TW201335021A - Structure of fast variable-speed chain and the outer chain piece of the chain - Google Patents

Abstract

The present invention is about structure of fast variable-speed chain and the outer chain piece of the chain. The fast variable-speed chain includes multiple pair of outer chain pieces and multiple pair of inner chain pieces which are hinge jointed by pins. The outer chain piece includes an inner face and an outer face. The inner face of the pair of outer chain pieces opposite to each other, and the middle part of the outer chain piece has a waist. The outer chain piece has two slots near the two sides of the waist which are concaved from inner surface to outer surface, and the faces of the slots each has a curve notch uplifted to the outer surface. The two curve notches at the two sides of the waist are arranged diagonal. Thus, it can be changed speed rapidly and quietly, and would not be interference with a flywheel.

Description

Construction of fast shifting chain and its outer chain

The invention relates to a structure of a quick-change chain and an outer chain piece thereof, in particular to a recessed groove on the two sides of the waist of the outer chain piece, and an arc-shaped groove which is outwardly raised in the notch, This configuration allows the chain to reach a fast shifter.

In general, the chain for bicycles can be precisely matched with the flywheel, so that each chain tooth of the flywheel can be surely cut between the two links, and the chain teeth are not cut in time due to the shaking of the chain or the vibration of the bicycle. Probability, so the industry is not going to delve into how to make the chain teeth cut into the parts between the two links to increase the spacing.

One type, as shown in the first figure, is a chain structure, the chain includes two sets of oppositely disposed outer links (A) and two sets of oppositely disposed inner links (B) arranged at intervals and mutually Pivot, the middle part of the outer chain piece (A) has a waist portion (A1), and the waist portions (A1) of the two outer chain pieces (A) of the group have a concave side opposite to the outside, and gradually toward the circumference of the waist (A1). The missing slot (A2). As shown in the second and third figures, we define the spacing between the bottom faces of the notches (A2) at the periphery of the waist (A1) of the two outer links (A) as the lead-in spacing (d1), which is sufficient when the chain is shifting. The width of the introduction pitch (d1) makes it easier for the sprocket (C1) on the flywheel (C) to enter between the two outer links (A); the distance between the two outer links (A) and the inner surface is defined by us. For the guiding distance (d2), when the sprocket (C1) on the flywheel (C) enters between the two outer links (A), the chain needs to be quickly guided to avoid chain sway, and the proper guiding distance (d2) The chain can be positioned to be quickly guided, and the chain is less likely to sway when it is rotated on the flywheel (C).

The above-mentioned conventional technique makes it possible to introduce the sprocket (C1) of the flywheel (C) into the two when the chain shifts, by providing the vacant groove (A2) in the outer chain piece (A) so as to increase the introduction pitch (d1). Between the outer chain pieces (A); however, when the bicycle speed is relatively fast, the above-mentioned type of chain still has a lead-in spacing (d1) which is not wide enough, so that there is still a disadvantage that the cutting speed is slow, the noise is easy to be generated, or the chain is easily broken.

Therefore, there is an improved chain structure for further increasing the lead-in spacing between the two outer links to accommodate the shifting of the bicycle at higher driving speeds. As shown in the fourth figure, the chain includes two sets of relative sets. The outer chain piece (D) and the two oppositely disposed inner chain pieces (E) are spaced and pivotally connected to each other, and the middle part of the outer chain piece (D) has a waist portion (D1), and two outer chain pieces in the group ( D) The waist (D1) has a bridge-shaped notch (D2) which is pressed toward the opposite outer side by pressing against the inner surface, and the bridge-shaped notch (D2) gradually becomes deeper toward the circumference of the waist (D1). As shown in the fifth and sixth figures, the introduction width (d1) of the outer chain pieces (D) of the chain will have a larger width, so that the chain can be smoothly shifted at a higher driving speed.

However, in actual use, it has been found that the above-described improved chain structure has a wider introduction pitch (d1) to accommodate shifting at higher driving speeds, but still has the following drawbacks:

1. The bridge-shaped sag (D2) formed by the stamping makes it easy to cause stress concentration at the bend of the outer link (D) bulge, thus causing the outer link (D) to break from the bend of the ridge. Risk.

2. As shown in Fig. 13, since the two outer chain pieces (D) are stamped from the inner side toward the outer side with respect to each other, the positive spacing between the two outer chain pieces (D) relative to the inner surface is set. (d2) widens, so that the chain (C1) of the flywheel (C) is not easily guided after entering the two outer links (D), and when the chain is rotated on the flywheel (C), It is possible to cause sway due to an excessively wide guiding distance (d2).

