Transmission mechanism and mute chain thereof

Abstract

A transmission mechanism and a mute chain thereof are provided, the transmission mechanism includes a mute chain and a fluted disc, the mute chain includes a plurality of inner links, a plurality of outer links arranged outside the inner links in a staggered manner, and a plurality of pivots connecting the outer links and the inner links in series. Each inner chain link comprises an inner chain body made of a non-metal material and an inner piece unit arranged on the outer side of the inner chain body, and 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 protrusions. 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] The utility model relates to a power transmission component, in particular to a transmission mechanism using a chain. BACKGROUND

[0002] In the power transmission technology of motor system, it can be roughly divided into belt transmission and chain transmission. Among them, the belt transmission has the advantages of low vibration noise and simple maintenance, and the advantages of chain transmission are high rigidity, convenient assembly, and can be assembled in a joint mode without damaging the frame. Therefore, if the belt transmission technology can be integrated into the chain, another new transmission component with high transmission performance can be created. In addition, because the existing chain needs to be alternately engaged with the tooth disc by matching the inner and outer links, the inner and outer links can only be designed with the same pitch, so the specification design of the chain plate lacks flexibility. SUMMARY

[0003] The utility model aims at providing a mute chain which has the advantages of belt transmission and chain transmission.

[0004] The mute chain comprises a plurality of inner links arranged in a transmission direction, a plurality of outer links arranged in the transmission direction, and a plurality of pivots connecting the outer links and the inner links. Each pivot allows the corresponding inner link and the outer link to rotate relative to each other.

[0005] At least one inner link comprises an inner link body made of non-metal material, and an inner plate unit arranged outside the inner link body. The inner link body has an engagement protrusion protruding towards the engagement direction. The outer link is arranged outside the inner link in a staggered manner. The outer link comprises two outer plates arranged opposite to each other and arranged outside the adjacent inner link. The outer link and the adjacent inner link define an engagement space.

[0006] The mute chain further comprises a main body portion and two perforations located in the main body portion. The engagement protrusion of the inner link body protrudes from the main body portion towards the engagement direction. The inner plate unit comprises at least one inner plate arranged outside the inner link body. The inner plate has a pivot portion and two inner through holes arranged in the pivot portion and respectively communicating with the perforations. The outer plate has two outer through holes respectively communicating with the adjacent perforations and inner through holes. The pivot rotatably passes through the corresponding inner through hole and the corresponding perforation, and is finally fixed in the corresponding outer through hole.

[0007] The utility model discloses a mute chain, the inner sheet unit includes two opposite interval setting inner sheet, and two bushings, the inner sheet has the pivot joint department, and two interval setting inner through -hole of the pivot joint department, the inner chain body is located the interval of the inner sheet, and the inner chain body has two respectively with the through -hole communication perforation of the inner through -hole, the bushing respectively penetrates the through -hole, and is fixed respectively in the inner through -hole of the inner sheet, the pivot can rotatablely be arranged in the bushing.

[0008] The utility model discloses a mute chain, the inner sheet unit includes two opposite interval setting inner sheet, and two bushings, the inner sheet has the pivot joint department, and two interval setting inner through -hole of the pivot joint department, the inner chain body is located the interval of the inner sheet, and the inner chain body has two respectively with the through -hole communication perforation of the inner through -hole, the bushing respectively penetrates the through -hole, and is fixed respectively in the inner through -hole of the inner sheet, the pivot can rotatablely be arranged in the bushing.

[0009] The utility model discloses a mute chain, the inner sheet has the protruding of the pivot joint department towards the engagement direction, and the length that the protruding of the pivot joint department is protruding in the engagement direction is greater than the length that the engagement protruding of the inner chain body is protruding in the engagement direction.

[0010] The utility model discloses a mute chain, and the inner sheet still has the inner hole groove.

[0011] The utility model discloses a mute chain, and the inner chain body has the outer hole groove, and the outer hole groove is communicated with the inner hole groove.

[0012] The utility model discloses a mute chain, and the inner chain body has the outer hole groove, and the outer hole groove is communicated with the inner hole groove.

[0013] The utility model discloses a mute chain, and the inner chain body has the outer hole groove, and the outer hole groove is communicated with the inner hole groove.

[0014] The utility model discloses a mute chain, and the inner chain body has the outer hole groove, and the outer hole groove is communicated with the inner hole groove.

