TWI608960B - Headset Expanding Device For Bicycle - Google Patents

Description

Bicycle bowl expander

The present invention relates to bicycles, and more particularly to a bicycle bowl expander.

Generally, the bicycle is connected by a dilator between the front fork and the standpipe. The dilator of the prior art includes a cover body, a plurality of discretely disposed anti-reverse sheets, and an elastic ring. The cover body extends at one end to abutting portion, and the plurality of anti-reverse film rings are disposed on the outer periphery of the abutting portion, and the elastic ring The sleeve is sleeved on the outer circumference of the plurality of support portions.

Conventional techniques extend the plurality of checkers against the inner wall of a standpipe through the abutment. However, the conventional anti-reverse sheet is separately disposed, and the plurality of anti-reverse sheets are fixed only by the elastic ring, so that the plurality of anti-reverse sheets are apt to slide and rotate relative to the supporting portion, thereby causing uneven force and easy The inner wall of the standpipe is not easy to disassemble and disassemble due to insufficient friction.

Therefore, it is necessary to provide a novel and progressive bicycle bowl expander to solve the above problems.

The main object of the present invention is to provide a bicycle bowl expander which can provide a stable combination and easy assembly and disassembly.

In order to achieve the above object, the present invention provides a bicycle bowl expander, comprising: a expansion tube, comprising a bottom portion, a plurality of abutting pieces disposed at the bottom portion, and a bottom portion opposite to the bottom portion a guiding end of the end, the bottom portion is provided with a screw hole, and the plurality of forced pressing pieces surround a chamber; a pressing tube is provided with a consistent hole, and the pressing tube comprises an outer diameter larger than a diameter of the chamber a tightening section and an abutting section connecting the pressing section, at least one of the abutting section and the guiding section is tapered toward the bottom direction; a bolt pierces the through hole and is screwed with the screw hole; When the bolt is adjusted to bring the abutting section close to the bottom and penetrate the chamber, the pressing section radially urges the plurality of forcing pieces to expand.

1‧‧‧Bicycle bowl expander

2‧‧‧ standpipe

3‧‧‧Snail lock tool

10‧‧‧Expansion tube

11‧‧‧ bottom

12‧‧‧Force

121‧‧‧ convex

13‧‧‧Guide section

14‧‧‧ screw holes

15‧‧ ‧ room

16‧‧‧ slotting

161‧‧‧ curved bottom

20‧‧‧forced cylinder

21‧‧‧through holes

22‧‧‧forced section

23‧‧‧Abutment

25‧‧‧First thread segment

26‧‧‧ Groove

27‧‧‧Circle

30‧‧‧ bolt

31‧‧‧Threaded section

32‧‧‧Bolt head

321‧‧‧ joint groove

40‧‧‧ Rings

50‧‧‧Cleaning pieces

51‧‧‧Second thread segment

52‧‧‧through hole

521‧‧‧ corner slot

53‧‧‧ neck section

54‧‧‧ Peng Da Du

55‧‧‧ Cover

60‧‧‧ ring body

1 is a perspective view of a preferred embodiment of the present invention.

2 is an exploded view of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a preferred embodiment of the present invention.

Figure 4 is a schematic view of the operation of a preferred embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to Figures 1 through 4, there is shown a preferred embodiment of the present invention. The bicycle bowl expander 1 of the present invention includes a expansion cylinder 10, a compression cylinder 20 and a bolt 30.

The expansion tube 10 includes a bottom portion 11 , a plurality of abutting portions 12 disposed on the bottom portion 11 and a guiding portion 13 opposite to the bottom portion 11 . The bottom portion 11 defines a screw hole 14 . 12 circumscribing a chamber 15; the pressing cylinder 20 is provided with a constant hole 21, and the pressing cylinder 20 includes a pressing portion 22 having an outer diameter larger than the radial distance of the chamber 15, and a connecting portion of the pressing portion 22. At least one of the abutting section 23 and the guiding section 13 is tapered toward the bottom portion 11; the bolt 30 passes through the through hole 21 and is screwed with the screw hole 14; When the bolt 30 brings the abutting section 23 close to the bottom portion 11 and penetrates into the chamber 15, the pressing section 22 The radial force is forced to expand and the plural is forced against the piece 12. Thereby, the plurality of forcing pieces 12 can generate sufficient friction force with the inner wall of the jointed vertical tube 2 to achieve fastening and easy disassembly.

