CN108343708A - Chain and its inner chain sheet - Google Patents

Abstract

A chain and its inner chain piece, the inner chain piece can jointly define an engaging space with an opposite chain piece, and includes two assembly parts arranged at intervals along a longitudinal centerline, and a Each connecting part has a connecting hole, and the connecting part has a groove that is recessed in a direction away from the engaging space and has two parallel and spaced groove sides, and the chain includes Several inner chain pieces, several outer chain pieces, and several chain shafts that connect the inner chain pieces and the outer chain pieces in series and each have a central axis, and the distance between two adjacent central axes is There is an axis distance, the ratio of the axis distance to a total width of the chain is 2.39±0.12. This makes the chain more suitable for use in fields with a higher number of variable segments, and at the same time improves the smoothness of shifting.

Description

Chain and its inner chain

technical field

The invention relates to a chain, in particular to a chain suitable for use in the transmission field, and an inner chain piece of the chain.

Background technique

The chain composed of the inner chain piece, the outer chain piece, the chain shaft and the chain roller and other parts often cooperates with the sprocket for power transmission. When the chain is used on a bicycle with a speed change function, because the chain must be To switch between several sprockets with different diameters, it is necessary to provide a structure on the chain that can improve the speed change function.

Among them, the Taiwan area has announced the No. I500555 invention patent to disclose an inner chain ring piece for a bicycle chain. The inner chain ring piece has two end portions and a connecting portion connecting the end portions. In the connecting portion Towards the inner side of the other opposite link piece there is a recess, the recess has two arc edges respectively adjacent to the end portions. Although the aforementioned invention patent can expand the inner distance between the inner chain ring piece and the opposite chain piece to improve the smoothness of shifting because of the concave portion provided on the connecting portion, the arc edge of the concave portion will increase the inner chain link. Difficulty with which rings are removed from the mold.

In addition, the Taiwan region has announced the No. M338930 new patent to disclose a chain suitable for use on variable speed bicycles. The chain shafts of the adjacent inner chain pieces and the outer chain pieces are connected in series, and the middle section of each inner chain piece and each outer chain piece is provided with an oblique cut-in portion, and the corresponding inner chain piece The oblique cut-in portion of the sheet is inclined in the opposite direction, and the oblique cut-in portion of the corresponding outer chain sheet is also inclined in the opposite direction. The oblique cutting part can improve the smoothness of the chain when shifting.

In the above-mentioned new patent, the asymmetrical oblique cut-in portions are respectively provided on the corresponding inner chain pieces and the outer chain pieces. Although it can improve the smoothness of the chain when changing gears, the opposite inner chain pieces The engagement space formed between them is limited, so when the chain is shifting, each tooth of the sprocket is still not easy to snap into the corresponding engagement space, so the aforementioned new patents are relatively indistinguishable from shifting. In addition to being smooth, it is also not suitable for use in fields with a higher number of variable segments.

And Taiwan area has announced No. M287192 new type patent and discloses a kind of speed change chain that can switch between several sprockets, this speed change chain also includes outer chain piece, inner chain piece, and chain shaft, and each outer chain piece has A protruding part, the protruding part is located on the side not in contact with the bottom of the sprocket when the chain engages with the sprocket. The advantage of this structure is that without increasing the thickness of the outer chain piece, the chain can be prevented from colliding with the adjacent sprocket and generating noise during gear shifting. Although this known chain has the above advantages, the protrusions on each outer chain cannot increase the width between the inner chains that are oppositely arranged, so this chain is not suitable for It is used in occasions where the number of variable speed stages is higher.

Contents of the invention

The object of the present invention is to provide a chain and an inner link of the chain which overcome at least one disadvantage of the prior art.

The inner chain piece of the present invention can jointly define an engaging space with an opposite chain piece, and the inner chain piece includes two joint parts arranged at intervals along a longitudinal center line, and a connection connecting the joint parts Each joint part has a joint hole, and the connecting part has a groove recessed in a direction away from the engaging space, and the groove has two parallel and spaced groove sides.

Further, the groove edge is perpendicular to the longitudinal centerline.

