CN209581754U - Lever type crank chain disc driving device with additional flexible transmission pair on middle shaft - Google Patents

Abstract

The utility model provides a epaxial lever crank chain dish drive arrangement who is equipped with additional flexible transmission pair in heart, it is through adorning conventional crank chain dish on the lever to it is vice to set up one set of additional flexible transmission pair epaxial, realizes from this that to do reciprocating swing and drive the lever mechanism of flexible transmission pair motion and the crank chain dish mechanism complex of doing the motion of plane crank rocker be in the same place, makes two sets of power complete combinations, realizes the gradual change formula alternation power conversion. The driving device has high operating efficiency, can be used for left and right sharing during riding, has continuous, sufficient and stable physical energy conversion and is not easy to fatigue, is used for driving the bicycle, is suitable for various occasions such as long-distance cross country, short-distance racing, urban leisure, mountain tourism and the like, and also can be used for driving other small-sized vehicles and various pedal type manpower machines.

Description

A lever type crank chain disk drive device with an additional flexible transmission pair on the center shaft

technical field

The utility model relates to a driving device, in particular to a lever type crank chain disk driving device with an additional flexible transmission pair on the central shaft.

Background technique

Bicycle is loved by people because of its advantages such as simple structure, firmness, convenient use, environmental protection and energy saving, and good fitness effect. The most common driving device for bicycles is the crank chain disc driving device. This device has been used for many years, but it is still not perfect in terms of driving efficiency and reducing riding fatigue, which is more obvious when going uphill. Therefore, when going uphill, riding a conventional bicycle driven by a crank chain disc is often difficult, not as easy as running, and riding a variable speed bicycle driven by a crank chain disc is also exhausting and unsatisfactory.

For this reason, we have improved the conventional crank-chain-dish driving device, combining the lever mechanism for reciprocating swing and driving the flexible transmission pair with the crank-chain-dish mechanism for planar crank rocker movement to form a new driving mechanism. The driving device can realize the complete combination of two sets of power, with high efficiency, it can be shared left and right when riding, and the physical energy conversion is continuous, sufficient and stable, and it is not easy to fatigue.

Utility model content

The purpose of the utility model is to provide a lever type crank chain disk driving device with an additional flexible transmission pair on the central shaft, so as to solve the problems of low efficiency and easy riding fatigue of the existing bicycle driving device.

The concrete technical scheme that the utility model adopts is as follows:

A lever-type crank chain drive device with an additional flexible transmission pair on the central axis, including a frame, the front end of the frame is hinged with a lever extending horizontally and backward to the middle of the frame, and the front end of the lever is hinged to the frame The point is the fulcrum of the lever, the middle part of the lever is connected to the upper end of the thrust spring, and the lower end of the thrust spring is connected to the frame at the lower part of the lever, and the thrust spring forms a support for the lever; the rear end of the lever is provided with a shaft seat, and a A rotatable center shaft, the two ends of the center shaft are respectively equipped with opposite left and right cranks, the ends of the left and right cranks are respectively hinged to the left and right pedals, and the right position of the middle part of the center shaft is fixedly equipped with a chain disc; the frame The rear end is equipped with a rear axle, and a rotatable hub is set on the rear axle. A flywheel is arranged on the hub, and a surrounding chain ring is engaged with the outer ring of the flywheel and the chain plate, and the power is output from the hub; A tensioning mechanism is provided on the frame at the lower part, and the chain ring is tensioned by the tensioning mechanism; an additional flexible transmission pair is also provided on the central shaft.

The flexible transmission pair includes a chain, an overrunning transmission wheel and a telescopic spring, wherein the overrunning transmission wheel is connected to the left position in the middle of the center shaft through its internal ratchet pawl one-way clutch, and the overrunning transmission wheel and the flywheel on the rear axle The direction of rotation is the same, the outer ring of the overrunning transmission wheel is a sprocket, one end of the chain is fixedly connected to the frame above the lever side, the other end of the chain extends backwards obliquely and bypasses the overrunning transmission wheel from top to bottom, and then to The front is connected to one end of the telescopic spring, and the other end of the telescopic spring is fixedly connected to the front frame.

