RU2780873C1 - Reciprocating foot drive for bicycle - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular to reciprocating foot drives for bicycles. The drive contains a body, front and rear sliders, left and right L-shaped levers with pedals, a cable, a pulley, two anthers. The front and rear sliders are installed in the internal cavity of the housing in the same plane parallel to each other with the possibility of placing a bicycle chain between them. Each slider is movably mounted between two guide bars fixedly fixed on the rear and front end faces of the body, respectively. The front and rear sliders are provided with two spring-loaded grippers movably mounted on the axles between the sidewalls and engaged with the links of the bicycle chain when the slider moves down. The front and rear sliders are equipped with two stops. The stops are mounted above the spring-loaded grips. The upper and lower guide blocks for the bicycle chain, mounted on supports, are rigidly fixed, respectively, on the upper and lower faces of the housing. The pulley is installed on the upper face of the housing on the opposite side from the installation site of the upper guide block.

EFFECT: increased efficiency of the drive.

1 cl, 5 dwg

Description

The invention relates to the field of drives for bicycles implemented by applying human muscle power to foot pedals.

With any kind of physical activity performed by a person to drive various mechanisms, the most effective use of the muscular efforts performed during this is important. The long-term practice of cycling is based on the use of drives, which consist in converting the muscular force of the rotational movement of the cyclist's legs, applied to the pedals, into the rotational movement of the drive star connected by a chain drive to the driven star of the rear (rear) wheel (wheels).

From the point of view of the efficiency of using human muscular efforts, such drives have two main drawbacks:

to overcome by chain transmission a distance equal to the diameter of the leading star, it is required to overcome the distance along an arc equal to 0.5 of the circumference of the leading star, that is, approximately 1.57 more than its diameter; consequently, the efficiency of using the muscular efforts applied by the cyclist is reduced by no less than this amount;

the need to apply additional effort and skill to overcome the so-called "dead zones", when the connecting rods, especially before the start of the bicycle, are approximately on the same axis as the vector of application of the muscular efforts of the cyclist's legs.

When considering the technical literature, a number of technical solutions related to this issue were identified.

A known bicycle contains a frame with a front steered wheel mounted on it, a rear drive wheel, a seat with a back and two branches of a cable transmission on both sides of the bicycle, consisting of guide pipes fixed to the frame, with carriages installed in them, on which the pedals are attached, the reciprocating movements of which are transmitted by cables to ratchet pulleys mounted on the rear wheel hubs, a mechanism for returning the pedals to their original positions, consisting of a cable attached to the carriages and thrown over a block, the axis of which is fixed on the frame (utility model patent RU 117132, class V62M 1/04, published 06/20/2012, Bulletin No. 17).

A known drive for bicycles and velomobiles, containing a drive shaft with cranks and pedals, a driven shaft with an overrunning clutch in the drive wheel, a flexible transmission, a two-arm lever attached to the right crank or mounted on the drive shaft, cables thrown over curved surfaces made at the ends two-arm lever, the middle parts of the cables are wound and fixed on two pulleys mounted on the drive wheel with the possibility of interacting with it through overrunning clutches, and in the middle part of the two-arm lever there is a lever with elastic traction, for example, a spring, the second end of which is hooked to the frame (patent for the invention RU 2294859, class V62M 1/04, V62M 1/10, G05G 5/05, published on March 10, 2007, bull. No. 7).

The main disadvantages of these technical solutions are:

arcuate trajectory of the application of muscular efforts on the pedals, which reduces the efficiency of the use of these efforts;

the use of cable flexible connections, which, if they are not sufficiently tensioned or their surface is wet, can lead to a slipping effect, which also reduces the efficiency of applying muscular effort.

