RU2744275C1 - Additional bike hand drive - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular to additional manual drives for a bicycle. The drive contains a drive lever coaxially mounted on the bicycle handlebar shaft. The bending of the hand drive lever occurs when the lever moves back and forth at the cardan joint. The presence of a cardan joint on the lever of the hand drive enables simultaneous reciprocating and rotational movement around the axis of the drive lever. The rotational movement of the drive around the axis provides steering of the bicycle. The back-and-forth motion of the drive provides movement of the bike. The movement of the bicycle occurs when the drive lever is pushed away from itself through the transfer of energy through the cable to the ratchet drum and the carriage-pedal mechanism of the bicycle.

EFFECT: increased convenience of using manual bicycle drive.

5 cl, 8 dwg

Description

The invention relates to the field of bicycle technology, in particular, to additional drives for bicycles, both manual and foot action.

The solution is aimed at providing separate or combined use of the crank-pedal drive and the lever-hand drive for an even load of the muscles of the whole body.

Known designs of various bicycle drives: these are the devices in bicycle technology using a manual drive on the front wheel. These include: A.S. N 647170 (B62M 1/12) from 18.02.79, German patent DE 3113806 C2 from 24.10.85 (B62M 1/12), European patent EP 0541136 B1 from 25.03.92 (B62M 1/16), German patent DE 19603199 C2 dated July 16, 1998 (B62M 1/14).

Their common fundamental disadvantage is the separation of energy flows from the efforts of the legs and arms to the rear and front wheels, respectively. In this case, for example, if the torque transmitted to the rear wheel shaft is greater than the rotational torque of the front wheel, then a braking force from the front wheel is inevitably generated.

Also known are devices for an additional manual drive on the carriage shaft, i. E. the efforts from the manual drive are added to the efforts of the feet on the pedals. These include a device according to the patent GB 2196586 A dated 05.05.1988 (B62M 1/12), containing a mechanism for reciprocating steering movements with a lever system for transferring them to the carriage shaft. Its disadvantages are the lack of compensators when working only with the feet and the difficulty of operating the device at a high pedaling frequency and associated levers and steering wheel. There is also known a device according to the German patent DE 3239548 C2 dated 02/04/1988 (B62M 1/12), containing a mechanism for reciprocating movements of both halves of the steering wheel with a lever system associated with an intermediate wheel, kinematically connected to the carriage shaft. The disadvantages of this device are large dimensions and constructive inconveniences associated with the execution of the rudder stem when working with your hands. This primarily applies to racing bicycles, where the cyclist's body position approaches horizontal at high speeds in the interest of reducing aerodynamic drag. In the proposed device, this cannot be done due to the design features of the rudder drive.

Characteristics (analogue) of the prototype

The closest to the claimed object in technical essence is a manual drive for a bicycle, containing an attachment to the bicycle frame. A drive lever is pivotally mounted on the mount, which has the ability to reciprocate. The sprocket and the chain leading to the additional sprocket are installed with the possibility of rotation in the longitudinal plane of the bicycle (see US 5372374 A, 13.12.1994, B62M 1/12, abstract, figures 1-6, 7 pages). In the prototype, a hand drive for a bicycle, attached to a frame, is linked by a chain drive to the rear wheel of the bicycle. The movement is due to a lever that has the ability to reciprocate and rotate the rear wheel by means of an additional sprocket mounted on the carriage-pedal mechanism.

Disadvantages of the prototype

The known manual drive has two main drawbacks, the main one of which is the inconvenience of using the hands to combine the function of movement and control of the bicycle during the use of the manual drive. This inconvenience arises due to the need to control the steering of the bicycle, holding it with one hand, while the other hand drives the hand drive lever. It is also important that when using the drive and when giving it a certain load, the cyclist will inevitably slide off the bicycle seat while riding, since with the effort put on the manual drive, the force put in the direction of the reciprocating movement of the manual drive lever, acts from the opposite side on the cyclist and, having no fixing device in front of the seat, facilitates the cyclist to slide off the bicycle seat, which greatly complicates the use of the manual drive.

Disclosure of invention

The purpose of the invention is to improve the convenience of using a manual drive, as well as the ability to adjust the involvement of various muscle groups - rowing and pushing, which will lead to the use of a greater percentage of body muscles when riding, as well as to reduce the effect of sliding off the seat of the cyclist.

The essence of the invention and its difference from the prototype

These goals are achieved by the fact that the manual drive lever (1), in contrast to the prototype, is attached coaxially to the existing bicycle handlebar shaft on a bolted or welded connection (6). At the same time, in the lower part of the drive lever, just above its attachment to the steering wheel, there is a cardan joint (7), which simultaneously allows the manual drive lever (1) to perform both back-and-forth and rotational movements around its axis. Thus, it is possible to simultaneously transmit rotational forces to the bicycle handlebars, and due to the back-and-forth movement through the cable (3), rotate the drum of the ratchet (4) mounted on the axis of the carriage-pedal mechanism of the bicycle (5), and, as a consequence, the rear wheel bike.

