TWI675157B - Chain - Google Patents

Abstract

A chain is made up of a plurality of three-element chain link units. The three-element chain link unit includes two inner chain pieces that are arranged side by side, and two outer chain pieces that are arranged on the outer side of one end of the two inner chain pieces. And a chain pin which is pivoted between the inner link piece and the outer link piece, the inner link piece forms a substantially polygonal chain roller convex body on the inner side surface of the inner segment of the inner link piece, and the two inner link pieces are opposite to each other. The chain rollers are convex and combined into a substantially polygonal chain roller, so that the chain is applied between the sprocket of the variable speed transmission mechanism. The structure of the substantially polygonal chain roller of each three-element chain link unit is used to drive and change the chain on the sprocket In the position, it has the performance of easy shifting and upshifting.

Description

Chain

The invention relates to a chain which is suitable for transmission power transmission by connecting a plurality of sprocket wheels in a variable speed transmission mechanism.

At present, the creation of a chain connected between a plurality of sprocket wheels will be improved in structure due to the performance requirements of the use of the chain, manufacturing or providing power transmission. The existing chain is mainly an annular body composed of a plurality of chain link units connected in series, so that the chain can be connected around a plurality of sprocket wheels to transmit power. Currently known link units have five-element, four-element, and three-element combination structures. Among them, the three-element chain unit is compared to the five-element chain unit and the four-element chain unit. Streamlined components.

The composition of a conventional three-element chain link unit mainly includes two inner link pieces, two outer link pieces, and a chain pin, and the two inner link pieces form circular chain roller protrusions on the inner side surfaces of the two ends thereof. The two inner chain pieces are arranged side by side and contact with each other's circular chain roller convex bodies. One end of the two outer chain pieces is respectively disposed outside one end of the two inner chain pieces which are opposite to each other in parallel. The chain pin passes through the two places. The outer chain pieces and the two inner chain pieces of the circular chain roller convex body are pivotally connected, and the sprocket contact transmission is provided by the chain rollers formed by opposing and merging the circular chain roller convex bodies of the two inner chain plate. Parts.

When the aforementioned three-element chain link unit is applied to a variable-speed transmission mechanism, it is driven by the contact between the circular sprocket and the sprocket between the two parallel inner chain pieces of each three-element chain link unit. Therefore, when the chain is driven and shifted by the sprocket, during the process of shifting the gear unit between the sprocket and upshifting, the round sprocket between the two inner links is likely to interfere with the sprocket teeth. , Causing the position where the sprocket teeth cut into the chain is biased to the link unit at a later position, such as the fourth link unit or the fifth link unit, etc., so that the chain has a speed-shifting performance in the transmission mechanism Poor problems.

The object of the present invention is to provide a chain that solves the problem of poor performance of the existing chain on the speed-shifting and up-shifting performance of the transmission mechanism.

In order to achieve the foregoing object, the chain provided by the present invention includes a multi-element three-element chain link unit, and the multi-element three-element chain link unit is connected in series. Each of the three-element chain unit includes: Chain pieces, each of the inner link pieces includes an inner link body and two chain roller protrusions, each of the inner link pieces includes two inner link piece arc segments, and two inner link piece arc segments In the middle section of an inner link, the 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 two arc segments of the inner chain. The chain roller convex body is a substantially polygonal convex body, and the chain roller convex body has a center, and the side of the convex body is provided with an inner chain pin hole at the center position. The chain roller convex bodies of the two inner link pieces are oppositely merged to form a substantially polygonal chain roller; two outer link pieces, each of the inner link pieces includes two outer link piece arc segments and two outer link piece circles An outer chain middle section between the arc sections, and two outer chain pin circular arc sections are each provided with an outer chain pin hole. The outer link pieces are respectively arranged outside the inner link piece arc portions of the inner link pieces with the outer link piece arc segments; and a chain pin is passed through the outer link pieces of the two outer link pieces. The outer chain pin hole of the arc segment and the inner chain pin hole of the chain roller convex body of the two inner chain pieces are pivotally connected.

