CN211196497U

CN211196497U - Bicycle booster crank

Info

Publication number: CN211196497U
Application number: CN201921441135.6U
Authority: CN
Inventors: 邵金生
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-07
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses bicycle reinforcement crank includes preceding curved bar, back straight-bar, preceding straight-bar that end to end in proper order, and preceding curved bar sets up pedal shaft hole with the junction of back curved bar, and preceding straight-bar sets up well shaft hole with the junction of back straight-bar, and the axis in pedal shaft hole is located the coplanar with the axis in well shaft hole, and preceding curved bar, back straight-bar, preceding straight-bar are located the coplanar. The utility model discloses bicycle reinforcement crank, simple structure, it is laborsaving to ride.

Description

Bicycle booster crank

Technical Field

The utility model belongs to the bicycle field, concretely relates to bicycle pedal crank.

Background

The bicycle pedal crank is a key component of a bicycle power system, the existing cranks are straight handles, when the crank runs, a crank pedal shaft has two blind points, namely a highest point and a lowest point, in the motion process from the highest point to the lowest point, the torque is sequentially increased from the blind point at the highest point downwards, when the crank runs to the middle, the pedal direction of a person is perpendicular to the direction of a crank rod body, the torque is the largest, then the torque is gradually reduced, and then the torque blind point at the lowest point is reached.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a simple structure, laborsaving bicycle reinforcement crank.

The utility model discloses bicycle reinforcement crank, including preceding curved bar, back straight-bar, the preceding straight-bar that end to end in proper order, the junction of preceding curved bar and back curved bar sets up pedal shaft hole, preceding straight-bar sets up well shaft hole with the junction of back straight-bar, the axis in pedal shaft hole with the axis in well shaft hole is located the coplanar, preceding curved bar, back straight-bar, preceding straight-bar are located the coplanar.

The utility model discloses bicycle reinforcement crank, wherein, the junction of preceding curved bar and preceding straight bar is first circular arc transition pole, and the axis of first circular arc transition pole is the pitch arc, and pitch arc radius is 20 mm.

The utility model discloses bicycle reinforcement crank, wherein, the junction of back curved bar and back straight bar is second circular arc transition pole, and the axis of second circular arc transition pole is the pitch arc, and pitch arc radius is 25 mm.

The utility model discloses bicycle reinforcement crank, wherein, the axis of preceding curved bar is the pitch arc that the radius is 300 mm.

The utility model discloses bicycle reinforcement crank, wherein, the axis of back curved bar is the pitch arc that the radius is 110 mm.

The utility model discloses bicycle reinforcement crank, wherein, when pedal shaft hole was located the peak, the centre bore was located the minimum, the axis of preceding straight-bar was 10 with the angle that the horizontal direction becomes.

The utility model discloses bicycle reinforcement crank, wherein, when pedal shaft hole is located the peak, well shaft hole is located the minimum, the angle that the plane at the axis place in the axis in pedal shaft hole and well shaft hole and the axis of back straight-bar become is 36.

The utility model discloses bicycle reinforcement crank lies in with prior art difference the utility model discloses bicycle reinforcement crank simple structure, at the peak, receive the decurrent component force effect of crank self gravity and each pole portion, need not big power and just can produce big moment, in-process from the peak to the minimum in pedal shaft hole, it is perpendicular with people's pedal direction to have the pole all the time, moment is the biggest, and adopt this kind of quadrangle structure, no matter at the peak, minimum or intermediate position, receive the component force effect of each pole portion, the crank can both obtain the best moment, save strength.

The bicycle power-increasing crank of the present invention will be further explained with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the bicycle power-increasing crank of the present invention.

Detailed Description

As shown in fig. 1, the utility model discloses bicycle reinforcement crank includes preceding curved bar 1, back curved bar 2, back straight-bar 3, preceding straight-bar 4 that end to end links to each other in proper order, and preceding curved bar 1 sets up pedal shaft hole 5 with the junction of back curved bar 2, and preceding straight-bar 4 sets up well shaft hole 6 with the junction of back straight-bar 3, and the axis in pedal shaft hole 5 and the axis of well shaft hole 6 are located the coplanar, and preceding curved bar 1, back curved bar 2, back straight-bar 3, preceding straight-bar 4 are located the coplanar.

As shown in fig. 1, the axis of the front curved bar 1 is an arc with a radius of 300mm, the axis of the rear curved bar 2 is an arc with a radius of 110mm, the joint of the front curved bar 1 and the front straight bar 4 is a first arc transition bar 7, the axis of the first arc transition bar 7 is an arc, and the radius of the arc is 20 mm; the junction of back curved bar 2 and back straight-bar 3 is second circular arc transition rod 8, and the axis of second circular arc transition rod 8 is the pitch arc, and the pitch arc radius is 25 mm.

As shown in fig. 1, the bicycle power-increasing crank of the present invention has a structure in which, when the pedal shaft hole 5 is located at the highest point and the center shaft hole 6 is located at the lowest point, the angle a formed by the axis of the front straight rod 4 and the horizontal direction is 10 °, and the angle B formed by the plane where the axis of the pedal shaft hole and the axis of the center shaft hole are located and the axis of the rear straight rod 3 is 36 °.

The utility model discloses bicycle reinforcement crank, at the peak, receive the decurrent component effect of crank self gravity and each pole portion, need not big power and just can produce big moment, in-process from the peak to the minimum in pedal shaft hole, it is perpendicular with people's pedal direction to have the pole all the time, moment is the biggest, and adopt this kind of quadrangle structure, no matter at peak, minimum or intermediate position, receive the component effect of each pole portion, the crank can both obtain the best moment, sparingly strength. Compared with the crank with a straight handle, the utility model can save 50% of force at the highest point.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. A bicycle reinforcement crank which is characterized in that: including preceding bent lever (1), back bent lever (2), back straight-bar (3), preceding straight-bar (4) that end to end in proper order, preceding bent lever (1) sets up pedal shaft hole (5) with the junction of back bent lever (2), preceding straight-bar (4) sets up shaft hole (6) with the junction of back straight-bar (3), the axis of pedal shaft hole (5) with the axis of shaft hole (6) is located the coplanar, preceding bent lever (1), back bent lever (2), back straight-bar (3), preceding straight-bar (4) are located the coplanar, preceding bent lever (1) is first circular arc transition pole (7) with the junction of preceding straight-bar (4), back bent lever (2) is second circular arc transition pole (8) with the junction of back straight-bar (3).

2. The bicycle power crank of claim 1, wherein: the axis of the first arc transition rod (7) is an arc line, and the radius of the arc line is 20 mm.

3. The bicycle power crank of claim 2, wherein: the axis of the second arc transition rod (8) is an arc line, and the radius of the arc line is 25 mm.

4. The bicycle power crank of claim 3, wherein: the axis of the front curved rod (1) is an arc line with the radius of 300 mm.

5. The bicycle power crank of claim 4, wherein: the axis of the rear curved rod (2) is an arc line with the radius of 110 mm.

6. The bicycle power crank of claim 5, wherein: when the pedal shaft hole (5) is positioned at the highest point and the middle shaft hole (6) is positioned at the lowest point, the angle A formed by the axis of the front straight rod (4) and the horizontal direction is 10 degrees.

7. The bicycle power crank of claim 6, wherein: when the pedal shaft hole (5) is positioned at the highest point and the middle shaft hole (6) is positioned at the lowest point, the angle B formed by the plane where the axis of the pedal shaft hole and the axis of the middle shaft hole are positioned and the axis of the rear straight rod (3) is 36 degrees.