TWM449766U - Flywheel unit of flywheel apparatus - Google Patents

Description

Flywheel unit of flywheel unit

The present invention relates to a flywheel unit of a flywheel device, and more particularly to a flywheel unit mounted on a variable speed bicycle and adapted for a flywheel device with a chain engagement.

Referring to Figures 1, 2, and 3, the conventional flywheel device 1 is mounted on a rear axle of a bicycle not shown in the drawings and is drivable by a chain 2 to rotate in a rotational direction 20. The chain 2 comprises a plurality of pairs of inner and outer spaced apart front and rear chain plates 21, each chain plate 21 having two front and rear spaced arcuate ends 211 and a waist recess 212 connecting the arcuate ends 211.

The conventional flywheel device 1 includes a plurality of flywheels 10 having a diameter that tapers outwardly from a side adjacent to the body of the bicycle. Each of the flywheels 10 includes an outer side 11, an inner side 12, and a plurality of cards surrounding a center of rotation. a tooth 13 and a plurality of slot edges 16 spaced apart from each other on the outer side surface 11 and defining an upper chain avoidance slot 15 , each of the slot edges 16 covering two of the latching teeth 13 The upper chain avoiding groove 15 has a stepped concave edge 151 interposed between the teeth 13 and a rear concave portion 152 and a front concave portion 153 which are respectively located on opposite sides of the stepped concave edge 151 and have a height difference.

The number of the upper chain avoidance grooves 15 on the flywheel 10 of the conventional flywheel device 1 varies according to the diameter of the wheel body. Taking FIG. 2 as an example, the larger diameter of the flywheels 10 includes four upper chains. The groove 15 and the smaller diameter of the flywheel 10 include three upper chain avoidance grooves 15, and the number of the upper chain avoidance grooves 15 due to the equiangular arrangement may vary depending on the diameter of the flywheel 10, so The flying wheel 10 adjacent thereto can only form one upper chain area A. Here, the upper chain area A is the upper chain avoiding groove 15 on the flywheel 10 having a larger diameter based on one of the rotating directions 20 of the chain 2. Adjacent to the rear of the chain avoidance slot 15 of the flywheel 10 having a smaller diameter.

When the chain 2 is in normal operation, it is engaged on one of the flywheels 10 of the flywheel device 1, and when the chain 2 is to be wound, the chain 2 will be diagonally spanned in two phases. As shown in FIG. 1 , when the chain 2 is obliquely straddles the upper chain area A, the chain 20 can be circumvented by the upper diameter of the flywheel 10, so that the chain 2 is as far as possible. The larger diameter flywheel 10 is moved, and the chain 2 of the flywheel 10 having a smaller diameter is about to be moved to the larger diameter flywheel 10 by the upper chain avoiding groove 15 on the larger diameter flywheel 10. Finally, it is finally able to smoothly straddle the flywheel 10 having a larger diameter, that is, if the upper chain avoiding groove 15 on the larger diameter flywheel 10 is not immediately behind the chain avoiding groove 15 of the smaller diameter flywheel 10, Then the chain 2 is difficult to wind up smoothly.

Taking the flywheel 10 shown in FIG. 2 as an example, the conventional flywheel device 1 can improve the success rate of the upper chain by the upper chain avoidance groove 15 distributed on the flywheel 10, but the flywheel of the flywheel device 1 The number of the upper chain avoidance grooves 15 on the 10 may vary depending on the diameter of the wheel body, and when the number of the chain avoidance grooves 15 on the adjacent flywheels 10 is different, it is located on the adjacent flywheels 10 The upper chain avoidance groove 15 has only one set of correspondences, that is, only one upper chain area A is formed, so that the success rate of the chain 2 when it is wound on the conventional flywheel device 1 is not high.