Partial replacement of the muscles of the rowing group with the muscles of the pushing group and vice versa occurs due to the installation of a spring (8), which, when the cyclist pulls the manual drive lever towards itself, stretches and accumulates potential energy, which is subsequently given off and thereby facilitates the pushing movement of the manual drive. which is the main one in the transfer of energy from the muscles of the arms and upper body to the rear wheel.

Application of the invention will make it possible to use not only leg muscles, but also practically all other muscles of the body when cycling. And the fact that this additional equipment can be installed on any bike within 20 minutes makes the prospects for its use enormous, since it will allow anyone, moving on a bicycle with a small additional equipment installed on it, to train up to 95 percent of their muscles.

For reference: there are currently more than one billion bicycles in service around the world.

List of drawings

Figure 1. Left side view.

Figure 2. Top view.

Figure 3. The drum of the ratchet (4) with the cables (3) and (12) wound on it.

Figure 4. Cardan joint (7).

Figure 5. Photo: side view of the realized model.

Figure 6. Photo: top view of the realized model.

Figure 7. Photo of the fastening of the manual drive to the frame in the realized model.

Figure 8. Photo of the ratchet drum.

Job

The manual drive for a bicycle works as follows: when moving (away from yourself) the manual drive lever (1), connected coaxially with the bicycle handlebar shaft, the drive lever deflects forward, bending at the cardan joint (7). The cable (3), attached on one side to the hand drive lever (1) above the cardan joint, and on the other side to the ratchet drum (4), mounted on the axle of the carriage-pedal mechanism of the bicycle (5), begins to stretch and twist the ratchet forward , thereby turning the carriage-pedal mechanism, which, in turn, turns the rear wheel (11) through the sprocket (9) and the chain (10). At the same time, turning forward, the ratchet drum winds on itself the second cable (12), which stretches the spring (13) connected to it and fixed by the second end on the frame. Thus, with the reverse movement of the drive lever (towards itself), the drive cable (3) does not sag, but winds around the ratchet drum.

To prevent the manual drive lever from bending at the cardan joint to the right or to the left and only move forward and backward, the frame of the drive lever travel stop (14) is attached to the bicycle frame. And in order to facilitate the movement of the manual drive lever (away from you) and use as many muscles as possible to give the bike movement, the drive travel stop frame (14) and the drive lever itself (1) are connected by a spring (8), which, when the drive lever moves (towards itself ) stretches and accumulates energy, giving it away when the drive lever moves (away from you).

In this case, the number of springs can be adjusted depending on which muscles you want to use to a greater or lesser extent - rowing or pushing.

When cycling only with a foot drive, the hand drive lever is released and moves forward under the influence of a spring. In this case, riding occurs as on a regular bicycle, while when pedaling with your feet, the drum of the hand drive ratchet (4) is not engaged with the carriage-pedal mechanism (5) and does not affect the hand drive lever.

Execution and materials

The hand drive lever (1) is made of a metal tube.

The travel stop frame (14) is a three-dimensional structure made of small-section metal pipes with a provided attachment point (15) to the existing bicycle frame.

Springs (8) and (13) are tension springs.

Rope (3) and (12) - ropes with a diameter of 4-6 mm.

The ratchet drum (4) is made of a standard ratchet mechanism placed in a metal drum as an axis.

Photo of a bicycle with a realized and installed additional manual drive (figures No. 5, 6, 7, 8).

Claims (5)

1. An additional manual drive for a bicycle, containing a drive lever (1) coaxially mounted on the bicycle handlebar shaft, the bending of the manual drive lever occurs when the lever moves back and forth at the cardan joint (7), the presence of a cardan joint on the manual drive lever makes it possible simultaneous reciprocating and rotary motion around the axis of the drive lever, the rotational movement of the drive around the axis provides steering of the bicycle, and the reverse-and-forward movement of the drive, the movement of the bicycle occurs when pushing the drive lever (1) away from itself by transferring energy through the cable (3) to a ratchet drum (4) and a carriage-pedal mechanism of a bicycle (5). 2. An additional manual drive according to claim 1, characterized in that the manual drive lever can be attached to the rudder shaft both on the bolted (15) and on the welded joint. 3. An additional manual drive for a bicycle, in which, in order to accumulate energy and connect an additional muscle group to the work, when the drive lever moves towards itself, a spring (8) is tensioned, installed between the upper part of the drive lever and a fixed bicycle unit, for example, a frame drive arm stop (14). 4. An additional manual drive for a bicycle, in which to prevent the hand drive lever from bending at the cardan joint to the right or left, a limiter for the hand drive lever travel (14) is installed on the bicycle frame, which makes it possible to move the hand drive lever only backwards. 5. An additional manual drive according to claim 4, characterized in that the frame of the travel stop of the manual drive lever can be attached to the bicycle frame both on a bolted (6) and on a welded joint.

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