3. As shown in Figure 13, the distance between the adjacent flywheels (C) of the flywheel group is narrower due to the need for more variable speed shifts, and the overhanging bridge type missing slots (D2) make the two outer links of the group ( D) The distance is too wide, so it is easy to interfere with the flywheel (C) and collide with each other.

Therefore, the present invention proposes a construction of a fast shifting chain and an outer chain thereof, thereby providing a feeding space having a sufficient width for a high bicycle speed, achieving a need for rapid shifting; and having a proper guiding pitch when the flywheel After the sprocket enters between the two outer links, the chain can be quickly guided and positioned; for a flywheel set with multiple stages of shifting, the width of the two outer links of the group does not interfere with the flywheel.

The fast change chain referred to therein includes:

a plurality of two sets of oppositely disposed outer link pieces and a plurality of two sets of oppositely disposed inner link pieces, wherein the plurality of sets of outer and outer link pieces are arranged at intervals, and the outer links and the inner groups are arranged in groups Each of the links is pivotally connected to each other by a chain pin assembly; the outer chain piece includes opposite inner faces and an outer face, and the two pieces are disposed opposite each other in groups, and the inner faces correspond to each other, and the outer faces The middle section of the chain comprises a waist portion, and each of the two sides of the waist has a notch recessed by the inner surface toward the outer surface and gradually deepening toward the circumference of the waist portion, and each of the two sides of the waist portion is provided with a bulge toward the outer surface And an arcuate groove which gradually becomes deeper toward the circumference of the waist, and the arcuate groove is diagonally arranged on both sides of the waist.

Further, another diagonal line on the two sides of the waist of the outer chain piece is further provided with an arcuate groove which is raised toward the outer surface.

The invention has the following effects:

1. In the two outer chain pieces of the group, the introduction pitch has a sufficient width, and the gear teeth of the flywheel can quickly enter between the two outer chain pieces when shifting, and the proper guiding distance is provided, and the chain can be quickly guided. Positioning, to achieve the purpose of fast shifting of the bicycle and silent positioning.

2. The ridge of the curved groove is less likely to cause stress concentration, which can avoid the risk of breakage of the outer link.

3. The outer chain piece of the invention only bulges outwardly of the outer chain piece at the arcuate groove, and does not interfere with the flywheel during shifting.

In summary of the above technical features, the main effects of the construction of the quick-change chain and its outer chain of the present invention can be clearly demonstrated in the following embodiments.

Referring to the seventh embodiment to the ninth embodiment of the present invention, the fast change chain of the embodiment includes:

a plurality of two sets of oppositely disposed outer link pieces (1) and a plurality of two sets of oppositely disposed inner link pieces (2), the plurality of sets of outer link pieces (1) and inner link pieces (2) Between the groups of outer links (1) and the inner chain pieces (2), each of which is pivotally connected to each other by a chain pin assembly (3); the outer chain piece (1) comprises an opposite inner surface ( 11) and an outer surface (12), the two pieces are arranged opposite each other, the outer chain pieces (1) correspond to each other by the inner surface (11), and the middle part of the outer chain piece (1) comprises a waist portion (13). The two sides of the waist (13) each have a notch (14) recessed toward the outer surface (12) by the inner surface (11) and gradually deeper toward the circumference of the waist (13), and on both sides of the waist (13) Each of the notches (14) is provided with an arcuate groove (15) which is raised toward the outer surface (12) and gradually becomes deeper toward the circumference of the waist portion (13), and the arcuate groove (15) is at the waist portion (13) The two sides are arranged diagonally.

Among the two outer chain sheets (1) of the foregoing group, one of the inner surfaces of the outer chain piece (1) has a curved groove (15) at the periphery of the waist (13) and an inner surface opposite to the other outer chain piece (1). The spacing between (12) is the lead-in spacing (d1) of the chain of the embodiment, and the arcuate groove (15) is provided on the diagonal of the waist (13) of the outer chain piece (1) so that the chain is on the left and right sides of the flywheel assembly. When the flywheel (C) is shifting, the introduction pitch (d1) of sufficient width can be made to quickly enter the two outer chain pieces of the flywheel (C) of the flywheel (C) on the left and right sides of the chain (1) In the middle, the purpose of fast shifting is achieved.

Referring to the tenth to twelfth embodiments of the present invention, the difference from the first embodiment described above is that there are notches on both sides of the waist portion (13) of the outer chain piece (1). The other diagonal line is further provided with an arcuate groove (15) which is raised toward the outer surface (12). Therefore, in this embodiment, the arcs of the circumference of the two outer chain pieces (1) of the waist (13) The pitch between the bottom faces of the shaped grooves (15) is the introduction pitch (d1) of the chain of the present embodiment.

