TW202016447A - Chain having the performance of easy speed change for gear shifting when the chain wheels are in transmission and position change - Google Patents

Abstract

The invention provides a chain, which is formed by cascading a plurality of three-component chain link units. Each of the three-component chain link units includes two inner chain sheets disposed in parallel to each other, two outer chain sheets oppositely arranged at the outer sides of one end of the two inner chain sheets, and chain pins pivoted between the inner chain sheets and the outer chain sheets. Each of inner chain sheets is formed with a substantially multilateral chain roller convex body at the inner side of an inner chain sheet arc section thereof. The chain roller convex bodies of the two inner chain sheets disposed in parallel to each other are combined into a substantially polygonal chain roller. Therefore, the chain is applied between chain wheels of a variable speed transmission mechanism, and the chain has the performance of easy speed change for gear shifting when the chain wheels are in transmission and position change by using the structure of the substantially polygonal chain roller of each of the three-component chain link units.

Description

Chain

The invention relates to a chain which is suitable for a variable-speed transmission mechanism and is used for connecting a plurality of sprockets to transmit power.

At present, the creation of chains connected between multiple sprockets will be improved in structure due to the performance requirements of the chain in terms of use, manufacturing or power transmission. The existing chain is mainly composed of a plurality of chain link units connected in series to form an annular body, so that the chain can be wound around and connected to a plurality of sprockets to transmit power. At present, the known link units have various combinations of five-element, four-element, and three-element types. Among them, the three-element link unit is compared with the five-element link unit and the four-element link unit. With simplified components.

The generally known three-element chain link unit mainly includes two inner links, two outer links, and a chain pin. The two inner links form round chain roller protrusions on the inner sides of the two ends. , The two inner chain pieces are arranged side by side and are in contact with the circular chain roller protrusions of each other, one end of the two outer chain pieces is respectively arranged outside one end of the two inner chain pieces which are opposite to each other, and the chain pin passes through the two The outer chain links and the two inner chain link round link roller protrusions are pivotally connected, and the two inner link link circular link roller protrusions are combined to provide sprocket contact transmission. Location.

When the aforementioned chain with a three-element link unit is applied to a variable-speed transmission mechanism, it is driven by the contact between the circular chain roller and the sprocket between two opposing inner chain links of each three-element link unit Therefore, when the chain is in the transmission and shifting position of the sprocket, the chain link unit between the two inner chains easily interferes with the sprocket of the sprocket during the shifting of the link unit between the sprockets. , Causing the sprocket teeth to cut into the chain at a position behind the chain unit, such as the fourth chain unit or the fifth chain unit, etc., so that the chain has a variable speed upshift performance in the transmission mechanism The problem of bad.

The purpose of the present invention is to provide a chain to solve the problem that the existing chain has poor performance in shifting upshifts of the shifting transmission mechanism.

In order to achieve the foregoing objective, the chain proposed by the present invention includes multiple arrays of three-element link units, the multiple arrays of the three-element link units are connected in series, and each of the three-element link units includes: Chains, each of the inner chains includes an inner chain body and two chain roller protrusions, each of the inner chains includes two inner chain circular arc segments, and two inner chain circular arc segments In the middle section of the inner link, two chain roller protrusions are formed on the inner side of the inner link body, and the two chain roller protrusions are respectively located in the arc segments of the two inner links. The chain roller convex body is a substantially polygonal convex body, and the chain roller convex body has a center, and the inner side of the convex body is provided with an inner chain pin hole at the center, and the two inner chain pieces are relatively juxtaposed. The link roller protrusions of the two inner link plates are relatively combined to form a substantially polygonal link roller; two outer link plates, each of the inner link plates includes two outer link plate arc segments and two outer link plate circle segments A middle section of the outer chain piece between the arc sections, two outer chain piece circular arc sections are each provided with an outer chain pin hole, and the two outer chain pieces are respectively arranged on the two of the outer chain section arc sections The outer side of the inner segment arc segment of the inner link; and a chain pin, which passes through the outer link pin hole of the outer segment arc segment of the two outer links and the chain roller of the inner link The convex body is pivotally connected in the inner chain pin hole.

