CN202006865U

CN202006865U - Bicycle crank claw and bicycle fluted disc and crank assembly comprising same

Info

Publication number: CN202006865U
Application number: CN2011200236938U
Authority: CN
Inventors: 许家玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-25
Filing date: 2011-01-25
Publication date: 2011-10-12
Anticipated expiration: 2021-01-25

Abstract

The utility model provides a bicycle crank claw and a bicycle fluted disc and crank assembly comprising the same. The bicycle fluted disc and crank assembly consists of a bicycle fluted disc, the bicycle crank claw and a crank, the bicycle crank claw is connected between the crank and the bicycle fluted disc so that the crank is fixedly disposed on the bicycle fluted disc, the bicycle crank claw consists of four connecting portions, each connecting portion extends outwards from the center of the bicycle fluted disc and is fixedly disposed on the bicycle fluted disc, an included angle is formed between each two adjacent connecting portions, and each two included angles are identical. The connecting portions can be radially arrayed with unequal distances by means of changing positions of the connecting portions, and the bicycle crank claw and the bicycle fluted disc and crank assembly comprising the same are suitable for realizing connection and assembly of non-circular bicycle fluted discs.

Description

Bicycle crank pawl and the bicycle crank crank group that comprises this bicycle crank pawl

Technical field

The utility model relates to a kind of bicycle crank group, refers to a kind of bicycle crank pawl and the bicycle crank group that comprises this bicycle crank pawl that is applicable to non-circular fluted disc especially.

Background technology

It is circular that traditional bicycle crank mostly is, when assembling crank and fluted disc, can offer several knock holees at fluted disc, and installing sets firmly the attaching parts of a plurality of equidistant radial arrangement between crank and fluted disc, attaching parts and knock hole are set firmly, in order to connecting crank and fluted disc, as described in patents such as TaiWan, China I329087 or TaiWan, China 371441.

Yet, existing bicycle crank not only has circular fluted disc, the fluted disc that other non-circular shape is also arranged, as US513589, the bicycle crank that patent such as US4865577 or US5549314 is disclosed, in existing various non-circular fluted discs, the still attaching partss of commonly using equidistant radial arrangement that adopt of the connection mode of its fluted disc and crank more, make fluted disc can't change the position of knock hole arbitrarily according to its external form, and the profile of fluted disc is limited to some extent, in addition, for the position of keeping knock hole sets firmly for the attaching parts assembling, this fluted disc materials that keep most of face territory make fluted disc that the heavier problem of weight be arranged again more.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of bicycle crank group pawl.

For reaching above-mentioned purpose, the utility model provides a kind of bicycle crank pawl, described bicycle crank pawl is assembled in non-circular bicycle crank, bicycle crank has a minor axis, minor axis is arranged in the center of bicycle crank, minor axis is positioned at the weakness of diameter of bicycle crank, and bicycle crank is formed with four location divisions; Described bicycle crank pawl comprises four connecting portions, each connecting portion has first end and second end, first end interconnects and sets firmly, second end is assembled respectively and is fixedly arranged on a wherein location division, first end is around the center of bicycle crank, be formed with an angle between the per two adjacent connecting portions, described angle comprises relatively and adjacent angle, the size of each angle and its adjacent angle big or small different.

As the preferred version of above-mentioned a kind of bicycle crank pawl, per two relative corner dimensions equate in the wherein said angle.

As the preferred version of above-mentioned a kind of bicycle crank pawl, wherein said connecting portion is not parallel to minor axis, and minor axis is arranged in wherein two relative angles.

As the preferred version of above-mentioned a kind of bicycle crank pawl, the equal in length of wherein said connecting portion.

As the preferred version of above-mentioned a kind of bicycle crank pawl, two angles that two angles that wherein said minor axis wore did not wear greater than minor axis.

A kind of bicycle crank crank group comprises above-mentioned bicycle crank pawl, and described bicycle crank crank group also comprises:

One non-circular bicycle crank, it has a minor axis, and minor axis is arranged in the center of bicycle crank, and minor axis is positioned at the weakness of diameter of bicycle crank, and bicycle crank is formed with four location divisions, and second end of connecting portion is fixedly arranged on a wherein location division respectively;

One crank, the one end is fixedly arranged on the bicycle crank pawl, and the other end radially extends.

As the preferred version of above-mentioned a kind of bicycle crank crank group, be formed with a deviation angle between wherein said crank and this minor axis, deviation angle is between 0 degree is spent to 25.

Bicycle crank pawl provided by the utility model can be for being connected between crank and the bicycle crank, wherein, this angle with its adjacent corner dimension different, the position that makes connecting portion is not equidistant radial arrangement, can be for being applicable to non-circular bicycle crank, in order to preferably to connect and to support bicycle crank.

Description of drawings

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is the block diagram of the suitable bicycle crank of the utility model;

Fig. 3 is a three-dimensional front view of the present utility model;

Fig. 4 is the front view of another embodiment of the utility model.

[primary clustering nomenclature]

1: bicycle crank 21: connecting portion

11: 211: the first ends of minor axis

111: 212: the second ends of minor axis end points

12: center 22,22 ': angle

13: location division 3: crank

The specific embodiment

Below will the effect that architectural feature of the present utility model and expection thereof are reached be described by embodiment, be not in order to limit the scope of protection of the present utility model.

Please refer to Fig. 1 to Fig. 3, the utility model provides a kind of bicycle crank crank group, comprises a bicycle crank 1, a bicycle crank pawl and a crank 3.