Closest to the claimed invention is Staroverov's muscular drive (options), containing pedals or handles, a torsion spring, which is connected at one end to a load, for example, with a mover, and at the other end is connected to an overrunning clutch fixed in the frame, and with another one or more overrunning clutches connected to pedals or handles, and all overrunning clutches allow rotation of the second end of the spring only in one direction, a ratchet clutch or ball, or roller, or wedge overrunning clutches are used as a freewheel, a flat-coil is used as a torsion spring a spring or a body-spiral spring, or a torsion bar, or a drum with an elastic cord wound around it, in any place of the power transmission flow there is a gearbox or a multiplier with a constant or variable gear ratio, in addition there is a freewheel in front of the mover, has a motion converter located after pedaling or handles, e.g. parallelogram or trapezoidal lever system, or rocker gear, or chain drive with a longitudinally moving carriage, or gear with rack, or cable drum, the drive has at least one return spring of the pedals or handles, the pedals or handles are connected with a compressor that is connected to a container connected to an air motor, and the gas outlet from the air motor is directed to the compressor inlet through an intermediate elastic container having a check valve directed into the container (patent for invention RU 2560226, cl. V62M 1/10, V62M 19/00, V62M 6/40, publ. 08/20/2015, bul. No. 23).

The main disadvantage of this drive is the arcuate trajectory of the application of muscular efforts on the pedals, which reduces the efficiency of the use of these efforts.

It follows from this that the most effective, from the point of view of using human muscular efforts, is a drive that implements the reciprocating principle of bicycle pedal movement.

The problem solved in the invention is to eliminate these disadvantages by developing a foot drive design for a bicycle, based on the reciprocating movement of the pedals and providing an increase in the efficiency of using the muscular forces acting on the bicycle pedals and the convenience of riding it.

The technical result of the invention is to give the bike, equipped with an improved foot drive, higher consumer properties.

The problem is solved, and the technical result is achieved as a result of the fact that, according to the invention, the reciprocating foot drive for a bicycle contains a body fixedly mounted on at least two mounts on the seat tube of the bicycle frame, front and rear sliders installed in the internal cavity of the housing in one plane parallel to each other with the possibility of placing a bicycle chain between them, each of which is movably mounted between two guide bars fixedly fixed on the rear and front end faces of the housing, respectively, and equipped with two spring-loaded grippers movably mounted on the axes between the sidewalls and engaged with links of a bicycle chain when the slider moves down, as well as two stops mounted above spring-loaded grips, left and right L-shaped levers with pedals, each of which is placed in a slot made respectively in the left and right side faces of the housing, and rigidly attached to the centers of the sidewalls of the corresponding slider, the upper and lower guide blocks for the bicycle chain, mounted on supports rigidly fixed, respectively, on the upper and lower faces of the housing, a cable fixed with its ends at the ends of the left and right L-shaped levers and thrown over the pulley , mounted on the upper face of the housing on the opposite side from the installation site of the upper guide block, two anthers movably fixed between the guide pads above the slots, respectively, in the left and right side faces of the housing.

The invention is illustrated in FIG. 1-5.

In FIG. 1 schematically shows a bicycle with a reciprocating foot drive, side view.

In FIG. 2 schematically shows a reciprocating foot drive for a bicycle in the initial phase of the movement of its pedals, a side sectional view.

In FIG. 3 schematically shows a reciprocating foot drive for a bicycle in the intermediate phase of moving its pedals, a side sectional view.

In FIG. 4 schematically shows a reciprocating foot drive for a bicycle, a sectional view from its end part.

In FIG. 5 schematically shows a reciprocating foot drive for a bicycle, a top sectional view.

In FIG. 1-5 the following designations are applied:

1 - body;

2 - front slider;

3 - rear slider;

4 - spring-loaded grip;

5 - bicycle chain;

6 - left L-shaped lever;

7 - right L-shaped lever;

8 - pedal;

9 - axis;

10 - emphasis;

11 - cable;

12 - pulley;

13 - upper guide block;

14 - lower guide block;

15 - support;

16 - tension block;

17 - rear wheel;

18 - driven star;

19 - sidewall;

20 - guide bar;

21 - seat tube of the bicycle frame;

22 - corner;

23 - mount;

24 - slot;

25 - anther;

26 - guide block.

Reciprocating foot drive for a bicycle works as follows.