[0015] The utility model discloses transmission mechanism contains preceding mute chain, and gear disc. The mute chain includes a plurality of inner links, a plurality of outer links and a plurality of pivot shafts, the inner link is arranged along the transmission direction, at least one the inner link includes the inner chain body of nonmetal material, and the inner sheet unit is set at the outer side of the inner chain body, the inner chain body has the engagement protruding towards the engagement direction, the outer link is arranged at the outer side of the inner link and is staggered, the outer link includes two opposite settings, and the outer sheet is arranged at the outer side of adjacent the inner link respectively, and the outer link and adjacent the inner link cooperate and define the engagement space, the pivot shaft is connected the outer link with the inner link, so that every the inner link can rotate relative to the outer link. The gear disc includes ring body and a plurality of engagement teeth arranged at the outer edge of the ring body and protruding in the interval. The engagement tooth is used for engaging the engagement space of the outer link of the mute chain. The engagement tooth has the tooth portion that protrudes radially from the ring body outward, and the tooth crown portion is connected at the end of the tooth portion. The tooth portion has the inner side of tooth portion, and the outer side of tooth portion opposite the inner side of tooth portion. The tooth portion of adjacent two engagement teeth cooperates and defines the tooth bottom for the engagement of the engagement protruding of the mute chain.

[0016] The utility model discloses transmission mechanism, the thickness of the tooth crown portion is greater than the thickness of the tooth portion, and the tooth crown portion expands and protrudes from the inner side of tooth portion or the outer side of tooth portion of the tooth portion in the width direction, or expands and protrudes from the inner side of tooth portion and the outer side of tooth portion of the tooth portion in the width direction.

[0017] The utility model discloses transmission mechanism, the thickness of the tooth crown portion is not greater than the width of the inner link.

[0018] The utility model discloses transmission mechanism, the ring body has the inner side, and the outer side opposite the inner side, and has at least one blowdown groove that is recessed to the tooth bottom in the radial direction outwardly, and the blowdown groove is recessed in the inner side or the outer side.

[0019] The utility model discloses transmission mechanism, the engagement tooth only engages with the outer link.

[0020] The utility model discloses transmission mechanism, the engagement tooth only engages with the outer link. DRAWINGS

[0021] The utility model discloses transmission mechanism, the engagement tooth only engages with the outer link.

[0022] Figure 1This is a perspective view illustrating the structure of a silent chain and a toothed disc in a first embodiment of the transmission mechanism of this utility model. Only a partial section of the silent chain is shown in the figure.

[0023] Figure 2 It is an incomplete side view, illustration Figure 1 The structure of the silent chain and the toothed disc;

[0024] Figure 3 It is a longitudinal sectional view illustrating the structure of this embodiment of the toothed disk;

[0025] Figure 4 It is an exploded three-dimensional view illustrating the structure of the silent chain in the first embodiment;

[0026] Figure 5 It is a perspective view illustrating the structure of an inner link of the silent chain in the first embodiment;

[0027] Figure 6 This is an exploded perspective view illustrating the structure of an inner sheet unit of the silent chain in the first embodiment;

[0028] Figure 7 It is a side view illustrating the structure of the inner link of the silent chain in the first embodiment;

[0029] Figure 8 yes Figure 7 Sectional view along section line AA;

[0030] Figure 9 This is a perspective view illustrating the inner link structure of the silent chain in a second embodiment of the transmission mechanism of this utility model;

[0031] Figure 10 It is an exploded perspective view illustrating the structure of the inner sheet unit of the silent chain in the second embodiment;

[0032] Figure 11 This is a perspective view illustrating the inner link structure of the silent chain in a third embodiment of the transmission mechanism of this utility model;

[0033] Figure 12 It is a side view illustrating the inner link structure of the silent chain in the third embodiment;

[0034] Figure 13 yes Figure 12 Sectional view along section line BB;

[0035] Figure 14 This is an exploded perspective view illustrating the inner plate unit structure of the silent chain in a fourth embodiment of the transmission mechanism of this utility model.

