Mute chain and fluted disc

Abstract

The utility model discloses a mute chain and a fluted disc. The mute chain comprises a plurality of inner chain links, a plurality of outer chain links and a plurality of pivots, wherein the outer chain links are arranged on the outer sides of the inner chain links in a staggered mode, and the pivots are connected with the outer chain links and the inner chain links in series. Each inner chain link comprises an inner piece unit and an inner chain body which is arranged on the outer side of the inner piece unit and is made of a non-metal material. The inner chain body is provided with a meshing protruding part protruding in the meshing direction. Each outer chain link comprises two outer pieces which are oppositely arranged and arranged on the outer sides of the adjacent inner chain links respectively, and the outer chain links and the adjacent inner chain links are matched to define meshing spaces. The fluted disc comprises a ring body and a plurality of meshing teeth, the meshing teeth are meshed in the meshing space, and every two adjacent meshing teeth are matched to define a tooth bottom used for meshing of the meshing protruding parts. Through the structural design of the mute chain and the fluted disc, the high-strength characteristic of an existing chain and the vibration low-noise characteristic of a transmission belt can be fused, and a brand-new transmission component with high transmission performance is generated.

Description

Technical Field

[0001] This utility model relates to a power transmission component, and more particularly to a chain and a toothed disc. Background Technology

[0002] In terms of power transmission technology for electric motor systems, it can be broadly divided into belt drive and chain drive. Belt drive has advantages such as low vibration and noise and simple maintenance, while chain drive has advantages such as high rigidity, easy assembly, and the ability to be assembled by splicing without damaging the frame. Therefore, if belt drive technology could be integrated into chain drive, a completely new transmission component with high transmission performance could be created. In addition, because existing chains require inner and outer links to mesh alternately with the sprocket, the inner and outer links can only be designed with the same pitch, resulting in a lack of flexibility in the design of chain links. Utility Model Content

[0003] The purpose of this invention is to provide a silent chain that combines the advantages of both belt drive and chain drive.

[0004] Therefore, the silent chain of this utility model includes multiple inner chain links arranged along the transmission direction, multiple outer chain links arranged at intervals along the transmission direction, and multiple pivots connecting the outer chain links and the inner chain links, each pivot enabling the corresponding inner chain link and outer chain link to rotate relative to each other.

[0005] At least one of the inner links includes an inner plate unit and a non-metallic inner link body disposed outside the inner plate unit. The inner link body has an engagement protrusion extending in the engagement direction. The outer links are staggered outside the inner links, and each outer link includes two opposing outer plates disposed outside adjacent inner links, and the outer links cooperate with adjacent inner links to define an engagement space.

[0006] The silent chain of this utility model includes an inner plate unit comprising at least one inner plate, the inner plate having a pivot portion and two internal through holes spaced apart from each other in the pivot portion, the inner chain body also having a main body portion and two through holes located in the main body portion and respectively communicating with the internal through holes, the meshing protrusion of the inner chain body protruding from the main body portion in the meshing direction, the outer plate having two external through holes respectively communicating with the adjacent through holes and the internal through holes, the pivot rotatably passing through the corresponding internal through holes and the corresponding through holes, and finally fixed in the corresponding external through holes.

[0007] The silent chain of this utility model includes an inner plate unit comprising two inner plates arranged at intervals and two bushings. The bushings are respectively inserted through and protrude from the inner through holes of the inner plates arranged at intervals. The main body covers the pivot portion of the inner plate and the outer periphery of the bushings. The pivots are respectively rotatably inserted in the bushings.

[0008] The silent chain of this utility model includes an inner plate unit comprising two inner plates arranged at relative intervals. Each inner plate also has two annular flange portions that surround the inner through hole and protrude from the pivot portion toward the other inner plate. The main body portion covers the pivot portion of the corresponding inner plate and the outer periphery of the flange portion. The pivot can also be rotatably inserted through the flange portion.

[0009] The silent chain of this utility model has an inner plate with a protrusion extending from the pivot portion toward the meshing direction, and the length of the protrusion extending in the meshing direction is not greater than the length of the meshing protrusion of the inner chain body extending in the meshing direction, and the meshing protrusion of the inner chain body covers the protrusion of the corresponding inner plate.

