ES1073498U - EXTENSIBLE BIKE ROD. - Google Patents

Abstract

1. Extendable bicycle crankset characterized by being made up of two parts, one part is fixed (1) and the other part is mobile (2). It also consists of a button (3) that connects parts (1) and (2) and a spring (10) is incorporated inside the fixed part (1) that links it with the moving part (2) and another spring (4) inside the mobile part (2) but coupled to the button (3). In the final area of the moving part (2), the pedal (9) is coupled, using any of the conventional systems available on the market, as well as the connecting screw (7) of the fixed part (1) with the frame. of the bicycle (11), the nut (6), or the washer (5), which can also be any of the conventional existing on the market.

Description

Extensible bike crank.

Object of the invention

The present invention, as expressed in the First page of this report, refers to a moving system of extendable bicycle crank.

In this new system the connecting rod is replaced conventional one-piece, by a connecting rod formed by two pieces that fit into each other.

With this new system, the length of the connecting rod it can be increased or decreased with a simple movement of the foot, without any effort, being circulating and aesthetically I hardly know appreciate this device.

Background of the invention

There is no knowledge that this type exists of connecting rods, although there are others that claim the same result, but they are made up of complicated devices to install and to drive.

Document 1025490 proposes a connecting rod extensible that attaches to the original connecting rod, in which you have to Perform a series of drills and attach fixing screws. This system is extremely complex, not very aesthetic and with the inconvenience of being the whole mechanism in sight and being able to get hooked accidentally the pants on the lever that drives the mechanism.

Similarly, document 1002777 proposes a perfected connecting rod that what it does is lengthen the length of the connecting rod fixed and unchanged during the march.

Description of the invention

The innovation that you want to introduce in the mechanism described above and which is the subject of the patent of invention that is intended to be recorded is the following:

Replace the traditional bicycle crank in one piece and that is normally used, by another connecting rod composed of two pieces, a fixed part (1) and another moving part (2). The piece (1), is fixed in terms of longitudinal displacement, but not in the rotational sense and is connected to the plate (12), to the frame or frame of the bicycle (11) and the connecting rod on the opposite side, through the fixing screw (7). The other piece (2) that is mobile and in which the pedal (9) is attached, it is housed in the inside the piece (1) and can take two positions with respect to this, with which two different lengths of the connecting rod, getting two different lengths of the lever arm That is what we want.

For connection and coupling between the two pieces, a button (3) is installed, which locks them to make them temporarily in solidarity in either position extreme, normal position (A) or extended position (B). You can also unlock the two pieces, to allow the sliding of the moving part (2) inside the fixed part (1) and be able to move from one position to the other.

The two parts of the connecting rod, the fixed part (1) and The mobile part (2) is linked by a spring (10). When the pieces (1) and (2) are in "Normal position A" (Fig. 1), the spring (10) is a little tense. When (1) and (2) it placed in "Position B" (Fig. 3), the spring (10) is extended and tense much more, trying to regain its equilibrium position.

The button (3) has a spring (4) incorporated. When the two parts of the connecting rod (1) and (2) meet at either of positions A or B (Fig. 2), the spring (4) is keeps a little tense; but throughout the journey between the position A and position B of the cranks, that is, when the button (3) is pressed, then the spring (4) is fully tensioned, pressing the washer (5) and pushing the button (3) out.

To complete the description of the invention in issue and in order to help a better understanding of the characteristics thereof, is accompanied by this report descriptive, a series of non-limiting example drawings, in which several positions have been drawn between the two pieces of the connecting rod; a front and a rear view of each of the pieces; sections and details of all crank components object of the invention and at the same time describe an embodiment Preferred of the invention.

Brief description of the drawings

Fig. 1: Cross section of the set formed by the pedal (9); the moving part (2) of the connecting rod; the fixed part (1) of the connecting rod and the frame of the bicycle (11). The two pieces of the connecting rod are located in what we call "position A", or be, with the shortest total connecting rod length.

Fig. 2: Cross section of the set formed by the pedal (9); the moving part (2) of the connecting rod; the fixed part (1) of the connecting rod and the frame of the bicycle (11). The two pieces of the connecting rod are located in an "intermediate position between the A and B ".