Further, the relative chain piece has a relative groove recessed away from the engaging space, the relative groove has two parallel and spaced relative groove sides, the groove sides are inclined to the longitudinal centerline, and the inner The groove side of the chain piece is in the same direction as the opposite groove side of the opposite chain piece.

Further, the groove spans the longitudinal centerline.

Further, the groove has two inclined surfaces located on opposite sides of the longitudinal centerline, and each inclined surface gradually inclines from the longitudinal centerline to the outer peripheral edge of the inner chain piece.

Further, each joint part has an outer ring surface away from the opposite link piece, the connecting part has an outer connection surface connected to the outer ring surface, and the outer connection surface is flush with the outer ring surface. on the same plane.

Further, each joint part has an outer ring surface far away from the opposite link piece, the connecting part has an outer connection surface connected to the outer ring surface, and the outer connection surface is not located on the same plane as the outer ring surface , and the outer connecting surface protrudes farther from the outside of the engaging space than the outer ring surface.

Further, it also includes an inclined guide area surrounding and connected to the outer peripheral edge of the connecting part and the connecting part, the inclined guiding area extends between the connecting parts along the outer peripheral edge, and extends from the longitudinal center The line gradually slopes toward the outer periphery.

Further, each connecting portion also has a protruding post protruding toward the engaging space, and the group connecting hole passes through the protruding post.

The chain of the present invention can be shifted on a sprocket set with twelve coaxial sprockets, each sprocket has several teeth arranged around a center of rotation, and the chain contains several The inner chain pieces, the several outer chain pieces, and the chain shafts connecting the adjacent inner chain pieces and the outer chain pieces in series, each chain shaft has a central axis, two phases There is an axial distance between the central axes of the adjacent chain shafts, which is matched with the distance between the adjacent teeth on each sprocket; and each axial distance of the chain is matched with The ratio of a total width of the chain is 2.39±0.12.

Further, each assembling part has an outer ring surface adjacent to the outer chain piece, the connecting part has an outer connection surface connected to the outer ring surface, and the outer connection surface is flush with the outer ring surface. on the same plane.

Further, each joint part has an outer ring surface adjacent to the outer chain piece, the connecting part has an outer connection surface connected to the outer ring surface, and the outer connection surface is not located on the same plane as the outer ring surface , and the outer connecting surface protrudes farther from the outside of the engaging space than the outer ring surface, and the ratio of the aforementioned axis distance to a maximum outer width of the corresponding inner chain piece is 2.39±0.12.

Further, the ratio of the aforementioned axis distance to a maximum inner width of the engaging space is 5.5±0.12. The beneficial effect of the present invention is that: the width of the engagement space is enlarged through the groove of the inner chain piece, and the groove edges spaced parallel to each other on the groove provide a relatively wide entrance, which can facilitate the sprocket Each tooth of the chain is snapped in. The aforementioned structure not only facilitates the drawing, but also improves the smoothness of the chain when changing gears, and at the same time makes the chain suitable for applications with a higher number of variable segments.

Description of drawings

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein:

Fig. 1 is a perspective view of a first embodiment of the inner chain sheet of the present invention;

Figure 2 is a side view of the first embodiment;

Fig. 3 is a sectional reference drawing of the first embodiment, which illustrates the relative relationship between the inner chain piece and an opposite chain piece;

Fig. 4 is a sectional view taken along line 4-4 in Fig. 2;

Fig. 5 is a schematic diagram of a use state of the first embodiment, illustrating the relative relationship between the inner chain sheet and a chain;

Fig. 6 is a reference diagram of a state of use of the first embodiment, illustrating the relative relationship between the chain assembled with the inner chain piece and a sprocket set;

Fig. 7 is a cross-sectional reference drawing of a second embodiment of the inner chain piece of the present invention, which shows the relative relationship between the inner chain piece and the opposite chain piece;

Fig. 8 is a schematic diagram of a state of use of the second embodiment, illustrating the relative relationship between the inner chain piece and the chain;

Fig. 9 is a side view of a third embodiment of the inner chain sheet of the present invention;

Figure 10 is a schematic cross-sectional view taken along line 10-10 in Figure 9, illustrating the relative relationship between the inner chain piece, the opposite chain piece and a locking tooth;

Figure 11 is a side view of a fourth embodiment of the inner chain sheet of the present invention; and

Fig. 12 is a side view of a fifth embodiment of the inner link of the present invention.