In addition, the flywheel 10 above the flywheel device 1 of the conventional flywheel device 1 is in the chain The stepped recess 152 and the front recessed portion 153 have the stepped recessed edge 151, and the arc of the stepped recessed edge 151 is different from the arc of the arcuate end 211 of the link plate 21 of the chain 2, so that when the chain 2 is on the upper chain When leaning against one of the flywheels 10, the amount of side deflection is limited, which also reduces the chance of success of the chain 2 when it is wound.

The object of the present invention is to provide a flywheel unit of a flywheel device which can increase the amount of side eccentricity and the probability of winding up when the chain is wound.

The flywheel unit of the present invention can be used for straddle and shifting a chain, and comprises: a large flywheel, and a small flywheel having a diameter smaller than the large flywheel and located outside the large flywheel, the large flywheel and the small flywheel each include an outer side An inner side surface and a plurality of latches disposed at equal angles between the outer side surface and the inner side surface. The large flywheel further includes a plurality of first sluices disposed on the outer side surface, and the small flywheel further includes at least one second sluice provided on the outer side surface, at least one auxiliary groove disposed on the outer side surface, and An inner slit corresponding to the inner and outer sides of the auxiliary groove, wherein the auxiliary groove and the second avoiding groove respectively correspond to one of the first ones of the large flywheel, and form a plurality of numbers and the first Avoid the same upper chain area.

The utility model has the beneficial effects of: providing a first sluice on the large flywheel, and providing a second sluice and an auxiliary slot corresponding to the first sluice on the small flywheel, and simultaneously in the small flywheel The inner slit corresponding to the auxiliary groove is disposed on the side surface to increase the number of the upper chain region, so as to increase the amount of lateral deviation and the success probability of the chain when the chain is wound, and the design of the inner slit groove also improves the chain when the chain is broken. Smoothness.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 4, 5 and 6, a first preferred embodiment of the present flywheel unit 6 can be assembled coaxially with a plurality of sprockets 30 to form a flywheel device 3, each of which has a plurality of equal angles and surrounds A rotating center sprocket latch 301. The flywheel device 3 is mounted on a rear axle 41 of a bicycle 4, and a chain 5 is straddle and shifted. The chain 5 is driven by the bicycle 4 to rotate the flywheel device 3 in a rotational direction 31. The bicycle 4 also has a body 42 and a derailleur 43 mounted on the body 42 adjacent to the lower side. The chain 5 includes a plurality of pairs of inner and outer spaced apart link plates 51 connected in front and rear. Each of the link plates 51 has two arcuate end portions 511 spaced back and forth, and a waist portion 512 that is coupled between the arcuate end portions 511. In the following description, the inner side and the outer side are the body 42 with respect to the bicycle 4.

Referring to Figures 6, 7, and 8, the flywheel unit 6 of the present embodiment includes a large flywheel 61 located inside, and a small flywheel 62 having a smaller diameter than the large flywheel 61 and located outside. The large flywheel 61 includes a first outer side 611 facing the small flywheel 62, a first inner side 610 facing the body 42 (see FIG. 4), twenty-eight equal angles, and a circumference around the center of rotation. a latch 612, and four first avoidances disposed on the first outer side 611 at equal angles The slots 60, each of the first shrouds 60, span two of the first latches 612.

The first sleeving grooves 60 each have a circular arc rim 602 defining a rear recess 601, and an extended rim 604 defining a front recess 603, which is based on the rotational direction 31, and the front recess 603 and the The rear recess 601 respectively corresponds to one of the first latches 612, wherein the depth of the rear recess 601 is greater than the depth of the front recess 603, and the depth of the rear recess 601 is 0.6 mm, and the depth of the front recess 603 It is 0.4mm. The arc of the circular arc 602 cooperates with the arc of the chain plate 51 of the chain 5, and has a concave arc 605 with a curvature matching the waist 512 of the chain plate 51, and an arc of the chain plate 51. An arcuate projection 606 that engages the arcuate end 511.

