CN203623892U - Reciprocating swing driving device for crankshafts in bicycle - Google Patents

Abstract

The utility model discloses a reciprocating swing driving device for crankshafts in a bicycle, belongs to the technical field of manpower vehicles and fills the driving blank in existing driving devices. The reciprocating swing driving device comprises a driving portion and a driven portion which are connected through an annular chain. The driving portion comprises two identical crankshafts, the outer end of each crankshaft is provided with a pedal, and each central shaft penetrates a shaft bushing and is matched with the same through one bearing. A large cone is fixedly mounted between the crankshaft and the bearing on one side of the central shaft. The inner ends of the two crankshafts in the driving portion are respectively mounted at two ends of the central shafts through ratchet mechanisms, and the two ratchet mechanisms rotate in opposite directions. On each crankshaft, one end of a hinge is hinged with the crankshaft, the other ends of the two hinges are connected with two ends of a same rope, and the rope winds around a fixed pulley above the driving portion. A top dead center of the swinging crankshafts is located at the position of 11 o'clock, a bottom dead center is located at the position of 7 o'clock, and when one of the crankshafts swings to the top dead center, the other crankshaft swings to the bottom dead center.

Description

Crank reciprocating swinging drive device in bicycle

Technical field

The utility model relates to the crank reciprocating swinging drive device in a kind of bicycle, can avoid the existing driving of crank rotating drive clear area, and two cranks, alternately effectively driving district's work, obtain full-time propulsive effort, belong to manpower transportation's technical field.

Background technology

Actuating device in existing bicycle is a kind of double crank single flywheel link chain mechanism, and is divided into A end and secondary part, by chain, these two parts is coupled together.In the A end of this mechanism, two cranks are in 180 ° of angles and distribute, and the inner end of a crank is fixedly mounted on one end of axis, and the inner end of another root crank is fixedly mounted on the other end of axis, and a pedal is installed in the outer end of every crank; Axis, through axle sleeve, coordinates with axle sleeve by bearing; In a side of axis, between this side crank and this side bearing, fixedly mount large gear wheel.In the secondary part of this mechanism, flywheel is arranged on the axle skin of bicycle drive wheel, is distributed with the gear teeth identical with described large gear wheel gear teeth flute profile on the excircle of flywheel, form one with the little gear wheel of flywheel one.Little gear wheel is coplanar with the card of large gear wheel, and a ring chain is overlapped on large gear wheel and little gear wheel simultaneously.In the working process of this mechanism, manpower alternately puts on the pedal of two cranks, and two cranks are synchronous, rotating in same direction take axis as axle, and large gear wheel rotates thereupon, by the little gear wheel of chain-driving, flywheel rotating in same direction, finally propulsive effort warp beam skin is passed to bicycle drive wheel.Its main drawback of described existing actuating device is to exist to drive clear area.Division below in conjunction with clock card is described this, no matter any root crank, in its 360 ° of strokes, in this 120 ° of conter clockwise strokes that only have at 7 o'clock to 11 o'clock, manpower can effectively be applied on pedal, even if two cranks coordinate alternately to power, 5 o'clock to 7 o'clock, 11 o'clock to 1 o'clock totally 120 ° of strokes still for driving completely clear area.When actuating device is in the time driving clear area state, vehicle is actually by inertia and moves ahead.The driving that described driving clear area shows as vehicle is in time batch (-type) but not continous way, when vehicle is going up a slope, windward or load-carrying in the situation that, or while meeting muddy, soft, bumpy or rugged road conditions, batch (-type) drives and often causes normally travelling.

Utility model content

In order to obtain a kind of bicycle driving device that can continuous drive, we have invented the crank reciprocating swinging drive device in a kind of bicycle.

Crank reciprocating swinging drive device in the bicycle of the utility model comprises A end and secondary part, by ring chain, these two parts is coupled together; In described A end, have two identical cranks, a pedal is installed in the outer end of every crank; Axis, through axle sleeve, coordinates with axle sleeve by bearing; In a side of axis, between this side crank and this side bearing, fixedly mount large gear wheel; It is characterized in that, the inner end separately of two cranks in described A end is arranged on respectively the two ends of axis, two ratchet device switched in opposite by ratchet device; On every crank, one end and the crank of hinge are hinged, and the other end of two hinges connects the two ends of same drag-line, and guy cable rounds is positioned at the fixed pulley of A end top; According to the division of clock card, the top dead point of crank-swinging is positioned at the position of 11, and bottom dead point is positioned at the position of 7, and when a crank-swinging is during to top dead point, another crank-swinging is to bottom dead point.