Detailed ways

Referring to Figures 1, 2 and 3, a first embodiment of the inner chain piece 1 of the chain of the present invention can cooperate with a relative chain piece 2, and jointly define a snap-in space 3, and the structure of the relative chain piece 2 can be Same as this inner chain sheet 1. In this embodiment, the inner chain piece 1 includes two assembling parts 11 arranged at intervals along a longitudinal centerline 10, a connecting part 12 connecting the assembling parts 11, and a connecting part surrounding and connecting the assembling parts. 11 and the inclined guide area 13 on the outer periphery of the connecting portion 12 . Each connecting portion 11 has a base wall 111 integrally connected with the connecting portion 12, a protruding post 112 protruding from the base wall 111 to the opposite link piece 2, and a protruding post passing through the base wall 111 and the protruding post. 112 , the base wall 111 has an outer ring surface 114 away from the opposite link 2 , and an inner ring surface 115 surrounding the stud 112 .

The connecting portion 12 has a groove 121 recessed away from the engagement space 3, and an outer connecting surface 122 away from the relative chain piece 2. The groove 121 has two intervals and is adjacent to the set The groove edge 123 of the connection portion 11, in this embodiment, the groove edge 123 is perpendicular to and straddles the longitudinal centerline 10, and is spaced in parallel, that is, the aforementioned groove edge 123 is symmetrical across the longitudinal centerline 10, in this embodiment , the outer connection surface 122 is connected to the outer ring surface 114 of the assembly part 11, and is flush on the same plane, and the longitudinal centerline 10 can roughly pass through the center point of each assembly hole 113 .

Referring to Fig. 1, 3, 4, the slanted guide area 13 faces the opposite link 2 and includes two slanted guide surfaces 131 on opposite sides of the longitudinal centerline 10, each slanted guide surface 131 is along the The outer peripheral edge of the inner chain piece 1 extends and is connected between the assembling portion 11 and the connecting portion 12 , and the above-mentioned inclined guide surface 131 is also gradually inclined from the longitudinal centerline 10 toward the outer peripheral edge.

Referring to Figures 1, 2, and 3, the inner chain piece 1 in this embodiment can be arranged inside and outside the opposite chain piece 2 with the same structure when in use, and jointly define the engaging space 3. Preferably, the opposite chain piece The sheet 2 also has an opposite groove 21 facing the engagement space 3, and the opposite groove 21 also has two opposite groove edges 211 corresponding to the groove edges 123 of the inner chain sheet 1, that is, the aforementioned opposite The groove edge 211 is parallel to and equal in width to the groove edge 123 of the inner chain piece 1 .

Referring to Figures 2, 3, 5, and 6, specifically, the inner chain pieces 1 in this embodiment can be used in groups of two and combined with several outer chain pieces 4 and several chain shafts 5. Form a chain, each chain shaft 5 has a central axis 51, and there is an axial distance 52 between the said central axes 51 of two adjacent chain shafts 5, and this axial distance 52 is equal to a total width of the chain The ratio of 6 is 2.39 ± 0.12.

The chain with the aforementioned structure can be shifted and operated on a sprocket set 9, which has twelve coaxial sprockets 90, and each sprocket 90 has several clips arranged around a center of rotation. teeth 91, and the distance between adjacent locking teeth 91 matches each axis distance 52 of the chain.

