CN107434005B

CN107434005B - Bicycle fluted disc connecting device

Info

Publication number: CN107434005B
Application number: CN201610357741.4A
Authority: CN
Inventors: 陈忠诚; 陈忠义; 李盛骞; 陈郁雄; 江元正
Original assignee: Glory Precision Industry Co ltd
Current assignee: Glory Precision Industry Co ltd
Priority date: 2016-05-26
Filing date: 2016-05-26
Publication date: 2020-06-12
Anticipated expiration: 2036-05-26
Also published as: CN107434005A

Abstract

The invention provides a bicycle fluted disc connecting device. The bicycle fluted disc connecting device is used for being arranged on a bicycle and comprises a joint disc, a shaft rod and a crank. The joint disc is provided with a fluted disc combination and is provided with a shaft hole, a bulge part and a ring part, wherein the bulge part bulges from the central part of the joint disc, and the ring part is flat and is wound on the outer periphery of the bulge part; the shaft lever passes through the shaft hole and is fixedly connected with the joint disc, and the shaft lever is provided with a joint end; the crank has a joint end and a stress end, wherein the joint end is fixedly connected with the joint end of the shaft rod, and the stress end is used for bearing the action of external force so as to enable the crank to rotate around the shaft rod. The structural design can reduce the material consumption of the whole bicycle fluted disc connecting device, and further achieve the aims of saving the manufacturing cost, reducing the volume and lightening the weight.

Description

Bicycle fluted disc connecting device

Technical Field

The present invention relates to bicycles; in particular to a fluted disc connecting device of a bicycle.

Background

FIG. 1 is an exploded view of a conventional bicycle chainring attachment. The fluted disc connecting device 1 comprises a crank member 2, a fluted disc 3 and a shaft 5. The crank 2 includes a shaft 2a and a claw head 2b, one end of the shaft 2a is pivotally connected to a pedal (not shown), and the other end is connected to the claw head 2 b; the claw-shaped head 2b has a plurality of extension claws 2c, and the extension claws 2c each have a through hole 2 d; the chain plate 3 is used for providing a chain (not shown) for winding, and has a plurality of connecting portions 3a extending toward the axis of the chain plate 3, each of the connecting portions 3a has a through hole 3b, and the crank member 2 and the chain plate 3 are respectively connected with a nut 4b after passing through a through hole 2d and a through hole 3b by a plurality of bolts 4a, so that the crank member 2 and the chain plate 3 are fixed. The shaft 5 is coupled at one end to the center of the claw-shaped head 2b so as not to rotate relative to the crank 2.

Through the structural design of the fluted disc connecting device 1, a rider can drive the crank piece 2 and the fluted disc 3 to rotate around the shaft rod 5 simultaneously in the process of pedaling, and indirectly drive the wheels of the bicycle to rotate through the chain, so as to drive the bicycle to move.

However, the conventional crank member 2 includes the shaft 2a and the claw head 2b which are integrally connected and have a solid structure, which is not only bulky and disadvantageous to packaging and transportation, but also increases the overall weight of the bicycle after being assembled to the bicycle, thereby increasing the burden on the rider. Moreover, the crank piece 2 is difficult to process and manufacture, and a lot of waste materials are generated after the crank piece is finished to cause high production cost.

Therefore, how to achieve the objectives of volume reduction and light weight of the conventional chainring connecting device while reducing the production cost thereof is the design focus of the conventional chainring connecting device for bicycles.

Disclosure of Invention

Accordingly, the present invention is directed to a bicycle chainring connecting device, which has the features of reduced volume and light weight while reducing the manufacturing cost.

To achieve the above objects, the present invention provides a bicycle chainring connecting device comprising: a joint disc having a shaft hole; and a shaft rod which passes through the shaft hole and is fixedly connected with the joint disc, and the shaft rod is provided with a joint end.

Further, to achieve the above objects, the present invention provides a bicycle chainring connecting device including an engaging plate, a shaft and a crank. The joint disk has a shaft hole; the shaft lever passes through the shaft hole and is fixedly connected with the joint disc.

The invention has the advantages that the production cost is reduced, the volume is reduced and the light weight is achieved by the structure that the jointing disc is fixedly connected to the shaft lever.

Drawings

FIG. 1 is a schematic view of a conventional bicycle chainring attachment.

FIG. 2 is a schematic view of a bicycle chainring attachment apparatus in accordance with a first preferred embodiment of the present invention.

