TWI677452B - Freewheel structure for bicycles - Google Patents

Abstract

The utility model relates to a bicycle flywheel structure. A base ring gear and a plurality of ring gears are installed in the axial direction of a first-stage mounting seat. A plurality of spacer rings are installed in the axial direction of the mounting seat and are respectively located on the base ring gear and adjacent to the base ring gear. Between the ring gears and adjacent two ring gears. The base ring gear, the ring gear and the spacer ring are independent elements and can be installed in the axial direction of the mounting seat one by one. The invention has the advantages of simple and convenient assembly. In addition, the spacer ring is used to press against the base ring gear and the ring gear and also to combine the ring gear. Therefore, the flywheel set provided by the present invention has a stable combination effect.

Description

Bicycle flywheel structure

The invention relates to the technical field of a bicycle, and particularly to a bicycle flywheel group structure.

A flywheel assembly of a bicycle includes a plurality of ring gear discs or ring gear combinations and is mounted on a tower base at one end of a rear hub. When the flywheel group rotates in the forward direction of the bicycle, the tower base and the hub wheel rotate.

US patents US20180281898A1 and US20180283520A1 both disclose that a plurality of toothed rings of a flywheel group are mounted on a claw-shaped fixing seat. The surface of each claw portion of the claw-shaped fixing seat has a plurality of caulking grooves, and the inner wall surface of the central ring hole of each tooth ring has a plurality of convex portions. A tooth ring is mounted on the fixing seat, and each of the tooth rings The convex part is respectively inserted into each of the inserting grooves at the equal height positions of the claw parts to form positioning. The adjacent two toothed rings are combined with the unequal height caulks, so the adjacent two toothed rings form a separated state.

The convex part of the aforementioned two patent cases is inserted into the recessed groove from the radial direction of the claw part of the fixing base, so it is inconvenient to install. In addition, each of the claws extends radially outward from a central axis tube, so the claws are separated by a distance, and each of the claws has a plurality of cavities, so the structural strength of the claw-shaped fixing seat is poor.

The object of the present invention is to provide a bicycle flywheel structure, which has the effect of enabling a plurality of toothed rings to be easily and quickly mounted on a mounting seat.

The object of the present invention is to provide a bicycle flywheel structure, which can make the combination of each of the ring gear and the mounting seat have better structural strength effect.

In order to achieve the above-mentioned object and effect, the present invention discloses a flywheel assembly structure including a mounting seat, a first-class seat body and a shaft tube, wherein the shaft tube is disposed in the axially inner portion of the class seat body; the class seat One end of the body includes a base block with a maximum outer diameter extending from a base plate, and an end block with a minimum outer diameter at the other end. The base block and the end block correspond to the two axial ends of the shaft tube. A plurality of class blocks are stacked between the base block and the end block. The base block, the end block, and each of the class blocks have a cylindrical shape, and the outer diameters of the class blocks are different and face each other. The end seat block becomes smaller successively; a plurality of positioning grooves are formed in the base block; a plurality of snap grooves are formed in each of the class blocks and the end seat block; a base ring gear has a through hole in the center And a plurality of fitting projections are formed on the inner wall surface of the through hole, the base ring gear is sleeved on the mounting seat, the fitting projections are embedded in the positioning grooves of the base block; a plurality of ring gear assemblies are used Socketed to each of the block and the end block, each ring gear assembly includes a ring gear A spacer ring, wherein the ring gear has a ring gear through hole, a plurality of ring gear stoppers are formed on the inner wall surface of the ring gear through hole, the spacer ring has a spacer ring through hole, and a plurality of spacer ring lock blocks are formed on On the inner wall surface of the spacer ring through-hole, one of the ring gear components is sleeved on the adjacent block of the base block, the spacer ring is placed on the base ring gear, and the tooth ring rests on the spacer ring; The other ring gear components are respectively sleeved on the respective block and the end seat block, and the spacer ring is located between the two ring gears; a lock cover is locked on one end of the shaft tube to restrict each of the teeth The ring assembly and the base ring gear are separated from the mounting seat.