[0010] The silent chain of this utility model has an inner plate with an outer side opposite to the meshing direction, and the main body of the inner chain body covers the pivot portion of the inner plate and is flush with the outer side.

[0011] The silent chain of this utility model also has an inner plate with an inner groove.

[0012] The silent chain of this utility model has an inner chain body that fills the inner hole groove.

[0013] The silent chain of this utility model has an outer groove in the inner chain body, and the outer groove communicates with the inner groove.

[0014] The silent chain of this utility model further includes a columnar body passing through the interconnected inner and outer grooves in the inner link.

[0015] The silent chain of this utility model has an inner chain body that encapsulates and fixes the inner sheet unit inside by an encapsulation injection method.

[0016] The silent chain of this invention has a pitch difference between the inner link and the outer link that is greater than 0.3 mm, but less than the smaller of the two pitches.

[0017] Another objective of this invention is to provide a toothed disc for use with the aforementioned silent chain.

[0018] Therefore, the toothed disc of this utility model is suitable for driving the aforementioned silent chain. The toothed disc includes a ring body and a plurality of meshing teeth that are spaced apart and protrude from the outer periphery of the ring body around its axis. The meshing teeth are used to engage with the meshing space of the outer links of the silent chain. Each meshing tooth has a tooth portion protruding radially outward from the ring body and a tooth crown portion connected to the end of the tooth portion. The tooth portion has an inner surface and an outer surface opposite to the inner surface. The teeth portions of two adjacent meshing teeth cooperate to define a tooth root for the meshing protrusion of the silent chain to engage.

[0019] The toothed disc of this utility model has a crown portion that is thicker than the tooth portion, and the crown portion extends and protrudes from the inner or outer side of the tooth portion in the width direction, or extends and protrudes symmetrically from the inner and outer sides of the tooth portion in the width direction.

[0020] In the toothed disc of this invention, the thickness of the tooth crown is not greater than the width of the inner link.

[0021] The toothed disc of this utility model has an inner side and an outer side opposite to the inner side, and has at least one drain groove that is recessed into the bottom of the tooth in a radially outwardly flared shape, the drain groove being recessed into the inner side or the outer side.

[0022] The toothed disc of this invention has meshing teeth that only mesh with the outer chain link.

[0023] The beneficial effects of this utility model are as follows: through the structural design of the silent chain and the toothed disc, the high strength characteristics of the existing chain and the low vibration and noise characteristics of the transmission belt can be combined to produce a brand-new transmission component with high transmission performance. Attached Figure Description

[0024] Other features and effects of this utility model will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a perspective view illustrating the structure of a first embodiment of the silent chain of the present invention and an embodiment of the toothed disc of the present invention. Only a partial section of the silent chain is shown in the figure.

[0026] Figure 2 It is an incomplete side view, illustration Figure 1 The structure of the silent chain and the toothed disc;

[0027] Figure 3 It is a longitudinal sectional view illustrating the structure of this embodiment of the toothed disk;

[0028] Figure 4 It is an exploded three-dimensional view illustrating the structure of the first embodiment of the silent chain;

[0029] Figure 5 It is a three-dimensional diagram illustrating the structure of an inner link of the first embodiment of the silent chain;

[0030] Figure 6 It is an exploded three-dimensional view illustrating the structure of an inner sheet unit of the first embodiment of the silent chain;

[0031] Figure 7 It is a side view illustrating the structure of the inner link of the first embodiment of the silent chain;

[0032] Figure 8 yes Figure 7 Sectional view along section line AA;

[0033] Figure 9 It is a perspective view illustrating the structure of the inner link of a second embodiment of the silent chain;

[0034] Figure 10 It is an exploded three-dimensional view illustrating the structure of the inner sheet unit of the second embodiment of the silent chain;

[0035] Figure 11 It is a perspective view illustrating the structure of the inner link of a third embodiment of the silent chain;

[0036] Figure 12 It is a side view illustrating the structure of the inner link of the third embodiment of the silent chain;

[0037] Figure 13 yes Figure 12 Sectional view along section line BB;

[0038] Figure 14 This is an exploded three-dimensional view illustrating the structure of the inner sheet unit of a fourth embodiment of the silent chain;

[0039] Figure 15 It is a side view illustrating the structure of the inner link of the fourth embodiment of the silent chain;

[0040] Figure 16 yes Figure 15 Sectional view along the CC section line;

