CN214690017U

CN214690017U - Bicycle modularization fretwork crank assembly

Info

Publication number: CN214690017U
Application number: CN202120911462.4U
Authority: CN
Inventors: 向鹏
Original assignee: Yiwu Fengdong Technology Co ltd
Current assignee: Yiwu Fengdong Technology Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-11-12
Anticipated expiration: 2031-04-29

Abstract

The utility model discloses a bicycle modularization fretwork crank assembly, it is high to have solved present crank assembly cost of manufacture on the market, and pleasing to the eye degree is not enough, and the portability is not strong, and the problem that the part can't be changed by oneself, it includes the drive side crank, non-drive side crank and axle center pole, drive side crank and non-drive side articulate both ends are equipped with pedal hole and axle center spline matching mouth respectively, are equipped with connection structure between the both ends of axle center pole and two axle center spline matching mouths respectively, are equipped with the fretwork through-hole that a plurality of runs through on at least one in drive side crank and the non-drive side crank, the utility model discloses a crank structure is stable, and is light generous, has reduced manufacturing cost, has increased the technology aesthetic feeling, and the part can freely be changed, very big reduction the cost of part replacement, and the practicality is strong.

Description

Bicycle modularization fretwork crank assembly

Technical Field

The utility model belongs to the technical field of bicycle accessory technique and specifically relates to a bicycle modularization fretwork crank assembly is related to.

Background

Bicycles are becoming an increasingly popular form of recreation as well as a means of transportation. In addition, bicycling has become a popular sport event. Whether the bicycle is used for recreation, transportation or competition, the current trend is to make bicycles stronger and lighter than existing bicycles.

Accordingly, every component of a bicycle is continually redesigned to minimize its weight and to provide sufficient strength. While the crank sprocket of a bicycle, which is an important input part of the power system of the bicycle, extends outwardly from the crank shaft in opposite directions and is connected at its free end with a pedal for supporting the rider's foot. The rotation of the pedals by the rider causes the rotation of one or more front sprockets, which in turn move the chain of the bicycle to rotate one or more rear sprockets, which in turn rotate the rear wheels of the bicycle.

At present, cranks on the market are generally solid, on one hand, the solid cranks can cause the material cost to increase, on the other hand, the cranks also do not meet the requirements of more and more lightening of bicycles, and the attractiveness is not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a bicycle modularization fretwork crank assembly under the prerequisite of guaranteeing crank intensity, has solved crank assembly cost of manufacture on the market at present high, and pleasing to the eye degree is not enough, the not strong problem of portability.

The utility model adopts the technical proposal that: the utility model provides a bicycle modularization fretwork crank assembly, includes drive side crank, non-drive side crank and axle center pole, drive side crank with non-drive side articulate both ends are equipped with respectively and pedal hole and axle center spline matching mouth, the both ends of axle center pole and two be equipped with connection structure between the axle center spline matching mouth respectively, drive side crank with be equipped with the fretwork through-hole that a plurality of runs through on at least one in the non-drive side crank.

Furthermore, a plurality of hollow through holes which are arranged at even intervals and penetrate through are respectively arranged on the driving side crank and the non-driving side crank.

Furthermore, the opening ends of the hollowed-out through holes are both side ends of the driving side crank and the non-driving side crank.

Through the design of the technical scheme, a plurality of hollow through holes are uniformly arranged in the driving side crank and the non-driving side crank at intervals, the hollow through holes are designed in the side face, and the strength between the crank hollows can be guaranteed to meet the use requirements of consumers.

Further, connection structure is the axle center spline, the axle center spline sets up respectively the both ends of axle center pole, two the axle center spline respectively with two the matching port of axle center spline matches the joint.

Furthermore, the connecting end of the axle center rod and the driving side crank is provided with a crank spline, the center of the crank spline is provided with a spline hole, the axle center spline is matched and inserted in the spline hole, and the crank spline is fixedly connected with the driving side crank.

Further, the axle center pole with the articulate link of non-drive side is equipped with the clearance adjustable ring, non-drive side crank with the link of axle center pole is equipped with the connector, the connector with non-drive side crank fixed connection is close to non-drive side crank one end the axle center spline matching is pegged graft inside the connector, clearance adjustable ring matching spiro union is in the connector is outside.

Further, be equipped with the clearance on the clearance adjustable ring, the upper and lower end of one side in clearance is equipped with chucking spare respectively, chucking spare with clearance adjustable ring integrated into one piece, two be equipped with the screw in the chucking spare respectively, be equipped with connecting screw on the clearance adjustable ring, connecting screw matches and passes clearance and two the screw.

