TWI759957B - Combination of chainring and crank assembly - Google Patents

Abstract

The combination of chainring and crank assembly is used to drive a transmission bar, which includes: a chainring system for linking the transmission bar; a crank assembly installed on one side of the chainring for transmitting a Drive torque to the gear plate; at least two adjustment components are installed between one side of the gear plate and the crank assembly, and each of the adjustment components can be elastically deformed; wherein, the rotation process of the gear plate is driven by each of the adjustment components The elastic deformation is used to make the gear plate float automatically, thereby adjusting the relative angle of the gear plate and the transmission bar.

Description

Combination of chainring and crank assembly

The invention relates to the technical field of bicycle transmission structure, and particularly refers to the combination of a chainring and a crank assembly that can guide the position of the transmission bar on the large plate and the flywheel, and keep the chain line parallel to the center line of the bicycle.

In the transmission mode of the bicycle, a transmission strip is connected between the large plate and the flywheel, and the transmission strip is divided into two types: chain and belt; when the user steps on a pedal with both feet, and drives the large plate to rotate through a crank, then The power is transmitted to a rear flywheel through the transmission bar (chain or belt), and the flywheel drives a rear wheel to drive the body forward. However, through the configuration of various gear ratios of one or more large discs and flywheels, it is possible to generate The multi-stage shifting and the ability to climb hills with less effort allow the rider to ride more smoothly when facing different terrains; however, in the transmission and shifting system of the aforementioned bicycle, changing the ratio of the large plate and the flywheel will change the transmission. The position of the bar and the chain line often encounter a large plate with a certain number of teeth in combination with the flywheel. When riding, the transmission bar will make an unpleasant sound. The key is the chain line "CHAIN LINE".

Please refer to pictures 1 and 2, the chain line 10 refers to the straight line between the chain and the flywheel, this chain line 10 should be parallel to the centerline 20 of the frame, however, when the drive bar selects and changes the large plate When the sprocket is linked with the flywheel, the chain line 10 will be offset (to the left or right) without being aligned with the center of the frame. When the center line 20 is parallel, the transmission bar will collide with the flywheel or the flywheel, which will not only make a rattling sound, but also affect the life of the flywheel, chain or flywheel.

Patent No. TWI677363 discloses a floating transmission system, which includes a floating large plate and a floating flywheel, the floating large plate has a plurality of large plate axle centers, and a plurality of large plate bushings are arranged on the inner side of the toothed plate, and the large plate axle sleeves are sleeved Outside the axle center of the large plate, when a chain is displaced on the floating flywheel, the floating large plate oscillates on the axle centers of the large plates that are sleeved, so as to maintain the linear displacement of the chain.

The present invention provides a combination of a chainring and a crank assembly, the purpose of which is to provide a system that can guide or adjust the relative angle of the transmission bar and the chainring, improve the alignment of the transmission bar and the chainring, and thus provide a better transmission effect. .

In order to achieve the aforementioned purpose, the present invention provides a combination of a chainring and a crank assembly for driving a transmission bar, which includes: a chainring, which is used to link the transmission bar; a crank assembly, which is installed on the chainring One side of the chainring is used to transmit a driving torque to the chainring; at least two adjusting assemblies are installed between one side of the chainring and the crank assembly, and each adjusting assembly can be elastically deformed; wherein, the chainring rotates During the process, the elastic deformation of each adjustment component is used to make the toothed plate float automatically, thereby adjusting the relative angle of the toothed plate and the transmission bar.