[0041] Figure 17 This is an exploded perspective view illustrating the structure of the inner sheet unit of a fifth embodiment of the silent chain;

[0042] Figure 18It is a side view illustrating the structure of the inner link of the fifth embodiment of the silent chain;

[0043] Figure 19 yes Figure 18 Sectional view along section line DD;

[0044] Figure 20 This is a perspective view illustrating the structure of the inner link of a sixth embodiment of the silent chain;

[0045] Figure 21 It is a side view illustrating the structure of the inner link of the sixth embodiment of the silent chain;

[0046] Figure 22 yes Figure 21 Sectional view along section line FF;

[0047] Figure 23 This is a perspective view illustrating the structure of the inner link of a seventh embodiment of the silent chain;

[0048] Figure 24 It is a side view illustrating the structure of the inner link of the seventh embodiment of the silent chain;

[0049] Figure 25 yes Figure 24 A cross-sectional view along the GG section line. Detailed Implementation

[0050] Before this utility model is described in detail, it should be noted that similar components are represented by the same numbers in the following description.

[0051] See Figure 1 , Figure 2 , Figure 3 One embodiment of the toothed disc 3 of this utility model includes a ring-shaped ring body 31 and a plurality of meshing teeth 32 protruding from the outer periphery of the ring body 31 around its axis. The ring body 31 has an inner side surface 312 and an outer side surface 311 opposite to each other in a width direction W, and has a plurality of drainage grooves 33 recessed on the outer side surface 311 and the inner side surface 312 around its axis.

[0052] Each of the meshing teeth 32 has a tooth portion 321 protruding radially outward from the ring body 31, and a crown portion 324 connected to the protruding end of the tooth portion 321. The tooth portion 321 has an inner tooth surface 323 and an outer tooth surface 322 opposite to each other in the width direction W. The tooth portions 321 of two adjacent meshing teeth 32 will cooperate to define a tooth root 30 for the engagement of the silent chain 4. The drain groove 33 is located near the tooth root 30, and gradually recesses into the corresponding tooth root 30 in a radially outward flared shape, forming an inclined groove edge.

[0053] The crown portion 324 extends and protrudes from the inner surface 323 and the outer surface 322 of the tooth portion 321 in the width direction W, so the thickness of the crown portion 324 in the width direction W is greater than the thickness of the tooth portion 321 in the width direction W. However, in another embodiment of this utility model, the crown portion 324 may extend and protrude outward from only one of the inner surface 323 and the outer surface 322 of the tooth portion 321.

[0054] See Figure 1 , Figure 4 This utility model discloses a first embodiment of a silent chain 4, suitable for power transmission when used with the toothed disc 3. The silent chain 4 includes multiple inner chain links 5 arranged along a transmission direction D, multiple outer chain links 6 arranged at intervals and staggered outside the inner chain links 5 along the transmission direction D, and multiple pivots 7 connecting the inner chain links 5 and the outer chain links 6. The thickness D1 of the tooth crown 324 is not greater than the width D2 of the inner chain link 5. The pitch D3 of the inner chain links 5 and the pitch D4 of the outer chain links 6 may be different. In this embodiment, the difference between the pitch of the inner chain links 5 and the pitch of the outer chain links 6 is greater than 0.3 mm, but less than the smaller of the two pitches.

[0055] It should be noted that the silent chain 4 is in the form of a loop. For ease of explanation, the attached diagram only shows a partial section of the silent chain 4. The following will use one of the inner links 5 and one of the outer links 6 as an example to illustrate the structure.

[0056] See Figures 4-8 The inner link 5 includes an inner sheet unit 51 and an inner link body 52 made of non-metallic material covering the inner sheet unit 51. The non-metallic material is, for example, but not limited to, rubber or other plastic materials.

[0057] The inner plate unit 51 includes two opposing inner plates 511 and two bushings 516. Each inner plate 511 has a pivot portion 512 and a protrusion 514 extending from the pivot portion 512 toward the meshing direction of the gear disk 3. Each pivot portion 512 has two spaced-apart inner through holes 513, and the bushings 516 are inserted and fixed in the inner through holes 513 and protrude outward from the outer side of the inner plate 511. Each protrusion 514 has a through inner groove 515.

