CN2464987Y

CN2464987Y - Friction free low resistance one-way driving gear

Info

Publication number: CN2464987Y
Application number: CN 01201214
Authority: CN
Inventors: 王明正
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-08
Filing date: 2001-02-08
Publication date: 2001-12-12
Anticipated expiration: 2011-02-08

Abstract

The utility model relates to a friction free low resistance one-way driving gear, comprising a gear, a rotary plate, a ratchet wheel and a plurality of movable ratchets, wherein, the annular circumference on the inner diameter of the gear is provided with inner ratchets, the diameter of the rotary plate is smaller than the inner diameter of the gear, the rotary plate and the gear are arranged concentrically on the inner diameter of the gear, and a plurality of stopping elements are arranged on the rotary plate; the outside diameter of the ratchet wheel is smaller than that of the rotary plate, and the outer circumference of the ratchet wheel is provided with a plurality of outer ratchets; a plurality of movable ratchets are pivoted on the rotary plate, so the movable ratchets can rotate around the rotary plate relatively; each movable ratchet is provided with a first end part and a second end part which are arranged symmetrically, and the symmetric both sides of each movable ratchet are blocked by the stopping element. The utility model has the advantages of less labor and no noise.

Description

The unidirectional drive gear that does not have the friction lower resistance

The utility model relates to a kind of actuation gear of bicycle, relates in particular to a kind of user's of saving muscle power, and can not produce the unidirectional drive gear of the nothing friction lower resistance of noise.

Existing bicycle is in order to reach the purpose of saving manpower, generally all can install the unidirectional drive gear at rear-wheel spindle, this unidirectional drive gear and be located between the gearwheel in the place ahead and be combined with chain, the user when chain interlock unidirectional drive gear is rotated in the forward, can drive the trailing wheel rotation in pushes pedals; Otherwise when the unidirectional drive gear is not activated, or during counterrotating, then trailing wheel can't be driven in rotation.

As shown in Figure 4, the unidirectional drive gear structure of commonly using includes a gear A, the gear A internal diameter is space in, in the internal diameter of gear A, be provided with a ratchet B with one heart, and be equipped with several stop elements A1 on the bottom surface in the gear A internal diameter, and be pivoted with several movable ratchet C, and be combined with torque spring D at the pivot C1 of movable ratchet C, two legs of torque spring D are butted on the internal diameter wall and the stop element A1 of gear A respectively.By structure shown in Figure 4, when gear A is activated and when being rotated counterclockwise, movable ratchet C can also be rotated counterclockwise because clip drives ratchet B in the outer ratchet B1 of ratchet B; When gear A was stopped the rotation, then ratchet B can continue to be rotated counterclockwise because of action of inertia, but then can not produce the clip effect between outer ratchet B1 and the movable ratchet C, thereby formed idle running; Or when the gear A clockwise direction rotates, also can not produce the clip effect between this activity ratchet C and the outer ratchet B1, thereby also form idle running.The aforesaid ratchet driving structure of commonly using is in when idle running, produces force of sliding friction owing to understand contact between movable ratchet C and the outer ratchet B1, so can produce resistance, wastes user's muscle power, and can produce noise.

Given this, main purpose of the present utility model is, a kind of unidirectional drive gear that does not have the friction lower resistance is provided, its gear is when static or idling conditions, being located at inner movable ratchet can not contact with ratchet, thereby can not produce surface friction drag, save user's muscle power, and can not produce noise.

Whereby when gear during not stressed or counterrotating, the two ends of this activity ratchet can not touch aforesaid inside and outside ratchet, make and be idling conditions between gear and the ratchet, and when gear is rotated in the forward, then the end by interior ratchet affects movable ratchet, and then make the other end of movable ratchet be butted on the outer ratchet of aforementioned ratchet, allow gear be rotated in the forward by driving pawl.Again, not stressed or when being rotated in the forward when ratchet, the two ends of movable ratchet can not touch aforesaid inside and outside ratchet, make and be idling conditions between gear and the ratchet, when the ratchet counterrotating, also can make the two ends of movable ratchet be butted on aforesaid outer ratchet and internal clickwork respectively, allow the ratchet drives gear be rotated in the forward.

The purpose of this utility model is realized by following technological scheme.

A kind of unidirectional drive gear that does not have the friction lower resistance is characterized in that, comprises a gear, a rotating disk, a ratchet, several movable ratchets; The ring week of described gear internal diameter is provided with interior ratchet; Described disk diameter is less than the internal diameter of aforesaid gears, and rotating disk and this gear be concentric to be located in the internal diameter of gear, and rotating disk is provided with several stop elements; Described ratchet external diameter is less than the external diameter of aforementioned rotating disk, and the excircle of this ratchet is provided with several outer ratchets; Described several movable ratchets are to be hubbed on the aforesaid rotating disk, make the movable ratchet can be with respect to dial rotation, and this activity ratchet has symmetrical first end and the second end, and the symmetrical both sides of this activity ratchet can be stopped by aforesaid stop element.

The utility model can be saved user's muscle power, and can not produce noise.

For further understanding technology contents of the present utility model, characteristics and effect, exemplify following preferred embodiment now, and conjunction with figs. is described in detail as follows:

Fig. 1 is the utility model integral planar structural representation, shows the state when gear is not stressed.