FIG. 3 is an exploded view of the bicycle chainring attachment apparatus of FIG. 2.

Fig. 4 is a perspective view showing structural features of the splice tray and the shaft.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4, showing the groove wall of the first ring groove of the splice disk engaging the groove wall of the second ring groove of the shank.

FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 4, showing the toothed plate secured by a bolt and nut combination after the engagement of the coupling plate with the toothed plate.

FIG. 7 is an enlarged fragmentary view of FIG. 5, showing the collar of the splice tray extending axially and forming a shaft bore therearound.

FIG. 8 is a schematic view of a bicycle chainring attachment apparatus in accordance with a second preferred embodiment of the present invention.

FIG. 9 is a schematic view of a bicycle chainring attachment apparatus in accordance with a third preferred embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 9, showing the splice tray and shaft secured by bolts.

FIG. 11 is a schematic view of a bicycle chainring attachment apparatus in accordance with a fourth preferred embodiment of the present invention.

[ description of the invention ]

100 bicycle fluted disc connecting device

10 shaft lever

101 first ring groove 102 joint end

20 splice tray

Shaft hole of collar 221a of 22 bulge 221

221b end 221c second groove 222 wall

24 ring part 241 top surface 242 positioning column

242a hole

26 ribs 28 hollowed out portion

30 fluted disc

32 positioning hole

40 crank

401 engaging end 402 force bearing end 42 anchor

51-bolt 52-nut W solder

5 five-way pipe 5a containing hole

6 pedal 7 bearing

200 bicycle fluted disc connecting device

54 limiting piece

62 shaft 64 blocking wall 641 through hole

66 joint disk 68 wall 681 screw hole

300 bicycle fluted disc connecting device

56 limiter 72 axle 74 engagement disc

721 screw hole 722 external tooth section

741 through hole 742 internal tooth segment

400 bicycle fluted disc connecting device

80 engaging disk 82 external ratchet

90 shaft lever

Detailed Description

In order that the invention may be more clearly described, several preferred embodiments will now be described in detail with reference to the accompanying drawings. Referring to FIGS. 2 and 3, a partial view of a bicycle using a bicycle chainring attachment apparatus 100 in accordance with a first preferred embodiment of the present invention is illustrated. The bicycle comprises a five-way tube 5, two pedals 6, two bearings 7, a fluted disc 30 and a crank 40, wherein the two bearings 7 are positioned in a containing hole 5a of the five-way tube 5.

The bicycle chainring connecting device 100 is coupled to the bottom bracket 5 and includes a shaft 10 and a coupling plate 20. The shaft 10 is located in the containing hole 5a of the five-way pipe 5, and has a first annular groove 101 recessed from the outer circumferential surface of the shaft 10, a connecting end 102, and a screw hole 103 recessed from the end surface of the shaft 10. The coupling end 102 is formed at an external tooth section of an outer circumferential surface of the shaft 10; the two ends of the shaft rod 10 are respectively sleeved with the bearings 7, so that the shaft rod 10 can smoothly rotate in the accommodating hole 5 a.

As shown in fig. 4 to 5, the joint plate 20 is a thin plate body formed by press forming, which is small and light, and the joint plate 20 has a bulge portion 22 and a ring portion 24 surrounding the outer periphery of the bulge portion 22. The bulge portion 22 bulges from the central portion of the bonding pad 20 to make the opening of the bonding pad 20 face the crank 40, the bulge portion 22 has a collar 221 and a wall 222, the collar 221 is located at the center of the bulge portion 22 and extends toward the crank 40 along the axial direction and is formed with a shaft hole 221a in a surrounding manner, so that the shaft rod 10 can be disposed in the shaft hole 221 a. It is mentioned here that the end surface 221b of the collar 221 near the end of the crank 40 does not extend beyond the top surface 241 of the ring 24. In addition, the collar 221 has a second groove 221c, the second groove 221c is recessed from the wall of the shaft hole 221a and located at the end of the collar 221 away from the crank 40 to connect with the groove wall of the first groove 101 of the shaft 10. The wall 222 is formed to protrude radially outward from the outer circumferential surface of the collar 221, and the wall 222 is located at an end of the collar 221 away from the crank 40.

