JP3628287B2 - Bicycle transmission mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a kind of bicycle transmission mechanism.
[0002]
[Prior art]
Bicycles are the best fit and best exercise and health tool to enjoy outdoor leisure and experience nature, and it's quite comfortable to run in the forest on a bicycle, enjoy leisure and exercise at the same time Can be perfect for modern people. Traders in the bicycle manufacturing industry place great emphasis on material weight and structural strength for every parb in the entire bicycle. However, it is very difficult to find an equilibrium point between the weight of the material and the strength of the structure. Because structural strength of the metallic material is high but weight is too heavy, plastic lightweight insufficient structural strength must sift through one therebetween. For this reason, it is impossible to manufacture each part of the bicycle unless research and development of a lightweight and high-strength structure is carried out. That is, this is a requirement that the modern bicycle industry is very much looking forward to breaking through.
[0003]
Among them, the known transmission mechanism has an enormous volume that increases material consumption and relatively increases production and manufacturing costs, and the enormous volume relatively increases the weight of the bicycle and increases the amount of bicycle operation. affect the sensitivity of the excessive volume also gives strict influence on aesthetics of the whole molding, it is the small car and inapplicable, freewheel which is then attached to the wheel is received protection chain cover not, rain water to easily fat is passed, abrasive wear of the free wheel is accelerating, and shorten the service life, and removed at the time of repair or replacement of the free wheel is considerably inconvenient, to remove the many relationship parts cumbersome and time, also, the main drive disk is integrated are fixed to the crank, the influence of a relatively large number of factors perpendicularity of the disk operation, the perpendicularity of the driving accuracy Guaranteed difficult to easily and very generate relatively large swing width to the disc generates a small error, a number of drawbacks that occur in the known transmission mechanism, it is necessary to study improvements.
[0004]
From the above, in order to have competitive ability in the bicycle parts market, it is necessary that the parts are lightweight and have high structural strength.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a transmission mechanism of a kind of bicycle, it is mounted on the forward freewheel from the bicycle of the shaft to improve the shortcomings volume is enormous known transmission mechanism, a second position The volume of the transmission mechanism is greatly reduced by minimizing the ring-tooth structure of the limiting means, and the relatively small ring-tooth relatively reduces the weight of the bicycle and makes the features of the lightness of the bicycle stand out. In accordance with the development trend of weight reduction of bicycles, it is assumed that the manufacturing cost is greatly reduced by the material to be saved, and it has an economic effect.
[0006]
[Means for Solving the Problems]
The invention of claim 1
Both ends each coupling portion is provided, transversely to the appropriate part of the inner edge, the housing space is provided et the penetrating the middle tube, and the middle tube,
Fitted to the coupling portion of the upper above, a plurality of the appropriate portion of the peripheral edge, perforations through the spokes are provided, and two hub even without low,
A position restricting groove is recessed on one side, and a screw hole communicating with the position restricting groove is provided laterally on the other side. It is screwed into a joint at one end of the middle pipe and one of the hubs is joined to the middle pipe. located limited to portion, a first position restriction means,
A position limiting groove is recessed on one side, ring teeth are formed in a ring shape on the peripheral edge of the other side, a screw hole that communicates laterally with the position limiting groove is provided in the center , and the other end of the middle tube is joined Situated limit another hub coupling portion of Chukan screwed into the section, and the second position restriction means,
Fitting portion provided on one end, the positioning portion is provided in another end via the stopper portion, the bearing is inserted into the fitting portion is inserted into the receiving space of the middle fitting part tube, and bearing is position limits the position limiting groove receiving restraining the locking edge of the stopper portion is further secured behind the fork of the bicycle, it is capable of generating a position limiting means and the medium pipe and the relative rotational relationship, even without least two Two locking means;
Waha annularly is protrusively provided on the peripheral edge, is secured to the crank, to rotate convey power to a second position restriction means and the medium pipe by a chain during crankshaft rotation, and freewheel,
It is a bicycle transmission mechanism characterized by having.
