CN1041323A - The arrangement of clutch that is used for bicycle - Google Patents

Abstract

A kind of arrangement of clutch that is used to have the bicycle of the foot brake starter (8) that separates with chain drive-belt comprises with the pedal crank assembly first one-way clutch (7) that links to each other, moment of torsion is passed to brake starting device (8) when pedal crank throw backward rotation; When pedal crank throw forward rotation, moment of torsion is passed to second one-way clutch (43 of drive wheel; 64; 143) and with drive wheel link to each other, when the drive wheel backward rotation, utilize transfer device (30; 65; 130) make said first one-way clutch (7) or second one-way clutch (43; 64; 143) the 3rd one-way clutch of Tuo Kaiing; Slip clutch (35; 36; 67; 69; 135; 136) make that bigger rotation freedom is arranged when the 3rd one-way clutch meshes.

Description

The arrangement of clutch that is used for bicycle

The present invention relates to a kind of arrangement of clutch that is used for bicycle, this bicycle is equipped with the foot brake starter that can separate with chain drive-belt.This arrangement of clutch is made up of with second one-way clutch that links to each other with the bicycle driving wheel first one-way clutch that links to each other with the pedal crank throw, in order to moment of torsion is passed to the brake starting device, second one-way clutch passes to drive wheel with moment of torsion to first one-way clutch when pedal crank throw forward rotation when pedal crank throw backward rotation.

The existing intrinsic problem of existing such bicycle is, one-way clutch in the pedal crank assembly and drive wheel wheel hub have such engagement direction, when causing bicycle to move backward, when being the drive wheel backward rotation, the described chain that moves through backward passes to the pedal crank throw and further passes to the brake starting device, thereby the starting brake makes bicycle locked.

The invention provides such device, when the drive wheel backward rotation, this device can automatically brake inoperative.

Embodiments of the present invention is described in detail below in conjunction with accompanying drawing.

In the accompanying drawings:

Fig. 1 is the lateral plan that comprises the bicycle of pedal crank assembly, drive wheel and brake gear;

Fig. 2 is the cutaway view of Fig. 1 along A-A, comprises disengagement gear of the present invention;

Fig. 3 is the part sectional view of bicycle pedal crank assembly;

Fig. 4 is the cutaway view of Fig. 3 along D-D, has described brake starting device and disengagement gear;

Fig. 5 is the view that is arranged in the disengagement gear of the present invention of drive wheel wheel hub;

Fig. 6 is the cutaway view of Fig. 5 along A-A;

Fig. 7 is the cutaway view of Fig. 5 along B-B;

Fig. 8 is the longitudinal sectional view of the drive wheel wheel hub of one embodiment of the present of invention;

Fig. 9 is the cutaway view of Fig. 8 along E-E;

Figure 10 is the cutaway view of Fig. 8 along F-F;

Figure 11 is the longitudinal sectional view of the drive wheel wheel hub of another embodiment of the present invention;

Figure 12 is the cutaway view of Figure 11 along G-G;

Figure 13 is the lateral plan that comprises the bicycle of assembly, drive wheel and brake gear;

Figure 14 is the section-drawing of Figure 13 along A-A, comprises disengagement gear of the present invention;

Figure 15 is the part sectional view of the bicycle pedal crank assembly of another embodiment of the present invention;

Figure 16 is the cutaway view of Figure 14 along B-B;

Figure 17 is the cutaway view of Figure 15 along C-C;

Figure 18 is along the cutaway view of C-C among Figure 15 of another embodiment of the present invention.

Bicycle shown in Figure 1 comprises a pedal crank assembly, and one of them pedal crank shaft 2 effect axle journal is fixed with pedal arm and a sprocket wheel rigidly on this axle, and chain is connected with the bicycle driving wheel by this sprocket wheel.The pedal crank assembly comprises a brake starting device that utilizes steel wire 50 to link to each other with wheel rim brake 51.

But the brake starting device in the pedal crank assembly comprises the cover 1 that is fixed on the crank shaft 2 and surrounds cover 1 and via friction face 10 transmissions ground and latter's bonded assembly change 3, see Fig. 3.These friction faces 10 are cylindrical-conical, and utilize spring washer 9 force togethers, this spring washer to withstand on of pedal arm 5.The ratchet 4 that matches with ratchet 7 is arranged in the change 3, and described ratchet can be rotated to support on the ring 6, on the ring 6 radially-protruding actuating arm 8 is arranged successively, sees Fig. 4.