Preferably, the bottom portion 11 can be a ring-shaped, C-shaped, square-shaped or the like, which is annular in this embodiment. The expansion tube 10 has a flared shape, and at least one convex portion 121 is disposed on an outer circumference of each of the pressing pieces 12; wherein each of the pressing pieces 12 is connected to one end of the bottom portion 11 to the other end. The portion 121 radially protrudes any of the portions of the abutting piece 12 other than the extending direction. The present invention does not limit the number of the convex portions 121. The force receiving area of the convex portion 121 and the number of the convex portions 121 can be adjusted according to requirements. In the present embodiment, the number of the convex portions 121 is one. Preferably, each of the convex portions 121 has an arc shape and is located in the pressing portion 22, so that each of the pressing pieces 12 is radially and firmly pressed against the vertical tube 2, wherein the expansion tube 10 penetrates the joint. The riser 2, each of the protrusions 121 abuts against the inner wall of the standpipe 2, whereby the expansion tube 10 can be positioned with the riser 2 when the tensioning cylinder 20 does not open the expansion tube 10. Preferably, the expansion tube 10 defines a slot 16 between the adjacent abutting pieces 12, and the slot 16 is provided with an arcuate groove bottom 161, whereby each of the abutting pieces 12 has a better shape. The range of elastic expansion.

Preferably, the guiding section 13 is tapered toward the bottom portion 11 , and the abutting section 23 is tapered away from the pressing section 22 , thereby providing the pressing cylinder 20 to smoothly penetrate into the chamber 15 . The guiding section 13 and the abutting section 23 are tapered or curved surfaces, which are tapered surfaces in this embodiment, and provide a better guiding effect.

The bicycle bowl expander 1 further includes a ring member 40 provided with the bolt 30, the ring member 40 being located outside the expansion tube 10. The bolt 30 is provided with a threaded section 31. The ring member 40 is sleeved on the threaded section 31, and the screw hole 14 is located between the ring member 40 and the pressing cylinder 20 to prevent the bolt 30 from coming off the screw hole 14. The ring member 40 is optionally disposed on the threaded portion 31. The threaded portion 31 is provided in the embodiment to enhance the positioning effect of the ring member 40.

The bicycle bowl expander 1 further includes a cover member 50. The peripheral wall of the pressing barrel 20 is provided with a first threaded section 25, and the cover member 50 is provided with a second threaded section 51 screwed to the first threaded section 25. Yu Ben In an embodiment, the pressing cylinder 20 is provided with a recess 26, and the first threaded section 25 is annularly disposed on the inner wall of the recess 26. The cover member 50 and the pressing tube 20 are combined, and the cover member 50 is guided to move relative to the through hole 21 of the pressing member 20.

The bicycle bowl expander 1 includes a ring body 60, and the tightening cylinder 20 is provided with a ring groove 27, and the ring body 60 is embedded in the ring groove 27 and protrudes into the pressing tube 20, and the pressing tube 20 is The first threaded portion 25 is located between the annular groove 27 and the through hole 21; wherein the annular groove 27 is optionally disposed on the first threaded portion 25, and in the embodiment, the annular groove 27 is disposed in the ring groove 27 On the first thread segment 25, the second thread segment 51 is prevented from disengaging the tensioning cylinder 20.

In detail, the cover member 50 defines a through hole 52. The bolt 30 is provided with a bolt head 32 having a diameter larger than the diameter of the through hole 21. The bolt head 32 is located between the cover member 50 and the through hole 21, and the bolt The head 32 is provided with an engagement groove 321 toward the through hole 52, so that the screw-locking tool 3 for screwing is engaged with the engagement groove 321 through the through hole 52 to adjust the bolt 30. Preferably, the engaging groove 321 is a polygonal hole, and the through hole 52 is provided with a plurality of angular grooves 521 at opposite ends of the bolt 30, so that the screwing tool 3 can firmly adjust the engaging groove 321 and the cover member 50.

Preferably, the cover member 50 further includes a neck portion 53 and a pen segment 54 connecting the neck portion 53. The pen segment 54 is closer to the through hole 21 than the neck portion 53. The second thread segment 51 is provided. In the Peng section 54, the outer diameter of the neck section 53 is smaller than the inner diameter of the ring body 60, whereby the neck section 53 can be moved away from the pressing cylinder 20 while preventing the Peng section 54 from being disengaged from the pressing cylinder 20.