Bicycle crank 1 is non-circular bicycle crank, wherein bicycle crank 1 may be ellipse, or also can be other various external forms, bicycle crank 1 has a minor axis 11, minor axis 11 wore the center 12 of bicycle crank, and the weakness of the diameter that is positioned at bicycle crank 1, that is, the length of minor axis 11 in bicycle crank 1 is the shortest diameter of bicycle crank 1.Bicycle crank 1 is formed with four location divisions 13, and wherein each location division 13 includes a knock hole, and in other possible embodiment of the utility model, each location division 13 also may include detent or projection.

This bicycle crank pawl has four connecting portions 21, and each connecting portion 21 has one first end 211 and one second end 212, and each first end 211 interconnects and sets firmly, and the better one connects as one, yet changes with the assembling person of setting firmly, and also can.212 at second end is fixedly arranged on a wherein location division 13 respectively, make the center 12 of first end 211 around bicycle crank, make 21 one-tenth radial arrangement of connecting portion, wherein, be formed with angle 22, angle 22 ' between the per two adjacent connecting portions 21, the size of each angle 22 and its adjacent angle 22 ' big or small different, the better one, angle 22 is relative in twos, and the equal and opposite in direction of per two relative angles 22.The better one, each connecting portion 21 is not parallel to minor axis 11, can make minor axis 11 be positioned at the wherein central authorities of two relative angles 22, at this moment, if bicycle crank 1 is for ellipse or have left-right symmetric and laterally zygomorphic shape, each connecting portion 21 can have identical length, but and symmetric offset spread.Wherein, two angles 22 ' that do not wear greater than this minor axis of two angles 22 that minor axis 11 was worn.

Crank 3 one ends are fixedly arranged on this bicycle crank pawl, and the other end radially extends, wherein, in the present embodiment, crank 3 is one-body molded with this bicycle crank pawl, and in other possible embodiment of the utility model, crank 3 also may set firmly for assembling mutually with the bicycle crank pawl.Wherein, please refer to Fig. 3 and Fig. 4, can be formed with between crank 3 and the minor axis 11 one between 0 the degree to 25 the degree between deviation angle, that is, this crank can be parallel with this minor axis as shown in Figure 3, perhaps, this crank can be formed with an angle less than 25 degree with this minor axis, as shown in Figure 4; Wherein, when crank 3 set firmly for assembling with this bicycle crank pawl, this deviation angle also can be adjusted voluntarily for the user.

Utilize said apparatus, the utility model can utilize the bicycle crank pawl to be connected between crank 3 and the non-circular bicycle crank 1, please refer to Fig. 3, bicycle crank 1 can be for being assembled in the bicycle, trample and rotate with the rider, when the minor axis end points 111 of bicycle crank 1 turns to the first dead center on top, the refining bar of bicycle promptly with minor axis end points 111 engagement of bicycle crank, this bicycle crank is shorter at the diameter of minor axis end points, make the velocity of rotation of bicycle crank very fast, and it is stressed less, promptly more do not need too high structural strength to support, the angle that connecting portion 21 can be formed herein 22 improves, and connecting portion 21 is opened, in order to support bicycle crank 1 other stressed bigger position to both sides.

In sum, the utility model provides a kind of bicycle crank crank group, utilize the bicycle crank pawl to be connected between crank and the bicycle crank, this bicycle crank pawl has four connecting portions, the angle that does not have homogeneous between this connecting portion, and through adjusting, making this connecting portion is not merely to be equidistant radial arrangement, applicable to non-circular bicycle crank, and can the appropriate location be adjusted in location division or knock hole for bicycle crank.

As mentioned above; it only is preferred embodiment of the present utility model; such as change or variation that the those of ordinary skill in the affiliated technical field is done according to the utility model; all do not exceed the spirit that the utility model specification sheets and accompanying drawing are contained, all should in like manner belong to scope of patent protection of the present utility model.

Claims

1. a bicycle crank pawl is characterized in that, described bicycle crank pawl is assembled in non-circular bicycle crank, bicycle crank has a minor axis, minor axis is arranged in the center of bicycle crank, and minor axis is positioned at the weakness of diameter of bicycle crank, and bicycle crank is formed with four location divisions; Described bicycle crank pawl comprises four connecting portions, each connecting portion has first end and second end, first end interconnects and sets firmly, second end is assembled respectively and is fixedly arranged on a wherein location division, first end is around the center of bicycle crank, be formed with an angle between the per two adjacent connecting portions, described angle comprises relatively and adjacent angle, the size of each angle and its adjacent angle big or small different.

2. bicycle crank pawl as claimed in claim 1 is characterized in that, per two relative corner dimensions equate in the described angle.

3. bicycle crank pawl as claimed in claim 1 is characterized in that described connecting portion is not parallel to minor axis, and minor axis is arranged in wherein two relative angles.

4. bicycle crank pawl as claimed in claim 2 is characterized in that described connecting portion is not parallel to minor axis, and minor axis is arranged in wherein two relative angles.

5. bicycle crank pawl as claimed in claim 3 is characterized in that, the equal in length of described connecting portion.

6. bicycle crank pawl as claimed in claim 4 is characterized in that, the equal in length of described connecting portion.

7. bicycle crank pawl as claimed in claim 3 is characterized in that, two angles that two angles that described minor axis wore did not wear greater than minor axis.

8. bicycle crank pawl as claimed in claim 4 is characterized in that, two angles that two angles that described minor axis wore did not wear greater than minor axis.

9. a bicycle crank crank group comprises as each described bicycle crank pawl in the claim 1 to 8, it is characterized in that described bicycle crank crank group also comprises:

10. bicycle crank crank group as claimed in claim 9 is characterized in that, is formed with a deviation angle between described crank and the minor axis, and deviation angle is between 0 degree is spent to 25.