In one embodiment, a combination of a chainring and a crank assembly is used to connect a transmission bar, and the other end of the transmission bar is connected to a flywheel; the combination of the chainring and the crank assembly includes: a toothed plate with a circular peripheral edge, the outer side of the circular peripheral edge has a plurality of engaging parts for engaging the transmission bar, a joint surface is adjacent to the circular peripheral edge, and a plurality of matching holes are arranged on the joint surface; at least Two adjustment components, each of which is correspondingly disposed on one side of the matching hole, each of the adjustment components includes a set of contact pieces and a movable piece, one side of the set of contact pieces is in contact with the joint surface, and the set of contact pieces is on the joint surface. A pivot hole is provided, and the movable piece is a conical body, which inclines and shrinks from the top surface to the bottom surface to form an inclined edge portion on the outer periphery of the movable piece. The pivot hole corresponds to the pivot hole of the set of connecting pieces and communicates with the matching hole, the inclined edge of the movable piece is adjacent to the set of connecting pieces and can be in contact with the set of connecting pieces A crank assembly has a handle body, one end of the handle body is connected with a claw piece, and a plurality of locking holes are arranged on the claw piece, and the locking holes correspond to the movable piece and the assembly. The pivot hole of the plate and the matching hole of the toothed plate are used for a pivoting component to pass through the pivot; wherein, when the crank drives the toothed plate to rotate, the at least two adjustment components can be used to guide or adjust Adjust the relative angle of the drive bar and the chainring.

In one embodiment, the set of connecting pieces has a plurality of insert parts which are arranged at the periphery of the pivot hole at equal intervals, and each of the insert parts communicates with the pivot hole; the movable piece has a plurality of pivot pins that are equally spaced. Set at the periphery of the pivot hole, each pivot pin protrudes from the outside of the pivot hole, the plurality of pivot pins of the movable piece are correspondingly embedded in the plurality of embedded portions of the set of pieces, the set of joints The plate and the movable plate can be subjected to force to produce relative displacement.

In one embodiment, there are at least two second adjustment components correspondingly disposed on the other side of the matching hole, each second adjustment component includes a second set of connecting pieces and a second movable piece, the second set of One side of the connecting piece is in contact with the joint surface, the second group of connecting pieces is provided with a pivot hole, the second movable piece is a conical piece, which is inclined and retracted from the top surface to the bottom surface, and is located at the outer periphery of the connecting piece. formed with an inclined side portion, the The second movable piece is provided with a pivot hole, the pivot hole of the second set of pieces corresponds to the pivot hole of the second movable piece and communicates with the matching hole, and the inclined edge of the second movable piece is adjacent to the pivot hole. The second group of contact pieces can be in contact therewith, and the second movable piece and the second group of contact pieces can be subjected to force to produce relative deformation.

Hereinafter, according to the purpose and effect of the present invention, preferred embodiments are given and described in detail with the accompanying drawings.

100: Combination of chainring and crank assembly

40: chainring

41: Round perimeter

42: Engagement part

43: Combined surface

44: Mating hole

50: Adjust components

51: Assembly piece

52: Pivot hole

53: Inlay

54: Activity Film

55: Sloped edge

56: Pivot hole

57: Pivot pin

60: Crank assembly

61: handle body

62: Claw pieces

63: Lock with hole

64: Pedal

70: Second adjustment component

71: The second group of tabs

72: Pivot hole

73: Inlay

74: Second Activity Piece

75: Sloped edge

76: Pivot hole

77:Pivot pin

80: Pivot components

81: Bolts

82: Nut

200: Transmission bar

300: Flywheel

10, 10': chain line

20: Centerline

Figures 1 and 2 are schematic diagrams of the chain lines of the conventional large plate and flywheel in different gearing states.

Fig. 3 is a three-dimensional exploded appearance schematic view of the combination of the chainring and the crank assembly of the present invention.

FIG. 4 is a schematic view of the plane assembly and partial cross-sectional view of FIG. 3 .

FIG. 5 is an enlarged schematic view of the sectional part in FIG. 4 .

FIG. 6 is a schematic diagram of the yaw motion of the combination of the chainring and the crank assembly of the present invention.

FIG. 7 is a schematic view of the adjustable chain line of the combination of the chainring and the crank assembly of the present invention.

FIG. 8 is a schematic diagram of the displacement action of the combination of the chainring and the crank assembly of the present invention.