The structure of the small flywheel 62 of the present embodiment is similar to that of the large flywheel 61, and includes a second outer side surface 621, a second inner side surface 620 facing the large flywheel 61, and twenty second second teeth surrounding the center of rotation. 622, and three second avoidance slots 60' disposed on the second outer side surface 621, the second avoidance slots 60' span both of the second latching teeth 622, and the structure and the same The structure of the first escaping 60 is completely the same and will not be described again. One of the second avoidance grooves 60' corresponds to one of the first avoidance grooves 60 of the large flywheel 61. Here, the front-back correspondence means that the first avoidance groove 60 is adjacent to the second escape groove 60' and located behind the second escape groove 60' with respect to the rotation direction 31.

The small flywheel 62 further includes three auxiliary slots 63 disposed on the second outer side surface 621, and a plurality of inscribed slots 64 disposed on the second inner side surface 620, one of the inner slots 64 And one of the auxiliary slots 63 Correspondingly, the other of the inscribed grooves 64 is adjacent to the other auxiliary groove 63, that is, the arcuate auxiliary groove 63 is adjacent to the rear of the inscribed groove 64 to improve the smoothness of the chain 5 when it is down. The auxiliary slots 63 of the embodiment respectively correspond to one of the second latching teeth 622 of the small flywheel 62 and respectively correspond to one of the first avoiding slots 60 of the large flywheel 61. Specifically, the number of the first avoidance slots 60 in the embodiment is four, and one of the first avoidance slots 60 and one of the second avoidance slots 60' of the small flywheel 62 are Correspondingly, the other three of the first avoidance grooves 60 respectively correspond to one of the auxiliary grooves 63 of the small flywheel 62, so the flywheel unit 60 of the embodiment has four suitable for the chain 5 to be carried on. The upper chain area A of the chain.

The inner slit 64 of the embodiment spans two of the second latching teeth 622 and has a deep and concave inscribed concave surface 641 corresponding to one of the inner and outer surfaces of the auxiliary slots 63. And the auxiliary groove 63 corresponding to the inscribed groove 64 has an auxiliary concave surface 631 which gradually becomes deeper from the front to the rear. In the design, the auxiliary groove 63 corresponding to the inner cutting groove 64 has a bevel depth of 0.4 to 0.6. Mm, the auxiliary groove 63 not corresponding to the inner slit 64 is a flat concave structure having a depth of 0.4 mm. That is, in order to balance the structural strength of each of the second latching teeth 622 of the small flywheel 62, the inscribed concave surface 641 of the inscribed groove 64 in this embodiment is a structure whose depth is deeper and deeper, and the corresponding auxiliary groove 63 is The auxiliary concave surface 631 is a structure in which the depth and the depth are uniform. Of course, the change in the depth may be reversed, or the inscribed concave surface 641 and the auxiliary concave surface 631 may be deep and shallow.

Referring to Figures 4, 6, and 9, when the chain 5 is spanned across the flywheel unit 6, When the second catch 622 of the flywheel 62 is on, the chain 5 will be rotated by the drive of the bicycle 4 along the rotational direction 31, and the flywheel unit 6 will be rotated. When the chain 5 is subjected to the derailleur 43 and the small flywheel 62 crosses the upper flywheel 61, the chain 5 straddles between the large flywheel 61 and the small flywheel 62. When the portion of the chain 5 obliquely straddles one of the upper chain regions A, one of the chain plates 51 of the chain 5 faces the second sluice 60' of the small flywheel 62 or assists The groove 63 leans against and leans against one of the first swashes 60 of the large flywheel 61, and finally climbs onto the large flywheel 61 to complete the winding action. That is, in the present embodiment, the upper chain area A of the flywheel unit 6 can be increased to four by the design of the auxiliary slots 63. Therefore, the embodiment can greatly improve the success probability of the chain 5 when it is wound up.