The invention according to claim 2 is the bicycle transmission mechanism according to claim 1, wherein a staircase engaging edge is provided between the coupling portion and the middle tube body.
The invention according to claim 3 is characterized in that one locking portion is extended and projected at one outer edge of the hub, and the locking portion is locked to the stair locking edge of the coupling portion. The transmission mechanism of the bicycle according to 1.
The invention according to claim 4 is the bicycle transmission mechanism according to claim 1, characterized in that an arcuate locking edge is provided on one side corresponding to the fitting portion of the stopper portion .
The invention according to claim 5 is the bicycle transmission mechanism according to claim 1, wherein the number of teeth of the ring teeth of the second position limiting means is eight.
In the invention of claim 6, a washer is screwed into the positioning portion of the locking means, and it is further fitted into the rear fork of the bicycle and the nut is screwed into the positioning portion, so that it is tightly attached to the rear of the bicycle. The bicycle transmission mechanism according to claim 1, wherein the bicycle transmission mechanism is coupled to a fork.
The invention according to claim 7 is the bicycle transmission mechanism according to claim 1, wherein the number of teeth of the free wheel is 14 teeth.
The invention of claim 8 is characterized in that the crank is provided with a rectangular perforation corresponding to the middle shaft of the bicycle and is installed on the middle shaft of the bicycle, and the crank is restricted and fixed within the middle shaft by one nut. The bicycle transmission mechanism according to claim 1.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Shown in FIGS. 1-4 is the structure of a selected embodiment of the present invention, which is presented for purposes of illustration and is not limited by this structure in the claims.
[0008]
As shown in FIGS. 2 and 3, the bicycle transmission mechanism of the present invention comprises the following. That is, the intermediate tube 10 is provided, and coupling portions 11 are provided at both end portions of the intermediate tube 10, and a stair locking edge 12 is formed between the coupling portion 11 and the tube body of the intermediate tube 10. A thread 13 provided at a suitable portion of the outer edge, and a housing space 14 penetrating the middle tube 10 laterally at a suitable portion of the inner edge of the middle tube 10;
The hub 20 is provided with a joint hole 21 extending laterally in the center of the peripheral edge of the hub 20, and an engaging portion 22 extending outwardly at one outer edge of the joint hole 21. A plurality of perforations 23 through which spokes are passed are provided in the main part, the hub 20 drives the rim by restricting the position where the spokes are locked, and the hub 20 is mounted on the coupling portion 11 of the intermediate tube 10. The hub 20, wherein the stop 22 can be locked to the staircase locking edge 12 of the coupling portion 11;
Is the first position restriction means 30, the position limiting grooves 31 on one side of the first position restriction means 30 is recessed, communicates with the position limit grooves 31 transversely another side of the first position restriction means 30 screw holes 32 are provided, is screwed into the coupling portion 11 of one end of the middle tube 10 first position restriction means 30 is located limit the hub 20 in the coupling portion 11 of Chukan 10, the first position limitations Means 30;
Is a second position limiting means 40, the position limiting grooves 41 on one side of the second position restriction means 40 is recessed, lateral protrusions 42 are provided on another side of the second position restriction means 40, A ring tooth 43 is annularly formed on the periphery of the convex portion 42, the number of teeth of the ring tooth 43 is 8 to 9, and a screw that communicates laterally with the position limiting groove 41 in the center of the convex portion 42. holes 44 are provided to position limits another hub 20 in the coupling portion 11 of Chukan 10 is screwed into the other end of the coupling portion 11 of the middle tube 10 is the second position restriction means 40, the second Position limiting means 40;