[0036] Figure 15 is a side view illustrating the structure of the inner link of the silent chain of the fourth embodiment;

[0037] Figure 16 is Figure 15 a sectional view along the C-C section line;

[0038] Figure 17 is a perspective exploded view illustrating the inner sheet unit structure of the silent chain of a fifth embodiment of the transmission mechanism of the present application;

[0039] Figure 18 is a side view illustrating the structure of the inner link of the silent chain of the fifth embodiment;

[0040] Figure 19 is Figure 18 a sectional view along the D-D section line;

[0041] Figure 20 is a perspective view illustrating the inner link structure of the silent chain of a sixth embodiment of the transmission mechanism of the present application;

[0042] Figure 21 is a perspective exploded view illustrating the structure of the inner link of the silent chain of the sixth embodiment;

[0043] Figure 22 is an incomplete side view illustrating the use of the silent chain of the sixth embodiment with the toothed disc;

[0044] Figure 23 is Figure 22 a sectional view along the E-E section line;

[0045] Figure 24 is a perspective view illustrating another embodiment of the inner link of the sixth embodiment;

[0046] Figure 25 is a perspective view illustrating still another embodiment of the inner link of the sixth embodiment;

[0047] Figure 26 is a perspective view illustrating the inner link structure of the silent chain of a seventh embodiment of the transmission mechanism of the present application;

[0048] Figure 27 is a side view illustrating the structure of the inner link of the silent chain of the seventh embodiment;

[0049] Figure 28 is Figure 27 a sectional view along the F-F section line;

[0050] Figure 29 Fig. 8 is a perspective view illustrating the inner link structure of the silent chain of a ninth embodiment of the transmission mechanism of the present application;

[0051] Figure 30 Fig. 9 is a side view illustrating the inner link structure of the silent chain of the eighth embodiment;

[0052] Figure 31 Fig. 10 is a sectional view along the G-G sectional line; Figure 30 Fig. 11 is a sectional view along the G-G sectional line;

[0053] Figure 32 Fig. 12 is a perspective exploded view illustrating the inner link structure of the silent chain of a ninth embodiment of the transmission mechanism of the present application;

[0054] Figure 33 Fig. 13 is a perspective view illustrating the inner link structure of the silent chain of the ninth embodiment;

[0055] Figure 34 Fig. 14 is a sectional view illustrating the inner link structure of the silent chain of the ninth embodiment. DETAILED DESCRIPTION

[0056] Before the present application is described in detail, it is to be noted that like components are denoted by like numerals throughout the description.

[0057] Referring to Figure 1 , Figure 2 , Figure 3 , a first embodiment of the transmission mechanism 200 of the present application comprises a toothed disc 3 and a silent chain 4 engaged with each other to transmit power.

[0058] The toothed disc 3 comprises a ring body 31 in the shape of a ring, and a plurality of engagement teeth 32 protruding around the outer periphery of the ring body 31. 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 dirt discharge grooves 33 concavely arranged around the axis of the ring body 31.

[0059] Each of the engagement teeth 32 has a tooth portion 321 protruding radially outward from the ring body 31, and a tooth crown portion 324 connected to the protruding end of the tooth portion 321. The tooth portion 321 has a tooth portion inner side surface 323 and a tooth portion outer side surface 322 opposite to each other in the width direction W. The tooth portions 321 of two adjacent engagement teeth 32 cooperatively define a tooth bottom 30 for engagement of the silent chain 4. The dirt discharge grooves 33 are located near the tooth bottom 30, and gradually concave outward in the form of an outwardly extending flange to the corresponding tooth bottom 30 in the form of an inclined groove edge.

[0060] The tooth crown 324 is extended and protruded from the tooth inner side surface 323 and the tooth outer side surface 322 of the tooth portion 321 to the width direction W, so the thickness of the tooth crown 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 the present application, the tooth crown 324 can be extended and protruded from only one of the tooth inner side surface 323 and the tooth outer side surface 322 of the tooth portion 321 to the outside.

[0061] Referring to Figure 1 , Figure 4 The silent chain 4 comprises a plurality of inner links 5 arranged in a transmission direction D, a plurality of outer links 6 arranged in the transmission direction D and staggered outside the inner links 5, and a plurality of pivots 7 connecting the inner links 5 and the outer links 6. The thickness D1 of the tooth crown 324 is not greater than the width D2 of the inner link 5. The pitch D3 of the inner link 5 and the pitch D4 of the outer link 6 can be different. The difference between the pitch of the inner link 5 and the pitch of the outer link 6 is greater than 0.3mm, but less than the minimum of the two pitches.