Through the creation of the aforementioned chain structure, it is applied to a variable speed transmission mechanism and has at least the following advantages: 1. Improve the efficiency of the chain when shifting gears: the chain of the present invention is formed by two parallel side chains The structure of the substantially polygonal chain roller, on the basis of maintaining the necessary contact transmission between the chain roller and the sprocket, through the reduction of some entities of the substantially polygonal chain roller, when the chain is driven and the position of the sprocket is changed, the substantially polygonal chain roller It can reduce the interference of the three-element chain link unit in the gear shifting process, which is conducive to the sprocket teeth cutting into the closest first three-element chain unit or the second three-element chain unit , Improve the efficiency of the chain when shifting gears. 2. Strengthen the strength of the chain roller: The chain of the present invention has the effect of increasing the strength of the chain roller compared to the circular chain roller structure of the existing chain, thanks to the substantially polygonal chain roller structure between the two parallel inner chain pieces. 3. Reducing the friction between the chain roller and the sprocket: The chain of the present invention uses a substantially polygonal chain roller structure between the two parallel inner chain pieces to reduce the contact area between the sprocket teeth and the sprocket , To reduce the friction between the chain roller and the sprocket.

The chain of the present invention can further utilize the opposite sides of the inner side of the inner section of the inner link to form a guide slope, and the opposite sides of the inner side of the outer section of the outer link form a guide respectively The inclined surface and other structures, through the guide inclined surface and the inclined surface in the process of shifting the gear between the chain and the sprocket, the sprocket teeth of the sprocket are guided to help improve the chain in the shifting gear Increase in efficiency.

The chain of the present invention can further utilize the structure that the diameter of the arc segment of the inner chain is slightly smaller than the diameter of the arc segment of the outer chain, so that the chain can make the chain and chain The interference between the sprockets of the wheels is reduced to achieve the function of upshifting gears at a fast speed.

The chain of the present invention can further utilize the end edge of the guide bevel of the inner chain to approach the chain roller curved surface of the chain roller convex body, so that the sprocket teeth of the sprocket can be more easily guided to the guide bevel through the chain roller curved surface of the inner chain and then enter the two In the space between the inner chain plates, the interference between the inner chain plates and the sprocket teeth is effectively reduced, and the performance of rapid shifting upshift is improved.

The chain of the present invention can further use the chain roller protrusion of the inner chain to form a ring flange that protrudes into the accommodating groove at the hole edge of the inner chain pin hole, and the chain pin is pivotally provided by the ring flange The connected parts provide good mechanical strength, ensure that the inner chain plate is not deformed by force, and the chain maintains good transmission stability during the transmission process.

The chain of the present invention can further use the inner chain plate to form an accommodating groove with an opening facing outward in the convex body of the chain roller to provide grease injection therein, so that the grease provides lubrication between the inner chain plate and the chain pin, which is smoother during the transmission process .

The chain of the present invention includes multiple arrays of three-element chain link units 1, and the multiple arrays of the three-element chain link units 1 are connected in series. As shown in FIGS. 1 to 3, a preferred embodiment of the three-element link unit 1 is disclosed. As can be seen from the drawings, the three-element link unit 1 includes two inner links 10, Two outer chains 20 and one chain pin 30.

As shown in FIGS. 1 to 3, the two inner links 10 are relatively juxtaposed, and each of the inner links 10 includes an inner link body 11 and two link roller protrusions 12, and each of the inner links The two ends of 10 are respectively an inner chain segment arc segment 111, and between the two inner chain segment arc segments 111 is an inner link segment 112, and the two sides of the inner link body 11 are respectively an inner side With one outer side, two chain roller protrusions 12 are formed on the inner side of the inner chain body 11, the two chain roller protrusions 12 are located in the two inner chain segment arc segments 111, respectively, and the chain roller The width of the convex body 12 relative to the inner side surface of the inner link body 11 is determined according to actual product requirements. The chain roller convex body 12 is a hollow substantially polygonal convex body. When the two inner link plates 10 are arranged side by side, The shapes of the chain roller protrusions 12 of the two inner chain plates 10 are relatively combined to form a substantially polygonal chain roller 100.