In the following, according to the purpose and effect of the present invention, preferred embodiments are given, and the components of the present invention and the combination relationship between the components are explained with reference to the drawings.

10‧‧‧ Taki

12‧‧‧ wheel shell

20‧‧‧Flywheel

30‧‧‧Mount

32‧‧‧Class seat

320‧‧‧ base block

322‧‧‧base plate

324‧‧‧End Block

326‧‧‧Class Block

328‧‧‧Positioning bump

330‧‧‧ positioning groove

332‧‧‧Snap slot

334‧‧‧Snap slot

336‧‧‧Snap slot

338‧‧‧Snap slot

340‧‧‧ Positioning groove abutment block

342‧‧‧Slot stopper block

36‧‧‧ shaft tube

362‧‧‧ Recessed

40‧‧‧ base ring gear

42‧‧‧ Positioning hole

44‧‧‧through hole

46‧‧‧Mesh

50‧‧‧ Gear ring assembly

52‧‧‧Gear ring

520‧‧‧tooth ring through hole

522‧‧‧Gear Ring Block

524‧‧‧Gear ring positioning hole

54‧‧‧ spacer ring

540‧‧‧ spacer ring through hole

542‧‧‧ spacer ring stopper

544‧‧‧ Torus bump

60‧‧‧Lock cover

70‧‧‧Extended ring gear assembly

72‧‧‧Extended ring gear

720‧‧‧Extended ring gear through hole

722‧‧‧Extended ring gear stopper

74‧‧‧Extended spacer ring

740‧‧‧Extended spacer ring through hole

742‧‧‧Extended spacer ring stopper

Figure 1 is a schematic diagram of the combination of the present invention and a wheel hub.

Fig. 2 is an external view of a mounting base of the present invention.

Fig. 3 is an exploded plan view of the ring gear assembly of the present invention.

FIG. 4 is an exploded view of the ring gear assembly of the present invention.

Fig. 5 is a schematic diagram of a combination of a base ring gear and a mounting seat according to the present invention.

Fig. 6 is a partial combination diagram of the base ring gear and the mounting seat of the present invention.

FIG. 7 is a first schematic view of a combination of a mounting seat and a ring gear assembly of the present invention.

FIG. 8 is a second schematic view of the combination of the mounting seat and the ring gear assembly of the present invention.

FIG. 9 is the third assembly schematic diagram of the mounting seat and the ring gear assembly of the present invention.

Fig. 10 is an exploded view of the mounting seat, the ring gear assembly and the extended ring gear assembly of the present invention.

FIG. 11 is a combined schematic diagram of the mounting seat, the ring gear assembly and the extended ring gear assembly of the present invention. .

Please refer to FIG. 1, which shows a ratchet cylinder (tower base) 10 located at one end of a hub 12 and a flywheel group 20 combined with the ratchet cylinder 10. The flywheel set 20 is driven by a transmission element (not shown). For example, if the flywheel set 20 is driven by a chain, the ratchet cylinder 10 and the hub 12 can rotate. The flywheel group 20 is a combination of a mounting seat 30 and a base ring gear 40 and a plurality of ring gear assemblies 50.

Referring to FIG. 2, the mounting base 30 includes a first-level base body 32 and a shaft tube 36. The shaft tube 36 is disposed in the axially inner portion of the stage base body 32; one end of the stage base body 32 includes a base block 320 having a maximum outer diameter extending from one side of a base plate 322, and the other end has The minimum outer diameter of one end block 324. The base block 320 and the end seat block 324 correspond to two axial ends of the shaft tube 36. Plural class block The 326 series is stacked between the base block 320 and the end seat block 324. The base block 320, the end seat block 324, and each of the stage blocks 326 are cylindrical, and the outer diameter of each of the stage blocks 326 is between the outer diameter of the base block 320 and the outer diameter of the end seat block 324. And the outer diameter of each of the step blocks 326 gradually decreases toward the end seat block 324.

