pawls 422. The fourth pawls 422 are respectively disposed in a corresponding pinhole 412 in combination with a pin 421. Preferably, each of the fourth pawls 422 is V-shaped. a pawl, because the speed regulating flange 162 abuts against one end of each of the fourth pawls 422, leaving the other end of each fourth pawl 422 away from the 113, and the fourth pawl 422 and the hub of the hub 11 The inner tooth surface 113 forms a gap such that each of the fourth pawls 422 cannot be snapped to the inner tooth surface 113 of the hub.

As shown in FIG. 4, the present invention is capable of inputting power from the transmission shifting unit 20 to the second shifting unit 30 and the third shifting unit 40, and the adjustment of the sleeve body 161 and the slider body 173 is switched differently. The gear positions, in turn, produce different speed differences and transmit power to the hub unit 10.

As shown in FIG. 7 to FIG. 9 , which is a schematic diagram of the power transmission direction of the fifth gear of the present invention, the speed control flange 162 of the sleeve body 161 does not abut against each of the fourth pawls 422 of the fourth clutch 42 . As shown in FIG. 8 , the centrifugal force when the ring gear 41 rotates causes one end of each of the fourth pawls 422 to be tilted, so that the fourth pawls 422 are clamped to the hub inner tooth surface 113 of the hub 11 . The first pawl 164 of the cartridge set 16 is engaged with the planetary ratchet surface 341 of the first planetary arm 34, and the degree of tightening of the positioning spring 36 is adjusted to allow the plurality of snap projections 175 of the slider body 173 to The first snap holes 321 of the first sun gear 32 are mutually buckled, and the power is driven by the chain to rotate the chain plate 23. As shown in FIG. 9, each of the second pawls 212 is a one-way pawl clutch, and each second The pawl 212 is disposed in the pawl groove provided by the sprocket sleeve 211, and connects the sprocket sleeve 211 and the ring gear 41. When the rotation speed of the sprocket sleeve 211 is smaller than the ring gear 41, this The one-way ratchet surface 411 generates a force to press each of the second pawls 212 back into the pawl groove, so that the sprocket sleeve 211 is disconnected from the ring gear 41. Overspeed (overrunning) characteristic, each second one-way ratchet pawl 212 is separated from the surface 411 without generating a clamping effect;

Similarly, since the angular velocity of the hub 11 is greater than the angular velocity of the third planetary arm 37 to generate an overspeed characteristic, the third pawl 301 is disengaged from the hub ratchet surface 115 without causing a clamping effect, and the power is transmitted through the sprocket. 23 is transmitted to the speed control sleeve set 16 , because the first pawl 164 is engaged with the planetary ratchet surface 341 , so that the speed control sleeve set 16 drives the first planetary arm 34 to rotate, and the first planetary arm 34. The pivots of the second planetary arms 35 are driven by the pivots of the first planetary gears 38. Since the slider body 173 and the first sun gear 32 are engaged with each other, the plurality of first planetary gears 38 can be The ring gear 41 is driven by the synchronous internal tooth surface 413. Since the fourth pawls 422 are engaged with the hub inner tooth surface 113 of the hub 11, the ring gear 41 drives the hub 11 by the fourth pawls 422. Then, the final power is transmitted from the ring gear 41 to the hub 11 via the fourth clutch 42 and is output.

As shown in FIG. 10, it is a schematic diagram of the power transmission direction of the fourth gear of the present invention. At this time, the speed regulating flange 162 of the sleeve body 161 does not abut against the fourth pawls 422 of the fourth clutch 42. Extending the positioning spring 36 causes the first sun gear 32 and the second sun gear 33 to move toward the input side 111 such that the plurality of snap protrusions 175 of the slider body 173 and the second sun gear 33 The two latching holes 331 are mutually latched and maintain the position of the sleeve body 161 of the fifth gear. As shown in FIG. 8, the centrifugal force when the ring gear 41 rotates causes one end of each of the fourth pawls 422 to be tilted, so that each The fourth pawl 422 is engaged with the hub inner tooth surface 113 of the hub 11 , and the first pawl 164 of the speed control sleeve set 16 is engaged with the planetary ratchet surface 341 of the first planetary arm 34 . The chain drives the chain plate 23 to rotate. As shown in FIG. 9, the rotation speed of the chain sleeve 211 is smaller than that of the ring gear 41, and an overspeed feature is also generated, so that the second pawls 212 are disengaged from the one-way ratchet surface 411. Does not produce a carding effect, the same, because the angular velocity of the hub 11 is greater than the angular velocity of the third planet arm 37 Characteristics, so that the third pawl 301 from the ratchet wheel 115 without generating a clamping surface effect;