Through the design of the technical scheme, the gap adjusting ring is in matched threaded connection outside the connector, and the axle center spline at one end of the crank at the non-driving side is in matched and inserted connection inside the connector, so that elimination of the axle center gap can be realized through threaded rotation of the gap adjusting ring, and the crank cannot move left and right. When the gap adjusting ring rotates to the position where the axial center gap is basically eliminated, the gap between the two clamping pieces can be reduced by screwing the connecting screw, and then the gap adjusting ring is tightened to prevent the gap adjusting ring from rotating randomly.

Further, the two ends of the axle center rod are respectively provided with an inner threaded hole, the inner threaded hole is formed in the axle center spline, a bolt is arranged in an axle center spline matching port, the bolt comprises an integrally formed screw head and a screw rod, the screw rod and the inner threaded hole are matched in a screwed mode, the axle center spline matching port on the driving side crank is far away from one end of the axle center rod, which is matched in a screwed mode, and is provided with an end cover, one end, close to the axle center rod, of the end cover is provided with a sleeving groove, and the screw head is matched and sleeved in the sleeving groove.

Through the design of the technical scheme, the utility model discloses a modularization fretwork crank assembly adopts the modularization equipment mode to realize the equipment replacement of crank part, is different from the fixed equipment of external compression type of traditional crank and axle center pole, the utility model discloses a crank assembly can realize the dismantlement of arbitrary part and change, and specific operating mode is: if a part on one side of the driving side crank needs to be replaced, firstly, a bolt on one side of the driving side crank needs to be unscrewed, and the axle center rod is taken out from an axle center spline matching opening in the driving side crank; the individual removal of the end cap can only be continued after the axial rod has been removed from the drive-side crank. If the part on one side of the crank on the non-driving side needs to be replaced, the connecting screw needs to be unscrewed, the gap adjusting ring needs to be loosened, the gap adjusting ring is screwed out of the connecting head, and at the moment, the bolt on one side of the crank on the non-driving side is unscrewed, so that the crank on the non-driving side and the axis rod can be detached.

Furthermore, the crank spline is externally provided with a driving device, and the driving device comprises any one or more of a chain wheel, a disc tray, a gear, a belt pulley and the like.

Through the design of the technical scheme, the size model of the crank spline is corresponding to the driving device under the general condition, the driving device can be installed outside the crank spline in a matching mode, the driving device can be replaced outside the crank spline according to requirements, the disc tray can be installed outside the crank spline, then the fluted disc is installed on the disc tray, or the gear, the belt pulley and the like are installed.

Compared with the prior art, the utility model, it has following beneficial effect: the utility model discloses a crank stable in structure, light generous has reduced manufacturing cost, has increased the technology aesthetic feeling, and the part can freely be changed, very big reduction the cost of part replacement, the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a side view of a left axle of a bicycle modular hollow crank assembly of the present invention;

FIG. 2 is a side view of the right axle of the bicycle modular hollow crank assembly of the present invention;

FIG. 3 is a schematic diagram of the overall explosion structure of the modular hollow crank assembly of the present invention;

FIG. 4 is a front view of a drive side crank of a modular hollow crank assembly for a bicycle of the present invention;

FIG. 5 is a side view of the non-driving side crank shaft of the modular hollow crank assembly of the present invention;

FIG. 6 is a side view of the space adjusting ring for the modular hollow crank assembly of the present invention;

FIG. 7 is a side view of the axle center rod of the modular hollow crank assembly of the present invention;

FIG. 8 is a side view of the bolt shaft of the modular hollow crank assembly of the present invention;

FIG. 9 is a side view of the crank shaft of the driving side of the modular hollow crank assembly of the bicycle of the present invention;

FIG. 10 is a schematic plan view of a side crank and a fluted disc directly mounted on a modular hollow crank assembly of the present invention;

figure 11 is the utility model discloses a bicycle modularization fretwork crank assembly drive side crank and dish support equipment plane sketch map.

In the drawings are labeled: 1-driving side crank, 2-non-driving side crank, 3-axle center rod, 301-axle center spline, 302-internal screw hole, 4-clearance adjusting ring, 401-clearance, 402-clamping piece, 4021-screw hole, 403-connecting screw, 5-bolt, 501-screw head, 502-screw rod, 6-external fluted disc, 7-crank spline, 701-spline hole, 8-pedal hole, 9-hollowed through hole, 10-axle center spline matching port, 11-connector, 12-toothed disc, 13-disc support, 14-end cover and 1401-socket groove.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The specific implementation scheme is as follows: referring to fig. 1-11, the utility model relates to a bicycle modularization fretwork crank assembly, including drive side crank 1, non-drive side crank 2 and axle center pole 3, drive side crank 1 and non-drive side crank 2's both ends are equipped with respectively and pedal hole 8 and axle center spline matching mouth 10, are equipped with connection structure between two axle center spline matching mouths 10 and the both ends of axle center pole 3 respectively, are equipped with the fretwork through-hole 9 that a plurality of runs through on at least one in drive side crank 1 and the non-drive side crank 2.

