ES1057359U - Ambilateral mechanical transmission device for bicycles and tricycles. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Mechanical device for the ambilateral transmission in bicycles and tricycles, characterized by arranging in the bushing (fig. 1) and pinion (fig. 2) of threading on the left (3) and (7) (Machine-translation by Google Translate, not legally binding)

Description

Mechanical device for transmission Ambilateral on bicycles and tricycles.

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a device mechanical for the transmission of movement in bicycles and pedal-driven tricycles, which has been conceived and performed to get important advantages in terms of effort and user comfort of bicycles and tricycles.

The device is designed so that the cyclist can, in each pedaling, recover the foot free of effort in direct ascent, and helped by the other foot in action, so that when one foot exerts the driving action by lowering the pedal, it produces the elevation of the other pedal, describing an anterior arc of about 120 degrees, without having to do the recovery with a posterior arc of more than 210 degrees, which is what happens in the current pedaling, which they call "in round".

This new mechanical device is based on major changes in various parts of the transmission mechanism of bicycles: Thus: 1 .- In the hub of the rear wheel you will be gives, on the left side (where until now there is no pinion) a threaded to the left for admission of a freewheel that also adapts to the left thread, which makes it possible to have two Freewheels, the one on the right with threaded on the right (as always), and the left with threaded on the left. 2nd .- Two transmitting chains of the turning movement, one, right, on your usual place joining the right pinion with the plate – connecting rod and pedal; and another chain joining the pinion on the left with a new game of crankset and pedal located on the left. 3rd - To obtain the alternative movement of raising and lowering the pedals, we use, two parallel shafts with cylindrical gears, straight or helical, of equal diameter, mounted on bearings and guide bearings, which we place inside the box bottom of the bicycle frame. 4th.- Some covers, for close the sides of the bottom bracket. 5th - A double deck that Wraps each of the two parts of the entire device, for water and shock dust protection, and that of the user, for greater comfort and cleanliness and safety, in the appropriate dimensions to each type of vehicle to suit the user.

Background of the invention

In the technical sector of the mechanics of the bicycle, there are several procedures to achieve movement alternative of the pedals using levers, cables, pulleys rockers, racks and additional pinion set, which complicate the normal structure of the bicycle, its classic shape and adequate weight, which means serious inconvenience and higher costs in manufacturing, assembly and maintenance. Looking for a solution to these inconveniences, I found the solution in the gear, two equal and parallel axes, and I requested dated August 7, 2003, Utility Model number U200301896, for "Device ambilateral and alternative traction for bicycles ", whose The concession appears in the BOPI of March 1 of the current year 2004. But this Model has weak gears and adjustments insufficient to bottom brackets with normal measurements and generalized, so it is necessary to modify the mechanism with new more robust elements that guarantee operation effective and permanent.

Description of the invention

This new mechanical device to get more effectively using the bicycle and tricycles with the alternative movement of the feet, presents a new structure, based on achieving, in addition to the alternative movement, give it a strength that guarantees the proper functioning of the vehicle and greater safety, comfort and cleanliness for the user.

To get the alternative movement you It has a pair of chains that move on a pair of sprockets and a pair of crankset, located one on each side of the bike: Those on the right side in their usual place, the pinion right, the chain and the crankset, in the part right, where always. The left pinion on the left side from the same rear wheel hub, the crankset left to the left of the box; and the left chain over the Left pinion and crankset.

It is necessary to warn that as the movement of breakthrough for the pinions, chain and plate is always dextrógiro (as clockwise), on the right side of the bike, It turns out that the same forward movement of the pinion. chain and plate on the left side is the opposite of the previous one, sinistrógiro, that is to the left so it is necessary to put in the hub and the left pinion the left threading so that at pull the pinion chain, it does not unscrew and leave the bushing, but it is fully tightened.

To achieve strength and strength each axis is given bottom bracket the same dimensions (16 mm. diameter or thickness) as they have the current axles, generally used in the bicycles of all the world; but as our axis is double, and it goes parallel geared, the study of the distance between centers, forces us to use special bearings that serve to accommodate the bearings and shafts and keep the gears in place and optimal dimensions, forming a block.

Taking into account the generalized measures of bottom brackets, (about 68 millimeters in length, 35 mm in inner diameter and 41 outer diameter), to apply This new device on any type of bicycle has been provided that the bearings, fit tightly in the measurements of the box (35 mm inside). And as the bearing measures are: 22 mm in length, another 22 mm outside diameter and 16 mm of internal diameter, and the length of the box is 68 mm, both bearings occupy 44 millimeters (22 at each end of the box) leaving a central space of 24 millimeters for the crowns of axle gear, so these crowns will be 20 mm. leaving the space of the remaining 4 mm for placement of washers

To complete the description and with in order to help a better understanding of the characteristics of the invention is accompanied by the present specification of a game of planes, based on whose figures will be more easily understood, the innovations and advantages of the mechanical device object of the invention.