[0062] It should be noted that the silent chain 4 is in a ring shape, and the drawings only show a partial section of the silent chain 4 for convenience of description. The following will be described by taking one of the inner links 5 and one of the outer links 6 as an example.

[0063] Referring to Figures 4-8 The inner link 5 comprises an inner plate unit 51 and an inner link body 52 made of non-metallic material covering the outer side of the inner plate unit 51. The non-metallic material may, for example, but is not limited to, rubber material or other plastic material.

[0064] The inner plate unit 51 comprises two oppositely arranged inner plates 511 and two bushings 516. Each of the inner plates 511 has a pivot connecting portion 512 and a protruding portion 514 protruding from the pivot connecting portion 512 towards the meshing direction of the tooth plate 3. Each of the pivot connecting portions 512 has two spaced inner through holes 513, and the bushings 516 are fixedly arranged in the inner through holes 513 and protrude out of the inner plates 511, and each of the protruding portions 514 has an inner hole 515.

[0065] The inner link body 52 covers and is fixed to the outer side of the inner plates 511, has a main body portion 521 covering the outer side of the pivot connecting portions 512 of the inner plates 511 and the outer periphery of the bushings 516, and a meshing protruding portion 522 protruding from the main body portion 521 towards the meshing direction and covering the outer side of the protruding portions 514 and filling the inner holes 515. The main body portion 521 has two through holes 523 in communication with the inner through holes 513, so that the bushings 516 are arranged to protrude outwards.

[0066] The outer link 6 comprises two spaced-apart outer plates 61, which are respectively misaligned with the outer sides of the two inner links 52. The outer plates 61 of the outer link 6 and the inner link 5 cooperatively define a meshing space 60, which is open toward the meshing direction. Each of the outer plates 61 has two outer through holes 610, which are respectively communicated with the through holes 523 of the adjacent inner link 5.

[0067] Referring to Figure 1 , Figure 4 , the pivot 7 is rotatably penetrated through the bushing 516 and then fixed in the outer through hole 610 of the outer plate 61, thereby connecting the inner link 5 and the outer link 6 together.

[0068] Referring to Figure 2 , Figure 4 , Figure 5 When the silent chain 4 of the transmission mechanism 200 of the first embodiment is used with the toothed disc 3, the silent chain 4 is engaged with the meshing teeth 32 of the toothed disc 3 in the meshing space 60 of the outer link 6, and the toothed disc 3 is engaged with the silent chain 4 in the meshing direction by the meshing protrusions 522 of the inner link 5. At this time, the tooth crown 324 of the meshing teeth 32 is limited between the corresponding outer plates 61, thereby avoiding the lateral disengagement of the silent chain 4 and making the silent chain 4 more stable during the meshing transmission with the toothed disc 3.

[0069] When the toothed disc 3 is driven to rotate, the meshing teeth 32 engaged in the meshing space 60 respectively push the meshing protrusions 522 of the corresponding inner links 52 in the transmission direction D, thereby driving the silent chain 4 to rotate.

[0070] Since the inner links 52 of the inner link 5 are designed by using non-metallic materials, the sound generated when the inner links 52 are engaged with the toothed disc 3 is greatly reduced. Therefore, the silent chain has the advantages of high rigidity and easy assembly of the existing chain, and further has the silent transmission advantage of the belt transmission. In addition, according to the structural design of the inner link 5 and the outer link 6, the pitch of the inner link 5 and the pitch of the outer link 6 are not necessarily similar, that is, the pitch of the inner link 5 and the pitch of the outer link 6 can be designed to be different according to the use requirements.

[0071] Furthermore, the structure of the dirt groove 33 of the tooth disc 3 is designed such that dirt adhered to the tooth disc 3 when the tooth disc 3 engages with the silent chain 4 can slide along the inclined groove edge of the dirt groove 33 to the inside in the radial direction to be discharged, so that the accumulation of dirt on the tooth disc 3 can be greatly reduced, and the dirt groove 33 is designed in an open manner, so that it is also very convenient to clean.

[0072] Referring to Figure 9 、 Figure 10 , a second embodiment of the transmission mechanism 200 of the utility model differs from the first embodiment in that the structure of the inner link 5 of the silent chain 4 is designed.

[0073] In the second embodiment, the inner sheet 511 of the inner sheet unit 51 only has the pivot joint 512, that is, the convex part is not arranged. The inner chain body 52 is covered on the outer periphery of the inner sheet 511 and the bushing 516.