A plurality of positioning protrusions 328 are formed convexly on the surface of the base plate 322; a plurality of positioning grooves 330 are formed on the base block 320; one end of the positioning groove 330 is open and is located outside the base block 320; The other end is closed and corresponds to the radial direction of the base block 320. Each of the positioning grooves 330 has a penetrating shape corresponding to the axial direction (thickness) of the base block 320.

A plurality of the latching slots 332 and 334 are provided on the periphery of each of the step blocks 326. The latching groove 332 corresponds to the axial direction of the step block 326, and the latching groove 334 corresponds to the axial direction of the step block 326. The periphery of the end seat block 324 has a plurality of latching grooves 336 and 338. The latching groove 336 corresponds to the axial direction of the end seat block 324, and the latching groove 338 corresponds to the axial direction of the end seat block 324.

This embodiment includes at least one positioning groove abutment block 340 and a plurality of latching groove abutment blocks 342. For example, a part of the positioning groove 330 is provided with the positioning groove stop block 340, and the positioning groove abutting block 340 is installed on one side of the positioning groove 330. Each of the step blocks 326 has at least one latching slot abutting block 342 mounted on one side of the latching slot 332 or 334. Furthermore, the latching slot abutment block 342 can be installed on one side of the latching slot 336 or 338. As shown in the figure, the latching groove abutment block 342 is preferably installed on one side of the latching grooves 334 and 338 with a through structure, but is not limited thereto.

Referring to FIG. 3, the base ring gear 40 and the plurality of ring gear assemblies 50 disclosed in the present invention are arranged from large to small according to an outer diameter. The base ring gear assembly 50 includes a ring gear 52 and a spacer ring 54.

Referring to FIG. 4, the ring surface of the base ring 40 has a plurality of positioning holes 42, a through hole 44 at the center, and a plurality of fitting projections 46 formed on the inner wall surface of the through hole 44.

The ring gear 52 of the ring gear assembly 50 has a ring gear through hole 520, a plurality of ring gear stoppers 522 are formed on the inner wall surface of the ring gear through hole 520, and a plurality of ring gear positioning holes 524 are formed in the ring gear 52. Torus. The spacer ring 54 has a spacer ring through hole 540, a plurality of spacer ring stopper blocks 542 are formed on the inner wall surface of the spacer ring through hole 540, and a plurality of toroidal projections 544 are formed convexly on the annular surface of the spacer ring 54. .

Referring to FIGS. 5 and 6, the base ring gear 40 is sleeved on the mounting base 30. The positioning hole 42 of the base ring gear 40 is combined with the positioning projection 328 on the surface of the base plate 322; the fitting projection 46 of the base ring gear 40 is inserted into the positioning groove 330 of the base block 320. It is worth noting that the positioning groove abutment block 340 is capable of contacting the fitting projection 46 of the base ring gear 40.

Referring to FIG. 7, the ring gear assembly 50 is mounted on the mounting base 30. More specifically, the ring gear assembly 50 is sleeved on each of the step blocks 326 and the end seat blocks 324. The spacer ring 54 of the ring gear assembly 50 is used to be sleeved on the adjacent stepped block 326 of the base block 320. Referring to FIG. 8, the spacer ring retaining block 542 of the spacer ring 54 is inserted into the retaining groove 332 with a through structure, so that the spacer ring 54 can rest on the base ring gear 40.

Please refer to FIGS. 7 and 9. Following the foregoing combination, the ring gear 52 is sleeved on the step block 326 of the adjacent base block 320, and the ring gear catch block 522 of the ring gear 52 is embedded. The engaging slot 334 without a through structure and the engaging slot 332 with a through structure. It is worth noting that the latch groove abutment block 342 contacts the ring gear latch block 522 of the ring gear 52. The annular projection 544 of the spacer ring 54 is inserted into the ring positioning hole 524 of the ring 52. In this way, each of the ring gear assemblies 50 is sleeved on each of the step block 326 and the end seat block 324, and the spacer ring 54 is located between the two ring gears 52.