The power is transmitted to the speed control sleeve group 16 via the chain plate 23, because the first pawl 164 is engaged with the planetary ratchet surface 341, so that the speed control sleeve group 16 drives the first planetary arm 34 to rotate. The first planetary arm 34 drives the second planetary arm 35 to rotate via the pivots of the first planetary gears 38, and the pivots of the second planetary arm 35 are disposed via the second planetary gears 39. The third planetary gear 37 is rotated by the slider body 173 and the second sun gear 33, and the plurality of second planetary gears 39 can drive the ring gear 41 via the synchronous internal tooth surface 413. When the pawl 422 is engaged with the hub inner tooth surface 113 of the hub 11, the ring gear 41 drives the hub 11 by the fourth pawl 422, and the final power is transmitted from the ring gear 41 to the fourth clutch 42 via the fourth clutch 42. The hub 11 is output.

As shown in FIG. 11 , it is a schematic diagram of a power transmission direction of a third gear (direct output gear) of the present invention, and the connecting rod 157 is pulled toward the input side 111 to drive the sleeve body 161 such that the sleeve body 161 Sliding toward the input side 111, and the first pawl 164 is not engaged with the planetary ratchet surface 341. At this time, the speed regulating flange 162 of the sleeve body 161 does not abut the fourth clutch 42. Each of the fourth pawls 422, as shown in FIG. 8, the centrifugal force when the ring gear 41 rotates causes one end of each of the fourth pawls 422 to be tilted, so that the fourth pawls 422 are engaged with the hub teeth of the hub 11. Face 113, and maintaining the position of the slider body 173 in the fourth gear, the slider body 173 and the second sun gear 33 are engaged with each other, and the power is driven by the chain to rotate the chain plate 23, and the chain plate 23 is synchronized. The sprocket sleeve 211 is rotated, and the second pawl 212 is engaged with the one-way ratchet surface 411 of the ring gear 41, so that the ring gear 41 rotates with the fourth pawl 422. The inner tooth surface 113 of the hub of the hub 11 is such that the final power is transmitted directly from the ring gear 41 through the fourth clutch 42. The hub 11 is directly output.

As shown in FIG. 12, it is a schematic diagram of the power transmission direction of the second gear of the preferred embodiment of the present invention. When the connecting rod 157 is pulled to bring the sleeve body 161 closer to the input side 111 relative to the third gear position, The timing flange 162 of the sleeve body 161 abuts against each of the fourth pawls 422 of the fourth clutch 42 . Referring to FIG. 6 , the fourth pawls 422 are not engaged with the inner tooth surface of the hub of the hub 11 . 113, and maintaining the position of the first sun gear 32 and the second sun gear 33 in the third gear, and the slider body 173 and the second sun gear 33 are mutually buckled, the second sun gear 33 can be Rotating synchronously with the main shaft 15 by the slider body 173, wherein the power is driven by a chain to rotate the sprocket 23, the sprocket 23 synchronously drives the sprocket sleeve 211 to rotate, please refer to FIG. 5, and because of the second The clutch 212 is engaged with the one-way ratchet surface 411 of the ring gear 41 such that the ring gear 41 rotates. The synchronous internal tooth surface 413 of the ring gear 41 drives the plurality of second planetary gears 39 of the second shifting unit 30. Rotating, and the plurality of second planetary gears 39 are via the second sun gear 33 The slider body 173 is rotated and the spindle is rotated. Since the third pawl 301 is engaged with the hub ratchet surface 115 of the hub 11, the final power is transmitted from the third planetary arm 37 to the hub through the third pawl 301. 11 and output.

