RU114305U1 - BIKE WITH A MULTIPLE TIME TRANSMISSION SPEED - Google Patents

Abstract

1. A bicycle containing a frame (1), a handlebar, a front axle and a hub with a wheel, a rear axle (2) and a hub (3) with a wheel, a gear or gears with a ratchet mechanism (4), a chain transmission from a pedal drive to a gear ( 5) or the gears of the ratchet mechanism (4) located on the rear hub (3), additionally the gear (5) or gears of the ratchet mechanism (4) are mated with the rear hub (3) through a gear with a toothed wheel which is in internal engagement with the first gear wheel (6) coaxially mated through the bearing with the first axle (8) rigidly coupled with the frame (1), characterized in that the first gear wheel (6) is in external gearing with the second gear wheel (7) coaxially mated with a washer (10) of a larger diameter and through a bearing with a second axis rigidly coupled to the frame (1); the second gear wheel (7) is in external gearing with the toothed wheel (11) of the overrunning clutch with a ratchet, rigidly mated with the bushing (3) of the rear wheel. ! 2. A bicycle according to claim 1, characterized in that in case of disengagement of the first gear wheel (6) or the first and second gear wheels (6, 7), the transmission of torque to the rear wheel hub is provided by the third gear wheel (13) having: ! external gearing with overrunning clutch gear (11); ! internal gearing with toothed wheel (5) gears with toothed wheel; ! coaxial mating with a washer of a larger diameter and through a bearing with a third axis (14) rigidly coupled with the frame (1).

Description

The technical field to which the utility model relates.

The utility model relates to bicycle transmissions with spur gears.

State of the art

As the closest analogue (prototype), a bicycle is disclosed in patent RU 2318571, which contains a frame, a steering wheel, a front axle and a hub with a wheel, a rear axle and a hub with a wheel, gear or gears with a ratchet mechanism, a chain transmission from the pedal drive to the gear or ratchet gears located on the rear hub. Additionally, the gear or gears of the ratchet mechanism are coupled to the rear hub via a gear with a gear wheel that is internally engaged with the first gear wheel, coaxially mated through a bearing with a first axis rigidly mated to the frame.

However, in the normal direction of pedal rotation, the rotational speed of the ratchet mechanism associated with the gear chain and the rotational speed of the bicycle wheel are the same. This prevents the obtaining of a technical result in the form of an increased speed of rotation of the bicycle wheel compared to the speed of rotation of the gear of the ratchet mechanism.

Also from the prototype (figure 3) it is known that with the opposite direction of rotation of the pedals, the transmission of torque to the rear wheel hub is provided by a gear wheel having:

external gearing with a gear wheel of the freewheel;

internal gearing with a gear wheel of a gear with a gear wheel;

coaxial conjugation through a bearing with an axis rigidly conjugated with the frame.

Utility Model Disclosure

To increase the speed of rotation of the wheel of a bicycle compared to the speed of rotation of the gears of the ratchet mechanism, it is proposed to improve the bike, which contains a frame, a steering wheel, a front axle and a hub with a wheel, a rear axle and a hub with a wheel, gear or gears with a ratchet mechanism, a chain drive from a pedal to the gear or gears of the ratchet mechanism located on the rear hub. Additionally, the gear or gears of the ratchet mechanism are coupled to the rear hub via a gear with a gear wheel that is internally engaged with the first gear wheel, coaxially mated through a bearing with a first axis rigidly mated to the frame.

Signs that distinguish from the closest analogue are signs that the first gear wheel is in external gear engagement with the second gear wheel, coaxially mating with a washer of a larger diameter and through a bearing with a second axis, rigidly mating with the frame; the second gear is in external gear mesh with the gear of the freewheel with a ratchet rigidly mated to the rear wheel hub.

In the particular case of the bicycle in the event of disengagement of the first gear wheel or the first and second gears, the transmission of torque to the rear wheel hub is provided by a third gear wheel having:

external gearing with a gear wheel of the freewheel;

internal gearing with a gear wheel of a gear with a gear wheel;

coaxial conjugation with a larger diameter washer and through a bearing with a third axis rigidly conjugated with the frame.