Fig. 3: Cross section of the set formed by the pedal (9); the moving part (2) of the connecting rod; the fixed part (1) of the connecting rod and the frame of the bicycle (11). The two pieces of the connecting rod are located in what we call "position B", or be, with the longest total length of connecting rod.

Fig. 4: Front view (1b) and rear view (1c) of the fixed part of the connecting rod (1), as well as a section (1a) of the same, in which the drills for the passage of the clamping screw of the connecting rod (7) and the push button (3) in its two positions and in their journey between both ..

Fig. 5: Front view (2b) and rear view (2c) of the moving part of the connecting rod (2), as well as a section (2a) of the same, in which they are appreciated: the holes for the passage of clamping screw (8) for holding the pedal (9) and the button (3).

Fig. 6: Cross section of the connecting rod by the button (3) in Positions "A" and "B", in which they appreciate the springs (4) and (10) and their position with respect to the whole. The projections (13) in the fixed part (1) and the channels (14) in the moving part (2) to facilitate the coupling, the fixing and sliding between both parts (1) and (2).

Fig. 7: Cross section of the connecting rod by the button (3) in an intermediate position between "A" and "B", which shows the springs (4) and (10) and their position with respect to to the whole The projections (13) in the fixed part are also appreciated (1) and the channels (14) in the moving part (2) to facilitate the coupling, fixing and sliding between (1) and (2).

The previous figures describe the following numbered items:

one)

Fixed part of the connecting rod (1) that is attached to the frame the bicycle (11).

2)

Moving part of the connecting rod (2) in which the pedal (9).

3)

Locking button between the fixed part (1) and the mobile (2).

4)

Push button spring.

5)

Washer.

6)

Fastening nut.

7)

Union screw and link between the two connecting rods, the set of plates (12) and the frame (11) of the bicycle.

8)

Pedal fixing screw (9) to the moving part of the connecting rod (2).

9)

Pedal.

10)

Link spring between the fixed part of the connecting rod (1) and the mobile (2).

eleven)

Bicycle frame.

12)

Game of dishes.

13)

Side highlights of the fixed part (1) for coupling in (14).

14)

Channels of the moving part (2) for coupling and sliding of the projections (13) of the fixed part (1).

fifteen)

Washer support pin.

16)

Screw drill for the passage of the pin (fifteen)

17)

Screw head that is threaded into it to be able to assemble and disassemble

Description of a preferred embodiment

The mechanical realization of the bicycle crank extensible, it can be done among other possible solutions, by coupling a push button device (3) which is the fundamental piece, since it unites and solidly blocks the two parts of the connecting rod (1) and (2), in either of the two extreme positions, position A of normal length of the connecting rod for ride, and the position B, with longer connecting rod length (lever arm), for overcome greater difficulties with less effort.

The button (3) allows to lock and unlock the two parts of the connecting rod in positions A and B. It also drives and facilitates the sliding of the moving part (2) of the connecting rod inside of the fixed part (1), during the journey between positions A and B.

When we want to modify the length of the connecting rod, we place the pedal horizontally to the ground, press the device (3) with the heel or with the toe of the shoe and the at the same time we push the pedal (9) forward but keeping it parallel to the ground, which will lengthen the crank, or let recover your normal position (if extended). The part The connecting rod's mobile will move from position A to position B or vice versa. During the journey between A and B, we stopped pressing the button (3) to allow when the parts arrive at said positions, the button (3) locks the two parts of the connecting rod to the be driven by the spring (4) to the locked position.

Claims (1)

1. Extensible bike crank characterized by being essentially two parts, one of the parts is fixed (1) and the other part is mobile (2). It also has a button (3) that connects the pieces (1) and (2) and a spring (10) is incorporated inside the fixed part (1) that links it with the moving part (2) and another spring (4) inside the moving part (2) but coupled to the button (3). In the final area of the moving part (2) the pedal (9) is coupled, using any of the conventional systems available on the market, as well as the connecting screw (7) of the fixed part (1) with the frame of the bicycle (11), the nut (6), or the washer (5), which can also be any of the conventional ones on the market.