Brief description of the drawings

Figure 1.- Shows a perspective view of the Rear wheel hub with left hand thread.

Figure 2.- Shows a perspective view of the Sprocket on the left with threaded on the left.

Figure 3.- Shows views, in perspective of the axes (A) of the right part and (B) of the left part, and their gears and vertical section of each of these.

Figure 4.- Shows a perspective view of the guide bearings (A) on the right side and (B) of the left part, and location of the clamping screw.

Figure 5.- Shows a perspective view of the side covers (A) right and (B) left. And a view of front of (A) marking the place of the clamping screw.

Figure 6.- Shows a sectional view Vertical needle roller bearings.

Figure 7.- Shows a vertical section view of the bottom bracket with through holes for screws subjection.

Figure 8.- Shows a vertical section view of the set of parts contained in the bottom bracket and located in its place of operation: the geared shafts, the guide bearings, bearings, covers clamping screws and connecting rods.

Figure 9.- Shows a perspective view of the double deck or chain guard.

In these figures the references correspond to:

one.-

Wheel hub rear

two.-

Normal threading bushing right

3.-

New thread, left bushing

4.-

Nuts rear wheel axle attachment

5.-

Wheel axle rear

6.-

Sprocket for the side Left bushing with threaded left

7.-

Threaded to left on the pinion

8.-

Axis (A) of the Right part

9.-

Shaft gear (TO)

10.-

Axis (B) of the left side

eleven.-

Shaft gear (B)

12.-

Bearing-guide (A) of the right part

13.-

Bearing (B) of the left part

14.-

Screw right hand clamp

fifteen.-

Screw left hand clamp

16.-

Washers between gear and bearings (A) and (B)

17.-

Side cover from the right side box (A)

18.-

Side cover from the left side of the box (B)

19.-

Box bottom bracket

twenty.-

Bearing Right part

twenty-one.-

Bearing left side

22.-

Crankset Right part

2. 3.-

Crankset left side

24.-

Double deck or chain guard (A) right and (B) left.

Description of a preferred embodiment

As immediately notice the bushing and the pinion we apply to your left side, they are normal and known, except that a thread is used for coupling left as a novelty Figure 1 - (3) and Figure 2 - (7), and to use also in a new place (the left part of the wheel rear).

The axes (Fig. 3) show us a gear special, because the crown of teeth is not complete, since it suppress one of the valleys leaving two teeth together, in order to that, when pedaling, the pedal that goes up does not exceed the vertical, since the attack zone to drive the vehicle is moving towards in front of.

The length of the axes is calculated so that the distance between the crowns of the dishes, where the chains, be the normal one (between 85 and 90 millimeters) which is the same distance we have between the crowns of the pinions. And also the length of the axes is the precise one to form the packages of bearings (12 and 13), bearings (20 and 21) and gears (9 and 11), inside the bottom bracket.

Bearing diameters are calculated (12 and 13) to enter tightly inside the box (35 millimeters, standardized measure), and with openings, openwork or 22 mm internals for bearing housing (20 and twenty-one).

The sides of the box (19) are covered with the covers (17 and 18) that receive the passage of the screws (14 and 15) that serve to join and fix the cover tightly (17 and 18) the box (19) and the bearings (12 and 13), forming a strong block soldier to the bicycle frame and in the same place where all the bikes have the axle and bottom bracket, so the cyclist you will find more comfort with the alternative pedaling down and climb a 150 degree arc with your feet, which with pedaling circular moving the feet in round 360 degrees.

The double deck or chain guard (Fig. 9) is presents as a complement to the set and the novelty of covering the two parts of the present mechanical device that I present and have dinner, with the fender the space occupied by the wheel rear, to rid the cyclist of splashes and possible friction With the rear wheel.

Claims (4)

1. Mechanical device for the ambilateral transmission in bicycles and tricycles, characterized by having on the hub (Fig. 1) and pinion (Fig. 2) of screwed to the left (3) and (7). 2. Mechanical device for the ambilateral transmission in bicycles and tricycles, according to claim 1, characterized by having a bottom bracket (Fig. 7), which houses two guide bearings (Fig. 4 (A)) and (b)), two bearings

 \ hbox {(Fig. 6)} 

and two equal and parallel shafts (Fig. 3 (A) and (B)) and geared in special gear with a double tooth (9) and (11) to prevent complete rotation of the pedal and move only up and down. Each axle rotates within its bearing, (20 and 21), and each of these, within its own bearing (12) and (13). 3. Mechanical device for the ambilateral transmission in bicycles and tricycles, according to the preceding claims, characterized by having two covers (Fig. 5 (17 and 18)), to close the sides of the bottom bracket, allowing the passage of the ends of the shafts (8) and (10), and with threaded holes for applying fastening screws (14 and 15) of the covers with the housing (19) and the guide bearings (12 and 13). 4. Mechanical device for ambilateral transmission in bicycles and tricycles, according to previous claims, characterized by having a double cover or chain guard (Fig. 9), which joins the frame forks and the fender for protection of the mechanism and the user .