[0074] The mounting and connecting mode of the inner link 5, the outer link 6 and the pivot 7 of the second embodiment is the same as that of the first embodiment, and the mode when the second embodiment is used with the tooth disc 3 is also the same as that of the first embodiment, so the details are not described again.

[0075] Referring to Figures 11-13 , a third embodiment of the transmission mechanism 200 of the utility model differs from the first embodiment in that the structure of the inner link 5 of the silent chain 4 is designed.

[0076] In the third embodiment, the pivot joint 512 of the inner sheet 511 has an outer side edge 510 opposite to the engagement direction. The main body part 521 of the inner chain body 52 covered outside the pivot joint 512 is flush with the outer side edge 510, so that the outer side edge 510 of the inner sheet 511 is exposed.

[0077] Referring to Figures 14-16 , a fourth embodiment of the transmission mechanism 200 of the utility model differs from the first embodiment in that the structure of the inner link 5 of the silent chain 4 is designed.

[0078] In the fourth embodiment, the engagement convex part 522 of the inner chain body 52 is provided with an outer hole groove 524 communicating with the inner hole groove 515 of the inner sheet 511. The inner link 5 further includes a columnar body 53 fixedly penetrating the inner hole groove 515 and the outer hole groove 524. By means of the design, the structural strength of the inner link 5 can be improved.

[0079] Referring to Figures 17-19The difference between the fifth embodiment of the transmission mechanism 200 and the first embodiment is that the structure of the inner link 5 of the mute chain 4 is different.

[0080] In the fifth embodiment, the inner sheet unit 51 of the inner link 5 is not provided with the bushing. The inner sheet 511 further has two flange portions 517 protruding from the pivot portion 512 towards another inner sheet 511 and surrounding the inner through hole 513. The inner sheet 511 abuts against the flange portions 517. The main body portion 521 of the inner link body 52 is covered outside the pivot portion 512 of the inner sheet 511 and the outer periphery of the flange portion 517.

[0081] The pivot (not shown) is rotatably arranged in the corresponding inner through hole 513 and the flange portion 517, and the two ends of the pivot are respectively arranged and fixed in the outer through hole (not shown) of the corresponding outer sheet (not shown).

[0082] Referring to Figures 20-23 The difference between the sixth embodiment of the transmission mechanism 200 and the first embodiment is that the structure of the inner link 5 of the mute chain 4 is different.

[0083] In the sixth embodiment, the inner link body 52 is located between the inner sheets 511 of the inner sheet unit 51, and the protruding length of the convex portion 514 of the inner sheet 511 in the meshing direction is greater than the protruding length of the meshing convex portion 522 of the inner link body 52 in the meshing direction. The convex portion 514 of the inner sheet 511 protrudes beyond the tooth bottom 30 in the meshing direction and is located on the outer side surface 311 and the inner side surface 312 of the tooth disc 3, respectively. The thickness D1 of the tooth crown portion 324 is not greater than the width D2 of the inner link 5.

[0084] The inner through hole 513 of the inner sheet 511 is respectively communicated with the through hole 523 of the inner link body 52. The bushing 516 of the inner sheet unit 51 is arranged in the through hole 523 and fixed in the corresponding communicated inner through hole 513.

[0085] The outer sheet 61 of the outer link 6 is respectively corresponding to the outer side of the inner sheet 511 of the inner link 5 and is respectively connected to the inner link 5 through the pivot 7 arranged in the bushing 516.

[0086] With the design, when the mute chain 4 of the sixth embodiment is used with the toothed disc 3, the engaging convex part 522 of the inner chain body 52 of the inner link 5 will engage with the tooth bottom 30 of the toothed disc 3, so as to achieve engaging transmission. In addition, because the convex part 514 of the inner sheet 511 is located on both sides of the toothed disc 3, the mute chain 4 can be limited on the toothed disc 3, which helps to keep the mute chain 4 and the toothed disc 3 in good engaging transmission performance.

[0087] Referring to Figure 24 , in another embodiment of the utility model, the protruding length of the convex part 514 of the inner sheet 511 in the engaging direction is designed to be not greater than the protruding length of the engaging convex part 522 of the inner chain body 52 in the engaging direction.

