CN2622474Y - Three single-direction bearing - Google Patents

Abstract

A three single-direction bearing includes a mandrel, an inner sleeve cased in the outside of the mandrel, an outer sleeve cased in the outside of the inner sleeve, a first and a second single-direction backstop device arranged respectively between the mandrel and the inner sleeve as well as between the inner and outer sleeves. The first single-direction backstop device includes a first and a second interfering element respectively arranged on the mandrel and the inner sleeve, and the second single-direction backstop device includes a third and a forth interfering element respectively arranged on the inner and outer sleeves. The first and third interfering elements are provided with a ring surface respectively surrounding the mandrel and the outside of the inner sleeve, at least one chock block arranged on the ring surface, and an elastomer which makes the chock block elastically and contractedly protrude on the ring surface. The second and fourth interfering elements are a plurality of ratchets which are respectively arranged continually in a ring on the inner and outer sleeves at the ring surface position. The ratchets form a backstop surface in the radial direction and an incline guiding surface, thereby the three single-direction bearing can connect two different torsion inputting devices and output the single direction torsion respectively and independently. The utility model has a small size which is easily arranged on the existing bicycle frame.

Description

Three unilateral bearings

Technical field

The utility model relates to a kind of bearing, particularly a kind of three unilateral bearings.

Background technique

Because the idea day of healthy leisure contains, so bicycle light, CRUX and free of contamination characteristic can be provided, make it gradually for popularizing, and power-actuated bicycle can be provided, more can make bicycle more easy and convenient in the face of different terrain or when distance movable arranged slightly and have elasticity in the use.

Yet, structure with present electric bicycle, though manpower foot-driven part is identical with general bicycle, all be to utilize one to be located at crank on the five-way pipe of bicycle frame foot-operated and drive chain drum and rotate for the user, be positioned at rear tooth disk on the rear axle and chain drum drives a chain with transmission, and establish the centre of a unilateral bearing, when crank reverses at rear tooth disk and rear axle, rear tooth disk is thrown off the drive connection of trailing wheel, just unlikely reverse drive trailing wheel and damage the bearing of trailing wheel.On the other hand, power-actuated part then is to utilize a motor driven chain drum, drives fluted disc driving trailing wheel with chain equally and advances.

Under normal operating condition, between crank and the trailing wheel because of being provided with non-return device, can avoid rear tooth disk to force trailing wheel to reverse and damage, and force the crank rotation when avoiding motor running, crank does not need along with rotation when being provided with a unilateral bearing between crank and the chain drum yet and making motor drive chain drum.Yet, crank and motor then produce meaningless annexation between two parties because of operating of chain drum, so when crank is just driving trailing wheel and is advancing, not only needing to activate trailing wheel when the user tramples rotates, also need to promote the motor rotation of unpowered output in addition, the muscle power waste that causes the user to drive significantly reduces the wish of trampling.

For solving above-mentioned crank and motor interactional shortcoming in transmission, wherein a kind of mode is that people's force transmission mechanism is separated with electric drive mechanism, make its separately respectively with trailing wheel interlock (some design is to make the direct transmission front-wheel of power driving mechanism), but this kind practice will increase the complexity of bicycle structure, difficult on not only making, relatively cost will significantly increase.And another mode then is to increase by one the 3rd reverse release between crank and motor again, makes crank and motor can break away from annexation when rotating in the opposite direction each other.But with present finding, its common drawback is textural too complicated and huge, except the necessary special design of the five-way pipe of vehicle frame, more cause the inconvenience of installing, still cost is not too high, increase to make the difficulty in the assembling yet, more causes bicycle whole heavy and do not beg for Consumer's favor.

The model utility content

The purpose of this utility model is to provide a kind of three unilateral bearings, and it can connect two kinds of different torsion input devices, and independently of one another folk prescription to outputting torsion, volume is little and easily be installed on the existing bicycle frame.

