CN207687221U - Combined type freewheel clutch - Google Patents

Abstract

Combined type freewheel clutch, including main overrunning clutch and auxiliary overrunning clutch, it uses ratchet and pawl as main clutch transmission, to improve load-carrying ability and the circumferential size of ratchet is reduced with more pawls, using other types of overrunning clutch as auxiliary, stroke is coordinated to convert enlarger simultaneously, engage lead-in chamfered, guide's pawl, avoid gap, the use of the multiple technologies means such as buffer gear, it is worn mitigating, extend the service life, eliminate conflict, slow down impact, control sensitivity, transmission accuracy, engage orientation angles limitation, all various aspects such as application range have also been achieved new progress.

Description

Combined type freewheel clutch

Technical field

The utility model provides a kind of freewheel clutch.

Background technology

Freewheel clutch mainly has frictional, engagement type two major classes at present.Frictionally generally made with ball, cylinder, voussoir For locking element, have the shortcomings that easy to wear, short life, to bear load small.It is engagement type mainly to have ratchet-type, it is contacted using face rigid Property transmission can bear larger load, the structure of single ratchet type is simple, in conjunction with and separation it is all very easy, reliability also compared with It is high, it may be said that advantage is very notable, but the back pressure face of pawl needs in over-travel and ratchet is kept in contact, frequent to hit not But larger noise is generated, energy consumption is also increased and is reduced the service life, using being very limited, is suitable only for low speed occasion, In addition, single ratchet type in axial dimension by limited time, to improve load-carrying ability must increase the circumferential size of ratchet, this is just increased Idle running angle and mesh impact, although and more ratchet types can greatly improve load-carrying ability, noise, transmission impact and system Make engagement conflict caused by precision and pawl action asynchronism to be still difficult to avoid that, big load ability and highly reliable cannot be had both Property.

Utility model content

The purpose of this utility model be to provide it is a kind of comprising main overrunning clutch and assist overrunning clutch it is compound Structure freewheel clutch uses ratchet and pawl as main clutch transmission, and load-carrying ability is improved simultaneously with more pawls The circumferential size for reducing ratchet using other types of overrunning clutch as auxiliary, while coordinating stroke to convert enlarger The use of the multiple technologies means such as structure, engagement lead-in chamfered, guide's pawl, evacuation gap, buffer gear is mitigating abrasion, is prolonging Long-life, eliminate conflict, slow down impact, control sensitivity, transmission accuracy, engagement orientation angles limitation, application range etc. it is many Aspect has also been achieved new progress.The transmission of the utility model includes ratchet（5）And pawl（13）, they are in over-travel It need not be kept in contact, outer shroud（1）Or inner ring（3）On have complementary overrunning clutch, ratchet can be triggered（5）And pawl （13）Enter engagement action when combining stroke, engagement power is provided or slows down transmission impact.

The complementary overrunning clutch of the utility model includes stroke conversion amplifying device, can be surmounted complementary The circumferential stroke of frictional locking element in arrangement of clutch is converted into pawl（13）The stroke of bigger, makes ratchet（5）And pawl （13）It is in when fully engaged position bears Main Load, complementary overrunning clutch locking element not yet reaches locking Thus engagement sensitivity is improved in position, and mitigate the degree that locking element is extruded to extend its service life.

The utility model has multiple ratchets（13）, and have throw-out collar（11）Or flexible structure is multiple ratchets（13）It connects Come, by a set of auxiliary arrangement of clutch synchronous control.

The outer shroud of the utility model（1）And its between external load or inner ring（3）With key（7）Between, Huo Zhejian（7） With axis（2）Between, it is reserved with circumferential gap in junction and setting padded coaming is nibbled to absorb engagement conflict or buffering therebetween Syzygies is hit.

The ratchet of the utility model（5）Or pawl（13）The way of contact be face contact, tooth top section shape be wedge angle, State labile when conflict is arranged at top and convenient for being staggered before and after Meshing Pair, or in outer shroud（1）, inner ring（3）, ratchet（5）Or spine Pawl（13）Upper setting magnetic material, polarity distribution can guide the crown of both sides to avoid collision position in engagement.

The utility model is there are one leading type pawl, always the first one elder generation and ratchet in engagement process（5）Contact, when going out When existing crown conflict, other pawls can be led（13）Pinnacle unanimously avoid ratchet forward or backward（5）Pinnacle.

Description of the drawings

Fig. 1 is the axial arrangement figure of single unit system；

Fig. 2 is the radial junction composition of single unit system；

Fig. 3 pawl radial motion control structure figures；

Fig. 4 is the scheme schematic diagram for coping with tooth top conflict.