Between the sidewalls 19 of the front 2 and rear 3 sliders, in their upper and lower parts, two spring-loaded grips 4 are fixed on the axles 9 and stops 10 are installed above them in such a way that when the spring-loaded grips 4 enter into engagement with the links of the bicycle chain 5 during movement of the front 2 or rear 3 sliders down the longitudinal axes of these spring-loaded grips 4 were perpendicular to the longitudinal axes of the sidewalls 19, respectively, of the front 2 or rear 3 sliders. The width of that part of each spring-loaded grip 4, which is installed between the sidewalls 19, is taken equal to approximately 1.1 of the external width of the bicycle chain 5, and the width of that part of the spring-loaded grip 4 that engages with the links of the bicycle chain 5 is equal to approximately 0.9 of the internal the width of the bicycle chain 5. For fastening to the sidewalls 19, respectively, the left 6 and right 7 L-shaped levers in the middle of the sidewalls 19 make mounting holes (not shown). Front 2 and rear 3 sliders are placed between two guide bars 20 with the possibility of their free movement between these bars. The guide bars 20 are fixedly fixed on the rear and front end faces of the body 1, respectively. To the corners 22, fixedly mounted along the longitudinal edges of the rear and front end faces of the body 1, the right side face of the body 1 is fixedly attached with a slot 24 pre-made in it. the configuration of the left 6 and right 7 L-shaped levers is performed in such a way that the pedals 8 mounted on them are in the same plane with the longitudinal axis of the body 1. The end of the left L-shaped lever 6 is passed through the longitudinal slots (not shown) of the guide bars 20 of the rear slider 3, through the mounting holes (not shown) in the sidewalls 19 of the rear slider 3 and the left L-shaped lever 6 is fixedly attached to the sidewalls 19 of the rear slider 3. The end of the right L-shaped lever 7 is passed through the slot 24 of the right side face of the housing 1, through the longitudinal slots (not shown) of the guide bars 20 of the front slider 2, through the mounting holes tie (not shown) in the sidewalls 19 of the front slider 2 and fixedly attach the right L-shaped lever 7 to the sidewalls 19 of the front slider 2. In this case, parts of the left 6 and right 7 L-shaped levers attached to the sidewalls 19, respectively, of the rear 3 and front 2 sliders are made with a length at which their ends are in the same plane relative to each other, parallel to the left side face of the body 1. In the upper end part of the body 1, the upper end face (not shown) is fixed with slots made in it (not shown) for a bicycle chain 5 and a cable 11. In the lower end part of the body 1, the lower end face (not shown) is fixed with a slot made in it (not shown) for the bicycle chain 5. On the upper end face, the support 15 is rigidly fixed with the upper guide block 13 movably mounted on it , and on the lower end face, the support 15 is rigidly fixed with the lower guide block 14 movably mounted on it. pulley 12 is rigidly fixed on the left side from the installation site of the upper guide block 13, the rear slider 3 is moved to the uppermost position, and the front slider 2 to the lowermost position, the cable 11 is thrown over the pulley 12 and its ends are connected to the ends of the left 6 and right 7 L-shaped levers placed in the inner cavity of the housing 1. The rear end face of the housing 1 is fixedly mounted on at least two mounts 23 on the seat tube of the bicycle frame 21, the bicycle chain 5 is mounted on the driven star 18 of the rear wheel 17 is passed through the upper guide block 13 , between the rear 3 and front 2 sliders, introducing the spring-loaded grips 4 of the rear slider 3 into engagement with its links, then through the lower guide block 14 and the tension block 16 fixed on the seat tube of the bicycle frame 21. The left side face of the body 1 through its slot 24 is passed along the free end part of the left L-shaped lever 6 and fixed on the corners 22, fixed along the longitudinal edges of the rear and front end faces of the housing 1. To prevent dust from entering the internal cavity of the housing 1, the slots 24 of its right and left side faces are covered with anthers 25 with the possibility of their movement along the guide blocks 26, which are fixedly fixed on the right and left side faces body 1. Pedals 8 are attached to the free outer ends of the left 6 and right 7 L-shaped levers.