When pedal shaft rotated forward, ratchet 7 was thrown off with the ratchet 4 on the swivel eye 3.When pedal crank throw backward rotation, ratchet 7 and corresponding ratchet 4 engagements, thus make ring 6 backward rotation, and arm 8 is applied start-up operation, arm 8 is connected with wheel rim brake 51 by steel wire 50.When too high brake starting power acts on the pedal crank throw, will produce between the friction face 10 and slide in case the locking apparatus overload.

Overlapping an eseparation ring 11 that utilizes steel wire 14 to link to each other on ring 6 the excircle with starting device on the drive wheel, on the ring 11 groove 12 is arranged, when ring 11 is in dead position, this groove is positioned at the outside of ratchet 7 just, when disengagement gear is started, steel wire 14 makes ring 11 rotations, so a limit 13 of groove 12 will contact with ratchet 7 and make it to rotate, thereby make brake starting geared assembly inoperative, like this, when the drive wheel backward rotation, prevent brake gear-wheel rim brake 51 startings and the pinning bicycle.

In order to realize the separation of above-mentioned brake starting device, subsidiary one-way clutch is housed on the drive wheel wheel hub, this device is arranged on the ratchet 21 between ring on the wheel hub 20 and starter ring 23, sees Fig. 1 and Fig. 2.Starter ring 23 utilizes friction engaging and disengaging gear 25,26 to link to each other with steel wire actuating arm 28.When the drive wheel backward rotation, ratchet 21 makes ring 20 be connected securely with starter ring 23, thereby actuating arm 28 is moved backward, and makes ring 11 rotations and then make ratchet 7 disengagements in the pedal crank assembly by steel wire 14.In order to make drive wheel that more counter motion be arranged, friction engaging and disengaging gear 25,26 will allow actuating arm 28 to slide with respect to starter ring 23.

According to the abovementioned embodiments of the present invention, this bicycle comprises an one-way clutch that links with drive wheel, and this device utilizes a starting device to make the brake starting device in the pedal crank assembly inoperative.In one embodiment of the present of invention shown in Fig. 5,6 and 7, disengagement gear is arranged in the drive wheel wheel hub, and it makes the one-way clutch of drive wheel inoperative, and described arrangement of clutch can pass to drive wheel from sprocket wheel with propulsive effort.In the embodiment shown in fig. 5, the disengagement gear that is positioned on the drive wheel wheel hub comprises that is fixed on an axle 29 not rotatable on the bicycle, on drive wheel, be fixed with wheel hub sleeve 42, surface bearing the actuating sleeve 44 that is enclosed within on the ball bearing of main shaft outside it, is fixed with the different sprocket wheel of some sizes 40 on actuating sleeve 44.The actuating sleeve 44 that rotatably is enclosed within on the wheel hub sleeve 42 will pass on the wheel by ratchet 43 from the propulsive effort of chain and sprocket wheel 44, and these ratchets form the one-way clutch between actuating sleeve 44 and the wheel hub sleeve 42.

For the contact that makes the brake starting device in wheel and the pedal crank assembly disconnects, thereby when avoiding the bicycle counter motion by locked, this embodiment of the present invention comprises in the drive wheel wheel hub for making ratchet 43 out-of-action disengagement gears, for this reason, separation sleeve 30 is positioned at wheel hub sleeve 42, being used for when wheel moves backward ratchet 43 being moved to out-of-action position, is to be finished by ratchet 32 and the ring gear 33 that is enclosed within on the turning set 34 not as mentioned above.Ratchet 32 and ring gear 33 forms the 3rd one-way clutch, in this device and the pedal crank assembly and actuating sleeve 44 and the one-way clutch of taking turns between the hub sleeve 42 have identical engagement direction.Ring gear 33 utilizes friction engaging and disengaging gear 35,36 to be installed in not on the turning set 34, make ring gear 33 can wheel continue skid in the motion backward, as shown in Figure 6, have on the separation sleeve 30 when bicycle normally moves for ratchet 43 to put in wherein opening 30a.When backward rotation and overlap 30 when being pinned by ratchet 32, cover 30 will force ratchet 43 to come out from opening 30a, thereby the ratchet 43 and the engagement of actuating sleeve 44 are thrown off.The circumferential size of opening 30a makes between cover 30 and the ratchet 43 to have rotary gap greater than ratchet 43, and this gap lags behind the disengagement of ratchet 43.The return movement of cover 30 is guaranteed by torsion spring 31.