Specific implementation mode

Referring to Fig.1, Fig. 2 or Fig. 3, axis 2 are fixedly connected by key 7 with inner ring 3, are connected by bearing 15 and the rotation of end cap 14 It connects, end cap 14 is fixedly connected with outer shroud 1；Raceway 16 and the equally distributed ratchet of direction congruous continuity are fixedly installed on outer shroud 1 5；Spring 6, roller 8 and its movable platform, lever 10, throw-out collar 11, elastic force block 12, pawl 13 are set in inner ring 3, and pawl 13 can To engage or detach with ratchet 5 by radially sliding or swinging, quantity can be divided exactly by the quantity of ratchet 5, uniformly divide circumferential Cloth, lever 10 are rotatablely connected by pin 9 and inner ring 3, and throw-out collar 11 is flexibly connected by wedge surface 17 with pawl 13；Roller 8 is in bullet It keeps contacting with the raceway 16 of outer shroud 1 under the pressure of spring 5, meanwhile, roller 8, lever 10 and pawl 13 are in spring 5 and spring 4 Also dynamic Contact is kept under bidirection press.When rotating speed is more than outer shroud 1 to inner ring 3 in the clockwise direction, roller 8 is clamped and outside Relatively narrow side movement in the space that ring 1 and inner ring 3 are constituted pushes throw-out collar 11 circumferential mobile, the wedge of throw-out collar 11 by lever 10 Face 17 is released to the radial constraint of pawl 13, and at this moment pawl 13 is pushed to ratchet 5 and is engaged by elastic force block 12；When inner ring 3 is suitable When clockwise rotating speed is less than outer shroud 1, wider side is moved in the space that roller 8 is constituted to outer shroud 1 and inner ring 3, throw-out collar 11 Pawl 13 is pushed away ratchet 5 in circumferential movement, wedge surface 17 under the pressure of spring 4.Moving radially for pawl 13 can also be by Throw-out collar 11 is arranged two-way wedge surface and carrys out double-direction control, saves elastic force block 12；Flexible structure may be used to replace in throw-out collar 11, circumferential direction Movement can also save spring 4 using the structure with 8 two-way linkage of roller come double-direction control；Ratchet 5, raceway 16 can also be set It sets in inner ring 3, correspondingly, spring 6, roller 8 and its movable platform, lever 10, throw-out collar 11, elastic force block 12, pawl 13 also may be used To be arranged on outer shroud 1；Spring 6 and roller 8 are used as a kind of complementary overrunning clutch, can also use other types of skill Art replaces, including but not limited to Wedge-type, flexible ring type, chain ring type, photo-electric, hydraulic type, pneumatic type, magnetic-type, artificial behaviour Control formula or above listed combination；Bearing 15 between axis 2 and end cap 14 can be replaced with sliding shaft sleeve, or directly sliding connects It connects；Roller 8 can alleviate the impact generated in engagement process during gradual wedging, because Main Load need not be undertaken, Its making material is not limited to high-strength metal material, in order to preferably alleviate impact, can also use the preferable material of elasticity, Such as polyurethane, polytetrafluoroethylene (PTFE).

Referring to Fig.1, lever 10 is at one end that fulcrum is rotatablely connected with inner ring 3 with pin 9, and the other end is contacted with throw-out collar 11, And it is in stage casing with the contact point of roller 8, when entering in conjunction with stroke, the shift motion of roller 8 can be by the free end of lever 10 Amplify and be further converted into the radial stroke of pawl 13.Stroke may be reduced in the conversion process by certain links, in order to Ensure that the stroke of pawl 13 is more than the stroke of roller 8, amplifying device can be arranged with many places.Amplification factor is bigger, and pawl 13 is more Fast to reach the position of engagement, the sensitivity of freewheel clutch is higher, pawl 13 reach the position of engagement bear Main Load with After prevent from roller 9 and slide further towards limit wedging position, it is possible thereby to which mitigate the degree that roller 8 is extruded makes to extend Use the service life.

Embodiment as shown in Figure 1, throw-out collar 11 are sleeved in inner ring 3, can be radially limited in circumferential movement, multiple Pawl 13 is together in series synchronous control, and the action of roller 8 can lead to the consistent action of multiple ratchets 13.As shown in figure 3, throw-out collar 11 when circumferentially mobile, and wedge surface 17 makes pawl 13 move radially with 12 mating reaction of elastic force block.Pawl 13 moves radially Two-way wedge surface can be set by throw-out collar 11 come double-direction control, save elastic force block 12.Throw-out collar 11 can also be replaced with flexible structure.