When you press the foot, for example, on the pedal 8 of the left L-shaped lever 6, move it down the slot 24 and along the longitudinal slots (not shown) in the guide bars 20. In this case, through the left L-shaped lever 6, they act on the sidewalls 19 of the rear slider 3 and through its spring-loaded grips 4, resting on stops 10 and engaged with the corresponding links of the bicycle chain 5, set in motion the bicycle chain 5, which, moving along the upper 13 and lower 14 guide blocks mounted on the supports 15 and the tension block 16, leads in the rotation of the driven star 18 of the rear wheel 17 of the bicycle. As the rear slider 3 lowers, the front slider 2 is lifted up by means of the cable 11 acting on its right L-shaped lever 7, thrown over the pulley 12. In this case, the spring-loaded grips 4 of the front slider 2 rotate on their axes 9 and disengage from the links of the bicycle chain 5. After the transfer of muscle efforts to the pedal 8 of the right L-shaped lever 7, the spring-loaded grips 4 of the front slider 2 engage with the corresponding links of the bicycle chain 5 and move the bicycle chain 5 in the same sequence as when muscular efforts are applied to the pedal 8 of the left G -shaped lever 6. At the same time, as the front slider 2 slides down along the guide bars 20, the rear slider 3 is lifted along the guide bars 20 by means of a cable 11. During the movement of the front 2 and rear 3 sliders, the anthers 25 under the influence of the left 6 and right 7 L-shaped levers are moved along the guide blocks 26, preventing dust from entering the internal cavity of the frame 1. The stability of the reciprocating foot drive for a bicycle is ensured by a fixed connection of the mounts 23 of the body 1 with the seat tube of the bicycle frame 21. If it is necessary to install a new or restored bicycle chain 5, one of the side faces of the body 1 is disconnected from the corners 22, fixedly longitudinal edges of the rear and front end faces of the housing 1, install the bicycle chain 5 on the driven star 18 of the rear wheel 17, insert the bicycle chain 5 into the internal cavity of the housing 1, install it between the front 2 and rear 3 sliders, on the upper 13 and lower 14 guide blocks and tension block 16, the detached side face of the body 1 is fixed on the corners 22.

The design features of the proposed foot drive for a bicycle in comparison with the known technical solutions allow:

to reduce the specific energy consumption of the cyclist by reducing the distance of movement of his legs in each cycle of applying muscular efforts on the pedals to transfer them to the driven star of the rear (rear) wheel (s) of the bicycle;

completely eliminate the appearance of the effect of the so-called "dead zones" that make it difficult to transfer energy to the driven star of the rear (rear) wheel (s) of a bicycle, which is typical for technical solutions based on the rotational movement of the cyclist's legs;

to increase the stability of the bicycle during its movement by installing the pedals of the reciprocating foot drive in the same plane with the longitudinal axis of its body;

apply any amplitude of leg movement depending on their length or the conditions of a particular area, which helps to increase the comfort of cycling.

Thus, as a result of the implementation of the proposed design of a foot drive for a bicycle, based on the reciprocating movement of its pedals, it is possible to increase the efficiency of using human muscular efforts, increase the convenience and safety of cycling, and also give it higher consumer properties.

Claims (1)

A reciprocating foot drive for a bicycle, comprising a body fixedly mounted on at least two mounts on the seat tube of the bicycle frame, front and rear sliders installed in the internal cavity of the body in the same plane parallel to each other with the possibility of placing a bicycle chain between them, each of which is movably mounted between two fixedly fixed guide bars on the rear and front end faces of the housing, respectively, and is equipped with two spring-loaded grippers movably mounted on axes between the sidewalls and engaged with the links of the bicycle chain when the slider moves down, as well as two stops mounted above spring-loaded grips, left and right L-shaped levers with pedals, each of which is placed in a slot made respectively in the left and right side faces of the body, and is rigidly attached to the centers of the sidewalls of the corresponding slider, the upper and lower guide blocks for the bicycle single chain, mounted on supports rigidly fixed respectively on the upper and lower faces of the housing, a cable fixed with its ends at the ends of the left and right L-shaped levers and thrown over a pulley mounted on the upper face of the housing on the opposite side from the installation site of the upper guide block, two anthers, movably fixed between the guide pads above the slots, respectively, in the left and right side faces of the housing.

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