Specifically, a plurality of hollow through holes 9 are respectively arranged on the driving side crank 1 and the non-driving side crank 2 at uniform intervals and penetrate through the hollow through holes.

Specifically, the opening ends of the hollow-out through holes 9 are both side ends of the driving side crank 1 and the non-driving side crank 2.

In this embodiment, all be equipped with the fretwork through-hole 9 of the even interval of a plurality of in drive side crank 1 and the non-drive side crank 2, fretwork through-hole 9 designs in the side, can guarantee that the intensity between crank fretwork 9 can satisfy consumer's user demand.

As an embodiment of the present invention, the connection structure is an axis spline 301, the axis spline 301 is respectively disposed at two ends of the axis rod 3, and the two axis splines 301 are respectively matched with the two axis spline matching ports 10 to form a joint.

In this embodiment, a crank spline 7 is arranged at the connecting end of the shaft center rod 3 and the driving side crank 1, a spline hole 701 is arranged at the center of the crank spline 7, the shaft center spline 301 is inserted into the spline hole 701 in a matching manner, and the crank spline 7 is fixedly connected with the driving side crank 1.

As another preferred embodiment of the present invention, the connecting end of the shaft center rod 3 and the non-driving side crank 2 is provided with the gap adjusting ring 4, the connecting end of the non-driving side crank 2 and the shaft center rod 3 is provided with the connector 11, the connector 11 and the non-driving side crank 2 are fixedly connected, the shaft center spline 301 close to one end of the non-driving side crank 2 is matched and inserted inside the connector 11, and the gap adjusting ring 4 is matched and screwed outside the connector 11.

Specifically, a gap 401 is arranged on the gap adjusting ring 4, the upper end and the lower end of one side of the gap 401 are respectively provided with a clamping piece 402, the clamping piece 402 and the gap adjusting ring 4 are integrally formed, two clamping pieces 402 are respectively provided with a screw hole 4021, the gap adjusting ring 4 is provided with a connecting screw 403, and the connecting screw 403 penetrates through the gap 401 and the two screw holes 4021 in a matching manner.

In this embodiment, since the gap adjustment ring 4 is screwed to the outside of the connector 11 in a matching manner, and the axial spline 301 at one end of the crank 2 on the non-driving side is inserted into the connector 11 in a matching manner, the axial gap can be eliminated by rotating the thread of the gap adjustment ring 4, so that the crank does not move left and right. When the gap adjusting ring 4 rotates to the position where the axial gap is substantially eliminated, the connecting screw 403 can be tightened to reduce the gap 401 between the two clamping members 402, thereby tightening the gap adjusting ring 4 and preventing it from rotating freely.

In addition, the two ends of the axis rod 3 are respectively provided with an inner threaded hole 302, the inner threaded hole 302 is arranged inside the axis spline 301, a bolt 5 is arranged inside the axis spline matching port 10, the bolt 5 comprises a screw head 501 and a screw rod 502 which are integrally formed, the screw rod 502 and the inner threaded hole 302 are matched and screwed, one end, far away from the axis rod 3, of the axis spline matching port 10 on the driving side crank 1 is matched and screwed with an end cover 14, one end, close to the axis rod 3, of the end cover 14 is provided with a socket 1401, and the screw head 501 is matched and sleeved inside the socket 1401.

In this embodiment, the utility model discloses a modularization fretwork crank assembly adopts the modularization equipment mode to realize the equipment replacement of crank part, is different from the fixed equipment of traditional crank and the external compression type of axle center pole 3, the utility model discloses a crank assembly can realize the dismantlement of arbitrary part and change, and specific operating mode is: if a part on one side of the driving side crank 1 needs to be replaced, firstly, the bolt 5 on one side of the driving side crank 1 needs to be unscrewed, and the axle center rod 3 is taken out from the axle center spline matching opening 10 in the driving side crank 1; the individual removal of the end cap 14 can only be continued after the axial rod 3 has been removed from the drive-side crank 1. If the part on the non-driving side crank 2 side needs to be replaced, the connecting screw 403 needs to be loosened, the gap adjusting ring 4 needs to be loosened to be screwed out from the connector 11, and at this time, the bolt 5 on the non-driving side crank 2 side is unscrewed, so that the non-driving side crank 2 and the shaft center rod 3 can be detached.