It, can be between outer shroud 1 and its external load or inner ring 3 in order to absorb engagement conflict or buffering mesh impact Between key 7 or between key 7 and axis 2, it is reserved with circumferential gap in junction and padded coaming, Fig. 1 institutes is set therebetween The embodiment shown is preset clearance and padded coaming to be arranged between key 7 and axis 2.

With reference to Fig. 3, the way of contact of ratchet 5 or pawl 13 contacts for face, and tooth top section shape is wedge angle, so as at top It is convenient for being staggered before and after Meshing Pair because of state labile when having conflict, it can also be on outer shroud 1, inner ring 3, ratchet 5 or pawl 13 Magnetic material is set, guides the crown of engagement both sides to avoid collision position using its polarity distribution.

In more pawl embodiments as shown in Figure 3, ratchet 5 and pawl 13 are all uniformly distributed, and the quantity of ratchet 5 is pawl 13 integral multiple, so, in case of no collision each pawl 13 and between nearest ratchet 5 before and after opposite position Set and be always consistent, but due to the presence of scale error, engagement action occur exactly at pinnacle collision position or it is neighbouring when, spine 13 some of pawl is staggered with ratchet 5 forward, and some is staggered with ratchet 5 backward, this results in engagement that can not continue, for this purpose, setting Set leading type pawl as the first from left in a figure --- because its radial dimension is larger or installation site is more outer, nibbling Always the first one elder generation contacts with ratchet 5 during conjunction.The back pressure face 20 of ratchet 5 and the angle of diameter are larger, and working face 18 with The angle of diameter is smaller, and guide surface 19 is arranged in the direction of working face 18, angle and back pressure face 20 and diameter with diameter Corner dimension is suitable, and circumferential width a is more than when it is just in pinnacle collision position, other pawls and nearest ratchet 5 Pinnacle distance in maximum one, pinnacle can be slided along guide surface 19 or back pressure face 20, lead other pawls 13 Pinnacle unanimously avoid the pinnacle of ratchet 5 forward or backward.Guide surface 19 can also be arranged on pawl 13.

Claims (6)

1. combined type freewheel clutch, including outer shroud（1）, inner ring（3）, transmission, it is characterised in that transmission includes ratchet（5） And pawl（13）, they need not be kept in contact in over-travel, outer shroud（1）Or inner ring（3）On have complementary overdrive clutch Device can trigger ratchet（5）And pawl（13）Enter engagement action when combining stroke, engagement power is provided or slows down biography Dynamic impact.

2. combined type freewheel clutch as described in claim 1, it is characterised in that complementary overrunning clutch includes row Journey converts amplifying device, the circumferential stroke of the frictional locking element in complementary overrunning clutch can be converted into pawl （13）The stroke of bigger, makes ratchet（5）And pawl（13）It is in when fully engaged position bears Main Load, it is complementary super More arrangement of clutch locking element not yet reaches lock position, thus improves engagement sensitivity, and mitigates locking element and be extruded Degree extend its service life.

3. combined type freewheel clutch as claimed in claim 1 or 2, it is characterised in that there is multiple ratchets（13）, and push away Ring（11）Or flexible structure is multiple ratchets（13）It is together in series, by a set of auxiliary arrangement of clutch synchronous control.

4. combined type freewheel clutch as claimed in claim 3, it is characterised in that outer shroud（1）And its between external load, or Person's inner ring（3）With key（7）Between, Huo Zhejian（7）With axis（2）Between, it is reserved with circumferential gap in junction and is arranged therebetween Padded coaming engages conflict or buffering mesh impact to absorb.

5. the combined type freewheel clutch as described in claim 1,2 or 4, it is characterised in that ratchet（5）Or pawl（13）Connect The mode of touching is that face contacts, and tooth top section shape is wedge angle, the state labile when conflict is arranged at top and convenient for mistake before and after Meshing Pair It opens, alternatively, in outer shroud（1）, inner ring（3）, ratchet（5）Or pawl（13）Upper setting magnetic material, polarity distribution can To guide the crown of both sides to avoid collision position in engagement.

6. combined type freewheel clutch as claimed in claim 5, it is characterised in that there are one leading type pawls, in engagement process In always the first one elder generation and ratchet（5）Contact, when there is crown conflict, can lead other pawls（13）Pinnacle unanimously to It is preceding or avoid ratchet backward（5）Pinnacle.