As shown in FIGS. 1 to 3, the chain roller convex body 12 has a convex body side portion 121 and a convex body peripheral wall 122. The convex body side portion 121 is located opposite to the inner side of the chain roller convex body 12 On the other side of the chain arc segment 111, the convex body peripheral wall 122 is connected between the convex body side 121 and the inner chain segment arc segment 111, and the chain roller convex body 12 is formed with an opening facing outward的一容容槽14. In the preferred embodiment, the chain roller convex body 12 may be a substantially triangular convex body, a substantially quadrilateral convex body, a substantially pentagonal convex body or a substantially hexagonal convex body, etc., but not limited thereto. As shown in FIGS. 4 to 7, the chain roller convex body 12 has a center C1, the convex body side portion 121 is provided with an inner chain pin hole 13 relative to the center C1, and the convexity of the chain roller convex body 12 The body peripheral wall 122 has a plurality of chain roller planes 123 distributed at an equal angle to the center C1, and an arc-shaped chain roller curved surface 124 is formed between every two adjacent chain roller planes 123, and each chain roller plane 123 is opposite to each other. The vertical distance L1 of the center C1 of the chain roll convex body 12 is equal in length, and the maximum distance L2 of each chain roll curved surface 124 with respect to the center C1 of the chain roll convex body 12 is also equal in length. The chain roll flat surface 123 is relative to the chain roll The vertical distance L1 of the center C1 of the convex body 12 is smaller than the maximum distance L2 of the chain roller curved surface 124 relative to the center C1 of the chain roller convex body 12.

As shown in another embodiment shown in FIG. 8, the inner chain 10 is formed at the edge of the inner chain pin hole 13 of the chain roller convex body 12 to further form a ring flange 15, the ring flange 15 is formed from a convex body The side surface of the side portion 121 facing the accommodating groove 14 protrudes toward the accommodating groove 14. The inner chain 10 forms an accommodating groove 15 in the chain roller convex body 12 with the opening facing outward, so that grease can be injected, and the grease is used for lubrication.

As shown in FIGS. 1 to 3, one end of the two outer links 20 is respectively disposed outside one end of the two inner links 10, and the two ends of each inner link 10 are respectively an outer link circle. The arc segment 21, between the two outer chain segment arc segments 21 is an outer link segment 22, the two outer link segment arc segments 21 are each provided with an outer link pin hole 23, and the two outer link segments 20 are respectively disposed on the outer side surface of the inner link arc segment 111 of the inner link 10 with the outer link arc segment 21, and the outer link pin hole 23 of the outer link arc segment 21 corresponds to the The inner chain pin hole 13 of the chain roller protrusion 12 of the inner chain 10, the diameter of the outer chain segment 21 is greater than or equal to the diameter of the inner chain segment 111, in this preferred embodiment In this case, the diameter of the outer chain segment 21 is slightly larger than the diameter of the inner chain segment 111.

As shown in FIGS. 1 to 3, the chain pin 30 passes through the outer chain pin hole 23 of the outer chain segment 21 of the outer chain 20 and the chain roller protrusions of the inner chain 10 The inner chain pin holes 13 of 12 are pivotally connected so that the chain roller protrusions 12 of the two inner chain pieces 10 are relatively merged to form a substantially polygonal chain roller 100. As shown in another embodiment shown in FIG. 9, the chain pin 30A can also form a concave portion at each of its axial ends.

As shown in another embodiment shown in FIGS. 10 and 11, the inner link 10 forms a guiding slope 16 on opposite sides of the inner side of the inner section 112 of the inner link 112, and the outer link 20 is on the outside The two opposite sides of the inner side surface of the chain link middle section 22 respectively form a slope 24. Among them, it is preferable that both end edges of the guiding inclined surface 16 of the inner chain 10 are close to the chain roller curved surfaces 124 of the two chain roller protrusions 12 respectively.