The engagement means 50 is provided with a fitting portion 51 at one end of the engagement means 50, and a positioning portion 52 having a thread is provided at the other end of the engagement means 50. A stopper portion 53 is provided between the portions 52, an arcuate locking edge 54 is provided on one side corresponding to the fitting portion 51 of the stopper portion 53, and the bearing 61 is inserted into the fitting portion 51, Furthermore the fitting portion 51 of the locking means 50 is inserted into the middle tube 10 housing space 14 of, and bearing 61 is positioned limited to position limits the groove receives a stop of locking edge 54 of the stopper portion 53, which As a result, the locking means 50 generates a rotational relationship corresponding to the position limiting means and the middle tube 10, and one washer 62 is first screwed into the positioning portion 52 of the locking means 50, which is further inserted into the rear fork of the bicycle. The nut 63 is inserted into the positioning portion 52. Screwed into, it is tightly coupled to it back fork of the bicycle, and the locking means 50,
The free wheel 70 is annularly provided with ring teeth 71 around the periphery of the free wheel 70, the number of teeth of the ring teeth 71 is approximately 14, and a screw hole 72 is provided in the center of the free wheel 70. The free wheel 70 is screwed into the threaded portion 81 of the crank 80, and the crank 80 is provided with a rectangular perforation 82 corresponding to the middle shaft 90 of the bicycle. There are limited fixed within the center shaft 90, and when the crank 80 is rotated, the free wheel 70 and the inner shaft 90 rotates in synchronization with the freewheel 70,
It has.
[0009]
As shown in FIGS. 1 and 3, when the user operates the transmission mechanism of the present invention, rotated in synchronization by interlocking freewheel 70 and the center pole 90 by rotating the crank 80 stepping on the pedal 84 of the crank 80 is allowed, the chain 91 which is hung on the free wheel 70 is rotated by the driving of Waha 71, thereby rotating the second position restriction means 40 drives the Waha 43 of second position restriction means 40, the Since the two- position restricting means 40 is screwed to the middle tube 10, the middle tube 10, the hub 20 and the first position restricting means 30 are synchronized with each other, and the rear wheel of the bicycle is rotated to move forward. housing spaces locking means 50 inserted into the 14 is unable to rotate is Nishise' behind the bicycle fork, the action of the bearing 61 in position limits the groove position limiting means and locking edge 54 of the stopper portion 53 By the locking hand 50 and the position limiting means and Chukan 10 generates a rotational relationship corresponding. The free wheel 70 according to the present invention is installed on the middle shaft 90 of the bicycle and has not only a basic transmission system, but also the size and number of teeth of the ring teeth 43 are reduced to the minimum, and the volume of the transmission mechanism can be greatly reduced. The design is extremely inventive.
[0010]
【The invention's effect】
As can be seen from the above description, the bicycle transmission mechanism of the present invention has an enhanced function, and the present invention is designed to have considerable industrial applicability, and the advantages thereof are as follows.
1. The bicycle transmission mechanism of the present invention improves the disadvantage that the volume of the known transmission mechanism is enormous due to the design in which the free wheel is provided on the center shaft, and the ring tooth structure of the second position limiting means is minimized (about 8). Teeth), thereby greatly reducing the volume of the transmission mechanism.
2. In the bicycle transmission mechanism of the present invention, the relatively small wheel teeth relatively reduce the weight of the bicycle, make the bicycle lighter and more convenient, and keep up with the current development trend of weight reduction of the bicycle. The material can greatly reduce the manufacturing cost and has considerable economic advantages.
3. Bicycle transmission mechanism of the present invention has a freewheel is provided on the center shaft of the bicycle, the diameter compared with that of known is reduced by half, and the structure of the attachment is reasonably simple, its freewheeling operation In terms of verticality and technology, accurate control can be performed, the stability during chain operation is relatively increased, and there is no occurrence of chain catching or chain dropping.
4). In the bicycle transmission mechanism of the present invention, the free wheel is provided on the center shaft, and related parts related to the removal of the free wheel can be greatly reduced, which is convenient and quick at the time of repair or replacement.
5. In the bicycle transmission mechanism of the present invention, since the free wheel is provided on the center shaft, it is not necessary to install a full chain cover, it is only necessary to install a general half chain cover, and the free wheel protects the chain cover for a long time. is under, because not subjected to rain for a long time can maintain good lubricating condition, it can be greatly improved lifetime freewheel.