Brief Description of the Drawings

Figure 1 shows a side view, figure 2 is a top view, where 1 is the frame, 2 is the rear axle, 3 is the rear hub, 4 is the ratchet, 5 is the gear with the gear wheel, 6, 7 are the first and second gears , 8, 9 - the first and second axes with sliding bearings, 10 - the washer, 11 - freewheel with gear, 12 - freewheel ratchet, 13 - gear with sliding bearing and third axis 14.

Utility Model Implementation

Frame 1 serves as a frame for interfacing all other parts with it and with each other.

The rear axle 2 is used to slide along it through the bearings of the rear hub 3.

The rear hub 3 is designed for fastening the rear wheel, pairing with the ratchet 4 and the freewheel 11.

The ratchet 4 is designed to transmit torque to the rear hub 3 or to freely rotate the gear with the gear 5, respectively, when rotating in one or the other direction.

A gear with a gear 5 participates in a chain transmission and transmits torque through the internal gearing to the first gear 6.

The first gear 6 serves to transmit torque through an external gear to the second gear 7.

The second gear 7 serves to transmit torque through an external gear engagement of a freewheel with gear 11.

The first and second axes with sliding bearings 8, 9 provide rotation and operability of the first and second gears 6, 7.

The washer 10 is designed to fix the freewheel with the gear 11 in a position that ensures the efficiency of the gearing.

One-way clutch with gear 11 transmits the torque from the second gear 7 to the sleeve 3 with, in particular, tripled speed compared to the speed of rotation of the gear with gear 5 with the ratio of the number of teeth of gears 5 and 11 as 3: 1 .

Losing in friction losses in gearing, we get a much more significant gain in speed.

Instead of two gears 6, 7, only one 13 can be used, which is meshed with 5 and 11 when the gear wheel 6 is disengaged. The third gear wheel 13 provides torque transmission to the sleeve 3 when the pedals are rotated in the opposite direction to the usual one. When gears 6 and 7 are engaged, the third gear 13 is disengaged and not used. In this situation, the rotational moment of the sleeve 3 is transmitted in the usual, familiar direction of rotation of the pedals.

The third gear 13 with its sliding bearing and third axis 14 may be completely absent.

Thus, when a constant speed of rotation of the pedals is reached and the torque is transmitted to the gears or gears, ceteris paribus, the speed of rotation of the rear hub compared with the speed of rotation of the gears will be several times increased.

Claims (2)

1. A bicycle containing a frame (1), a steering wheel, a front axle and a hub with a wheel, a rear axle (2) and a hub (3) with a wheel, pinion or gears with ratchet mechanism (4), a chain drive from the pedal drive to the pinion ( 5) or the ratchet gears (4) located on the rear hub (3), additionally the gear (5) or ratchet gears (4) are mated to the rear hub (3) through the gear with the gear wheel, which is in internal gearing with the first gear the wheel (6), coaxially mated through the bearing with the first axis (8), rigidly mating with a frame (1), characterized in that the first gear wheel (6) is in external gear mesh with the second gear wheel (7), coaxially conjugated with a washer (10) of a larger diameter and through a bearing with a second axis rigidly coupled with the frame (one); the second gear wheel (7) is in external gear engagement with the gear wheel (11) of the freewheel with a ratchet rigidly coupled to the rear wheel hub (3). 2. The bicycle according to claim 1, characterized in that in the case of disengagement of the first gear wheel (6) or the first and second gears (6, 7), the transmission of torque to the rear wheel hub is provided by a third gear wheel (13) having: external gearing with a gear wheel (11) of the freewheel; internal gearing with a gear wheel (5) gears with a gear wheel; coaxial conjugation with a washer of a larger diameter and through a bearing with a third axis (14) rigidly conjugated with the frame (1).