In addition, in the first and second sluices 60, 60' of the large flywheel 61 and the small flywheel 62 of the present embodiment, the recess 601 is defined by the circular rim 602 after the chain 5 abuts, and The arcs of the concave arc segments 605 and the arcuate projections 606 of the arc-shaped rim 602 are respectively engaged with the waist portions 512 and the arc-shaped end portions 511 of the chain plates 51. Therefore, when the chain 5 is in the upper chain, the chain 5 can be further abutted against the large flywheel 61 to further increase the lateral offset of the chain 5 and the success probability of the upper chain. The inner slit 64 provided in the embodiment does not affect the structural strength of the small flywheel 62, and thus the inner thickness of the corresponding second latch 622 can be reduced to improve the smoothness of the chain 5 when the chain is lowered. Therefore, the flywheel unit 6 of the present embodiment not only has a high success rate of winding, but also improves the smoothness of the chain 5 when it is down.

Referring to Figure 10, a second preferred embodiment of the flywheel unit 6 of the present invention The structure is similar to the first embodiment, but also includes a large flywheel 61, and a small flywheel 62 located outside the large flywheel 61. The structure of the large flywheel 61 and the small flywheel 62 is the same as that of the first embodiment, except that only The number of the first latching teeth 612, the second latching teeth 622, the first avoiding grooves 60, the second avoiding grooves 60', and the auxiliary grooves 63. That is, the large flywheel 61 of the embodiment includes eighteen first latching teeth 612 and three first avoiding slots 60, and the small flywheel 62 includes fifteen second latching teeth 622 and two second avoiding slots 60'. And two auxiliary slots 63, wherein the first avoidance slots 60 also respectively correspond to one of the second avoidance slots 60' and the auxiliary slots 63, so that the flywheel unit 6 of the embodiment has three equal angles. Set the upper chain area A.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent.

3‧‧‧Flywheel device

30‧‧‧Sprocket

301‧‧‧Sprocket

31‧‧‧Rotation direction

4‧‧‧Bicycle

41‧‧‧ Rear axle

42‧‧‧ body

43‧‧‧Dropper

5‧‧‧Chain

51‧‧‧Link plate

511‧‧‧Arc end

512‧‧‧ waist

6‧‧‧ flywheel unit

60‧‧‧first sluice

60’‧‧‧second sluice

601‧‧‧ rear recess

602‧‧‧Circular edge

603‧‧‧ front recess

604‧‧‧Extended rim

605‧‧‧ concave arc

606‧‧‧Arc-shaped segments

61‧‧‧ Big flywheel

610‧‧‧ first inner side

611‧‧‧ first outer side

612‧‧‧first card tooth

62‧‧‧Small flywheel

620‧‧‧Second inner side

621‧‧‧Second outer side

622‧‧‧second card teeth

63‧‧‧Auxiliary tank

631‧‧‧Auxiliary concave surface

64‧‧‧Inch slot

641‧‧‧Inscribed concave

A‧‧‧Wind area

1 is a schematic view of a conventional flywheel device illustrating the corresponding relationship between the flywheel device and a chain; FIG. 2 is an incomplete side view of one of the conventional flywheel devices, showing two flywheels of the flywheel device; Is a partial enlarged view of the conventional flywheel device; FIG. 4 is a reference view of the use state of the first preferred embodiment of the novel flywheel unit, illustrating the case where the flywheel unit is mounted on a bicycle; FIG. A side view state diagram of a first preferred embodiment, illustrating a case where the flywheel unit is combined with a plurality of sprockets to form a flywheel device; Figure 6 is a partially enlarged schematic view of the first preferred embodiment of the first preferred embodiment, illustrating a corresponding relationship between an upper chain region and a link plate of the flywheel unit; Figure 7 is a side view of the first preferred embodiment; Figure 8 1 is a cross-sectional view taken along line VIII-VIII of FIG. 7; FIG. 9 is a reference view of the state of use similar to FIG. 7, illustrating the corresponding relationship between the flywheel unit and a chain; and FIG. 10 is a flywheel unit of the present invention. A side view of a second preferred embodiment.