Therefore, as shown in FIGS. 7, 8 and 9, the ring gear 52 rests on the spacer ring 54, and the spacer ring 54 is located between the ring gear 52 and the base ring gear 40. A further lock cover 60 (see FIG. 7) is locked to one end of the shaft tube 34 to restrict each of the ring gear assembly 50 and the base ring gear 40 from disengaging from the mounting seat 30.

Please refer to FIGS. 10 and 11. In this embodiment, one end of the shaft tube 36 can pass through the end seat block 324, and an outer surface of the shaft tube 36 has a plurality of embedded grooves 362 in the axial direction. At least one extended ring gear assembly 70 is used to be mounted on the periphery of the shaft tube 36.

The extended ring gear assembly 70 includes an extended ring gear 72 and an extended spacer ring 74, wherein the extended spacer ring 74 has an extended spacer ring through hole 740, and a plurality of extended spacer ring latch blocks 742 are formed in the extended spacer ring through hole. 740 has an inner wall surface; the center of the extension ring gear 72 has an extension ring gear through hole 720, and a plurality of extension ring gear stoppers 722 are formed on the inner wall surface of the extension ring gear through hole 720.

The extended ring gear 72 and the extended spacer ring 74 are overlapped, and the extended spacer ring stopper block 742 and the extended ring gear stopper block 722 are overlapped to fit into the recessed groove 362 on the surface of the shaft tube 36. The lock cover 60 is locked to one end of the shaft tube 34 to restrict the extended ring gear assembly 70, each of the ring gear assembly 50 and the base ring gear 40 from being disengaged from the mounting seat 30.

The base ring gear 40, the ring gear 52 and the spacer ring 54 of this embodiment are independent components and can be installed in the axial direction of the mounting seat 30 one by one, so they have the advantages of simple assembly.

The base ring gear 40, the ring gear 52, and the spacer ring 54 of this example all fit into the mounting seat 30, and the spacer ring 54 is used to press against the base ring gear 40 and the ring gear 52. It is also used to combine the ring gear 52, so the combination of the base ring gear 40 and the ring gear assembly 50 has a stable combination effect.

The hardness or abrasion resistance of the positioning groove abutment block 340 and the latching groove abutment block 342 of this example is higher than the hardness or abrasion resistance of the mounting seat 30, so the fitting protrusion of the base ring gear 40 The block 46 contacts the positioning groove abutting block 340, and the ring gear stopper block 5222 of the ring gear 52 contacts the latching groove stopper block 342, which can reduce the wear rate of the mounting seat 30.

The shaft tube 36 of this embodiment protrudes from one end of the mounting seat 30, and at least one of the extended ring gear groups 70 can be installed on the axial periphery of the shaft tube 36, so not only can the total number of installation of the ring gear be increased, And the outer diameter of the ring gear can be smaller.

The above-mentioned embodiments are merely for illustrative purposes to illustrate the technology of the present invention and its effects, and are not intended to limit the present invention. Anyone skilled in the art can modify and change the above embodiments without violating the technical principles and spirit of the present invention. Therefore, the scope of protection of the rights of the present invention should be listed in the scope of patent application described below. .

Claims (8)