Regarding the use situation of the chain of the present invention, when the chain of the present invention is applied to a bicycle transmission mechanism, the chain can be wound around and connected to a plurality of sprockets to transmit power. Among them, the chain of the present invention is constructed by a substantially polygonal chain roller 100 between two parallel inner chain pieces, and on the basis of maintaining the necessary contact transmission between the chain roller and the sprocket, the chain of the substantially polygonal chain roller 100 The roller curved surface 124 serves as a part where the sprocket contacts the transmission, and the structure of the plurality of chain roller planes 123 is used to reduce part of the entity of the substantially polygonal chain roller 100, thereby allowing the chain to transmit and change position between the sprockets. The polygonal chain roller can sufficiently reduce the interference of the three-element link unit 1 during the shifting upshift process, which is conducive to the sprocket teeth cutting into the closest first three-element link unit or second A three-element chain link unit improves the efficiency of the chain when shifting gears. At the same time, the chain can also be constructed by a substantially polygonal chain roller 100 between the two inner chain pieces 10 that are relatively juxtaposed. The substantially polygonal chain roller 100 can be used to reduce the contact area between the sprocket teeth and reduce the reduction of chain rollers and chains. Friction between wheels.

In addition, the chain of the present invention can also use the guiding slopes 16 on the opposite sides of the inner side of the inner link 10 on the inner side of the inner link 112, and the outer link 20 on the inner side of the inner link 22 The guide slopes 24 on the opposite sides, through the guide slopes 16 and the guide slopes 24, during the shifting of the chain between the sprockets, the chain teeth of the sprocket are guided, which helps to lift the chain Increased efficiency in shifting gears. In particular, the two sides of the guide inclined surface 16 of the inner chain 10 are close to the chain roller curved surfaces 124 of the two chain roller protrusions 12, which helps the sprocket teeth pass through The chain roller curved surface 124 of the chain 10 guides the inclined surface 16 and then enters the space between the two inner chains 10, which effectively reduces the interference between the inner chains 10 and the teeth and improves the performance of rapid shifting upshift.

1: Three-element chain link unit 10: Inner chain 11: Inner chain body 111: arc segment of inner chain 112: Middle section of inner chain 12: Chain roller convex body 121: convex side 122: Convex wall 123: chain roller plane 124: Chain roller curved surface 13: inner chain pin hole 14: accommodating slot 15: Ring flange 16: Guide bevel 100: substantial polygonal chain roller C1: Center L1: The vertical distance of the chain roller plane relative to the center of the chain roller convex body L2: The maximum distance of the surface of the chain roller relative to the center of the convex body of the chain roller 20: Outer link 21: arc segment of outer chain 22: Middle section of outer chain 23: outer chain pin hole 24: guide slope 30, 30A: Chain pin

FIG. 1 is an exploded perspective view of a preferred embodiment of the three-element link unit of the chain of the present invention. FIG. 2 is a three-dimensional schematic diagram of the preferred embodiment of the three-element link unit shown in FIG. 1 after being combined. FIG. 3 is a schematic cross-sectional view of the preferred embodiment of the three-element link unit shown in FIG. 1 after combination. 4 is a schematic perspective view of the inner link in the preferred embodiment of the three-element link unit shown in FIG. 1. FIG. 5 is a schematic perspective view of the inner link in another preferred embodiment of the three-element link unit shown in FIG. 1. 6 is a schematic plan view of the inner link in the preferred embodiment of the three-element link unit shown in FIG. 1. 7 is a schematic cross-sectional view of the inner link in the preferred embodiment of the three-element link unit shown in FIG. 1. 8 is a schematic cross-sectional view of another preferred embodiment of the inner link. 9 is a schematic cross-sectional view of a preferred embodiment of a three-element link unit using another type of chain pin. 10 is a schematic plan view of another preferred embodiment of the inner link in the three-element link unit of the present invention. 11 is a schematic cross-sectional view of another preferred embodiment of the three-element link unit of the present invention.