[0058] The inner chain body 52 covers and is fixed to the inner sheet 511. It has a main body portion 521 that covers the pivot portion 512 of the inner sheet 511 and the outer periphery of the bushing 516, and an engaging protrusion 522 that protrudes from the main body portion 521 in the engagement direction, covers the protrusion 514, and fills the inner groove 515. The main body portion 521 has two through holes 523 that communicate with the inner through hole 513, allowing the bushing 516 to pass through and be exposed.

[0059] The outer link 6 includes two spaced-apart outer pieces 61, which are staggered and arranged outside the corresponding two inner links 52. The outer pieces 61 of the outer link 6 cooperate with the inner links 5 to define a meshing space 60 with an opening facing the meshing direction. Each outer piece 61 has two external through holes 610, which communicate with the through holes 523 of the adjacent inner links 5.

[0060] See Figure 1 , Figure 4 The pivot 7 is rotatably passed through the bushing 516 and finally fixed in the outer through hole 610 of the outer piece 61, thereby connecting the inner link 5 and the outer link 6 together.

[0061] See Figure 2 , Figure 4 , Figure 5 When the first embodiment of the silent chain 4 of this utility model is used with the toothed disc 3, the silent chain 4 allows the meshing teeth 32 of the toothed disc 3 to engage in the meshing space 60 located in the outer link 6. The toothed disc 3 allows the silent chain 4 to engage with the meshing protrusion 522 located in the inner link 5 in the meshing direction through the tooth base 30. At this time, the tooth crown 324 of the meshing tooth 32 is confined between the corresponding outer plates 61, which can be used to prevent the silent chain 4 from falling off laterally, making the silent chain 4 more stable during the meshing transmission with the toothed disc 3.

[0062] When the toothed disc 3 is driven, the meshing teeth 32 that mesh with the meshing space 60 will push the corresponding meshing protrusions 522 of the inner chain body 52 in the transmission direction D, thereby driving the silent chain 4 to move.

[0063] Because the inner chain body 52 of the inner link 5 is made of non-metallic material, the noise when the inner chain body 52 meshes with the toothed disc 3 can be significantly reduced. Therefore, while maintaining the high rigidity and easy assembly of existing chains, it also combines the quietness of belt drives. Furthermore, the structural design of the inner link 5 and the outer link 6 means that the pitch of the inner link 5 and the pitch of the outer link 6 do not necessarily need to be similar. In other words, the pitches of the inner link 5 and the outer link 6 can be designed with different sizes and stages, depending on the usage requirements.

[0064] Furthermore, the design of the drain groove 33 of the toothed disc 3 allows the dirt adhering to the toothed disc 3 when it meshes with the silent chain 4 to slide radially inward along the inclined edge of the drain groove 33, which can greatly reduce the accumulation of dirt on the toothed disc 3. Moreover, since the drain groove 33 is an open structure, it is also very convenient to clean.

[0065] See Figure 9 , Figure 10 The second embodiment of the silent chain 4 of this utility model differs from the first embodiment in that the structural design of the inner plate unit 51 of the inner link 5 is as follows. For ease of explanation, the following description will only focus on the differences between the embodiments.

[0066] In this second embodiment, the inner sheet 511 of the inner sheet unit 51 only has the pivot portion 512, that is, the protrusion is not provided. The inner chain body 52 covers the outer periphery of the inner sheet 511 and the bushing 516.

[0067] The installation and connection methods of the inner link 5, the outer link 6 and the pivot 7 in the second embodiment of the silent chain 4 of this utility model are the same as those in the first embodiment, and the way they are used with the toothed disc 3 is also the same as that in the first embodiment, so they will not be described in detail.

[0068] See Figures 11-13 The difference between a third embodiment of the silent chain 4 of this utility model and the first embodiment lies in the structural design of the inner chain link 5.

[0069] In this third embodiment, the pivot portion 512 of the inner sheet 511 has an outer side 510 opposite to the engagement direction. The main body portion 521 of the inner chain body 52 covering the pivot portion 512 is flush with the outer side 510, thereby exposing the outer side 510 of the inner sheet 511.

[0070] See Figures 14-16 The fourth embodiment of the silent chain 4 of this utility model differs from the first embodiment in that the inner chain link 5 has a structural design.