[0088] Referring to Figure 25 , in another embodiment of the utility model, the inner sheet 511 can also be designed to only have the pivot part 512, that is, the inner sheet 511 is not provided with the convex part 514. In this way, the weight of the inner link 5 can be reduced.

[0089] Referring to Figures 26-28 , the seventh embodiment of the transmission mechanism 200 of the utility model differs from the first embodiment in the structural design of the inner link 5 of the mute chain 4.

[0090] In the seventh embodiment, the inner link 5 includes an inner sheet unit 51 and an inner chain body 52 covering the outer side of the inner sheet unit 51. The inner sheet unit 51 only includes an 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 of the first embodiment. The inner chain body 52 covers the outer side of the inner sheet 511 and fills the inner hole 515 of the inner sheet 511.

[0091] The pivot (not shown in the figure) is rotatably arranged in the inner through hole 513 of the corresponding inner sheet 511 and the through hole 523 of the inner chain body 52, and is fixedly arranged in the corresponding outer sheet (not shown in the figure).

[0092] Referring to Figures 29-31 , the eighth embodiment of the transmission mechanism 200 of the utility model differs from the seventh embodiment in the structural design of the inner link 5 of the mute chain 4.

[0093] In the eighth embodiment, the inner sheet unit 51 further includes two bushings 516 fixedly arranged in the inner through hole 513 of the inner sheet 511 and the through hole 523 of the inner chain body 52, respectively. The pivot (not shown in the figure) is rotatably arranged in the bushing 516 of the corresponding inner sheet unit 51.

[0094] Referring to Figures 32-34 The difference between the ninth embodiment of the transmission mechanism 200 and the fifth embodiment is that the structure of the inner link 5 of the silent chain 4 is different.

[0095] In the ninth embodiment, the inner link body 52 is located between the inner plates 511 of the inner plate unit 51, and the flange portions 517 of the inner plates 511 are embedded in the perforations 523 of the inner link body 52. The pivot (not shown in the figure) is rotatably arranged in the corresponding inner through holes 513, flange portions 517, and perforations 523.

[0096] In summary, through the structure design of the silent chain 4, in addition to the high strength characteristics of the existing chain and the low vibration and noise characteristics of the transmission belt, it is not necessary to design the pitch of the inner link 5 and the pitch of the outer link 6 to be similar. According to the use requirements, the pitch of the inner link 5 and the pitch of the outer link 6 can be designed to be different sizes with a pitch, so as to adapt to various vehicle models and chain length requirements.

[0097] In addition, the outer link 6 cooperates with the inner link 5 to define the meshing space 60, and the outer plate 61 defining the meshing space 60 is limited to the structure design of the tooth portion outer side surface 322 and the tooth portion inner side surface 323 of the meshing tooth 32. It has the functions of guiding and preventing chain falling. Through the structure design of the meshing convex portion 522 of the inner link body 52 and the structure design of the tooth crown portion 324 of the meshing tooth 32 of the tooth disc 3, the contact area between the inner link 5 and the meshing tooth 32 is increased, and the kinetic energy transmission efficiency is increased. The structure design of the tooth crown portion 324 of the meshing tooth 32 extending outward in the width direction W can greatly improve the structural strength, rigidity, and wear resistance of the entire tooth disc 3, and can withstand higher torque. The tooth disc 3 is simple in structure and easy to manufacture and maintain.

[0098] Therefore, the silent chain 4 and the tooth disc 3 of the transmission mechanism 200 are indeed quite innovative and convenient to use, and can indeed achieve the purpose of the present application.

[0099] The above is only an embodiment of the present application, and cannot limit the scope of the present application. Any simple equivalent changes and modifications made in accordance with the claims and description of the present application are still within the scope of the present application.

Claims

1. A silent chain comprising a plurality of inner links arranged in a direction of transmission, a plurality of outer links arranged in the direction of transmission at intervals, and a plurality of pivots connecting the outer links and the inner links, each pivot allowing the corresponding outer link and the inner link to rotate relative to each other, characterized in that: At least one of the inner links includes an inner link body of non-metal material, and an inner plate unit disposed outside the inner link body, the inner link body having an engaging protrusion protruding toward an engaging direction, the outer links being misaligned and disposed outside the inner links, the outer links including two oppositely disposed outer plates respectively disposed outside adjacent inner links, and the outer links and the adjacent inner links cooperatively defining an engaging space. ​ 2. The silent chain of claim 1, wherein: The inner link body further includes a main body portion, and two through holes disposed in the main body portion, the engaging protrusion of the inner link body protruding from the main body portion toward the engaging direction, the inner plate unit including at least one inner plate disposed outside the inner link body, the inner plate having a pivot portion, and two inner through holes spaced apart from each other in the pivot portion and respectively communicating with the through holes, the outer plate having two outer through holes respectively communicating with the adjacent through holes and the inner through holes, the pivot shaft rotatably penetrating the corresponding inner through hole and the corresponding through hole, and finally fixed in the corresponding outer through hole.