As shown in FIG. 13, which is a schematic diagram of the power transmission direction of the first gear of the preferred embodiment of the present invention, maintaining the position of the sleeve body 161 in the second gear, the speed control flange of the sleeve body 161 162 abuts the fourth pawls 422 of the fourth clutch 42, please refer to FIG. 6, so that the fourth pawls 422 are not caught in the hub inner tooth surface 113 of the hub 11, and the speed regulating spring 172 is extended. When the first sun gear 32 and the second sun gear 33 move toward the output side 112, the first sun gear 32 and the second sun gear 33 return to the position at the fifth gear, so that the slider body 173 The plurality of latching protrusions 175 are engaged with the first latching holes 321 of the first sun gear 32, and the first sun gear 32 can be rotated synchronously with the spindle 15 by the slider body 173, wherein the power is controlled by A chain guide rotates the chain plate 23, and the chain plate 23 synchronously drives the chain sleeve 211 to rotate. Referring to FIG. 5, the second clutch 212 is engaged with the one-way ratchet surface 411 of the ring gear 41, so that the chain The ring gear 41 rotates accordingly, and the synchronous internal tooth surface 413 of the ring gear 41 drives the second shifting unit 30. The plurality of first planetary gears 38 rotate, and the plurality of first planetary gears 38 drive the slider body 173 and the spindle 15 to rotate via the first sun gear 32, because the third pawl 301 is locked to the hub 11 The hub ratchet surface 115 transmits the final power to the hub 11 through the third pawl 301 through the third pawl 301.

10 Hub unit 11 Hub 111 Input side 112 Output side 113 Hub internal tooth surface 114 accommodating groove 115 Hub ratchet surface 12 Dust cover 121 Through hole 13 Ball bearing housing 14 Ball bearing 15 Spindle 151 accommodating groove 152 Control groove 153 Snap groove 154 through hole 155 control rod 156 card bolt 157 connecting rod 16 speed control sleeve set 161 sleeve body 162 speed control flange 163 Speed control room 164 First pawl 165 Linking hole 17 Speed control slider set 171 Limit washer 172 Speed control spring 173 Slider body 174 Slider collar 175 Buckle projection 176 Drive slot 20 Transmission shifting unit 21 Chain Disc sleeve mechanism 211 Chain sleeve 212 Second pawl 213 Inner ball bearing 214 Control spring 22 Outer ball bearing 23 Chain 30 Second shifting unit 301 Third pawl 31 Limit washer 32 first sun gear 321 first snap hole 33 second sun gear 331 second snap hole 34 first planet arm 341 planet ratchet face 35 second planet arm 36 positioning spring 37 third planet arm 38 first planet gear 39 Second planetary gear 40 Third shifting unit 41 Ring gear 411 One-way ratchet surface 412 Toothed hole 413 Synchronous internal tooth surface 42 Fourth clutch 421 Pin 422 Fourth pawl

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view showing the appearance of a preferred embodiment of the present invention. Figure 2 is an exploded perspective view of the appearance of a preferred embodiment of the present invention. Figure 3 is an exploded perspective view of a partial appearance of a preferred embodiment of the present invention. Figure 4 is a side cross-sectional side view of a preferred embodiment of the present invention. Figure 5 is a cross-sectional side view taken along line 5-5 of Figure 4 in a preferred embodiment of the present invention. Figure 6 is a cross-sectional side view taken along line 6-6 of Figure 4 of the preferred embodiment of the present invention. Figure 7 is a schematic illustration of the power transmission direction of the fifth gear of the preferred embodiment of the present invention. Figure 8 is a cross-sectional side view taken along line 8-8 of Figure 7 in a preferred embodiment of the present invention. Figure 9 is a cross-sectional side view taken along line 9-9 of Figure 7 in a preferred embodiment of the present invention. Figure 10 is a schematic illustration of the power transmission direction of the fourth gear of the preferred embodiment of the present invention. Figure 11 is a schematic illustration of the power transmission direction of the third gear of the preferred embodiment of the present invention. Figure 12 is a schematic illustration of the power transmission direction of the second gear of the preferred embodiment of the present invention. Figure 13 is a schematic illustration of the power transmission direction of the first gear of the preferred embodiment of the present invention.