In the embodiment shown in fig. 7, the shaft 10 and the bonding pad 20 are fixed by brazing without brazing, and the first annular groove 101 and the second annular groove 221c are used for filling the solder W, so as to increase the contact area between the shaft 10 and the bonding pad 20 and enhance the bonding strength therebetween. In addition, the above-mentioned structure relationship makes the shaft 10 pass through the shaft hole 221a and fixedly connect with the bonding pad 20, and then the shaft 10 is clamped by the hole wall of the shaft hole 221a of the collar 221 and firmly connects with the bonding pad 20, so as to form a good configuration relationship.

The ring portion 24 of the bonding pad 20 is flat and is used for providing the engagement of the fluted disc 30, the ring portion 24 has a plurality of positioning posts 242 formed by protrusion, and each positioning post 242 has a hole 242 a. The gear plate 30 has a plurality of positioning holes 32 corresponding to the positioning posts 242, and the above design aims to achieve the effect of convenient alignment in the process of combining the gear plate 30 with the bonding plate 20, and the gear plate 30 is fixed on the bonding plate 20 by a plurality of bolts 51 and a plurality of nuts 52. For convenience of illustration, referring to fig. 6, when the positioning posts 242 of the bonding plate 20 are respectively engaged with the positioning holes 32 of the fluted disc 30, the bolt 51 is inserted through a hole 242a of the positioning post 242 and locked with the nut 52, so as to fix the fluted disc 30 on the bonding plate 20. In addition, the aforementioned structure design that the end surface 221b of the collar 221 near the end of the crank 40 does not exceed the top surface 241 of the ring portion 24 can prevent the interference between the gear plate 30 and the collar 221 during the assembling process.

In addition, the bonding pad 20 further has a plurality of ribs 26 and a plurality of hollow portions 28 (referring to fig. 4), and the ribs 26 are respectively disposed on the swelling portion 22 and the ring portion 24 to enhance the strength of the bonding pad 20. The hollowed-out portions 28 are located on the raised portion 22, so as to reduce the amount of material used for the bonding pad 20 and achieve the effect of light weight.

The crank 40 has an engaging end 401, a force bearing end 402, and an internally toothed bore 403 at the engaging end 401. The crank 40 is engaged with the coupling end 102 of the shaft 10 through the internal tooth holes 403, and then, a fixing member 42 (bolt) is inserted into the internal tooth holes 403 and locked into the internal tooth holes 403 of the crank 40, so as to fix the crank 40 to the shaft 10 to prevent the fall-off.

By the above-mentioned structure of the bicycle chainring connecting device 100, the rider can drive the crank 40 to rotate about the shaft 10 and simultaneously drive the chainring 30, the shaft 10 and the connecting plate 20 to rotate when pedaling the pedals 6.

The bicycle chainring connecting device 100 of this embodiment does not have a structural design that requires the engagement plate 20 and the crank 40 to be coupled to each other, so that they can be manufactured separately in a single process to avoid the high cost and generation of a lot of waste material due to the integral formation. In addition, the coupling plate 20 is small and light, and can be stably fixed to the shaft 10 and coupled to the toothed plate 30, so that the bicycle chainring connecting apparatus 100 can achieve light weight while reducing the manufacturing cost thereof.

It should be noted that the fastening manner between the coupling plate 20 and the axle rod 10 is not limited to the above, and the bicycle chainring connecting apparatus 200 of the second preferred embodiment shown in fig. 8 has the same composition and structure as the bicycle chainring connecting apparatus 100 of the first preferred embodiment, except that the bicycle chainring connecting apparatus 200 of the second preferred embodiment further includes at least one limiting member 54, the at least one limiting member 54 is two bolts, the axle rod 62 of the present embodiment has a blocking wall 64 formed by protruding from the outer wall of the axle rod 62, and the blocking wall 64 is formed with a through hole 641; the wall 68 on the bonding pad 66 has two screw holes 681 corresponding to the through holes 641; when the bolts 54 are inserted into the corresponding through holes 641 and locked on the screw holes 681, the shaft 62 can be fixed on the joint disk 66, and the effects of volume reduction, light weight and cost reduction of the foregoing embodiment can be achieved.