The end cover 14 is provided with left-handed threads, the end cover 14 is fixedly connected with the driving side crank 1 in a threaded manner, when the bolt 5 on the driving side crank 1 is screwed out, the screw head 501 abuts against the sleeving groove 1401 on the end cover 14, and the end cover 14 drives the driving side crank 1 to be smoothly detached from the mandrel bar 3. Since the end cap 14 has a left-hand thread on the outside and is screwed and fixed to the driving side crank 1 by the left-hand thread, when the bolt 5 is unscrewed, the end cap 14 and the driving side crank 1 are screwed more tightly by the frictional force generated between the screw head 501 and the socket 1401.

In addition, the crank spline 7 is externally provided with a driving device, and the driving device comprises any one or more of a chain wheel 12, a disc tray 13, a gear, a belt pulley and the like.

In this embodiment, the size of the crank spline 7 is generally corresponding to the size of the driving device, so that the driving device can be installed outside the crank spline 7 in a matching manner, the outside of the crank spline 7 can be replaced by the driving device as required, fig. 10 is a schematic diagram of installing a toothed disc 12 directly on the outside of the crank spline 7 on the driving crank 1, fig. 11 is a schematic diagram of installing a disc tray 13 directly on the outside of the crank spline 7 on the driving crank 1, and the toothed disc and the like can be installed outside the disc tray.

The utility model discloses a bicycle modularization fretwork crank assembly is above only do the utility model discloses a preferred embodiment, not consequently the restriction the utility model discloses a patent range, all be in the utility model discloses an under the inventive concept, utilize the equivalent structure transform that the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a within range is protected to the patent.

Claims

1. The utility model provides a bicycle modularization fretwork crank assembly, its characterized in that includes drive side crank, non-drive side crank and axle center pole, drive side crank with non-drive side articulate both ends are equipped with respectively and pedal hole and axle center spline matching mouth, the both ends of axle center pole and two be equipped with connection structure between the axle center spline matching mouth respectively, be equipped with the fretwork through-hole that a plurality of runs through on drive side crank with at least one in the non-drive side crank.

2. The bicycle modular hollowed crank assembly according to claim 1, wherein the driving crank and the non-driving crank are respectively provided with a plurality of hollowed through holes which are uniformly spaced and penetrate through.

3. The bicycle modular hollow crank assembly according to claim 2, wherein the open ends of the hollow through holes are both side ends of the driving side crank and the non-driving side crank.

4. The bicycle modular hollowed crank assembly according to any one of claims 1 to 3, wherein the connecting structure is an axial spline, the axial spline is respectively disposed at two ends of the axial rod, and the two axial splines are respectively in matching clamping connection with the two axial spline matching ports.

5. The bicycle modular hollowed crank assembly according to claim 4, wherein the connecting end of the axle center rod and the driving side crank is provided with a crank spline, the center of the crank spline is provided with a spline hole, the axle center spline is inserted into the spline hole in a matching manner, and the crank spline is fixedly connected with the driving side crank.

6. The hollow crank assembly as claimed in claim 5, wherein the connecting end of the crank shaft and the crank shaft at the non-driving side is provided with a gap adjusting ring, the connecting end of the crank shaft at the non-driving side and the crank shaft is provided with a connector, the connector and the crank shaft at the non-driving side are integrally formed, the spline shaft at one end of the crank shaft at the non-driving side is matched and inserted inside the connector, and the gap adjusting ring is matched and screwed outside the connector.

7. The hollow crank assembly of claim 6, wherein the gap adjustment ring has a gap, the upper and lower ends of one side of the gap are respectively provided with a clamping member, the clamping member is fixedly connected with the gap adjustment ring, two clamping members are respectively provided with a screw hole, the gap adjustment ring is provided with a connecting screw, and the connecting screw is matched to pass through the gap and the two screw holes.

8. The hollow crank assembly as claimed in any one of claims 5 to 7, wherein the two ends of the axle center rod are respectively provided with an inner threaded hole, the inner threaded hole is disposed inside the axle center spline, a bolt is disposed inside the axle center spline matching port, the bolt comprises an integrally formed bolt head and a bolt rod, the bolt rod is in matching threaded connection with the inner threaded hole, one end of the axle center spline matching port on the driving side crank, which is far away from the axle center rod, is in matching threaded connection with an end cover, one end of the end cover, which is close to the axle center rod, is provided with a socket groove, and the bolt head is in matching socket connection with the socket groove.

9. The modular hollow crank assembly for bicycles of claim 8, wherein the crank spline is externally mounted with a driving device, the driving device comprises any one or more of a chain wheel, a disc tray, a gear, a pulley, etc.