[0071] In this fourth embodiment, the engaging protrusion 522 of the inner chain body 52 passes through an outer hole groove 524 that communicates with the inner hole groove 515 of the inner piece 511. The inner chain link 5 also includes a columnar body 53 that passes through and is fixed to the inner hole groove 515 and the outer hole groove 524. This design improves the structural strength of the inner chain link 5.

[0072] See Figures 17-19 The fifth embodiment of the silent chain 4 of this utility model differs from the first embodiment in that the inner chain link 5 has a structural design.

[0073] In this fifth embodiment, the inner sheet unit 51 of the inner link 5 is not provided with the bushing. The inner sheet 511 also has two annular flange portions 517 protruding from the pivot portion 512 toward the other inner sheet 511 and respectively surrounding the inner through hole 513. The inner sheets 511 abut against each other with the flange portions 517 facing each other. The main body portion 521 of the inner chain body 52 covers the pivot portion 512 of the inner sheet 511 and covers the outer periphery of the flange portions 517.

[0074] The pivot (not shown) is rotatably inserted into the corresponding inner through hole 513 and the flange portion 517, and its two ends are respectively inserted and fixed into the corresponding outer through hole (not shown) of the outer piece (not shown).

[0075] See Figures 20-22 The sixth embodiment of the silent chain 4 of this utility model differs from the first embodiment in that the inner chain link 5 has a structural design.

[0076] In this sixth embodiment, the inner link 5 includes an inner sheet unit 51 and an inner link body 52 covering the inner sheet unit 51. The inner sheet unit 51 includes only one inner sheet 511. The thickness of the inner sheet 511 in the width direction W is greater than the thickness of the inner sheet 511 in the first embodiment. The inner link body 52 covers the inner sheet 511 and fills the inner hole groove 515 of the inner sheet 511.

[0077] The pivot (not shown) is rotatably inserted through the inner through hole 513 of the corresponding inner piece 511 and the through hole 523 of the inner chain body 52, and is fixed to the corresponding outer piece (not shown).

[0078] See Figures 23-25The difference between a seventh embodiment of the silent chain 4 of this utility model and the sixth embodiment lies in the structural design of the inner chain link 5.

[0079] In this seventh embodiment, the inner sheet unit 51 further includes two bushings 516 that are respectively inserted through and fixed in the inner sheet 511 through the inner through holes 513 and respectively inserted through the through holes 523 in the inner chain body 52. ​​The pivot (not shown) is rotatably inserted in the bushing 516 of the corresponding inner sheet unit 51.

[0080] In summary, the structural design of this silent chain 4 not only integrates the high strength characteristics of existing chains and the low vibration and noise characteristics of drive belts, but also allows for convenient design of the inner link 5 and the outer link 6. This means that the pitch of the inner link 5 and the outer link 6 does not necessarily need to be similar. Depending on the usage requirements, the pitch of the inner link 5 and the outer link 6 can be designed with different dimensions and stages to adapt to various vehicle models and chain length requirements.

[0081] Furthermore, the outer link 6, in conjunction with the inner link 5, defines the meshing space 60. The outer piece 61 defining the meshing space 60 is respectively positioned on the outer surface 322 and inner surface 323 of the corresponding meshing tooth 32, providing a guiding and chain-preventing function. The design of the meshing protrusion 522 of the inner link 52 and the crown 324 of the meshing tooth 32 of the gear disc 3 increases the contact area between the meshing inner link 5 and the meshing tooth 32, thereby increasing kinetic energy transmission efficiency. The crown 324 of the meshing tooth 32 extends and protrudes in the width direction W, significantly improving the structural strength, rigidity, and wear resistance of the entire gear disc 3, enabling it to withstand higher torques. The gear disc 3 also features a simple structure that is easy to manufacture and maintain.

[0082] Therefore, the silent chain 4 and the toothed disc 3 of this utility model are indeed quite innovative and convenient creations, and they can indeed achieve the purpose of this utility model.

[0083] The above description is merely an embodiment of this utility model and should not be construed as limiting the scope of this utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of this utility model shall still fall within the scope of this utility model.

Claims

1. A silent chain, comprising a plurality of inner links arranged along a transmission direction, a plurality of outer links spaced apart along the transmission direction, and a plurality of pivots connecting the outer links and the inner links, each pivot enabling relative rotation between the corresponding inner and outer links, characterized in that: At least one of the inner links includes an inner sheet unit and a non-metallic inner chain body covering the outer side of the inner sheet unit. The inner chain body has a meshing protrusion extending in the meshing direction. The outer links are staggered and arranged outside the inner links. The outer links include two oppositely arranged outer sheets, which are respectively disposed outside the adjacent inner links. The outer links cooperate with the adjacent inner links to define a meshing space.