Referring to fig. 9 and 10, a third preferred embodiment of a bicycle chainring connecting device 300 is shown, which is identical in structure to the first preferred embodiment of the bicycle chainring connecting device 100, except that the third preferred embodiment of the bicycle chainring connecting device 300 further comprises at least one limiting member 56, wherein the at least one limiting member 56 is a bolt, the axle rod 72 in this embodiment has a threaded hole 721, an outer toothed section 722 is wound around an outer circumferential surface of the axle rod 72, the engaging plate 74 has a through hole 741 communicating with the threaded hole 721, an inner toothed section 742 is disposed on a wall of the axial hole of the engaging plate 74, and the inner toothed section 742 is used for engaging with the outer toothed section 722; when the external tooth section 722 of the shaft 72 is engaged with the internal tooth section 742 of the joint disk 74, the shaft 72 is prevented from rotating relative to the joint disk 74, and then the bolt is locked on the screw hole 721 through the through hole 741, so as to fix the shaft 72 to the joint disk 74, and the same effect as the two embodiments is achieved.

In addition, the function of the bonding discs in the above three embodiments is to provide toothed disc coupling, and in other embodiments, the bonding discs may also be directly used as discs for providing chain arrangement. Referring to fig. 11, a bicycle chainring connecting device 400 of a fourth preferred embodiment has a structure similar to that of the bicycle chainring connecting device 100 of the first preferred embodiment, which includes a coupling plate 80 and a shaft rod 90 fixed to the coupling plate 80. in this embodiment, an outer circumferential surface of the coupling plate 80 is provided with an outer ratchet 82 in a protruding manner, and a chain (not shown) can be wound around the outer ratchet 82 to indirectly drive a bicycle wheel to rotate, in other words, the coupling plate 80 of this embodiment can replace a conventional chainring to achieve the same transmission function. In addition, the rider can also evaluate the usage requirement, and according to the combination of the fluted disc and the engaging disc of the first preferred embodiment, the fluted disc (not shown) is installed on the engaging disc 80 of this embodiment, so as to increase the number of the fluted disc sets, and the rider can select more steps.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the present invention as described in the specification and claims should be understood as included in the protection scope of the present invention.

Claims

1. A bicycle chainring attachment apparatus, comprising:

a joint disc having a shaft hole;

a shaft rod, which passes through the shaft hole and is directly and fixedly connected with the joint disc, and the shaft rod is provided with a joint end; and

a crank directly fixed to the connecting end of the shaft lever, wherein the crank is not in contact with the connecting disc and has no direct connection relation;

the joint disc is provided with a bulge part and a ring part, the bulge part bulges from the central part of the joint disc, the bulge part is provided with a lantern ring, and the lantern ring extends along the axial direction and is formed with the shaft hole in a surrounding way; the ring part is flat and is wound on the outer periphery of the bulge part; and

the limiting piece penetrates through the joint disc and the shaft rod so that the joint disc is fixedly combined with the shaft rod;

wherein the at least one limiting piece comprises at least one bolt, the bulge part is close to the lantern ring and is provided with at least one screw hole; the shaft lever is provided with a blocking wall which is formed by protruding from the outer wall of the shaft lever, the blocking wall is provided with at least one through hole, and the bolt passes through the through hole and is locked on the screw hole.

2. A bicycle chainring attachment apparatus, comprising:

a joint disc having a shaft hole;

wherein the at least one limiting piece comprises at least one bolt, the shaft lever is provided with a screw hole, the outer ring surface is provided with an outer tooth section, the joint disc is provided with a through hole communicated with the screw hole of the shaft lever, and the hole wall of the shaft hole of the joint disc is provided with an inner tooth section for being combined with the outer tooth section; the bolt is locked on the screw hole through the through hole.

3. The apparatus according to claim 1 or 2, wherein the ring portion has a plurality of positioning posts formed thereon, the chainring abuts against the ring portion, and the chainring has a plurality of positioning holes respectively engaging with one of the positioning posts.

4. The bicycle chainring attachment apparatus according to claim 3, further comprising a plurality of bolts and a plurality of nuts; wherein each positioning column is also provided with a hole; the bolt penetrates through the hole and is locked with the nut.

5. The bicycle chainring attachment apparatus as set forth in claim 3, wherein said engagement plate has an outer ratchet projecting circumferentially from said outer annular surface, said outer ratchet being adapted to provide a chain wrap.

6. The bicycle chainring connecting device according to claim 1 or 2, wherein the engagement plate further includes a plurality of ribs respectively disposed on the raised portion and the ring portion.

7. The bicycle chainring connecting device according to claim 1 or 2, wherein the axle has a first annular groove formed along an outer circumferential surface of the axle in a recessed manner; the joint disc is provided with a second annular groove which is formed on the periphery of the collar and forms a recess together with the first annular groove; the shaft lever is fixedly connected with the joint disc in a welding mode, and solder is filled into the first annular groove and the second annular groove.