Fig. 2 is behind the strength of gear shown in Figure 1, makes the two ends of activity tooth be contacted with the planar gesture schematic representation of the state of inside and outside ratchet respectively.

Fig. 3 is that ratchet shown in Figure 1 rotates as driving wheel, and then the two ends of modern movable tooth are contacted with inside and outside ratchet respectively, with the planar gesture schematic representation of actuation gear rotation.

Fig. 4 is a plane view of commonly using the unidirectional drive gear structure.

Consult shown in Figure 1ly, the utility model preferred embodiment includes a gear 1, a rotating disk 2, a ratchet 3 and several movable ratchets 4.Wherein, the internal diameter of gear 1 has interior space, is provided with ratchet 11 in several in the internal diameter ring week of gear 1; Gear 1 is to cooperate with chain, to carry out passive driving.The diameter of rotating disk 2 is less than the internal diameter of aforesaid gears 1, and in the concentric internal diameter of being located at gear 1 of rotating disk 2 and gear 1, and rotating disk 2 is provided with several stop elements 21, wherein, with two stop elements 21 be one group be equally distributed on the rotating disk 2 around.The external diameter of ratchet 3 is less than the external diameter of rotating disk 2, and the excircle of ratchet 3 is provided with several outer ratchets 31; The center hole of ratchet 3 is for matching with the rear-wheel spindle of bicycle.Movable ratchet 4 of the present utility model is to be hubbed on the aforesaid rotating disk 2 to drive axle 41, and movable ratchet 4 can be rotated with respect to rotating disk 2, and this activity ratchet 4 has symmetrical first end 411 and the second end 412.

By aforesaid structure, when gear 1 not stressed and when remaining static (as shown in Figure 1), the symmetrical dual-side of movable ratchet 4 can be stopped by stop element 21, this moment, first and second end 411,412 of movable ratchet 4 did not all touch outer ratchet 31 and interior ratchet 11, thereby ratchet 3 does not rotate freely with can having friction and noise free.When clockwise direction (oppositely) rotated if gear 1 is activated, its interior ratchet 11 was not because can pin down movable ratchet 4, thereby ratchet 3 does not rotate freely with can having friction and noise free yet.

As shown in Figure 2, when counterclockwise (forward) rotates if gear 1 is activated, then the gear in the rotation 1 can affect the second end 412 of movable ratchet 4 by ratchet 11 in it, and then make movable ratchet 4 deflections and make wherein one outside the ratchet 31 of first end 411 clips in ratchet 3, allow ratchet 3 and gear 1 combine, at this moment, the gear 1 that is rotated counterclockwise just can also rotate in the counterclockwise by driving pawl 3; After the external force effect of removing gear 1, then ratchet 3 just can not be activated and rotate.

Structure shown in Figure 1 except being fit to utilize chain drive gear 1, to drive outside the ratchet 3 unidirectional rotations, also can be changed into the mode of operation that is driven by ratchet 3 with being driven by gear 1.Its mode of operation is: when ratchet 3 not stressed and when remaining static, the symmetrical dual-side of movable ratchet 4 can be stopped by stop element 21 and stop, first and second end 411,412 of the movable ratchet 4 of this moment does not all touch outer ratchet 31 and interior ratchet 11, thereby gear 1 does not rotate freely with can having friction and noise free.When counterclockwise (forward) rotates if ratchet 3 is activated, because outer ratchet 31 does not affect the first end 411 of movable ratchet, thereby movable ratchet 4 is under the situation of not deflection, its the second end 412 can clip yet to the interior ratchet of gear 1, thereby do not rotate freely with can having friction and noise free yet.

As shown in Figure 3, when clockwise direction (oppositely) rotates if ratchet 3 is activated, then the outer ratchet 31 of the ratchet 3 in the rotation can affect the first end 411 of movable ratchet 4, allow movable ratchet 4 deflections, and then make the wherein internal clickwork 11 of the second end 412 clips in ratchet 1, allow ratchet 3 and gear 1 combine.At this moment, the ratchet 3 that turns clockwise just can also deasil rotate by actuation gear 1; Removed the effect of external force when ratchet 3 after, then gear 1 just can not be activated rotation.

And mode of operation shown in Figure 3 is the live axle that is suitable for ratchet 3 is incorporated into motor, make ratchet 3 when rotated actuation gear 1 do the design of unidirectional rotation.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

1, a kind of unidirectional drive gear that does not have the friction lower resistance is characterized in that, comprises a gear, a rotating disk, a ratchet, several movable ratchets;

The ring week of described gear internal diameter is provided with interior ratchet;

Described disk diameter is less than the internal diameter of aforesaid gears, and rotating disk and this gear be concentric to be located in the internal diameter of gear, and rotating disk is provided with several stop elements;

Described ratchet external diameter is less than the external diameter of aforementioned rotating disk, and the excircle of this ratchet is provided with several outer ratchets;

Described several movable ratchets are to be hubbed on the aforesaid rotating disk, make the movable ratchet can be with respect to dial rotation, and this activity ratchet has symmetrical first end and the second end, and the symmetrical both sides of this activity ratchet can be stopped by aforesaid stop element.