2. The silent chain according to claim 1, characterized in that: The inner sheet unit includes at least one inner sheet, the inner sheet having a pivot portion and two internal through holes spaced apart from each other in the pivot portion. The inner chain body also has a main body portion and two through holes located in the main body portion and respectively communicating with the internal through holes. The meshing protrusion of the inner chain body protrudes from the main body portion in the meshing direction. The outer sheet has two external through holes respectively communicating with the adjacent through holes and the internal through holes. The pivot can rotatably pass through the corresponding internal through hole and the corresponding through hole, and is finally fixed in the corresponding external through hole.

3. The silent chain according to claim 2, characterized in that: The inner sheet unit includes two inner sheets arranged at a distance from each other and two bushings. The bushings are respectively inserted through and protrude from the inner through holes of the inner sheets arranged at a distance from each other. The main body covers the pivot portion of the inner sheet and the outer periphery of the bushing. The pivot is rotatably inserted in the bushing.

4. The silent chain according to claim 2, characterized in that: The inner sheet unit includes two inner sheets arranged at relative intervals. Each inner sheet also has two annular flange portions that surround the inner through hole and protrude from the pivot portion toward the other inner sheet. The main body portion covers the pivot portion of the corresponding inner sheet and the outer periphery of the flange portion. The pivot can also be rotatably inserted through the flange portion.

5. The silent chain according to any one of claims 2 to 4, characterized in that: The inner sheet has a protrusion extending from the pivot portion toward the meshing direction, and the length of the protrusion extending in the meshing direction is not greater than the length of the meshing protrusion of the inner chain body extending in the meshing direction, and the meshing protrusion of the inner chain body covers the protrusion of the corresponding inner sheet.

6. The silent chain according to claim 2, characterized in that: The inner sheet has an outer side opposite to the meshing direction, and the main body of the inner chain covers the pivot portion of the inner sheet and is flush with the outer side.

7. The silent chain according to claim 2, characterized in that: The inner sheet also has an inner groove.

8. The silent chain according to claim 7, characterized in that: The inner chain body fills the inner hole groove.

9. The silent chain according to claim 7, characterized in that: The inner chain has an outer slot, which is connected to the inner slot.

10. The silent chain according to claim 9, characterized in that: The inner link also includes a columnar body passing through the interconnected inner and outer slots.

11. The silent chain according to claim 1, characterized in that: The inner chain body encapsulates and fixes the inner sheet unit inside by an encapsulation injection method.

12. The silent chain according to claim 1, characterized in that: The difference between the pitch of the inner link and the pitch of the outer link is greater than 0.3 mm, but less than the smaller of the two pitches.

13. A toothed disc, suitable for driving the silent chain of claim 1, the toothed disc comprising a ring body and a plurality of meshing teeth protruding from the outer periphery of the ring body at intervals around the axis of the ring body, characterized in that: The meshing teeth are used to engage with the meshing space of the outer links of the silent chain. Each meshing tooth has a tooth portion protruding radially outward from the ring body and a crown portion connected to the end of the tooth portion. The tooth portion has an inner surface and an outer surface opposite to the inner surface. The teeth portions of two adjacent meshing teeth cooperate to define a tooth base for the meshing protrusion of the silent chain to engage.

14. The toothed disc according to claim 13, characterized in that: The thickness of the crown portion is greater than the thickness of the tooth portion, and the crown portion extends and protrudes from the inner or outer side of the tooth portion in the width direction, or extends and protrudes symmetrically from the inner and outer sides of the tooth portion in the width direction.

15. The toothed disc according to claim 14, characterized in that: The thickness of the crown portion is not greater than the width of the inner link.

16. The toothed disc according to claim 13, characterized in that: The ring body has an inner side and an outer side opposite to the inner side, and has at least one drain groove that is recessed into the bottom of the tooth in a radially outwardly flared shape, the drain groove being recessed into the inner side or the outer side.

17. The toothed disc according to claim 13, characterized in that: The meshing teeth engage only with the outer chain segment.

Images