ES1242742U - Perfect bicycle crown (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Crown perfected for bicycle, characterized in that it consists of a geared plate C, so that: on the back of the plate (C), plates welded to the axis of the bicycle are placed and on the front, inside, they go three gears, (1), (2), (3) from the bicycle frame, below the axle, a plate (4) that borders the plate (C) below, which supports the two gears, (2) and (3), these are coupled by a system that allows them to rotate on their own axis. The central gear 1, is supported by the axle (5) of the bicycle, having a thickness of 5 mm more than the gears 2 and 3. The plate (C) is welded at its rear by 4 plates (6), to the frame of the bicycle. In the crown is the pedal that will be attached to the connecting rod and connected to the shaft (5), and whose union will have a washer. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Perfect bicycle crown.

Technical sector

As expressed in the statement of this specification, the proposed invention is framed in the bicycle manufacturing sector.

Object of the invention

The present descriptive memory is contemplated within the utility model registration figure, proposing a novel system, especially aimed at improving pedaling performance on a bicycle, in the sense that less effort will be required to roll on the bicycle, starting from a bicycle crown that will provide that, with one pedal turn, the part called crown that is part of the bicycle's own gear system, can reach between 4 and 5 turns.

Background of the Invention

In a bicycle mechanism, a crown, chainring or star is a toothed element used to provide the transmission, chain or toothed belt transmission. The largest toothed wheel, and therefore the one with the largest number of teeth of each stage of reduction or speed multiplication, in the gear system of the bicycle, in which the crown is the driving wheel, is called the crown gear.

In the common mechanism of a bicycle, in the development that produces one turn of the crank driven by the pedals, the crown makes one complete turn, while in the mechanism proposed in this specification, the crown reaches between 4 and 5 turns, thus offering greater speed with less effort.

Explanation of the invention

The invention presented here refers to a perfect crown of those used in the transmission mechanism that is usually used in bicycles to create movement, and that unlike those known, the incorporation of other elements to the crown provides greater performance on the bike with less effort, which improves pedaling, since with each turn of the pedal the crown will perform between 4 and 5 turns.

The invention is presented constructively from a toothed plate (C) with a standard type measurement of 19 cm, 1 cm thick where three smaller 4 cm gears are vertically aligned on its external front part . Of the three, the first in descending order (1) will have a thickness of approximately 5 mm more than the other two (2) and (3). These smaller radius gears will be attached to the plate (4) by means of a fixing system that allows them to rotate, and that will do so when the larger gear begins to rotate. That is, the gear rotates a few degrees, it does not go around a turn, it rotates more or less a fourth or something less. While the 4 cm gear will make a full turn as it is smaller.

The gears (2) and (3) are coupled to a plate (4) that will act as their support, and that will be attached to the bicycle frame. The gear (1) is supported by the bicycle's own axle, (5) and is welded to the crown, not to the bicycle's own axle.

The plate "C" is welded to the frame of the bicycle by its rear part by means of 4 plates (6) and to the axis of the bicycle (5). Following an order in terms of its construction, this plate will be the first of the proposed system to be welded to the bicycle axle.

The pedal of the bicycle will be connected by a connecting rod and connected to the axle, and in which joint it will have a washer on the outside of the crown, only welded to the axle and the pedal welded to the axle as well.

Brief description of the drawings

Figure 1.- Front elevation view of the plate (C), and of the arrangement of the gears (1), (2) and (3) and the element as a plate (4), where the gears 2 and 3 (2), (3), are docked.

Figure 2.- Front elevation view of the plate (C), with detail of the four plates (6) through which the plate is welded to the bicycle and the bicycle axle (5).

Figure 3.- Profile view of the placement of the elements, such as the plate (C), the axis (5).

It is not considered necessary to extend the present specification for any expert in the field to understand the scope of the invention and the advantages derived from its use. The sizes, shapes, mechanisms and constituent materials of the invention may be varied to adapt them to the advantages that may derive from their specific application, provided that this does not affect the essential nature of the invention. The terms in which this report has been written should always be taken as illustrative and not limiting.

Claims (1)

1.- PERFECTED CROWN FOR BICYCLES, characterized in that it consists of a C-plate geared, so that: on the back of the plate (C) some plates welded to the bicycle axle are placed and on the front, inside, three gears, (1), (2), (3) go from the bicycle frame, below the axle, a plate (4) is welded that borders the plate (C) below, which supports the two gears, (2) and (3), these are coupled by a system that allows them to rotate on their own axis. The central gear 1 is supported by the axle (5) of the bicycle, having a thickness of 5 mm more than gears 2 and 3. The plate (C) is welded at its rear by means of 4 plates (6), to the frame of the bicycle. In the crown there is the pedal that will be coupled to the connecting rod and connected to the shaft (5), and in whose union it will have a washer.