Please refer to FIGS. 3 to 7, a combination 100 of a chainring and a crank assembly of the present invention is used to connect a transmission bar 200, and the other end of the transmission bar 200 is connected to a flywheel 300; the combination of the chainring and the crank assembly of the present invention 100 includes: a chainring 40, at least two adjusting components 50 and a crank assembly 60, wherein: the chainring 40 has a circular peripheral edge 41, and the outer side of the circular peripheral edge 41 has a plurality of engaging parts 42 for engaging the transmission bar 200, a joint surface 43 is adjacent to the circular peripheral edge 41, and a plurality of matching holes 44 are formed on the joint surface 43; in this embodiment, the toothed disc 40 is a pulley, and the transmission bar 200 is a The belt, the plurality of meshing parts 42 are a plurality of pulley teeth, and are arranged on the outer peripheral part of the pulley; of course, The chainring 40 can also be a sprocket, and the plurality of meshing portions 42 are set as a plurality of sprocket teeth, which are conventional and not the main feature of the present invention, and will not be described here and will not be shown in the drawings. formula representation.

In the present embodiment, four adjustment components 50 are disposed corresponding to the four matching holes 44 , and each adjustment component 50 includes a set of connecting pieces 51 and a movable piece 54 , and one side of the set of connecting pieces 51 is connected to the joint surface. 43 contact, the set of connecting pieces 51 is provided with a pivot hole 52 and a plurality of embedded parts 53, the movable piece 54 is a conical piece, which is inclined and retracted from the top surface to the bottom surface, and forms a slope on its outer periphery. On the side 55, the movable piece 54 is provided with a pivot hole 56 and a plurality of pivot pins 57, the pivot hole 52 of the movable piece 54 corresponds to the pivot hole 52 of the assembly piece 51 and communicates with the matching hole 44. The plurality of pivot pins 57 of the movable piece 54 are embedded in the plurality of embedded portions 53 of the set of connecting pieces 51, and the movable piece 54 is assembled with the set of connecting pieces 51 (as shown in the fourth section). 57 The depth of the embedded portion 53 can be adjusted. The inclined edge portion 55 of the movable piece 54 is adjacent to the set of connecting pieces 51 and must be in contact with the set of connecting pieces 51. The set of connecting pieces 51 and the movable piece 54 can bear force Relative deformation and displacement are generated.

The plurality of inserts 53 of the set of connecting pieces 51 are disposed at the periphery of the pivot hole 52 at equal intervals, and each insert 53 communicates with the pivot hole 52 ; the plurality of pivot pins 57 of the movable piece 54 are The pivot pins 57 are arranged at equal intervals on the periphery of the pivot hole 52 , and each pivot pin 57 protrudes from the outside of the pivot hole 52 , and two sides of each pivot pin 57 are respectively provided with a slit to facilitate the Since the movable piece 54 and the set of connecting pieces 51 can be relatively close to or away from each other, in the embodiment of this specification, the set of connecting pieces 51 is provided with three embedded portions 53 , and the movable piece 54 is correspondingly provided with three pivot pins 57 .

Please refer to FIGS. 3 and 4 , this embodiment further includes at least two second adjustment components 70 correspondingly disposed on the other side of the matching hole 44 , and the structure of the second adjustment components 70 is the same as that of the aforementioned adjustment components 50 . , each system includes a second set of connecting pieces 71 and a second movable piece 74, one side of the second set of connecting pieces 71 is in contact with the other side of the joint surface 43, and a pivot is provided on the second set of connecting pieces 71 The connecting hole 72 and the three-insert portion 73, the outer periphery of the second movable piece 74 is formed with an inclined edge portion 55, and the second movable piece 74 is provided with a pivot hole 76 and three The pivot pin 77 has a slit on both sides of the pivot pin 77 . The pivot hole 76 of the second movable piece 74 corresponds to the pivot hole 72 of the second set of connecting pieces 71 and communicates with the fitting. In the connecting hole 44 , the pivot pin 77 of the second movable piece 74 is correspondingly embedded in the embedded portion 73 of the second set of connecting pieces 71 , the inclined edge 75 of the second movable piece 74 and the second set of connecting pieces 71 . The contact pieces 71 are in contact, the second movable piece 74 is assembled with the second set of contact pieces 71 , and the second movable piece 74 and the second set of contact pieces 71 can be subjected to force to produce relative deformation and displacement.