For preventing that any type of loading making ratchet 43 disengagements more difficult on the ratchet 43 and under the effect of cover 30, except gapped 46, can be rotated the engagement ring 39 of pinning with respect to pawl 43 on the actuating sleeve in addition, see Fig. 7.For guaranteeing that this gap provides freely rotating to a certain degree to ring 39 when wheel begins counter motion, guaranteeing that the gap is facing to the springs 47 that make ring 39 rotations are housed on the direction of actuating sleeve 44.Bicycle was by locked when the running clearance between ring 39 and the actuating sleeve 44 also can prevent sudden stop.Because the elasticity of brake weight transfer device.Running clearance is used to prevent made 43 engagements of driving ratchet before brake is removed.

In the above embodiment of the present invention, described to making two disposable positions of out-of-action the 3rd one-way clutch of other one-way clutchs, at this, other one-way clutchs are meant in the pedal crank assembly or the one-way clutch in the drive wheel wheel hub, wherein also be equipped with disengagement gear with prevent bicycle in long counter motion by locked.

Be an interchangeable embodiment of the present invention shown in Fig. 8,9 and 10, wherein disengagement gear is used for making and driving torque can be thrown off from the drive wheel one-way clutch that sprocket wheel passes on the wheel in the drive wheel wheel hub.In the embodiment shown in fig. 8, disengagement gear comprises and is fixed on the cycle frame not turning cylinder 60.Wheel hub sleeve 61 is fixed on the drive wheel, and utilizes the ball bearing of main shaft on the actuating sleeve 63 to rotate.Cover 63 utilizes two ball bearing of main shafts to rotate on axle 60 successively, and drives the sprocket wheel 62 of different size.Actuating sleeve 63 is set is the ratchet 64 that is used for by the one-way clutch that constituted between actuating sleeve 63 and the wheel hub sleeve 61 passes to power on the wheel from chain and sprocket wheel 62.

For the brake starting device in drive wheel and the pedal crank assembly is disconnected, and prevent bicycle when counter motion by locked, this embodiment of the present invention comprises makes ratchet 64 out-of-action devices in the drive wheel wheel hub.For this reason, in wheel hub sleeve 61, be equipped with and separate tooth cover 65, this tooth cover is when the wheel backward rotation, via ratchet 66 and pawl-bearing ring 67 ratchet 64 is moved on to stop position, ratchet 66 and tooth cover 65 form the 3rd one-way clutch, pawl-bearing ring 67 utilization can be at the long friction engaging and disengaging gear that slide in apart from counter motion on turning set 71 not, friction engaging and disengaging gear comprises pawl-bearing ring 67, be fixed on the ring 69 on the axle 60 and be used for pawl-bearing ring 67 and ring 69 coarctate springs 72, spring 72 is by cover 68 axial location, as shown in Figure 9.Make ratchet 64 out-of-action inclined-plane 65a when bicycle normally moves on the tooth cover 65, tooth cover 65 remains on its disengaged position by preloading spring 75.When counter motion and tooth cover 65 and ratchet 66 when being meshing with each other, tooth cover 65 will force ratchet 64 to move up along inclined-plane 65a and make itself and actuating sleeve 63 disengagements.

In order to prevent that loading from making it be subjected to tooth cover 65 to be difficult to throw off as the time spent on ratchet 64, on actuating sleeve 63, stride across gap 73 and can be with engagement ring 70 drivingly, see Figure 10.Engagement ring 70 has free running clearance to a certain degree when guaranteeing that wheel begins counter motion, is provided with a spring 76 that engagement ring 70 is rotated, to guarantee its above-mentioned gap with respect to actuating sleeve 63.Should also can be used as the safety device of locked bicycle when preventing sudden stop at the running clearance between ring 70 and the actuating sleeve 63.Because the elasticity of brake weight transfer device, this running clearance are used to prevent brake and remove ratchet 64 engagements before.