1: Three-element chain link unit

10: Inner chain

11: Inner chain body

111: arc segment of inner chain

112: Middle section of inner chain

12: Chain roller convex body

13: inner chain pin hole

20: Outer link

21: arc segment of outer chain

22: Middle section of outer chain

23: outer chain pin hole

30: Chain pin

Claims (10)

A chain comprising a plurality of arrays of three-element chain link units, the plurality of arrays of the three-element chain link units are connected in series, and each of the three-element chain link units includes: two inner links, each of the inner The chain piece includes an inner chain piece body and two chain roller protrusions, each of the inner chain pieces includes two inner chain piece circular arc segments, and an inner chain piece middle segment located between the two inner chain disc circular segments , The two chain roller protrusions are formed on the inner side of the inner chain plate body, and the two chain roller protrusions are respectively located in the arc segments of the two inner chain plates, and the chain roller protrusions are substantially polygonal A convex body, and the chain roller convex body has a center, the inner side of the convex body is provided with an inner chain pin hole at the center, two inner chain pieces are relatively juxtaposed, and two chains of the inner chain pieces The roller convex bodies are relatively merged to form a substantially polygonal chain roller; two outer chain plates, each of the inner chain plates includes two outer chain plate arc segments and an outer chain between the two outer chain plate arc segments In the middle section of the plate, two outer chain link arc sections are each provided with an outer link pin hole, and the two outer link plates are respectively disposed on the inner link plate circles of the two inner link plates with the outer link plate arc sections The outer side of the arc segment; and a chain pin which passes through the outer chain pin hole of the outer arc segment of the two outer chain segments and the inner chain pin hole of the chain roller protrusion of the two inner chain segments To be pivotally connected. The chain according to claim 1, wherein the chain roller convex body of the inner link has a convex body side and a convex body peripheral wall, and the convex body side is located on the chain roller convex body with respect to the On the other side of the arc segment of the inner chain, an accommodating groove with an opening facing outward is formed in the convex body of the chain roller of the inner chain, and the peripheral wall of the convex body is connected to the side of the convex body and the inner chain Between the arc segments, the convex body peripheral wall of the chain roller convex body has a plurality of chain roller planes distributed at an equal angle with respect to the center, and an arc-shaped chain is formed between every two adjacent chain roller planes Roller surface. The chain according to claim 2, wherein the vertical distance of each chain roller plane relative to the center of the chain roller convex body is equal, and the maximum distance of each chain roller curved surface relative to the center of the chain roller convex body is equal length The vertical distance of the chain roller plane relative to the center of the chain roller convex body is less than the maximum distance of the chain roller curved surface relative to the center of the chain roller convex body. The chain according to claim 3, wherein the chain roller convex body is a substantially triangular convex body, a substantially quadrilateral convex body, a substantially pentagonal convex body or a substantially hexagonal convex body. The chain according to claim 1, wherein the inner chain piece forms a guiding slope on opposite sides of the inner side surface of the inner section of the inner chain section, and the outer chain section is formed on the inner side of the inner section of the outer chain section A guide slope is formed on opposite sides. The chain according to any one of claims 2 to 5, wherein the chain roller convex body of the inner chain piece forms a ring flange protruding into the accommodating groove at the edge of the inner chain pin hole. The chain according to any one of claims 2 to 4, wherein the inner link forms a guiding slope on opposite sides of the inner side surface of the middle section of the inner link, and both ends of the guiding slope The edges are respectively close to the curved surface of the chain roller convex body of the two chain rollers, and the outer chain plates respectively form a guide slope on opposite sides of the inner side surface of the middle section of the outer chain plates. The chain according to any one of claims 1 to 5, wherein the diameter of the arc segment of the inner link is smaller than the diameter of the arc segment of the outer link. The chain according to claim 7, wherein the diameter of the arc segment of the inner link is smaller than the diameter of the arc segment of the outer link. The chain according to any one of claims 1 to 5, wherein the chain pin forms a concave portion at both axial ends.

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