The crank assembly 60 has a handle body 61. One end of the handle body 61 is connected to a claw piece 62. The claw piece 62 is provided with a plurality of locking holes 63. The figure shows that the number of the locking holes 63 is four. The aforementioned gear plate 40 correspondingly has four matching holes 44 , so as to correspondingly have four adjusting components 50 and four second adjusting components 70 ; the locking hole 63 can be matched with the movable piece 54 of the adjusting component 50 and the set of connecting pieces The pivot holes 52 and 56 of 51 , the matching hole 44 of the chainring 40 , the second set of connecting pieces 71 of the second adjustment component 70 , the pivot holes 72 of the second movable piece 74 , 76 corresponds to, and is matched with a pivot assembly 80 to pass through the pivot, the crank assembly 60 is pivotally connected to the chainring 40, the adjusting assembly 50 and the second adjusting assembly 70 are installed and assembled on the chainring 40 and the crank assembly. 60; in this embodiment, the pivot component 80 is a bolt 81 and a nut 82, of course, the pivot component can also be a rivet (not shown); the other end of the handle body 61 is assembled A pedal 64, when the pedal 64 is pressed to exert force on the crank assembly 60, the chainring 40 and the transmission bar 200 can be rotated, and the rotating transmission bar 200 drives the flywheel 300, so that the rear wheel of the bicycle (Fig. (not shown) rotates and then drives the vehicle body forward.

As shown in FIG. 5, the adjusting assembly 50 is in the state before it is not actuated, there is an appropriate distance between the movable piece 54 and the set of connecting pieces 51, and the inclined edge 55 has not yet contacted the set of connecting pieces 51, The state of the inclined edge portion 55 being close to or away from the set of connecting pieces 51 can be adjusted, and the depth of the pivoting foot 57 of the movable piece 54 into the embedded portion 53 of the set of connecting pieces 51 can be adjusted. When the pedal 64 exerts force, the movable piece 54 and the set of connecting pieces 51 can be forced to produce relative displacement, that is, the pivot pin 57 of the movable piece 54 can move inward Deeply inserting or withdrawing from the embedded portion 53 of the set of connecting pieces 51 can also be achieved by tightening or loosening the bolt 81 and the nut 82 .

Similarly, the second adjustment component 70 can be elastically deformed, and the pivot pin 77 of the second movable piece 74 of the second adjustment component 70 can be deeply inserted inward or withdrawn from the second set of connecting pieces 71 The insert 73 , the second movable piece 74 and the second set of connecting pieces 71 are disposed on the other side of the matching hole 44 so that the relative displacement can be generated by force, and the inclined edge of the second movable piece 74 75 must be close to or away from the second group of connecting pieces 71, and the second movable piece 74 and the second group of connecting pieces 71 can be subjected to force to produce relative deformation.

As shown in FIGS. 6 and 7 , according to the combination 100 of the chainring and crank assembly of the present invention, the adjusting element 50 and the second adjusting element 70 can be elastically deformed, so as to make the chainring 40 automatically float. This achieves automatic adjustment of the relative angle between the chainring 40 and the drive bar 200; when the drive bar 200 changes position, especially when the drive bar 200 moves from the small plate to the large plate of the flywheel 300, the chain line of the drive bar 200 The inclination angle of 10 becomes larger, when the rider steps on the pedal 64 with his feet and provides the pedaling torque, the inclined edges 55 and 75 of the movable piece 54 and the second movable piece 74 must be close to or away from the pedal. The set of contact pieces 51 and the second set of contact pieces 71 enable the set of contact pieces 51 and the movable piece 54 , the second set of contact pieces 71 and the second movable piece 74 to be relatively deformed by force to achieve the tooth The disk 40 has the effect of floating, and the amount of deformation between the set of connecting pieces 51 and the movable piece 54 can be adjusted and changed due to the different degrees of the set of connecting pieces 51 and the movable piece 54 being close to or away from each other. The amount of deformation between the contact piece 71 and the second movable piece 74 can be adjusted and changed due to the different degrees of the second set of contact pieces 71 and the second movable piece 74 being close to or away from each other, as shown in FIG. 6 . The set of connecting pieces 51 and the inclined edge 55 of the movable piece 54 are pressed against each other, the set of connecting pieces 51 and the movable piece 54 have a large amount of deformation, the second set of connecting pieces 71 and the second The movable piece 74 is in the away state, and the deformation of the second set of connecting pieces 71 and the second movable piece 74 is small. The member 70 can be elastically deformed to achieve a floating deflection effect, so that the chain line 10 can be deflected to 10' in a fine-tuned manner, so as to be closer to the center line 20 of the bicycle.