Its technique effect of the scheme of the utility model is, because crank is connected by ratchet device with axis, in the time that manpower puts on crank of pedal drive and is moved to bottom dead point by top dead point, this crank drives axis to rotate, pull another crank to move to top dead point from bottom dead point by drag-line simultaneously, due to two ratchet device switched in opposite, now, for described another crank of the motion from bottom dead point to top dead point, connecting in the ratchet device of itself and axis, ratchet slips over from the ratchet gear teeth back of tooth, therefore, this crank not with axis effect.Afterwards, when manpower then while putting on another crank of another pedal drive, operating mode is with described contrary, this just formed two cranks one on the other reciprocally swinging replace the working process that continuous drive axis rotates, do not relate to and drive clear area.Although a crank is intermittently to drive axis to rotate,, seamless the continuing of driving process of two cranks, forms full-time propulsive effort, so axis continuous equidirectional rotates, then by large gear wheel, chain, flywheel, bicycle drive wheel continuous drive bicycle running.Utility model object is achieved.

Accompanying drawing explanation

Fig. 1 be the overall structure of the utility model and in bicycle distribution situation schematic diagram.Fig. 2 is the A end structural representation in the utility model, and this figure doubles as Figure of abstract.Fig. 3 is the ratchet device structure partial enlarged diagram in the A end in the utility model.Fig. 4 is drag-line and the local enlarged diagram of winch connecting structure in the A end in the utility model.Fig. 5 is drag-line in the A end in the utility model and structural relation and the pulley scheme case structure partial enlarged diagram of fixed pulley.Fig. 6 is that the crank reciprocally swinging in the A end in the utility model drives operating mode schematic diagram.

The specific embodiment

Crank reciprocating swinging drive device in the bicycle of the utility model comprises A end and secondary part, by ring chain 1, these two parts is coupled together, as shown in Figure 1.In described A end, have two identical cranks 2, as shown in Figure 1 and Figure 2, a pedal 3 is installed in the outer end of every crank 2, and axis 4, through axle sleeve 5, coordinates with axle sleeve 5 by bearing.In a side of axis 4, between this side crank 2 and this side bearing, fixedly mount large gear wheel 6, as shown in Figure 1.The inner end separately of two cranks 2 in described A end is arranged on respectively the two ends of axis 4 by ratchet device 7, as shown in Figure 2, and two ratchet device 7 switched in opposite.Described ratchet device 7 is interior engagement type, and as shown in Figure 3, and ratchet 8 is affixed with crank 2 inner ends, and ratchet 9 is affixed with middle shaft end.On every crank 2, one end of hinge 10 and crank 2 are hinged, and the other end of two hinges 10 connects the two ends of same drag-line 11, and as shown in Figure 1, Figure 2, Figure 4 shows, drag-line 11 is walked around the fixed pulley 12 that is positioned at A end top, as shown in Figure 2.The pulley yoke 13 of fixed pulley 12 is fixed on cycle frame, as shown in Figure 1.Described fixed pulley 12 has two, and as shown in Figure 1, shown in Figure 5, two fixed pulleys 12 are identical, and two fixed pulleys 12 are arranged on pulley yoke 13 side by side, and a fixed pulley 12 is near a crank 2, and another fixed pulley 12 is near another crank 2.Fixed pulley 12 diameters are 30mm.It is the steel rope of 2mm that drag-line 11 adopts diameter.According to the division of clock card, the top dead point that crank 2 swings is positioned at the position of 11, and bottom dead point is positioned at the position of 7, and in the time that a crank 2 is rocked to top dead point, another crank 2 is rocked to bottom dead point, as shown in Figure 6; The traverse of ratchet 2 is 120 °.

Claims (5)

1. the crank reciprocating swinging drive device in bicycle, comprises A end and secondary part, by ring chain, these two parts is coupled together; In described A end, have two identical cranks (2), a pedal is installed in the outer end of every crank (2); Axis, through axle sleeve, coordinates with axle sleeve by bearing; In a side of axis, between this side crank (2) and this side bearing, fixedly mount large gear wheel; It is characterized in that, the inner end separately of two cranks (2) in described A end is arranged on respectively the two ends of axis, two ratchet devices (7) switched in opposite by ratchet device (7); Upper at every crank (2), one end of hinge and crank (2) are hinged, and the other end of two hinges connects the two ends of same drag-line, and guy cable rounds is positioned at the fixed pulley (12) of A end top; According to the division of clock card, the top dead point that crank (2) swings is positioned at the position of 11, and bottom dead point is positioned at the position of 7, and in the time that a crank (2) is rocked to top dead point, another crank (2) is rocked to bottom dead point.

2. the crank reciprocating swinging drive device in bicycle according to claim 1, it is characterized in that, described ratchet device (7) is interior engagement type, and, ratchet (8) is affixed with crank (2) inner end, and ratchet (9) is affixed with middle shaft end.

3. the crank reciprocating swinging drive device in bicycle according to claim 1, is characterized in that, the pulley yoke (13) of fixed pulley (12) is fixed on cycle frame.

4. the crank reciprocating swinging drive device in bicycle according to claim 1, it is characterized in that, described fixed pulley (12) has two, two fixed pulleys (12) are identical, two fixed pulleys (12) are arranged on pulley yoke (13) side by side, a fixed pulley (12) is near a crank (2), and another fixed pulley (12) is near another crank (2).

5. the crank reciprocating swinging drive device in bicycle according to claim 1, is characterized in that, the traverse of ratchet (2) is 120 °.

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