Based on the construction of the aforementioned chain, it is applied to the 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 arranged between two parallel inner chain plates. The substantially polygonal chain roller structure, on the basis of maintaining the necessary contact transmission between the chain roller and the sprocket, reduces the substantial entity of the substantially polygonal chain roller to allow the chain to be driven and changed position by the sprocket. Can reduce the interference of the three-element chain link unit in the process of shifting gears, which is beneficial to the sprocket teeth quickly cut into the chain's first three-element chain unit or the second three-element chain unit , To improve the efficiency of the chain when changing gears. 2. Enhance the strength of the chain roller: The chain of the present invention has a substantially polygonal chain roller structure between two adjacent inner chain pieces, which has the effect of increasing the strength of the chain roller compared to the existing circular chain roller structure of the chain. 3. Reduce friction between sprocket and sprocket: The chain of the present invention has a substantially polygonal sprocket structure between two side-by-side inner chain pieces. The substantially polygonal sprocket is used to reduce the contact area with the sprocket teeth. 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 middle section of the inner link to form a guide slope, and the opposite sides of the inner side of the middle section of the outer link of the outer link to form a guide respectively. Structures such as bevels, which guide the sprocket's sprocket during the process of shifting gears between the chain and the sprocket through the guide ramp and the guide ramp, help to increase the chain to the gear shift Efficiency.

The chain of the present invention can further utilize a structure in which the diameter of the arc segment of the inner chain piece is slightly smaller than the diameter of the arc segment of the outer chain piece, so that the chain and the chain can be changed when the chain is shifted in a variable speed transmission mechanism. The interference between the sprocket of the wheel is reduced to achieve the function of fast shifting and upshifting.

The chain of the present invention can further utilize the end edge of the guide inclined surface of the inner chain piece to approach the curved surface of the chain roller convex body, so that the sprocket of the sprocket can more easily guide the guide inclined surface through the curved surface of the chain roller of the inner chain and enter the two In the space between the inner links, the interference between the inner links and the chain teeth is effectively reduced, and the performance of fast shifting and upshifting is improved.

According to the chain of the present invention, a ring flange protruding into the receiving groove is formed on the hole edge of the inner chain pin hole by the chain roller convex body of the inner chain piece, and the chain pin is pivoted by the ring flange. The connected parts provide good mechanical strength, which ensures that the inner chain plate is protected from deformation due to stress, so that the chain maintains good transmission stability during the transmission process.

The chain of the present invention can further use the inner chain piece to form a receiving 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 piece and the chain pin, and is smoother during transmission. .

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

As shown in FIG. 1 to FIG. 3, the two inner link pieces 10 are arranged side by side. Each of the inner link pieces 10 includes an inner link body 11 and two chain roller protrusions 12. The two ends of 10 are an inner link circular arc segment 111, the two inner link circular arc segments 111 are an inner link intermediate segment 112, and the two sides of the inner link body 11 are an inner side, respectively. With one outer side, two of the chain roller protrusions 12 are formed on the inner side of the inner link body 11, and the two chain roller protrusions 12 are respectively located in the two inner link circular arc sections 111, the chain rollers. The width of the convex body 12 with respect to the inner side of the inner link body 11 is determined according to the needs of the actual product. The chain roller convex body 12 is a hollow substantially polygonal convex body. When the inner link pieces 10 are arranged in parallel, The shape of the chain roller protrusions 12 of the two inner chain pieces 10 is opposite to each other to form a substantially polygonal chain roller 100.

As shown in FIG. 1 to FIG. 3, the chain roller protrusion 12 has a convex side portion 121 and a convex peripheral wall 122, and the convex side portion 121 is located relative to the inner side of the chain roller protrusion 12. On the other side of the circular arc segment 111, the peripheral wall 122 of the convex body is connected between the convex side portion 121 and the internal circular arc segment 111. An opening formed in the convex body 12 of the chain roller faces outward.的 容容 槽 14。 A receiving slot 14. In this preferred embodiment, the chain roller convex body 12 may be a substantially triangular convex body, a substantially quadrangular convex body, a substantially pentagonal convex body, or a substantially hexagonal convex body, etc., but is not limited thereto. As shown in FIG. 4 to FIG. 7, the chain roller convex body 12 has a center C1, and the convex body side portion 121 is provided with an inner chain pin hole 13 at a position relative to the center C1. The body peripheral wall 122 has a plurality of chain roller planes 123 distributed at an equal angle with respect to the center C1, and an arc-shaped chain roller curved surface 124 is formed between each two adjacent chain roller planes 123, and each chain roller plane 123 is opposite to The vertical distance L1 is equal to the center C1 of the chain roller convex body 12, and the maximum distance L2 of each chain roller curved surface 124 with respect to the center C1 of the chain roller convex body 12 is also equal. The chain roller plane 123 is relative to the chain roller. 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 with respect to the center C1 of the chain roller convex body 12.