As shown in FIG. 8 , the adjustment component 50 and the second adjustment component 70 can be relatively displaced by force, and the pivot pin 57 of the movable piece 54 penetrates deep into the embedded portion 53 of the set of connecting pieces 51 , and the movable piece 54 moves closer to the set of connecting pieces 51 , the second set of connecting pieces 71 moves closer to the second movable piece 74 , and the pivot pin 77 of the second movable piece 74 is deep into the second set of connecting pieces 71 . The inset portion 73, the toothed plate 40 is displaced relative to the adjusting element 50 and the second adjusting element 70 to achieve a floating displacement effect.

Then, the combination 100 of the chainring and crank assembly of the present invention can be elastically deformed by at least two adjusting elements 50 and at least two second adjusting elements 70, and can adjust the relative angle of the chainring 40 and the transmission bar 200. When the rider steps on the pedal 64 to provide pedaling torque, the chainring 40 automatically floats, which can guide the position of the drive bar 200 between the chainring 40 and the flywheel 300, and improve the distance between the drive bar 200 and the chainring 40. Therefore, the interference between the drive bar 200 and the gear plate 40 and the flywheel 300 can be reduced, and the drive bar 200 can be prevented from colliding with the flywheel 300 or the gear plate 40 to generate rattling sound, thereby providing a better transmission effect.

The above-mentioned embodiments are only used to illustrate the technology of the present invention and its effects, but are not intended to limit the present invention. Anyone skilled in the art can modify and change the above embodiments without violating the technical principle and spirit of the present invention. Therefore, the scope of protection of the present invention should be listed in the scope of the patent application described later. .

100: Combination of chainring and crank assembly

40: chainring

41: Round perimeter

42: Engagement part

43: Combined surface

44: Mating hole

50: Adjust components

51: Assembly piece

52: Pivot hole

53: Inlay

54: Activity Film

56: Pivot hole

57: Pivot pin

60: Crank

61: handle body

62: Arm

63: Lock with hole

64: Pedal

70: Second adjustment component

71: The second group of tabs

72: Pivot hole

73: Inlay

74: Second Activity Piece

76: Pivot hole

77:Pivot pin

80: Pivot components

81: Bolts

82: Nut

200: Transmission bar

Claims (9)

