CN201305104Y

CN201305104Y - Bicycle crank group

Info

Publication number: CN201305104Y
Application number: CNU2008201393845U
Authority: CN
Inventors: 许秀圆
Original assignee: Individual
Current assignee: BUSINESS FOULEIX BALKOS Co Ltd SPANISH; Dai Wei; Ke Sada
Priority date: 2008-10-30
Filing date: 2008-10-30
Publication date: 2009-09-09
Anticipated expiration: 2018-10-30

Abstract

The utility model provides a bicycle crank group, which comprises a mandrel, a first arrangement part, a second arrangement part, a first connection part and a second connection part, wherein, the mandrel is a quill shaft, and different positions with different length have different inner diameters; the outer diameter of the first arrangement part of the mandrel is larger than the second arrangement part; the pore diameter of the first connection part is larger than the pore diameter of the second connection part. The crank group has a specific assembly structure for special assembly sequence, and therefore the installation of the crank and the mandrel can be accomplished rapidly. The mandrel of the crank group has light weight, but still keeps the necessary mechanical strength.

Description

The bicycle crank group

Technical field

The utility model relates to a kind of bicycle assembly parts, refers to a kind of bicycle crank group especially.

Background technology

Motion general mood is in recent years day by day changeed Sheng, more and more people are by travelling frequently on and off duty by bike and classifying it outdoor activity of holiday as, for convenience of the burden that in the city, moves and reduce the driver, most bicycle is all constantly towards the progress of weight-saving direction, and general gradually design-calculated bicycle can't satisfy the light demand that ordinary consumer is wanted.

The crank group of bicycle, main being overlapped by all kinds of driver elemenies combines, and commonly use the crank assembly element that constitutes bicycle, it mainly is an axle, two cranks and a fluted disc, usually this axle is installed in the five-way pipe place of bicycle, install crank respectively at the two ends of this axle again, again by the two ends of axle this crank that locks, and wherein a crank is just supplied with this fluted disc installing, this crank is in installing a last pedal in contrast to the end in conjunction with this axle, the user is again to this pedal application of force, rotate this axle by this crank, rotate this fluted disc simultaneously, and allow this fluted disc be that rotate in the center of circle with this axle, and then the drive chain, the bicycle that turns a wheel can travel; Known mounting means must know that the junction locks it respectively with screw at this crank and this axle, or this crank system combines that by urgent mode, and the necessary cost more time is being fixed again with this axle.

Summary of the invention

The purpose of this utility model is, a kind of bicycle crank group is provided, and this crank group provides the particular group assembling structure, so that special assembling sequence can be finished the installation of this crank and this axle more quickly.

The purpose of this utility model is, a kind of bicycle crank group is provided, and the axle of this crank group has lightweight and still possesses required mechanical strength.

For the major technique means of reaching above-mentioned purpose as follows:

A kind of bicycle crank group is characterized in that, this bicycle crank group comprises:

One axle, this axle have the end of a supporting part in this axle, are provided with one first throwing part near the axle surface of this supporting part, and this axle is a logical axle, and have different inner diameters in this axle different length position;

One second throwing part, this second throwing part is positioned at this axle, and in contrast to an end of this supporting part;

One first crank, an end of this first crank has first carrier, and this first carrier is incorporated into this first throwing part, and by this supporting part location, and have a locking hole;

One second crank, an end of this second crank has second carrier, and this second carrier is incorporated into this second throwing part, also has a locking hole;

One fluted disc, this fluted disc have a perforation and a lockhole, and are arranged in this axle, and are locked in a locking hole of described crank.

Based on technique scheme, comprise that more first throwing part of this axle and second throwing part have the dentalation that is provided with along direction of principal axis, and first carrier of described crank and second carrier also have with the structure complementary mutually with this dentalation; Internal diameter is greater than the mean inside diameter of this axle between first throwing part of this axle and second throwing part.

The utility model beneficial effect: the utility model crank group provides the particular combinations order, has promoted installation rate and has simplified package program, has more the effect of expendable weight.

For ease of explanation the utility model represented central idea in above-mentioned novel content one hurdle, express with specific embodiment now.Various different objects system is described in the ratio that is suitable for illustrating, size, deflection or displacement among the embodiment, but not is drawn in the ratio of actual components, close chat earlier bright.And in the following description, similar elements is to represent with identical numbering.

Description of drawings

Fig. 1 is the utility model three-dimensional exploded view.

Fig. 2 is the utility model combination appearance figure.

Fig. 3 is the utility model first crank side view.

Fig. 4 is the utility model second crank side view.

Fig. 5 is the front elevation of the utility model axle.

Fig. 6 is the 6-6 section-drawing of the utility model Fig. 5.

The specific embodiment

With reference to the utility model Figure 1 and Figure 2, a kind of bicycle crank group, this bicycle crank group comprises: an axle 10, this axle 10 has the end of a supporting part 11 in this axle 10, axle 10 surfaces near this supporting part 11 are provided with one first throwing part 12, and along direction of principal axis one section dentalation are set in these axle 10 surfaces; One second throwing part 13 is positioned at this axle 10, and in contrast to an end of this supporting part 11, and along direction of principal axis one section dentalation also is set in these axle 10 surfaces; One first crank 20, an end of this first crank 20 has first carrier 21, and this first carrier 21 can be incorporated into this first throwing part 12, and by these supporting part 11 location, and have a locking hole 22; One second crank 30, this second carrier 31 can be incorporated into this second throwing part 13, also has a locking hole 22; One fluted disc 40, this fluted disc 40 have a perforation 41 and one lockhole 42, and can be arranged in this axle 10, and are locked in a locking hole 22 of these cranks.