Three unilateral bearings of the present utility model comprise: an axle, a cover overlay on the outer inner sleeve with outputting torsion of described axle, a cover and overlay on the outer outer sleeve, of described inner sleeve and be located at described axle and be located at described inner sleeve and the second middle unidirectional backstop of described outer sleeve with the first unidirectional backstop and in the middle of the described inner sleeve, and be characterized in: described axle is driven by one first torsion input device with an imaginary shaft axis; Described inner sleeve also is to overlap rotationally with described imaginary shaft axis to overlay on outside the described axle; Described outer sleeve is can described relatively inner sleeve to overlap rotatably with described imaginary shaft axis to overlay on outside the described inner sleeve, and described outer sleeve and be subjected to the driving of one second torsion input device; The described first unidirectional backstop comprises: one along with described axle is located at first interference element on the described axle synchronously rotationally, and one contacts with described first interference element and along with described inner sleeve is located at second interference element on the described inner sleeve synchronously rotationally; The described second unidirectional backstop comprises: one along with described inner sleeve is located at the 3rd interference element on the described inner sleeve synchronously rotatably, and one contacts with described the 3rd interference unit and along with described outer sleeve is located at the 4th interference element on the described outer sleeve synchronously rotationally.Wherein, first interference element of the described first unidirectional backstop has: one gives prominence to the elastomer at described ring surface with described imaginary shaft axis around ring surface, at least one block and that is positioned on the described ring surface of described axle outside with making described block elastic shrinkage, described second interference element then is a plurality of continuously arranged ringwise ratchets in described ring surface position and on described inner sleeve relatively, and described ratchet is formed with a radially stopping surface and that extends to described imaginary direction of axis line and follows the tilted guide surface that the sense of rotation tangent line extends.The 3rd interference element of the described second unidirectional backstop has: one gives prominence to the elastomer at described ring surface with described imaginary shaft axis around ring surface, at least one block and that is positioned on the described ring surface of described inner sleeve outside with making described block elastic shrinkage, described the 4th interference element then is a plurality of continuously arranged ringwise ratchets in described ring surface position and on described outer sleeve relatively, and described ratchet is formed with a radially stopping surface and that extends to described imaginary direction of axis line and follows the tilted guide surface that the sense of rotation tangent line extends.

For further specifying above-mentioned purpose of the present utility model, structural feature and effect, the utility model is described in detail below with reference to accompanying drawing.

Description of drawings

Fig. 1 is the combination cross-sectional schematic of a preferred embodiment of three unilateral bearings of the present utility model.

Fig. 2 is the partial component assembled configuration schematic representation of this preferred embodiment, and it shows one first unidirectional backstop and one second unidirectional backstop is applied in the middle of an axle, an inner sleeve and the outer sleeve.

Fig. 3 is the front view of Fig. 2.

Fig. 4 is the partial schematic sectional view of first interference element of this first unidirectional backstop, but it shows the structure of its elastic shrinkage.

Fig. 5 is that the dual-purpose actuator of bicycle of this three unilateral bearing of use is applied in the schematic appearance on the bicycle.

Fig. 6 is the combination cross-sectional schematic of the dual-purpose actuator of bicycle of this three unilateral bearing of application.

Embodiment

Consult Fig. 1, three unilateral bearings 1 of the present utility model are to be applied in to connect two kinds of different torsion input devices simultaneously, and can a specific sense of rotation outputting torsion.One preferred embodiment of this three unilateral bearing 1 comprises an axle 11, an inner sleeve 12, an outer sleeve 13, one first unidirectional backstop 14 and one second unidirectional backstop 15.

Wherein, axle 11 is to be subjected to the driving of a torsion input device wherein and to rotate with an imaginary shaft axis 10.Inner sleeve 12 covers overlay on axle 11 outsides, and also phase center roller 10 rotates with this imagination shaft axis 10 but make inner sleeve.13 of outer sleeves are that cover overlays on inner sleeve 12 outsides, and outer sleeve 13 is also with these imagination shaft axis 10 relative inner sleeve 12 rotations.Outer sleeve 13 can be subjected to the driving of another torsion input device and rotate.