Shown in Figure 11 and 12 is an alternative embodiment of the invention, and the disengagement gear that is positioned at the drive wheel sprocket wheel is used to make and bicycle driving power is passed to the unidirectional of drive wheel from sprocket wheel throws off from device.According to this embodiment of the invention, this device comprises the not turning cylinder 129 that is fixed on the cycle frame, be fixed with cover 142 on the drive wheel, be contained on the ball bearing of main shaft that overlaps 142 outsides actuating sleeve 144 is housed, sprocket wheel 140 is housed on the actuating sleeve 144 un-rotatably, be contained in the actuating sleeve 144 of wheel on the hub sleeve 142 rotationally and be used to utilize the ratchet 143 of the one-way clutch between actuating sleeve 144 and wheel hub sleeve 142, propulsive effort is passed on the wheel from sprocket wheel 140.Throw off in order to make the brake starting device in drive wheel and the crank assembly, thereby prevent bicycle in counter motion by locked, in the wheel hub sleeve 142 separation sleeve 130 is housed rotationally, by ratchet 132 and the ring gear 133 that is contained on the separation sleeve 130, when the wheel backward rotation, the latter moves on to out-of-action position with ratchet 143, and ratchet 132 and ring gear 133 form the 3rd one-way clutch.Separation sleeve 130 with inclined-plane is equipped with the axial motion of finishing separation sleeve 130 mutually with the ring 150 that has the inclined-plane, and ring 150 utilizes friction engaging and disengaging gear 135,136 that it is rotated, and this arrangement of clutch allows ring 150 to slide in long counter motion.

As shown in figure 12, separation sleeve 130 is included in the tapered segment 130a that does not influence ratchet 143 when bicycle normally moves and remained on inoperative position by preloading spring 131, when backward rotation and separation sleeve 130 during by ratchet 132 startings, separation sleeve 130 will be rotated, simultaneously, utilize the inclined-plane on the cover 130 cooperating of respective ramp it to be moved axially with encircling on 150.Thereby, make to drive ratchet 143 and actuating sleeve 144 disengagements.

In drive wheel wheel hub shown in Figure 11, comprise the 4th one-way clutch, its objective is starting separation sleeve 130 when brake, to prevent locked bicycle and to keep it.This one-way clutch comprises sleeve 148, and the engagement ring 139 of ratchet 155 is housed in this sleeve, and groove 146 is arranged on the sleeve 148, and with the gap that provides engagement ring 139 to rotate, spring 147 is used for keeping this gap when the bicycle normal operation.

Bicycle shown in Figure 13 comprises the pedal crank assembly, and pedal crank shaft 2 is housed in the assembly, is fixed with pedal arm and sprocket wheel on this axle, by this sprocket wheel chain is linked to each other with the bicycle driving wheel.The pedal crank assembly also comprises the brake starting device that utilizes steel wire 50 to link to each other with wheel rim brake 51.

Brake starting device in the pedal crank assembly comprises the sleeve 201 that is fixed on the crank shaft 2, and sleeves 201 are surrounded in change 203, but and link to each other by friction face 210 the two transmissions ground, see Figure 14.These cylindrical-conical friction faces 210 utilize spring washer 209 force togethers that withstand on the setting nut 214, having ratchet 204 in the change 203 cooperates with ratchet 207, ratchet 207 is rotatably supported on the ring 206, have radially-protruding actuating arm 8 on this ring, arm 8 is connected to wheel rim brake 51 successively.

When pedal shaft rotated forward, ratchet 207 was thrown off from the ratchet 204 in the change 203, and the two keeps breaking away from.When pedal crank throw backward rotation, thereby ratchet 207 will make ring 206 backward rotation with corresponding ratchet 204 engagements, and make arm 8 produce a starting motion.When the brake starting power on acting on the pedal crank throw is excessive, can produces between the friction face 210 and slide, to prevent this device overload.

Have one-way clutch between pedal shaft 2 and sprocket wheel 240, described sprocket wheel links to each other with bicycle rear by chain in normal way.One-way clutch in the pedal crank assembly comprises the cover 242 that is contained in un-rotatably on the pedal shaft 2, the sprocket wheel that has actuating sleeve 244 at its excircle upper support, cover 244 is contained on the cover 242 by ball bearing of main shaft, and by with the engagement of ratchet 243 propulsive effort being passed to sprocket wheel from pedal shaft 2, the one-way clutch that ratchet 243 constitutes between axle sleeve 242 and the actuating sleeve 244.