A combination of a chainring and a crank assembly is used to connect a transmission bar, and the other end of the transmission bar is connected to a flywheel; the combination of the chainring and the crank assembly comprises: a chainring with a circular peripheral edge, the circular peripheral edge The outer side has a plurality of engaging parts for engaging the transmission bar, a joint surface is adjacent to the circular periphery, and a plurality of matching holes are arranged on the joint surface; at least two adjustment components, each of which is correspondingly arranged on the matching surface. On one side of the connecting hole, each adjustment component includes a set of connecting pieces and a movable piece, one side of the connecting piece is in contact with the joint surface, the connecting piece is provided with a pivot hole, and the movable piece is a cone shape The plate body is inclined and retracted from the top surface to the bottom surface to form an inclined edge on its outer periphery. The movable plate is provided with a pivot hole, and the pivot hole of the movable plate and the pivot hole of the group of plates are formed. Corresponding to and communicating with the matching hole, the inclined edge of the movable piece is adjacent to the set of connecting pieces and can be in contact with it, the set of connecting pieces and the movable piece can be subjected to force to produce relative deformation; a crank assembly has a handle One end of the handle body is connected with a claw piece, and a plurality of locking holes are arranged on the claw piece, and the locking holes correspond to the pivot hole of the movable piece and the set of connecting pieces, and the matching connection of the toothed plate a hole for a pivoting component to pass through the pivot; wherein, when the crank drives the chainring to rotate, the at least two adjusting components can guide or adjust the relative angle of the transmission bar and the chainring. The combination of a chainring and a crank assembly as claimed in claim 1, wherein the set of connecting pieces has a plurality of inserts that are arranged at the periphery of the pivot hole at equal intervals, and each insert communicates with the pivot hole; the The movable piece has a plurality of pivot pins which are arranged at the periphery of the pivot hole at equal intervals, each of the pivot pins protrudes from the outside of the pivot hole, and the plurality of pivot pins of the movable piece are correspondingly embedded in the set of pivot pins. The plurality of embedded parts of the contact pieces, the group of contact pieces and the movable piece can be subjected to force to generate relative displacement. The combination of a chainring and a crank assembly as claimed in claim 1, wherein at least two second adjustment elements are correspondingly disposed on the other side of the matching hole, and each second adjustment element includes a second set of The connecting piece and a second movable piece, one side of the second group of connecting pieces is in contact with the joint surface, the second group of connecting pieces is provided with a pivot hole, the second movable piece is a conical piece, and is formed by The top surface is inclined and inwardly retracted toward the bottom surface, and an inclined edge is formed on the outer periphery of the second movable piece. A pivot hole is formed on the second movable piece. The connecting hole is connected to the matching hole, the inclined edge of the second movable piece is adjacent to the second set of connecting pieces and can be in contact with it, the second set of connecting pieces and the second movable piece can be subjected to force to produce relative deformation . The combination of the chainring and the crank assembly as claimed in claim 3, wherein the second set of connecting pieces has a plurality of inserts that are arranged at the periphery of the pivot hole at equal intervals, and each insert communicates with the pivot hole ; The second movable piece has a plurality of pivoting feet that are arranged at the periphery of the pivoting hole at equal intervals, and each of the pivoting feet protrudes from the outside of the pivoting hole, and the plurality of pivots of the second movable piece are The pins are correspondingly embedded in the plurality of embedded parts of the second group of contact pieces, and the second group of contact pieces and the second movable piece can be subjected to force to generate relative displacement. A combination of a chainring and a crank assembly is used to drive a transmission bar, which comprises: a chainring, which is used to link the transmission bar; a crank assembly, which is installed on one side of the chainring to transmit a drive torque to the chainring; at least two adjusting components are installed between one side of the chainring and the crank assembly, each of the adjusting components includes a set of connecting pieces opposite a movable piece, and the set of connecting pieces and the movable piece Can be subjected to force to produce relative deformation; wherein, during the rotation process of the toothed plate, the toothed plate can be automatically floated by the elastic deformation of the adjustment components, thereby adjusting the relative angle of the toothed plate and the transmission bar. A combination of a chainring and a crank assembly is used to drive a transmission bar, which comprises: a chainring, which is used to link the transmission bar; a crank assembly, which is installed on one side of the chainring to transmit a drive torque to the chainring; at least two adjusting components are installed between one side of the chainring and the crank assembly, each of the adjusting components includes a set of connecting pieces opposite a movable piece, and the set of connecting pieces and the movable piece Ability to generate relative displacement under force; Wherein, during the rotation process of the toothed plate, the elastic deformation of each adjustment component is used to make the toothed plate float automatically, thereby adjusting the relative angle of the toothed plate and the transmission bar. The combination of a chainring and a crank assembly as claimed in claim 5 or 6, wherein one end of the crank assembly is a handle body connected to a claw piece, the claw piece is installed on one side of the chainring, and each adjustment assembly is sandwiched between the claw piece and one side surface of the toothed disc. The combination of a chainring and a crank assembly as claimed in claim 1, 5 or 6, wherein the chainring is a sprocket, the plurality of meshing portions are a plurality of sprocket teeth disposed on the outer peripheral portion of the chain wheel, and the The drive train is a chain. The combination of a chainring and a crank assembly as claimed in claim 1, 5 or 6, wherein the chainring is a pulley, the plurality of meshing portions are a plurality of pulley teeth disposed on the outer peripheral portion of the pulley, and the drive bar is a for a belt.

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