31‧‧‧Rotation direction

6‧‧‧ flywheel unit

60‧‧‧first sluice

60’‧‧‧second sluice

601‧‧‧ rear recess

602‧‧‧Circular edge

603‧‧‧ front recess

604‧‧‧Extended rim

61‧‧‧ Big flywheel

611‧‧‧ first outer side

612‧‧‧first card tooth

62‧‧‧Small flywheel

621‧‧‧Second outer side

622‧‧‧second card teeth

63‧‧‧Auxiliary tank

64‧‧‧Inch slot

A‧‧‧Wind area

Claims (11)

A flywheel unit of a flywheel device is provided for straddle and chaining a chain, the chain comprising a plurality of pairs of inner and outer spaced front and rear chain plates, and comprising: a large flywheel comprising a first outer side and a plurality of equal angles And a first latch for the chain to be engaged, and at least two first chutes disposed on the first outer side surface and spanning two of the first latches respectively; and a small flywheel having a diameter smaller than The large flywheel is located on the outer side of the large flywheel, and includes a second outer side surface, a second inner side surface facing the large flywheel, a plurality of second latches disposed at equal angles and for engaging the chain, at least two Provided on the second outer side surface and respectively spanning two of the second latching teeth, at least one of the second chutes disposed on the second outer side surface and corresponding to one of the second latching teeth a slot, and at least one inscribed slot disposed on the second inner side surface corresponding to the inner and outer sides of the auxiliary slot; one of the auxiliary slot and the second slot and the first of the large flywheel respectively Corresponding to the front and back of the slot, and together form several quantities and these For avoiding a groove on the same chain and chain region. The flywheel unit of the flywheel device of claim 1, wherein the large flywheel comprises four first slats arranged at equal angles, and the small flywheel comprises three second sluices arranged at equal angles, and Three auxiliary slots, one of the second avoidance slots and the auxiliary slots respectively correspond to the first avoidance slots of the large flywheel. The flywheel unit of the flywheel device according to claim 1, wherein the large flywheel comprises three first slats arranged at equal angles, and the The small flywheel includes two second avoidance grooves disposed at equal angles, and two auxiliary slots, one of the second avoidance slots and the auxiliary slots respectively corresponding to the first avoidance slots of the large flywheel. The flywheel unit of the flywheel device according to the second or third aspect of the invention, wherein the first sluice of the large flywheel is located on the small flywheel before and after the rotation direction The rear of the auxiliary slot and the second chute. The flywheel unit of the flywheel device of claim 1, wherein the inner groove of the small flywheel has an inscribed concave surface, and one of the auxiliary grooves corresponds to the inner slit and has an auxiliary Concave. The flywheel unit of the flywheel device of claim 5, wherein one of the inscribed concave surface and the auxiliary concave surface is a concave and convex concave structure, and the inscribed concave surface and the auxiliary concave surface are another It is a concave structure from shallow to deep. The flywheel unit of the flywheel device of claim 5, wherein the inscribed concave surface and the auxiliary concave surface are both concave and convex concave structures. The flywheel unit of the flywheel device of claim 1, wherein each of the chain plates has two arc ends, and a waist portion that is coupled between the arcuate ends, wherein The first sluice of the large flywheel and the second sluice of the small flywheel have a circular arc edge defining a rear recess, each arc rim having a curvature corresponding to the waist of the chain of the chain The concave arc segment and a circular arc segment corresponding to the arc end of the chain plate of the chain. The flywheel unit of the flywheel device of claim 8, wherein the first sluice of the large flywheel and the second sluice of the small flywheel further have an extended rim defining a front recess, The front recess is connected to the rear recess. The flywheel unit of the flywheel device of claim 9, wherein a depth of the first sluice of the large flywheel and a rear recess of the second sluice of the small flywheel is greater than a depth of the front recess. The flywheel unit of the flywheel device of claim 2, wherein the small flywheel includes two inscribed slots, and one of the auxiliary slots is immediately adjacent one of the inscribed slots.