According to the present invention, for the disconnection of getting in touch between the trailing wheel that makes bicycle and the brake starting device in the pedal crank assembly, so that when preventing the bicycle counter motion by locked, have in the pedal crank assembly ratchet is mentioned the device that makes it de-mesh, for this reason, rotatably support has separation sleeve 230 on actuating sleeve 244, ring gear is arranged on it, this ring gear with can be bearing in the ratchet 232 of ring on 233 with fascinating and match, ring 233 rotatably is contained in to have Tu Yuan And and is fixed on the cover 250 on the vehicle frame, when causing actuating sleeve 244 backward rotation, ratchet 243 is thrown off with convenient bicycle counter motion.

Ring gear on ratchet 232 and the separation sleeve 230 forms the 4th one-way clutch, one-way clutch in this device and the rear wheel hub, the driving arrangement of clutch 242-244 in the pedal crank assembly have identical engagement direction, the ring 233 that has ratchet 232 links to each other with the cover of fixing that has flange 250 by friction engaging and disengaging gear, and friction engaging and disengaging gear can slide in long counter motion.Friction engaging and disengaging gear comprises one or more set screw 221, and spring 220 and friction element 219 are all arranged on each screw, and these screws 221 are by the tapped bore on the ring 233 and the outside face friction engagement of flanged cover 250.

As shown in figure 16, have groove 230a on the separation sleeve 230, when bicycle travelled forward normally, the sponson of ratchet 243 inserted in these grooves.When sprocket wheel and actuating sleeve 244 backward rotation, separation sleeve 230 is pinned and forces ratchet 243 to come out from groove 230a by ratchet 232, thereby cover 230 and actuating sleeve 244 are thrown off.

In order to prevent that thereby any loading from making it to be difficult to throw off on ratchet 243, on the cover 242 ring gear 239 is housed, one running clearance is arranged between them, and link to each other rotationally, this gap is formed by overhanging tooth 246 long and narrow on the cover 242 and the quite wide groove 246a of ring gear inside face that is positioned at that matches with it, sees Figure 17.For guaranteeing above-mentioned gap, ring gear 239 can have a certain amount of lost motion when wheel begins counter motion, makes ring 239 towards the direction deflection that can produce a gap with cover 242 by spring 247, and this running clearance also guarantees locked bicycle when real sudden stop.Equally, because the elasticity of brake weight transfer device, running clearance is in order to prevent ratchet 243 engagement once more before removing brake.

That shown in Figure 180 is another embodiment of the present invention, is contained in ratchet 248 in the actuating sleeve 244 and has with respect to driving the opposite engagement direction of ratchet 243, and mesh when pedal crank throw backward rotation.When the pedal crank throw continues counter motion, drive ratchet 243 and throw off (as mentioned above), and because the rotation of separation sleeve 230 further produces the gap, its advantage is that running clearance can reduce, like this, the idle running of at every turn having a rest in riding forward when restarting to step after (not pedaling pedal) can diminish, and reason is that extra gap is only just arranged when brake.Utilize such structure, just might control corresponding engagement salient on the ratchet 243 after the brake better.Behind the sudden stop, this gap is identical when stepping again.

Embodiments of the invention are not subjected to the restriction of above-mentioned example, and can change within the scope of the claims.

Claims (3)

1, is used to have the arrangement of clutch of the bicycle of the foot brake starter (8) that separates with chain drive-belt, comprises first one-way clutch (7) that links to each other with the pedal crank assembly and second one-way clutch (43 that links to each other with the bicycle drive wheel; 64; 143); Described device (7) passes to moment of torsion brake starting device (8), institute's art device (43 when pedal crank assembly backward rotation; 64; 143) when the pedal crank assembly rotates forward, moment of torsion is passed to drive wheel; It is characterized in that the 3rd one-way clutch (32 that links to each other with bicycle driving device; 66; 132); The transfer device (23 that links to each other and when bicycle driving wheel backward rotation, start with said the 3rd one-way clutch by this arrangement of clutch; 30; 65; 130); Said transfer device is used for preventing selectively said first one-way clutch (7) or said second one-way clutch (43; 64; 143) at said the 3rd one-way clutch (21 of starting; 32; 66; 132) the engagement time.

2, device according to claim 1, wherein said transfer device (23; 30; 65; 130) be used for to said second one-way clutch (43; 64; 143) apply effect and prevent its engagement.

3, device according to claim 2 is characterized in that having slip clutch (35; 36; 67; 69; 135; 136) be restricted with the counter motion that prevents bicycle.

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