The chain in the flexible transmission pair can also be replaced by a stay rope, and the sprocket beyond the outer ring of the transmission wheel can be replaced by a pulley with a U-shaped groove.

In addition, in the above technical solution, the lever fulcrum is set in front of the central axis, but the lever fulcrum can also be set behind the central axis, thereby forming the second technical solution.

A lever type crank chain disk drive device with an additional flexible transmission pair on the central axis, including a frame, the rear end of the frame is hinged with a lever extending transversely forward to the middle of the frame, the rear end of the lever is connected to the frame The hinge point of the lever is the fulcrum of the lever, the middle part of the lever is connected to the lower end of the tension spring, and the upper end of the tension spring is connected to the frame on the upper part of the lever, and the tension spring forms a suspension to the lever; A rotatable center shaft, the two ends of the center shaft are respectively equipped with opposite left and right cranks, the ends of the left and right cranks are respectively hinged to the left and right pedals, and the right position of the middle part of the center shaft is fixedly equipped with a chain disc; the frame The rear end is also set up with a rear axle behind the lever fulcrum, and a rotatable hub is set on the rear axle. A flywheel is arranged on the hub, and a surrounding chain ring is engaged with the outer ring of the flywheel and the chain disc. output power; the central shaft is also provided with a set of additional flexible transmission pairs.

The flexible transmission pair includes a chain, an overrunning transmission wheel and a telescopic spring, wherein the overrunning transmission wheel is connected to the left position in the middle of the center shaft through its internal ratchet pawl one-way clutch, and the overrunning transmission wheel and the flywheel on the rear axle The rotation direction is the same, the outer ring of the overrunning transmission wheel is a sprocket, one end of the chain is fixedly connected to the frame above the lever, the other end of the chain extends forward obliquely, and goes around the overrunning transmission wheel from bottom to top and then backwards It is connected to one end of the telescopic spring, and the other end of the telescopic spring is fixedly connected to the frame above the lever.

In this technical solution, the front end of the lever can be set in the form of a U-shaped fork, and the U-shaped fork and the vertical frame in the middle are staggered to avoid the front end of the lever and the vertical frame in the middle when the lever swings. frame interferes.

Similarly, the chain in the flexible transmission pair can also be replaced by a stay rope, and the sprocket beyond the outer ring of the transmission wheel can be replaced by a pulley with a U-shaped groove.

The driving device of the utility model is installed on the lever with a conventional crank chain disc, and an additional set of flexible transmission pair is arranged on the central axis, thereby realizing a lever mechanism that will reciprocate and drive the flexible transmission pair to move It is combined with the crank chain plate mechanism for plane crank rocker movement, so that the two sets of power are completely combined to realize gradual and alternating power conversion. The driving device has high operating efficiency, can be shared left and right when riding, and the physical energy conversion is continuous, sufficient, stable, and not easy to fatigue. It is used for bicycle driving and can be applied to various occasions such as long-distance cross-country, short-distance racing, urban leisure, mountain tourism, etc. It can also be used for driving other small vehicles and various foot-operated human machines.

Description of drawings

Fig. 1 is a structural schematic diagram of the driving device when the lever fulcrum is arranged in front of the central axis.

Fig. 2 is a structural schematic diagram of the driving device when the lever fulcrum is arranged behind the central axis.

Fig. 3 is a schematic diagram of the circumference angle of the rear end of the lever when the lever in the driving device of Fig. 1 swings.

Fig. 4 is a schematic diagram of the circumference angle of the front end of the lever when the lever in the driving device of Fig. 2 swings.