10 Hub unit 11 Hub 111 Input side 112 Output side 113 Hub internal tooth surface 114 accommodating groove 115 Hub ratchet surface 12 Dust cover 121 Through hole 13 Ball bearing housing 14 Ball bearing 15 Spindle 151 accommodating groove 152 Snap groove 155 Control lever 157 connecting rod 16 speed control sleeve set 161 sleeve body 162 speed control flange 163 speed control room 164 One pawl 165 Linking hole 17 Speed control slider set 171 Limit washer 172 Speed control spring 173 Slider body 174 Slider collar 20 Transmission shifting unit 21 Chain sleeve mechanism 211 Chain sleeve 212 Second pawl 213 Inner ball bearing 214 Control spring 22 Outer ball bearing 23 Chain plate 30 Second gear unit 34 First planet arm 341 Planetary ratchet face 35 Second planet arm 37 Third planet arm 38 First planet 39 a second planetary gear wheel 40 the ring gear 41 of the third transmission unit 411 one-way ratchet surface 412 opposite the inner flank synchronization perforations 413 42 of the fourth clutch pawls 421 of the fourth latch 422

Claims (9)

A bicycle five-speed internal shifting mechanism includes: a hub unit including a hub, a spindle, a speed control sleeve set, and a speed control slider set, the hub including an input side and an output side, The hub is radially annularly formed near the input side to form a hub inner tooth surface, and the hub is radially annularly formed at a position close to the output side to form a hub ratchet surface, the main shaft is disposed along the axis of the hub, The main shaft is a horizontally disposed rod body, and the speed control sleeve set is sleeved on the main shaft and is close to the input side in a form of axial sliding relative to the main shaft. The speed control sleeve set includes a sleeve body and a first clutch, the sleeve body includes a speed control flange formed by a radially outwardly convex portion at a middle portion of a side surface of the outer ring of the sleeve, the first clutch being circumferentially disposed on the sleeve body The side of the outer ring side wall facing the output side, the speed regulating slider set is sleeved on the main shaft in a form of axial sliding relative to the main shaft, and includes a slider body, the slider body is hollow The tube body is sleeved and fixed to the main body a shaft, a side of the slider body adjacent to the output side is annularly formed to form a plurality of snap protrusions; a transmission shifting unit, the transmission shifting unit is a sprocket device coupled to the input side of the hub unit, the transmission The shifting unit includes a sprocket sleeve mechanism and a sprocket sleeve. The sprocket sleeve mechanism is sleeved on a side of the main shaft close to the input side. The sprocket sleeve mechanism includes a sprocket sleeve and a second clutch. One side of the sprocket sleeve is sleeved on the input side of the sleeve body, and the sprocket sleeve is sleeved on the outside of the main shaft, and the second clutch is disposed on the sprocket sleeve near the adjustment An outer peripheral surface of the speed sleeve set, the sprocket is sleeved and fixed to a portion of the sprocket sleeve extending from the hub; a second shifting unit, the second shifting unit is a planetary gear device and is sleeved thereon a spindle is disposed on a side of the output side, the second shifting unit is disposed on an inner side of the hub, and the second shifting unit includes a first sun gear, a second sun gear, a first planet arm, and a second planet arm. a third planetary arm, a plurality of a first planetary gear is disposed on the slider body, and the first sun gear is transversely formed to form a first snap hole, the first snap hole and the first a plurality of latching protrusions of the slider body are buckled with each other, a second sun gear is sleeved on the spindle and located between the output side and the first sun gear, and the second sun gear is attached to the side of the sleeve body Relying on the first sun gear, the second sun gear is transversely formed to form a class hole, and the side of the class hole adjacent to the first sun gear forms a second snap hole, the second snap hole and the first a latching hole is communicated, the first planet arm is wrapped around the slider body, the first planet arm is an upright ring body and is located between the sleeve body and the first sun gear, the first planet arm is close to a side of the inner ring of the sleeve body is recessed with a planet ratchet surface, the second planet arm is wrapped around the outer portion of the slider body, the second planet arm is an upright ring body and is located at the first sun gear and the output side Between the second planet arm and the first a planet arm is spaced apart, the third planet arm is an upright ring body and is located between the output side and the second sun gear, and the third planet arm is spaced apart from the second planet arm, the plurality of a first planetary gear is pivotally disposed between the first planetary arm and the second planetary arm, and the plurality of first planetary gears mesh with the first sun gear, and the plurality of second planetary gears are pivoted at the first Between the two planet arms and the third planet arm, and the plurality of second planet