[0011]
The foregoing is a preferred embodiment of the present invention, and does not limit the scope of the present invention. Any modification or alteration in detail that can be made based on the present invention shall fall within the scope of the claims of the present invention.
[Brief description of the drawings]
FIG. 1 is a perspective view of the present invention.
FIG. 2 is an exploded perspective view of the present invention.
3 is a cross-sectional view taken along the line AA in FIG.
FIG. 4 is a side view of the actual use state of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Middle pipe 11 Coupling part 12 Locking edge 13 Screw thread 14 Accommodating space 20 Hub 21 Joint hole 22 Locking part 23 Perforation 30 First position restriction means 31 Position restriction groove 32 Screw hole 40 Second position restriction means 41 Position restriction groove 42 Convex part 43 Ring tooth 44 Screw hole 50 Locking means 51 Fitting part 52 Positioning part 53 Stopper part 54 Locking edge 61 Bearing 62 Washer 63 Nut 70 Free wheel 71 Ring tooth 72 Screw hole 80 Crank 81 Screw part 82 Drilling 83 Nut 84 Pedal 90 Center shaft 91 Chain

Claims (8)

Both ends each coupling portion is provided, transversely to the appropriate part of the inner edge, the housing space is provided et the penetrating the middle tube, and the middle tube,
Fitted to the coupling portion of the upper above, a plurality of the appropriate portion of the peripheral edge, perforations through the spokes are provided, and two hub even without low,
A position restricting groove is recessed on one side, and a screw hole communicating with the position restricting groove is provided laterally on the other side. It is screwed into a joint at one end of the middle pipe and one of the hubs is joined to the middle pipe. located limited to portion, a first position restriction means,
A position limiting groove is recessed on one side, ring teeth are formed in a ring shape on the peripheral edge of the other side, a screw hole that communicates laterally with the position limiting groove is provided in the center , and the other end of the middle tube is joined Situated limit another hub coupling portion of Chukan screwed into the section, and the second position restriction means,
Fitting portion provided on one end, the positioning portion is provided in another end via the stopper portion, the bearing is inserted into the fitting portion is inserted into the receiving space of the middle fitting part tube, and bearing is position limits the position limiting groove receiving restraining the locking edge of the stopper portion is further secured behind the fork of the bicycle, it is capable of generating a position limiting means and the medium pipe and the relative rotational relationship, even without least two Two locking means;
Waha annularly is protrusively provided on the peripheral edge, is secured to the crank, to rotate convey power to a second position restriction means and the medium pipe by a chain during crankshaft rotation, and freewheel,
Bicycle transmission mechanism, characterized by comprising The bicycle transmission mechanism according to claim 1, wherein a staircase engaging edge is provided between the coupling portion and the middle tube body. The bicycle transmission according to claim 1, wherein one locking portion is extended and protruded on one outer edge of the hub, and the locking portion is locked to the staircase locking edge of the coupling portion. mechanism. The bicycle transmission mechanism according to claim 1, wherein an arcuate locking edge is provided on one side corresponding to the fitting portion of the stopper portion . The bicycle transmission mechanism according to claim 1, wherein the number of teeth of the ring teeth of the second position limiting means is eight. The washer is screwed into the positioning part of the locking means, and it is further fitted into the rear fork of the bicycle and the nut is screwed into the positioning part so that it is tightly coupled to the rear fork of the bike. The bicycle transmission mechanism according to claim 1, wherein The bicycle transmission mechanism according to claim 1, wherein the number of teeth of the free wheel is 14 teeth. 2. The bicycle according to claim 1, wherein the crank is provided with a rectangular perforation corresponding to the middle shaft of the bicycle and is installed on the middle shaft of the bicycle, and the crank is restricted and fixed in the middle shaft by one nut. Power transmission mechanism.

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