In the figure: 1-frame, 2-lever, 3-lever fulcrum, 4-thrust spring, 5-center shaft, 6-crank, 7-pedal, 8-chain plate, 9-rear axle, 10-hub , 11-flywheel, 12-chain ring, 13-chain, 14-overdrive wheel, 15-telescopic spring, 16-tension mechanism, 17-tension spring.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1-2, as the first technical solution, the driving device includes a frame 1, the front end of the frame 1 is hinged with a lever 2 extending laterally and backward to the middle of the frame 1, and the front end of the lever 2 is connected to the frame. The hinge point of 1 is the lever fulcrum 3, the middle part of the lever 2 is connected to the upper end of the thrust spring 4, and the lower end of the thrust spring 4 is connected to the frame 1 at the bottom of the lever 2, and the lever 2 is formed by the thrust spring 4. The rear end is provided with a shaft seat, and a rotatable central shaft 5 is installed in the shaft seat. The two ends of the central shaft 5 are respectively equipped with opposite left and right cranks 6, and the ends of the left and right cranks 6 are respectively hinged to the left and right pedals. 7. A chain disc 8 is fixedly mounted on the right side of the central axis 5; a rear axle 9 is mounted on the rear end of the frame 1, and a rotatable flower hub 10 is set on the rear axle 9, and a flywheel 11 is arranged on the flower hub 10. A surrounding chain ring 12 is engaged with the outer ring of the flywheel 11 and the chain disc 8, and the power is output by the hub 10; The ring 12 is tensioned; the central shaft 5 is also provided with a set of additional flexible transmission pairs.

The flexible transmission pair includes a chain 13, an overrunning transmission wheel 14 and a telescopic spring 15, wherein the overrunning transmission wheel 14 is connected to the left position of the center shaft 5 through its internal ratchet pawl one-way clutch, and the overrunning transmission wheel 14 The direction of rotation of the flywheel 11 on the rear axle 9 is the same, the outer ring of the overrunning transmission wheel 14 is a sprocket, one end of the chain 13 is fixedly connected to the frame 1 above the side of the lever 2, and the other end of the chain 13 extends backwards obliquely And bypass the overrunning transmission wheel 14 from top to bottom, and then be connected to an end of the telescopic spring 15 forward, and the other end of the telescopic spring 15 is fixedly connected on the frame 1 ahead. The chain 13 in the flexible transmission pair can also be replaced by a stay rope, and the sprocket wheel beyond the outer ring of the transmission wheel 14 can be replaced by a pulley with a U-shaped groove.

The working process of the driving device of the first technical scheme is as follows:

Stepping on the pedal 7 at the top dead center position, at this moment, the downward pedaling force provided for the lever 2 is the largest, and the rotational moment provided for the crank 6 is zero, and the pedaling force cannot drive the chain plate 8 to rotate, but it can make the lever 2 downward Swing, chain 13 can drive overrunning drive wheel 14 to rotate when lever 2 hems, and by overrunning drive wheel 14, axis 5 is driven to rotate, and pedal 7 is passed through top dead center position fast. Continue to step on the pedal 7 to rotate through a certain angle. Since the crank 6 has a rotational moment, the crank 6 and the overrunning drive wheel 14 jointly drive the central shaft 5 to rotate, and then the chain plate 8 will rotate, and drive the flywheel 11 to rotate. 11 drives hub 10 to rotate. When the crank 6 was forwarded to the horizontal position, the rotational moment was the maximum, and the downward pedaling force provided by the lever 2 was reduced to zero this moment. When stepping on the pedal 7 to the bottom dead center position again, the rotational moment provided by the crank 6 becomes zero again, and the downward pedaling force provided by the lever 2 becomes maximum again. It can be seen that the power provided by the lever 2 for the central shaft 5 by overriding the overrunning transmission wheel 14 and the power provided by the crank 6 for the central shaft 5 can complement each other and realize gradual and alternating power conversion. Since there is a thrust spring 4 that can automatically reset the lever 2, the reciprocating swing of the lever 2 and the rotation of the crank 6 do not affect each other, and the extra power provided by the lever 2 through the overrunning transmission wheel 14 can increase the pedaling efficiency, thereby facilitating high-frequency pedaling , the track of the pedal 7 is approximately an upright ellipse when stepping on it.