As shown in another embodiment shown in FIG. 8, the inner link piece 10 is connected to the hole edge of the inner chain pin hole 13 of the chain roller convex body 12 to further form a ring flange 15, and the ring flange 15 is a self-convex body. A side surface of the side portion 121 facing the accommodation groove 14 protrudes in a direction of the accommodation groove 14. The inner chain plate 10 forms a receiving groove 15 with an outward opening in the chain roller convex body 12 so as to be able to inject grease, and use the grease to provide lubrication.

As shown in FIG. 1 to FIG. 3, one end of the two outer link pieces 20 is respectively disposed outside one end of two juxtaposed inner link pieces 10, and two ends of each of the inner link pieces 10 are respectively an outer link piece circle. Between the arc segment 21, the two outer chain segments, the arc segment 21 is an outer segment middle segment 22, and each of the outer chain segment arc segments 21 is provided with an outer chain pin hole 23, and the two outer chain segments 20 is provided on the outer side of the inner link circular arc segment 111 of the inner link 10 with the outer link circular arc segment 21, and the outer chain pin hole 23 of the outer link circular arc segment 21 corresponds to The inner chain pin hole 13 of the chain roller convex body 12 of the inner link 10, and the diameter of the outer link circular arc segment 21 is greater than or equal to the diameter of the inner link circular arc segment 111. In this preferred embodiment, The diameter of the arc segment 21 of the outer link is slightly larger than the diameter of the arc segment 111 of the inner link.

As shown in FIG. 1 to FIG. 3, the chain pin 30 passes through the outer chain pin hole 23 of the outer link circular segment 21 of the outer link 20 and the chain roller protrusion of the inner link 10. The inner chain pin hole 13 of 12 is pivotally connected, so that the chain roller protrusions 12 of the two inner chain pieces 10 face each other to form a substantially polygonal chain roller 100. As shown in another embodiment shown in FIG. 9, the chain pin 30A may further form a concave portion at both axial ends thereof.

As shown in FIG. 10 and FIG. 11, in another embodiment, the inner link piece 10 forms a guide inclined surface 16 on opposite sides of the inner side surface of the inner link piece 112, and the outer link piece 20 is on the outside. The opposite sides of the inner side surface of the middle section 22 of the chain piece form a guide slope 24 respectively. Wherein, the two end edges of the guide inclined surface 16 of the inner chain piece 10 are preferably 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 speed change transmission mechanism, the chain can be connected around a plurality of sprocket wheels to transmit power. Among them, the chain of the present invention is constructed by a substantially polygonal chain roller 100 between two adjacent inner chain pieces. The chain of the substantially polygonal chain roller 100 is maintained on the basis of maintaining the necessary contact transmission between the chain roller and the sprocket. The curved surface 124 of the roller is used as the part where the sprocket is in contact with the transmission. In addition, the structure of the multiple sprocket plane 123 is used to reduce part of the solid polygonal sprocket 100. As a result, when the chain is driven and changed position between the sprocket, The polygonal chain roller can sufficiently reduce the interference of the three-element chain link unit 1 during the shifting upshift process, which is beneficial to the sprocket teeth quickly cut into the closest first three-element chain link unit or the second A three-element chain link unit improves the efficiency of the chain when changing gears. At the same time, the chain can also be constructed with substantially polygonal chain rollers 100 between the two inner chain plates 10 which are opposite to each other. The substantially polygonal chain roller 100 is used to reduce the contact area with the sprocket teeth and reduce the chain rollers and chains. Friction between wheels.

In addition, the chain of the present invention can also use the guide slopes 16 on the opposite sides of the inner side surface of the inner chain segment 10 on the inner chain segment 112, and the outer chain segment 20 on the inner side of the outer chain segment 22 The guide slopes 24 on opposite sides, through the guide slopes 16 and the guide slopes 24, during the process of shifting the gears between the sprocket and shifting gears, it can guide the sprocket teeth and help improve the chain. Improved efficiency for shifting gears. In particular, the two end edges of the guide inclined surface 16 of the inner link 10 are close to the implementation forms of the chain roller curved surfaces 124 of the two chain roller protrusions 12, which help the sprocket teeth easily pass through the inner The curved surface 124 of the chain roller of the chain plate 10 guides the guide inclined surface 16 and then enters the space between the two inner chain plates 10, effectively reducing the interference between the inner chain plate 10 and the chain teeth, and improving the performance of fast shifting and upshifting.