Referring to the thirteenth figure, the two types of the prior art chain are compared with the chain of the first and second embodiments of the present invention:

In the chain of the first and second embodiments of the present invention, the group of the two outer chain pieces (1) has a larger introduction between the two outer chain pieces (A) than the group of the first type of the prior art chain. Pitch (d1); and in the chain of the first and second embodiments of the present invention, the two outer chain sheets (1) have two outer chain pieces (D) between the two outer chain pieces (1) of the prior art. A narrower guiding distance (d2) between them.

Therefore, the introduction belt (d1) of the chain of the present invention having a sufficient width enables the sprocket (C1) of the flywheel (C) to quickly enter between the two outer chain sheets (1), and has appropriate guiding The spacing (d2), that is, the narrower guiding distance (d2) between the two outer chain pieces (D) of the second type chain of the prior art, enables the chain to be quickly guided and positioned, and less The phenomenon of chain swaying achieves the purpose of fast shifting of the bicycle and silent positioning.

Further, the outer chain piece (1) of the present invention is raised only toward the outer surface (12) of the outer chain piece (1) at the curved groove (15), and does not interfere with the flywheel (C) on the left and right sides during shifting. Moreover, the ridge of the curved groove (15) is less likely to cause stress concentration, and the risk of breakage of the outer link piece (1) can be avoided.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

(1). . . Outer link

(11). . . inside

(12). . . outside

(13). . . waist

(14). . . Missing slot

(15). . . Curved groove

(2). . . Inner link

(3). . . Chain pin assembly

(A). . . Outer link

(A1). . . waist

(A2). . . Missing slot

(B). . . Inner link

(C). . . flywheel

(C1). . . Chain teeth

(D). . . Outer link

(D1). . . waist

(D2). . . Bridge type slot

(E). . . Inner link

(d1). . . Import spacing

(d2). . . Positive spacing

The first figure is a three-dimensional appearance of the first type of the conventional chain.

The second figure is a top view of the first figure.

The third drawing is a cross-sectional view taken along line A-A of the first figure and a schematic diagram of the shifting state thereof.

The fourth figure is a three-dimensional appearance of the second type of the conventional chain.

The fifth figure is the top view of the fourth figure.

The sixth drawing is a B-B cross-sectional view of the fourth figure and a schematic diagram of the shifting state thereof.

The seventh drawing is a perspective view of the first embodiment of the present invention.

The eighth figure is a top view of the seventh figure.

The ninth drawing is a cross-sectional view taken along line C-C of the seventh drawing and a schematic diagram of the shifting state thereof.

The tenth drawing is a perspective view of the second embodiment of the present invention.

The eleventh figure is a top view of the tenth figure.

The twelfth figure is a cross-sectional view taken along line D-D of the tenth figure and a schematic diagram of the shifting state thereof.

Figure 13 is a schematic view of the comparison of the chain of the present invention with a conventional chain.

(1). . . Outer link

(11). . . inside

(12). . . outside

(13). . . waist

(14). . . Missing slot

(15). . . Curved groove

(2). . . Inner link

(3). . . Chain pin assembly

Claims (4)

The outer chain piece structure comprises an outer chain piece, wherein the outer chain piece comprises an inner surface of the opposite inner side and an outer surface, and the middle part of the outer chain piece comprises a waist portion, and the two sides of the waist part have a concave surface from the inner side The outer surface of the waist portion is gradually deepened toward the circumference of the waist portion, and each of the two sides of the waist portion is provided with an arcuate groove which is convex toward the outer surface and gradually becomes deeper toward the circumference of the waist portion. The two sides of the waist are arranged diagonally. The structure of the outer chain as described in claim 1, wherein the other diagonal line on the two sides of the waist is further provided with an arcuate groove that is convex toward the outer surface. A fast shifting chain includes a plurality of two sets of oppositely disposed outer link pieces and a plurality of two sets of oppositely disposed inner link pieces, wherein the plurality of sets of outer and inner link pieces are arranged at intervals The outer chain piece and the inner chain piece are respectively pivotally connected to each other by a chain pin assembly;
It is characterized by:
The outer chain piece comprises an inner surface of the opposite inner side and an outer surface, wherein the two pieces are oppositely arranged, and the outer side pieces correspond to each other, and the middle part of the outer chain piece comprises a waist portion, and each of the two sides of the waist part has a side The inner surface is concave toward the outer surface and is gradually deepened toward the circumference of the waist portion, and each of the two sides of the waist portion is provided with an arcuate groove which is convex toward the outer surface and gradually becomes deeper toward the circumference of the waist portion. The aforementioned arcuate grooves are diagonally arranged on both sides of the waist. The fast-speed shifting chain according to claim 3, wherein the outer diagonal piece has a curved groove facing the outer ridge on the other diagonal line on the two sides of the waist.