Remerge with reference to Fig. 2 and Fig. 3, the first unidirectional backstop 14 comprise one be located on axle 11 outer rims, with first interference element of axle 11 rotations, and second interference element that is located on inner sleeve 12 inner edge surfaces with inner sleeve 12 rotations.In this example, first interference element is the ring surface 141 that forms on axle 11 along imaginary shaft axis 10 around axle 11, and be provided with four holding parts that cave inward 1411 on the ring surface 141 with being evenly distributed, be provided with a fluting 1412 by each holding part 1411 along ring surface 141, in 1411 of each holding parts are seated in for a block 142 respectively, and each block 142 has a bottom 1421 and one and bottom 1421 rightabout teats 1422 that is positioned at holding part 1411, then has on the teat 1422 to cooperate fluting 1412 trends and form the grooving 1423 that inwardly concaves.In addition, be provided with the elastomer 143 of a formation annular beam spring, making elastomer 143 just can restraint hoop also can be by the grooving 1423 of each block 142 in the fluting 1412 of ring surface 141, borrow elastomer 143 each block 142 is positioned in the corresponding holding part 1411, elastomer 143 also can impose a strength of inwardly oppressing to each block 142 simultaneously.And as shown in Figure 4, because the bottom 1421 of block 142 can form a fulcrum (black triangle indication place on the figure) with the point of contact of holding part 1411, and the force position of elastomer 143 compressing blocks 142 just is positioned at the opposite both sides of fulcrum with teat 1422, therefore make behind each block 142 pressurized that with fulcrum be after a side of middle mind-set elastomer 143 active forces is rotated, but cause outside the outstanding relatively ring property face 141 in teat 1422 elastic shrinkage ground of block 142.In addition, second interference element is a plurality of ratchets 144 that continuous circular shape is arranged that are on inner sleeve 12 inner edge surfaces in ring surface 141 positions relatively, each ratchet 144 1 side is formed with a radially stopping surface 1441 to this imagination shaft axis 10 directions extension, and the opposite side of ratchet 144 then forms and following the tilted guide surface 1442 that this specific sense of rotation tangent direction is extended without exception.Make block 142 to be in contact with one another with ratchet 144.

This second unidirectional backstop 15 comprises that one is located at the 3rd interference element that rotates with inner sleeve 12 on inner sleeve 12 outer rims, and one is located at the 4th interference element that rotates with outer sleeve 13 on outer sleeve 13 inner edges.In this example, the 3rd interference element is to adopt and the first interference element identical construction, make the 3rd interference element also have a ring surface 151, four blocks 152 and an elastomer 153, the 4th interference element then adopts the ratchet 154 that forms a plurality of annular array with the second interference element identical construction, since herein the radially stopping surface 1541 of the 3rd interference element and the 4th interference element bearing of trend that protrudes ring surfaces 151 except the teat 1522 of block 152 and ratchet 154 and tilted guide surface 1542 directions just and aforementioned opposite, all the other structures and assembling mode are all identical with second interference element with first interference element, so at this i.e. repeated description no longer.

Please consult Fig. 3 again, during application, when axle 11 when rotating as the figure clockwise direction, teat 1422 bit points of the block 142 of first interference element will be replaced the radially stopping surface 1441 of the ratchet 144 of second interference element, and since the shape of block 142 with and the relation of movement direction will form the interference effect of mutual clamping stagnation with stopping surface 1441 radially, rotate in a clockwise direction so axle 11 can drive inner sleeve 12 synchronously.On the contrary, when axle 11 is rotated with counter clockwise direction, the teat 1422 of block 142 will contact with the tilted guide surface 1442 of ratchet 144, and because of the relation of block 142 movement directions, teat 1422 will be subjected to the compressing of tilted guide surface 1442 and in the holding part 1411 of the nearly ring surface 141 of interior reducer coupling relatively, make block 142 can pass through each ratchet 144, thus axle 11 when rotating counterclockwise and inner sleeve 12 continuous action relation does not take place.By the first unidirectional backstop 14, can make axle 11 uniaxially specific sense of rotation in a clockwise direction to drive inner sleeve 12 rotations.