1‧‧‧Three-element chain link unit

10‧‧‧ Internal link

11‧‧‧Internal link body

111‧‧‧Inner link circular arc segment

112‧‧‧ Middle section of inner chain

12‧‧‧chain roller convex body

121‧‧‧ convex side

122‧‧‧ convex wall

123‧‧‧chain roller plane

124‧‧‧ Chain roller surface

13‧‧‧Inner chain pin hole

14‧‧‧ Receiving slot

15‧‧‧ ring flange

16‧‧‧Guide bevel

100‧‧‧ substantial polygonal chain roller

C1‧‧‧ Center

L1‧‧‧ The vertical distance of the plane of the chain roller relative to the center of the convex body of the chain roller

L2‧‧‧ 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 of outer chain segment

22‧‧‧ Middle section of outer chain

23‧‧‧Outer chain pin hole

24‧‧‧ Guide slope

30, 30A‧‧‧chain pin

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

Claims (10)

A chain includes multiple arrays of three-element chain link units, and multiple arrays of the three-element chain link units are connected in series. Each of the three-element chain link units includes: two inner links, each of the inner links The link includes an inner link body and two chain roller protrusions. Each of the inner links includes two inner link circular arc segments, and an inner link middle segment located between the two inner link circular arc segments. , The 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 chain pieces, and the chain roller protrusions are substantially polygonal A convex body, and the chain roller convex body has a center, an inner chain pin hole is provided on the side of the convex body at the center, two inner chain pieces are juxtaposed side by side, and two inner chain pieces have a chain The convex bodies of the rollers face each other to form a substantially polygonal chain roller; two outer links, each of the inner links includes two arc segments of the outer link and an outer chain located between the arc segments of the two outer links In the middle segment, two arc segments of the outer chain segment are each provided with an outer chain pin hole, and the two outer chain segments are respectively circled by the outer chain segment. The segment is disposed outside the arc segment of the inner link of the second link; and a chain pin that passes through the outer chain pin hole of the arc segment of the outer link of the second link and the second link The inner chain pin hole of the chain roller convex body of the inner chain piece is pivotally connected. The chain according to claim 1, wherein the chain roller convex body of the inner chain piece has a convex side portion and a convex peripheral wall, and the convex side portion is located on the chain roller convex portion with respect to the chain roller convex portion. On the other side of the arc segment of the inner link, a receiving groove with an outward opening is formed in the convex body of the chain roller of the inner link, and the peripheral wall of the convex body is connected to the side of the convex body and the inner link. Between the arc segments, the convex 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 each two adjacent chain roller planes. Roller surface. The chain according to claim 2, wherein the vertical distance of each chain roller plane with respect to the center of the chain roller convex body is equal, and the maximum distance of each chain roller surface with respect to the center of the chain roller convex body is equal. The vertical distance of the chain roller plane with respect to the center of the chain roller convex body is smaller than the maximum distance of the chain roller curved surface with respect 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 quadrangular convex body, a substantially pentagonal convex body, or a substantially hexagonal convex body. The chain according to claim 1, wherein the inner link piece forms a guide slope on opposite sides of the inner side surface of the middle section of the inner link piece, and the outer link plate is on the inner side surface of the middle section of the outer link piece A guide slope is formed on the opposite sides. The chain according to any one of claims 2 to 5, wherein the chain roller protrusion of the inner link piece forms a ring flange protruding into the accommodation groove at the hole edge of the inner chain pin hole. The chain according to any one of claims 2 to 4, wherein the inner link piece forms a guide slope on opposite sides of the inner side of the middle section of the inner link piece, and two ends of the guide slope The edges are respectively close to the curved surface of the chain roller of the two chain roller convex bodies, and the outer link pieces respectively form a guide inclined surface on opposite sides of the inner side surface of the middle section of the outer chain piece. The chain according to any one of claims 1 to 5, wherein a diameter of the arc segment of the inner link is smaller than a diameter of the arc segment of the outer link. The chain according to claim 7, wherein a diameter of the arc segment of the inner link is smaller than a diameter of the arc segment of the outer link. The chain according to any one of claims 1 to 5, wherein a concave portion is formed at each axial end of the chain pin.