With reference to the utility model Fig. 3 and shown in Figure 4, first carrier 21 of this first crank 20 and second crank 30 and second carrier, 31 aperture size differences, and these first carrier, 21 apertures are greater than second carrier, 31 apertures; Second carrier, 31 inwalls of first carrier 21 of this first crank 20 and this second crank 30 have can with the dentalation of these second throwing part, 13 complementations.

With reference to the utility model Fig. 5 and shown in Figure 6, the external diameter of first throwing part 12 of this axle 10 is greater than this second throwing part 13; Corresponding to internal diameter section 14 internal diameters on axle surface between first throwing part 12 of this axle 10 and this second throwing part 13 mean inside diameter greater than this axle 10, the axle internal diameter of this supporting part 11 and these first throwing part, 12 interludes is greater than the mean radius of this axle, and this axle 10 has a lock in the end face of this second throwing part and puts hole 15.

Design of the present utility model has fixing package program, at first first carrier 21 of this first crank 20 must be incorporated into this first throwing part 12, get final product firm combination by the engaged of both sides' dentalation, and utilize the position of these supporting part 11 these first cranks 20 of location; This fluted disc 40 then can be installed, this axle 10 is placed through the perforation 41 of this fluted disc 40, and combine with this first crank 20, and utilize a screw 43 to be locked in the lockhole 42 of this fluted disc 40 and the locking hole 22 of this first crank 40, reach at 2 and fix this fluted disc 40 on this first crank 40, and can concentric shafts rotate; Again this bicycle crank group is installed on the five-way pipe of this car body, and the other end by this axle 10, second carrier 31 of this second crank 30 is combined with second throwing part 13 of this axle 10, similarly, dentalation combination firmly between second carrier 31 and this second throwing part 13, wear the lock that locks in this second crank 30 and this axle 10 by a bolt 32 again and put hole 15, reach fixing effect, promptly finish the package program of this crank; Wherein the position of this fluted disc 40 can be changed because of user's demand and is incorporated into second crank 30, and dispersion and loaded down with trivial details assembly element have not only been simplified in this design in assembling, the time that has been spent when also having saved assembling.

Though the utility model is to do explanation with a most preferred embodiment, is skillful in this skill person and can makes various multi-form changes not breaking away under the utility model spirit and the category.Above illustrated embodiment is only in order to explanation the utility model, and is non-in order to limit scope of the present utility model.Such as do not disobey various modifications or the variation that the utility model spirit is engaged in, all belong to the utility model claim.

Claims

1. a bicycle crank group is characterized in that, this bicycle crank group comprises:

One axle (10), this axle (10) has the end of a supporting part (11) in this axle (10), be provided with one first throwing part (12) near axle (10) surface of this supporting part (11), and this axle (10) is a logical axle, and has different inner diameters in this axle (10) different length position;

One second throwing part (13), this second throwing part is positioned at this axle (10), and in contrast to the end of this supporting part (11);

One first crank (20), an end of this first crank (20) has first carrier (21), and this first carrier (21) is incorporated into this first throwing part (12), and by this supporting part (11) location, and have a locking hole (22);

One second crank (30), an end of this second crank (30) has second carrier (31), and this second carrier (31) is incorporated into this second throwing part (13), also has a locking hole (22);

One fluted disc (40), this fluted disc (40) have perforation (41) and a lockhole (42), and are arranged in this axle (10), and are locked in a locking hole (22) of described crank.

2. bicycle crank group according to claim 1 is characterized in that the external diameter of first throwing part (12) of this axle (10) is greater than this second throwing part (13).

3. as bicycle crank group as described in the claim 2, it is characterized in that first carrier (21) of this first crank (20) and second crank (30) and second carrier (31) aperture size difference.

4. as bicycle crank group as described in the claim 2, it is characterized in that, and this first carrier (21) aperture is greater than second carrier (31) aperture.

5. bicycle crank group according to claim 1 is characterized in that, this first throwing part (12) is provided with one section dentalation in this axle (10) surface along direction of principal axis.

6. bicycle crank group according to claim 1 is characterized in that, this second throwing part (13) is provided with one section dentalation in this axle (10) surface along direction of principal axis.

7. as bicycle crank group as described in the claim 5, it is characterized in that first carrier (21) inwall of this first crank (20) has the dentalation complementary with this first throwing part (12).

8. as bicycle crank group as described in the claim 6, it is characterized in that second carrier (31) inwall of this second crank (30) has the dentalation complementary with this second throwing part (13).

9. bicycle crank group according to claim 1 is characterized in that, corresponding to internal diameter section (14) internal diameter on axle surface between first throwing part (12) of this axle (10) and this second throwing part (13) mean inside diameter greater than this axle (10).

10. bicycle crank group according to claim 1 is characterized in that, the axle internal diameter of this supporting part (11) and this first throwing part (12) interlude is greater than the mean radius of this axle.

11. the bicycle crank group is characterized in that according to claim 1, this axle (10) has a lock in the end face of this second throwing part and puts hole (15).