As shown in Figure 3-4, as the second technical solution, the driving device includes a frame 1, the rear end of the frame 1 is hinged with a lever 2 extending transversely forward to the middle of the frame, and the rear end of the lever 2 is connected to the frame. The hinge point of frame 1 is lever fulcrum 3, and the middle part of lever 2 connects the lower end of tension spring 17, and the upper end of tension spring 17 is connected on the frame 1 of lever 2 top, forms suspension to lever 2 by tension spring 17; The front end is provided with a shaft seat, and a rotatable central shaft 5 is installed in the shaft seat. The two ends of the central shaft 5 are respectively equipped with opposite left and right cranks 6, and the ends of the left and right cranks 6 are respectively hinged to the left and right pedals 7. , the position on the right side of the central axis 5 is fixed with a chain disc 8; the rear end of the frame 1 is also set up with a rear axle 9 behind the lever fulcrum 3, and the rear axle 9 is equipped with a rotatable flower hub 10, and the flower hub 10 A flywheel 11 is arranged on it, and a surrounding chain ring 12 is engaged with the outer ring of the flywheel 11 and the chain disc 8, and the power is output from the hub 10; the central shaft 5 is also provided with an additional set of flexible transmission pairs.

The flexible transmission pair includes a chain 13, an overrunning transmission wheel 14 and a telescopic spring 15, wherein the overrunning transmission wheel 14 is connected to the left position of the center shaft 5 through its internal ratchet pawl one-way clutch, and the overrunning transmission wheel 14 Same as the direction of rotation of the flywheel 11 on the rear axle 9, the outer ring of the overrunning transmission wheel 14 is a sprocket wheel, and one end of the chain 13 is fixedly connected on the frame 1 above the lever 2, and the other end of the chain 13 extends obliquely forward. And go around the overrunning drive wheel 14 from bottom to top and then be connected to an end of the telescopic spring 15 backward, and the other end of the telescopic spring 15 is fixedly connected on the frame 1 above the lever 2 . In order to avoid interference between the front end of the lever 2 and the middle vertical frame 1 when the lever 2 swings, the front end of the lever 2 can be set in the form of a U-shaped fork, and the U-shaped fork and the middle vertical frame 1 are staggered from each other . The chain 13 in the flexible transmission pair can also be replaced by a stay rope, and the sprocket wheel beyond the outer ring of the transmission wheel 14 can be replaced by a pulley with a U-shaped groove.

The working process of the driving device of the second technical solution is similar to that of the driving device of the first technical solution. Since the lever fulcrum 3 is close to the rear axle 9, the lower chain of the chain ring 12 will not be too loose when the lever 2 swings downward. Therefore it is not necessary to provide a tensioning mechanism. The front end of the frame 1 of the second technical solution is not blocked by the lever 2 and the flexible transmission pair. This structure is more conducive to getting on and off the car and is not easy to touch dirty clothes.

In the two technical schemes of Fig. 1 and Fig. 2, the position of the lever 2 and the distribution position of the flexible transmission pair are on the front side or the rear side of the central axis 5. The three points of the lever fulcrum 3 and the swing end of the lever 2 form a circumscribed circle. When the lever 2 swings, the swing end of the lever 2 does not deviate much from the circumscribed circle, and the size of the circumferential angle formed on the circumscribed circle does not change much, as shown in the figure 3-4, therefore, according to the ratio between the power arm and the resistance arm of the crank 6, adjust the inclination angle of the chain 13 installed on the frame 1 to an appropriate angle, so that the power provided by the flexible transmission pair and the crank 6 The power delivered is always well-matched, with maximum efficiency added when pedalling.

The technical solutions of Fig. 1 and Fig. 2 can also be changed to the situation where the position of the lever 2 and the distribution position of the flexible transmission pair are respectively on the front and rear sides of the central axis 5, but at this time when the lever 2 swings, the swing end of the lever 2 The formed circular angle changes greatly, therefore, the power provided by the flexible transmission pair and the power provided by the crank 6 cannot always match in time, and the increased efficiency during pedaling will be affected.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of the new protection.