A bicycle flywheel structure includes: a mounting seat, which includes a first-class seat body and an axle tube, wherein the axle tube is arranged axially inside the first-class seat body; and one end of the first-class seat body includes a A pedestal block extends from a pedestal plate, and one end pedestal block having the smallest outer diameter at the other end. The pedestal block and the end pedestal block correspond to the axial two ends of the shaft tube. Between the base block and the end seat block, the base block, the end seat block, and each of the class blocks have a cylindrical shape, and the outer diameter of each of the class blocks is different and gradually decreases toward the end seat block; plural A positioning groove is formed on the base block; a plurality of latching grooves are formed on each of the class blocks and the end seat block; a base ring gear has a through hole at the center, and a plurality of fitting projections are formed on the base block The inner wall surface of the through hole, the base ring gear is sleeved on the mounting seat, the fitting convex block is embedded in the positioning groove of the base block; a plurality of ring gear assemblies are used to be sleeved on each of the blocks and Each of the end ring blocks includes a ring gear and a spacer ring, wherein the ring gear has A toothed ring through hole, a plurality of toothed ring locking blocks are formed on the inner wall surface of the toothed ring through hole, the spacer ring has a spacer ring through hole, and a plurality of spacer ring detent blocks are formed on the inner wall surface of the spacer ring through hole, One of the ring gear components is sleeved on the adjacent block of the base block, the spacer ring is placed on the base ring gear, and the ring gear rests on the spacer ring; the other ring gear components are sleeved respectively At each of the class block and the end seat block, and the spacer ring is located between the two ring gears; a lock cover is locked at one end of the shaft tube to restrict the ring gear components and the base ring gear from disengaging The mounting seat; wherein the surface of the base plate has a plurality of positioning protrusions, the annular surface of the base tooth ring has a plurality of positioning holes, the base tooth ring is sleeved on the mounting seat, and the positioning holes are combined with the positioning protrusions . According to the bicycle flywheel assembly structure described in item 1 of the patent application scope, wherein one end of the positioning groove of the base block is located at the outer edge of the base block, and the other end is closed and corresponds to the base block. In the radial direction, each of the positioning grooves corresponds to the axial direction of the base block and is penetrating. According to the bicycle flywheel set structure described in item 1 of the scope of the patent application, the periphery of each of the class blocks has a plurality of the latching slots, one part of the latching slot corresponds to the axial direction of the class block, and the other is The latch groove is not penetrated in the axial direction corresponding to the block. The spacer ring latch block of the spacer ring of the ring gear assembly is inserted into the latch groove with a non-penetrating structure. The detent block is embedded in the detent slot of the through structure and the detent slot of the through structure. According to the bicycle flywheel set structure described in item 1 of the scope of the patent application, wherein the periphery of the end seat block has a plurality of the catch grooves, one part of the catch grooves corresponds to the axial direction of the end seat block, and the other part of the The locking groove is not penetrated in the axial direction corresponding to the end seat block. The spacer ring retaining block of the spacer ring of the ring gear assembly is embedded in the retaining groove with a non-penetrating structure. The latching block is inserted into the latching slot of the through structure and the latching slot of the through structure. The bicycle flywheel structure according to item 1 of the scope of the patent application, wherein the ring surface of the ring gear assembly has a plurality of ring positioning holes, the ring surface of the spacer ring has a plurality of ring projections, and the ring The component is installed on the step block, and the toroidal projection of the spacer ring is embedded in the ring positioning hole of the ring. According to the bicycle flywheel set structure described in item 1 of the patent application scope, it further includes at least one positioning groove abutment block, which is installed on one side of the positioning groove and contacts the insert of the base ring gear. Hop together. According to the bicycle flywheel set structure described in item 1 of the scope of the patent application, the bicycle flywheel assembly structure further includes a plurality of latching groove retaining blocks, each of which has at least one latching groove retaining block installed on one side of the latching groove and The ring gear catch block contacting the ring gear of the ring gear assembly. The bicycle flywheel assembly structure described in item 1 of the patent application scope further includes at least one extended ring gear assembly, and one end of the shaft tube penetrates the end seat block, and the outer surface of the shaft tube has a plurality of embedded in the axial direction. A slot, wherein the extended ring gear assembly includes an extended ring gear and an extended spacer ring, the extended spacer ring has an extended spacer ring through hole, and a plurality of extended spacer ring latch blocks are formed on the inner wall surface of the extended spacer ring through hole, The center of the extended ring gear has an extended ring gear through hole. A plurality of extended ring gear latches are formed on the inner wall surface of the extended ring gear through hole. The extended ring gear and the extended spacer ring are stacked. The extended spacer ring detent block and the extended ring gear detent block of the extended ring gear are embedded in the recessed grooves on the surface of the shaft tube.