In this embodiment, when the inner chain piece 1 is in use, since the groove 121 of the inner chain piece 1 is recessed in a direction away from the engaging space 3, the opposite chain piece 2 also has a groove corresponding to the groove 121. The relative groove 21, so the cooperation of the aforementioned structure, can effectively expand the width of the engaging space 3, and the groove sides 123 of the groove 121 are parallel and spaced apart, therefore, the engaging space can be effectively enlarged. The width of the opening on the space 3 for the snap teeth 91 of each sprocket 90 to snap into, so in this embodiment, when the chain is shifting, the snap teeth 91 on each sprocket 90 can be snapped into the sprocket more easily. In the engaging space 3 . In addition, the oblique guide area 13 of each inner chain piece 1 can also make the locking teeth 91 of each sprocket 90 more easily introduced into the engaging space 3, so the aforementioned oblique guide area 13 can increase the speed of the assembled chain. Smoothness and convenience during meshing, in addition to improving the smoothness of the chain during variable speed operation in this embodiment, and making the chain more suitable for use in occasions with a higher variable number of segments, because each inner chain piece 1 The groove sides 123 are all parallel and spaced apart, so the ease of drafting can also be increased.

Referring to Figures 7 and 8, a second embodiment of the inner chain piece 1 of the present invention is also matched with the opposite chain piece 2, and jointly defines the engaging space 3, and the structure of the inner chain piece 1 is the same as that of the first embodiment Similar to the example, the difference is: the outer connecting surface 122 of the connecting part 12 is not on the same plane as the outer annular surface 114 of each joint part 11, wherein the outer connecting surface 122 is smaller than the outer The ring surface 114 protrudes outward away from the engaging space 3 . The change of the aforementioned structure can further expand the width of the engaging space 3 .

Specifically, the inner chain pieces 1 in this embodiment can also be used in groups of two, and cooperate with the outer chain piece 4 and the chain shaft 5 to form the chain. Preferably, each The connecting portion 12 of each inner chain piece 1 protrudes outward, and the outer connecting surface 122 of the connecting portion 12 is flush with an outer side surface 41 of the corresponding outer chain piece 4, and the two adjacent ones The ratio of the axial distance 52 between the chain shafts 5 to a maximum outer width 7 of the inner chain plate 1 is 2.39±0.12. In addition, the ratio of the aforementioned axis distance 52 to a maximum inner width 8 of each engaging space 3 is 5.5±0.12, so that each engaging space of the chain is consistent, which can effectively increase the smoothness of operation and shifting. The chain with the aforementioned structure is more suitable for gear shifting and speed change on the sprocket set 9 (see FIG. 6 ) having twelve coaxial sprockets 90 .

Referring to Fig. 9, 10, the structure of a third embodiment of the inner chain sheet 1 of the present invention is similar to the first embodiment, and the groove 121 also has two outer peripheries from the longitudinal centerline 10 to the inner chain sheet 1 The edge of the inclined surface 124 is gradually lowered and inclined, and the inclined surface 124 can make the locking teeth 91 slide into the engaging space 3 more smoothly. The inclined surface 124 of the third embodiment of the present invention can further increase the width of the engaging space 3 in the area close to the outer circumference, so as to facilitate the engagement of the locking teeth 91, and the aforementioned inclined surface 124 will not expand the The locking space 3 is close to the width of the area of the longitudinal centerline 10 , so that the engaging teeth 91 and the chain can be engaged more stably.

Referring to FIG. 11 , the structure of a fourth embodiment of the inner chain 1 of the present invention is also similar to that of the first embodiment, the difference is that the groove 121 of the connecting portion 12 is located on the longitudinal centerline 10 One side, and the groove side 123 of the groove 121 is perpendicular to the longitudinal centerline 10 .

Referring to FIG. 12 , the structure of a fifth embodiment of the inner chain sheet 1 of the present invention is similar to that of the fourth embodiment, except that the groove edge 123 of the groove 121 is inclined to the longitudinal centerline 10 . In the fourth and fifth embodiments of the present invention, the groove 121 is located on one side of the longitudinal centerline 10 , which also has the effect as described in the third embodiment.

As can be seen from the above description, the structure of the inner chain piece 1 of the present invention is not only novel, but when the inner chain piece 1 is installed on the chain and defines the engagement space 3 together with the opposite chain piece 2, the inner chain piece The groove 121 of the sheet 1 can expand the width of the engagement space 3, and the groove edges 123 spaced parallel to each other on the groove 121 can also provide a wide entrance to facilitate the locking of each sprocket 90. 91 is snapped in, so the inner chain sheet 1 of the present invention has the convenience of drafting and improves the smoothness of the chain when shifting, and is also suitable for use in higher occasions with variable segments.