3. The silent chain of claim 1, wherein: The inner plate unit includes two oppositely spaced inner plates, and two bushings, the inner plate having a pivot portion, and two inner through holes spaced apart from each other in the pivot portion, the inner link body being located between the inner plates, and the inner link body having two through holes respectively communicating with the inner through holes, the bushings respectively penetrating the through holes, and respectively penetrating and fixed in the inner through holes of the inner plates, and the pivot shaft rotatably penetrating in the bushings.

4. The silent chain of claim 2, wherein: The inner plate unit includes two oppositely spaced inner plates, and two bushings, the inner plate having a pivot portion, and two inner through holes spaced apart from each other in the pivot portion, the inner link body being located between the inner plates, and the inner link body having two through holes respectively communicating with the inner through holes, the bushings respectively penetrating the through holes, and respectively penetrating and fixed in the inner through holes of the inner plates, and the pivot shaft rotatably penetrating in the bushings.

5. The silent chain according to claim 2, 3 or 4, characterized in that: The inner plate has a protrusion protruding from the pivot portion toward the engaging direction, the length of the protrusion protruding in the engaging direction being greater than the length of the engaging protrusion of the inner link body protruding in the engaging direction.

6. The silent chain of claim 2, wherein: The inner plate further includes an inner hole groove.

7. The silent chain of claim 6, wherein: The inner link body has an outer hole groove, the outer hole groove communicating with the inner hole groove.

8. The silent chain of claim 7, wherein: The inner link further includes a columnar body penetrating in the communicating inner hole groove and outer hole groove.

9. The silent chain of claim 1, wherein: The difference between the pitch of the inner link and the pitch of the outer link is greater than 0.3mm, but less than the minimum of the two pitches.

10. A transmission mechanism characterised in that: The transmission mechanism comprises a silent chain and a toothed disc. The silent chain comprises a plurality of inner links, a plurality of outer links and a plurality of pivots. The inner links are arranged along a transmission direction. At least one of the inner links comprises an inner link body made of non-metallic material and an inner sheet unit arranged outside the inner link body. The inner link body has a meshing protrusion protruding towards a meshing direction. The outer links are arranged outside the inner links in a staggered manner. The outer links comprise two outer sheets arranged oppositely and arranged outside the adjacent inner links, respectively. The outer links and the adjacent inner links cooperatively define a meshing space. The pivots are connected to the outer links and the inner links, so that each inner link can rotate relative to the outer links. The toothed disc comprises a ring body and a plurality of meshing teeth protruding from the outer periphery of the ring body along the axial direction of the ring body. The meshing teeth are used to mesh with the meshing space of the outer links of the silent chain. The meshing teeth have a tooth portion protruding radially outward from the ring body and a tooth crown connected to the end of the tooth portion. The tooth portion has a tooth inner side and a tooth outer side opposite to the tooth inner side. Two adjacent meshing teeth cooperatively define a tooth bottom for the meshing protrusion of the silent chain.

11. The transmission mechanism of claim 10, wherein: The thickness of the tooth crown is greater than the thickness of the tooth portion. The tooth crown extends and protrudes in the width direction from the tooth inner side or the tooth outer side of the tooth portion, or symmetrically extends and protrudes in the width direction from the tooth inner side and the tooth outer side of the tooth portion.

12. The transmission mechanism of claim 11, wherein: The thickness of the tooth crown is not greater than the width of the inner link.

13. The transmission mechanism of claim 10, wherein: The ring body has an inner side and an outer side opposite to the inner side. At least one dirt groove recessed to the tooth bottom in a flared manner extends radially outward. The dirt groove is recessed in the inner side or the outer side.

14. The transmission mechanism of claim 10, wherein: The meshing teeth only mesh with the outer links.

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