Claims (5)

1. A lever-type crank chain disk driving device with an additional flexible transmission pair on the central axis, characterized in that: the driving device includes a frame, and the front end of the frame is hinged with a horizontally extending backward to the middle of the frame. The lever, the hinge point between the front end of the lever and the frame is the lever fulcrum, the middle part of the lever is connected to the upper end of the thrust spring, and the lower end of the thrust spring is connected to the frame at the lower part of the lever, and the lever is formed by the thrust spring to support; the rear end of the lever There is a shaft seat, and a rotatable central shaft is installed in the shaft seat. The two ends of the central shaft are respectively equipped with opposite left and right cranks. The ends of the left and right cranks are respectively hinged with the left and right pedals. The middle part of the central shaft is right The position is fixed with a chain plate; the rear end of the frame is equipped with a rear axle, and a rotatable hub is set on the rear axle. A flywheel is arranged on the hub, and a surrounding chain ring is engaged with the outer ring of the flywheel and the chain plate. , the power is output by the hub; a tensioning mechanism is provided on the frame at the lower part of the chain ring, and the chain ring is tensioned by the tensioning mechanism; an additional flexible transmission pair is also provided on the central shaft; The flexible transmission pair includes a chain, an overrunning transmission wheel and a telescopic spring, wherein the overrunning transmission wheel is connected to the left position in the middle of the center shaft through its internal ratchet pawl one-way clutch, and the overrunning transmission wheel and the flywheel on the rear axle The direction of rotation is the same, the outer ring of the overrunning transmission wheel is a sprocket, one end of the chain is fixedly connected to the frame above the lever side, the other end of the chain extends backwards obliquely and bypasses the overrunning transmission wheel from top to bottom, and then to The front is connected to one end of the telescopic spring, and the other end of the telescopic spring is fixedly connected to the front frame. 2. The driving device according to claim 1, characterized in that: the chain in the flexible transmission pair is replaced by a pull rope, and the sprocket beyond the outer ring of the transmission wheel is replaced by a pulley with a U-shaped groove . 3. A lever-type crank chain disk driving device with an additional flexible transmission pair on the central shaft, the feature is that: the driving device includes a frame, and the rear end of the frame is hinged with a horizontally extending forward to the middle of the frame The lever, the hinge point between the rear end of the lever and the frame is the lever fulcrum, the middle part of the lever is connected to the lower end of the tension spring, and the upper end of the tension spring is connected to the frame on the upper part of the lever, and the tension spring forms suspension to the lever; the front end of the lever There is a shaft seat, and a rotatable central shaft is installed in the shaft seat. The two ends of the central shaft are respectively equipped with opposite left and right cranks. The ends of the left and right cranks are respectively hinged with the left and right pedals. The middle part of the central shaft is right The position is fixed with a chain disc; the rear end of the frame is also equipped with a rear axle behind the lever fulcrum, and a rotatable hub is set on the rear axle. A flywheel is arranged on the hub, and the outer ring of the flywheel and the chain disc mesh There is a surrounding chain ring, and the power is output from the hub; there is also a set of additional flexible transmission pairs on the central shaft; The flexible transmission pair includes a chain, an overrunning transmission wheel and a telescopic spring, wherein the overrunning transmission wheel is connected to the left position in the middle of the center shaft through its internal ratchet pawl one-way clutch, and the overrunning transmission wheel and the flywheel on the rear axle The rotation direction is the same, the outer ring of the overrunning transmission wheel is a sprocket, one end of the chain is fixedly connected to the frame above the lever, the other end of the chain extends forward obliquely, and goes around the overrunning transmission wheel from bottom to top and then backwards It is connected to one end of the telescopic spring, and the other end of the telescopic spring is fixedly connected to the frame above the lever. 4. The driving device according to claim 3, characterized in that: the front end of the lever is arranged in the form of a U-shaped fork, and the U-shaped fork is staggered from the middle vertical frame. 5. The driving device according to claim 3, characterized in that: the chain in the flexible transmission pair is replaced by a pull rope, and the sprocket beyond the outer ring of the transmission wheel is replaced by a pulley with a U-shaped groove .