In addition, when outer sleeve 13 as Fig. 3 in clockwise direction when rotating, the block 152 that the radially stopping surface 1541 of the ratchet 154 of the 4th interference element will be replaced the 3rd interference element forms interferes, and rotates in a clockwise direction and make outer sleeve 13 drive inner sleeves 12 synchronously.On the contrary, when outer sleeve 13 when counterclockwise rotating, tilted guide surface 1542 contacts of ratchet 154 also compressing block 152 are contracted in holding part 1511, make ratchet 154 can pass through each block 152, thus make outer sleeve 13 with inner sleeve 12 relative idle running interlock not.By the second unidirectional backstop 15, can make outer sleeve 13 uniaxially specific sense of rotation in a clockwise direction drive inner sleeve 12 rotations.

In addition, when driving inner sleeve 12, axle 11 rotates in a clockwise direction, and outer sleeve 13 is static or during with the counter clockwise direction backward rotation, be relative to inner sleeve 12 to be counterclockwise rotate because of outer sleeve 13 this moment, so borrow the effect of the second unidirectional backstop 15, outer sleeve 13 is the phenomenons that dally each other with inner sleeve 12, so outer sleeve 13 backward rotation, center roller 11 drives the effect of inner sleeve 12 rotations less than influence.Reverse side, when driving inner sleeve 12, outer sleeve 13 rotates in a clockwise direction, and axle 11 is static or during with the counter clockwise direction backward rotation, be relative to inner sleeve 12 to be counterclockwise rotate because of axle 11 this moment, so borrow the effect of the first unidirectional backstop 14, axle 11 also is the phenomenon that dallies each other with inner sleeve 12, so axle 11 backward rotation, the effect that outer sleeve 13 is driven inner sleeve 12 rotations also is not influence.Therefore, for whole three unilateral bearings 1, axle 11 can be subjected to the driving of different torsion input devices individually with outer sleeve 13 and rotate, but can only drive inner sleeve 12 with specific sense of rotation rotates, and when axle 11 (or outer sleeve 13) drives inner sleeve 12 rotations with this specific direction, the then relative and inner sleeve 12 disengaging annexations of outer sleeve 13 (or axle 11), therefore different torsion input devices is being independently can not influence each other as the time spent.

Utilize the characteristic of above-mentioned three unilateral bearings 1 it can be applied on the actuator of an electric bicycle.

As Fig. 5, bicycle has the transmission device 7 that a vehicle frame 4, a front-wheel 5, a trailing wheel 6 and a driving trailing wheel 6 rotate.Transmission device 7 generally comprises the chain 73 that a chain drum 71, is positioned at fluted disc 72 on trailing wheel 6 wheel shafts and an interlock chain drum 71 and fluted disc 72.Wherein, actuator comprises a manpower driver element 2, an electric drive unit 3 and aforesaid three unilateral bearings.Make actuator be positioned on the First Five-Year Plan siphunculus 41 of vehicle frame 4.Wherein, manpower driver element 2 has the corresponding respectively pedal 22 that is connected crank 21 ends of two cranks 21 and two, and 3 of electric drive unit have the gear train of a motor 31 and an interlock motor 31 running shafts.

Consult Fig. 6, the axle 11 of three unilateral bearings 1 is to be located in five-way pipe 41 (see figure 5)s, make the opposite end of axle 11 distinguish the end of connecting crank 21, so the user can borrow double-legged pushes pedals to make crank 21 drive axle 11 and rotate, one side of inner sleeve 12 is then in order to affixed chain drum 71, make chain drum 71 to rotate synchronously with inner sleeve 12, gear train 32 then has one and is fixed in outer sleeve 13 outside first gears 321 that rotate synchronously with outer sleeve 13,321 second gear 322 engagements less of first gear with a size, be provided with first bevel gear 323 of one and second gear, 322 coaxial rotation in addition, first bevel gear 323 then is meshed with second bevel gear 324 that is connected on motor 31 running shafts, by first gear 321, second gear 322, the configuration of first bevel gear 323 and second bevel gear 324, make the direction of motor 31 running shafts axially roughly be vertical with axle 11, can therefore avoid motor 31 laterally to put shared space, certainly, the configuration of gear train 32 is not necessarily not as shown in the figure, visual practical situations change design.