But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

Claims (13)

1. a kind of inner chain sheet of chain can define an engaging space jointly by opposite chain piece with one, which includes：

Two group connecting parts are arranged along a longitudinal centre line interval, and there are one joining holes for each group connecting part tool：And

One interconnecting piece connects the group connecting part, and has there are one toward the recessed groove in the direction far from the engaging space, this is recessed There are two the trough rims of parallel interval for slot tool.

2. the inner chain sheet of chain according to claim 1, which is characterized in that the trough rim is perpendicular to the longitudinal centre line.

3. the inner chain sheet of chain according to claim 1, with respect to chain piece tool, there are one the sides toward the separate engaging space for this To recessed confronting grooves, there are two the opposite trough rims of parallel interval for confronting grooves tool, which is characterized in that the trough rim tilts It is consistent in the opposite trough rim inclined direction of the longitudinal centre line, trough rim chain piece opposite with this of the inner chain sheet.

4. the inner chain sheet of chain according to claim 1, which is characterized in that the groove crosses over the longitudinal centre line.

5. the inner chain sheet of chain according to claim 1, which is characterized in that there are two be located at the longitudinal center for groove tool The inclined surface of line opposite side, each inclined surface are gradually to be tilted from the longitudinal centre line toward the outer peripheral edge of the inner chain sheet.

6. the inner chain sheet of chain according to any one of claim 1 to 5, which is characterized in that each group connecting part has One outer ring surface far from this with respect to chain piece, there are one the outer joint face for connecting the outer ring surface, the outer connections for interconnecting piece tool Face and the outer ring surface be flush it is in the same plane.

7. the inner chain sheet of chain according to any one of claim 1 to 5, which is characterized in that each group connecting part has One outer ring surface far from this with respect to chain piece, there are one the outer joint face for connecting the outer ring surface, the outer connections for interconnecting piece tool Face is non-in the same plane with the outer ring surface, and the past outside far from the engaging space of the outer joint face outer ring surface It is prominent.

8. the inner chain sheet of chain according to claim 1, which is characterized in that also surrounded comprising one and be connected to described group The areas Xie Dao of the outer peripheral edge of socket part and the interconnecting piece, between which extends in the group connecting part along the outer peripheral edge, and by The longitudinal centre line is gradually tilted toward the outer peripheral edge.

9. the inner chain sheet of chain according to claim 8, which is characterized in that each group connecting part also have that there are one the past cards Space protruded stigma outstanding is closed, and the joining hole runs through the protruded stigma.

10. a kind of chain speed change, the chain wheel set can have 12 coaxial sprocket wheels, each sprocket wheel in a chain wheel set It is equipped with several latches, which is characterized in that the chain includes：

Several inner chain sheets according to claim 1 are spaced setting and define the engaging space described in one jointly two-by-two；

Several outer chain sheets, also interval setting two-by-two；And

Several chain rivets concatenate the adjacent inner chain sheet and the outer chain sheet, and there are one central axis for each chain rivet tool, two-by-two All there are one axial line distance, the axial line distance institutes adjacent on each sprocket wheel for tool between the central axis of adjacent chain rivet The distance stated between latch matches, and aforementioned axis distance and the ratio of an overall width of the chain are 2.39 ± 0.12.

11. chain according to claim 10, which is characterized in that there are one the neighbouring outer chain sheets for each group connecting part tool Outer ring surface, for interconnecting piece tool there are one the outer joint face for connecting the outer ring surface, which is to flush with the outer ring surface Ground is in the same plane.

12. chain according to claim 10, which is characterized in that there are one the neighbouring outer chain sheets for each group connecting part tool Outer ring surface, interconnecting piece tool there are one the outer joint face for connecting the outer ring surface, the outer joint face with the outer ring surface is non-is located at On same plane, and the outer joint face outer ring surface toward far from the engaging space outside protrude, aforementioned axis distance with The ratio of the outer width of one maximum of the corresponding inner chain sheet is 2.39 ± 0.12.

13. chain according to claim 10, which is characterized in that aforementioned axis distance engages a maximum in space with this The ratio of insied width is 5.5 ± 0.12.