gears mesh with the second sun gear, the third clutch ring is sleeved on a side of the third planet arm that is close to the output side, a third clutch is engaged with the hub ratchet surface; and a third shifting unit disposed inside the hub of the hub unit and associated with the sleeve body, the transmission shifting unit, and the second shifting unit Linking, the third shifting unit includes a ring gear and a fourth clutch, the ring gear is located inside the hub and is wrapped on a side of the chain sleeve close to the speed control sleeve set, the sleeve body, the first Two shifting Outside the unit, the ring gear includes a one-way ratchet surface and a synchronous internal tooth surface, the one-way ratchet ring is recessed on the inner side wall of the ring gear adjacent to the input side, and the second clutch is engaged with the one-way ratchet The synchronous internal tooth surface ring is recessed on the inner side wall of the ring gear adjacent to the output side, and the synchronous internal tooth surface and the first planetary gear and the second planetary gear of the second shifting unit are meshed with each other. The four clutch is disposed on a ring side wall of the ring gear and located radially inward of the inner tooth surface of the hub, and the speed regulating flange abuts against the fourth clutch. The bicycle five-speed internal shifting mechanism according to claim 1, wherein the ring gear includes a plurality of perforations, and the plurality of perforations are radially spaced through the ring gear and correspond to the inner tooth surface of the hub of the hub. The four clutch includes a plurality of pins and a plurality of fourth pawls, and each of the fourth pawls is respectively disposed in a corresponding pinhole in combination with a pin. The bicycle five-speed internal shifting mechanism according to claim 2, wherein the spindle is provided with a receiving groove adjacent to the input side, and the speed regulating slider set includes a limiting washer and a speed regulating spring. The positional gasket is disposed in the accommodating groove, and the speed regulating spring is sleeved on the main shaft and one end thereof abuts against the limiting shims, and the other end abuts against the sliding block body. The bicycle five-speed internal shifting mechanism according to claim 3, wherein the aforementioned sprocket sleeve mechanism comprises a control spring sleeved on the main shaft and one end thereof abuts against the sleeve body. The bicycle five-speed internal shifting mechanism according to claim 4, wherein the sleeve body comprises a speed control chamber, wherein the speed control chamber has an opening facing the output side and forming an accommodation space in the speed control sleeve. The slider body is slidably received in a speed control chamber of the sleeve body. The bicycle five-speed internal shifting mechanism according to claim 5, wherein the spindle comprises a latching slot and a latching lever, and the latching slot is formed by a recessed radially inward of the side of the outer ring of the spindle, the latching slot Located between the accommodating groove and the output side, and close to the accommodating groove, the latching rod is disposed on the latching groove and the bottom surface thereof protrudes from the outer ring side of the main shaft, and the inner ring side of the slider body is radial A driving groove is formed in the outward recess, and the driving groove is located outside the latching slot, and the latching rod is clamped between the driving slot and the control slot. The bicycle five-speed internal shifting mechanism according to claim 6, wherein the spindle includes a control slot, a through hole, a control rod and a connecting rod, and the control slot extends radially through the spindle and is located in the receiving slot. Between the input sides, the through hole is axially penetrated from one end of the main shaft and penetrates from one end of the main shaft and communicates with the control slot. The control rod is transversely disposed in the control slot, so that the control rod can be The control slot is axially moved, and both ends of the control rod extend out of the control slot, and the connecting rod penetrates through the through hole and is provided with two ends, one end of the connecting rod is fixed to the control rod, The other end protrudes from the main shaft through the through hole, and the control rod and the sleeve body are fixed to each other, and the connecting rod can drive the sleeve body to move axially relative to the main shaft. The bicycle five-speed internal shifting mechanism according to claim 7, wherein each of the fourth pawls is a V-shaped pawl. The bicycle five-speed internal shifting mechanism according to any one of claims 1 to 8, wherein the first, second, and third clutches are both one-way pawl clutches, and the first clutch includes a plurality of first spines a claw and a first bundle ring, the second clutch includes a plurality of second pawls and a second bundle ring, each second pawl is buckled on the one-way ratchet face, and the third clutch includes a plurality of third spines a claw and a third bundle ring, each of the third pawls being buckled on the hub ratchet surface.