During use, axle 11 can be by manpower driver element 2 input torsion on the direction that trailing wheel 6 is advanced folk prescription drive inner sleeve 12 to ground and rotate, relending chain drum 71 drive trailing wheels 6 advances, outer sleeve 13 then can drive inner sleeve 12 at the equidirectional folk prescription to ground by electric drive unit 3 input torsion and rotate, and borrows chain drum 71 to drive trailing wheel 6 and advances.And as described above, the characteristic that is independent of each other during because of outer sleeve 13 and axle 11 reverse rotation, when electric drive unit 3 driving trailing wheels 6 advance, when even the reverse pushes pedals 22 of rider causes crank 21 counter-rotatings, also not can as electric bicycle structure can reduce the efficient of electric drive unit output, and when trampling separately, more can not drive motor generating and waste muscle power for no reason.

Because three unilateral bearings, 1 structure of the present utility model is quite simplified, the axle 11 length only sky axle than general bicycle five-way pipe are slightly long, therefore, as long as increase the length of 5mm at the five-way pipe of general bicycle, can easily dual-purpose actuator of the present utility model be installed on original body frame structure for automotive, make general bicycle can arrange in pairs or groups electric motor immediately and form electric bicycle with electric drive function, do not needing significantly to change under the structure of bicycle, the utility model also has the easy-on characteristic, has significantly reduced the cost of electric bicycle on making.

Certainly, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claims the above embodiment's variation, modification.

Claims (2)

1. unilateral bearing, comprise: an axle, a cover overlay on the outer inner sleeve with outputting torsion of described axle, a cover and overlay on the outer outer sleeve, of described inner sleeve and be located at described axle and be located at described inner sleeve and the second middle unidirectional backstop of described outer sleeve with the first unidirectional backstop and in the middle of the described inner sleeve, it is characterized in that:

Described axle is driven by one first torsion input device with an imaginary shaft axis;

Described inner sleeve also is to overlap rotationally with described imaginary shaft axis to overlay on outside the described axle;

Described outer sleeve is can described relatively inner sleeve to overlap rotatably with described imaginary shaft axis to overlay on outside the described inner sleeve, and described outer sleeve and be subjected to the driving of one second torsion input device;

The described first unidirectional backstop comprises: one along with described axle is located at first interference element on the described axle synchronously rotationally, and one contacts with described first interference element and along with described inner sleeve is located at second interference element on the described inner sleeve synchronously rotationally;

The described second unidirectional backstop comprises: one along with described inner sleeve is located at the 3rd interference element on the described inner sleeve synchronously rotatably, and one contacts with described the 3rd interference unit and along with described outer sleeve is located at the 4th interference element on the described outer sleeve synchronously rotationally;

First interference element of the described first unidirectional backstop has: one gives prominence to the elastomer at described ring surface with described imaginary shaft axis around ring surface, at least one block and that is positioned on the described ring surface of described axle outside with making described block elastic shrinkage, described second interference element then is a plurality of continuously arranged ringwise ratchets in described ring surface position and on described inner sleeve relatively, and described ratchet is formed with a radially stopping surface and that extends to described imaginary direction of axis line and follows the tilted guide surface that the sense of rotation tangent line extends;

The 3rd interference element of the described second unidirectional backstop has: one gives prominence to the elastomer at described ring surface with described imaginary shaft axis around ring surface, at least one block and that is positioned on the described ring surface of described inner sleeve outside with making described block elastic shrinkage, described the 4th interference element then is a plurality of continuously arranged ringwise ratchets in described ring surface position and on described outer sleeve relatively, and described ratchet is formed with a radially stopping surface and that extends to described imaginary direction of axis line and follows the tilted guide surface that the sense of rotation tangent line extends.

2. three unilateral bearings as claimed in claim 1 is characterized in that:

Described ring surface is provided with at least one holding part that holds described corresponding block and around described ring surface and the fluting by described holding part, described block then has: the bottom of the described holding part of a contact, one with the grooving of the rightabout teat in described bottom and by described teat, described elastomer then is that one to be set in the fluting of described ring surface interior and oppress the annular beam spring that described block is positioned at the holding part of described correspondence.

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