The cover member 50 is further provided with a cover edge 55 connected to the neck portion 54 and connected to the neck portion 53. The outer diameter of the cover edge 55 is larger than the outer diameter of the expansion tube 10, thereby supporting the vertical tube 2 Nozzle.

Preferably, the expansion tube 10, the pressing tube 20, the bolt 30 and the cover member 50 are coaxially disposed to stably adjust the relative motion of the four.

In the case of the actual use, in the assembled state, the expansion tube 10 penetrates the vertical tube 2, and the plurality of pressing pieces 12 are supported against the inner wall of the vertical tube 2, and the cover edge 55 is supported by the vertical tube 2 Pipe end, with one The screw lock tool 3 rotates the bolt 30 to drive the expansion tube 10 to be displaced toward the pressing cylinder 20 to radially expand the plurality of pressing pieces 12 to press the inner wall of the vertical tube 2; otherwise, the bolt 30 is reversed. The tight cylinder 20 is away from the chamber 15 to release the state of the plurality of pressing pieces 12 to press the vertical tube 2, so that the bicycle bowl expander 1 is disengaged from the vertical tube 2; so that the user can easily and quickly disassemble And the bicycle bowl expander 1 is installed.

1‧‧‧Bicycle bowl expander

10‧‧‧Expansion tube

20‧‧‧forced cylinder

50‧‧‧Cleaning pieces

Claims (9)

A bicycle bowl expander for coupling into a standpipe, the bicycle bowl expander comprising: a expansion tube, comprising a bottom portion, a plurality of abutting pieces disposed at the bottom portion and an end opposite to the bottom portion a guiding hole, the bottom portion is provided with a screw hole, the plurality of forcing pieces enclose a chamber; a pressing tube, a continuous hole is arranged, the pressing tube includes an outer diameter larger than the diameter of the chamber a tightening section and an abutting section connecting the pressing section, at least one of the abutting section and the guiding section is tapered toward the bottom direction; a bolt is inserted through the through hole and screwed with the screw hole; Wherein, when the bolt is adjusted to close the bottom portion and penetrate the chamber, the pressing portion radially urges the plurality of pressing pieces to be expanded; wherein each of the pressing pieces is provided with at least one convex portion When the expansion tube penetrates into the jointed pipe for assembly, each of the convex portions abuts against the inner wall of the vertical pipe; wherein, in the extending direction of each of the abutting pieces connecting the one end of the bottom to the other end, Each of the convex portions radially protrudes from any portion of the pressing piece other than the extending direction. The bicycle bowl expander of claim 1, wherein the guiding portion tapers toward the bottom portion, and the abutting portion tapers away from the pressing portion. The bicycle bowl expander according to claim 1, further comprising a ring member provided with the bolt, the ring member being located outside the expansion tube. The bicycle bowl expander of claim 1, wherein the expansion tube defines a slot between the adjacent abutting pieces, and the slot is provided with an arcuate groove bottom. The bicycle bowl expander of claim 1, further comprising a cover member, the peripheral wall of the pressing cylinder is provided with a first threaded section, and the cover member is provided with a second threaded section screwed to the first threaded section . The bicycle bowl expander according to claim 5, wherein the cover member is provided with a through hole, and the bolt is provided with a bolt head having a diameter larger than the diameter of the through hole, the bolt head being located between the cover member and the through hole The bolt head is provided with an engagement groove toward the through hole. The bicycle bowl expander according to claim 5, further comprising a ring body, wherein the pressing ring is provided with a ring groove, the ring body is embedded in the ring groove and protrudes into the pressing tube, and the pressing tube is The first thread segment is located between the annular groove and the through hole. The bicycle bowl expander according to claim 7, wherein the cover member comprises a neck portion and a Peng section, the Peng section is closer to the through hole than the neck portion, and the second thread segment is disposed in the Peng section. In the large section, the outer diameter of the neck section is smaller than the inner diameter of the ring body. The bicycle bowl expander according to claim 8, wherein the expansion tube, the pressing tube, the bolt and the cover member are coaxially disposed; the expansion tube has a trumpet shape; and a set of the ring for the bolt is further included The ring member is located outside the expansion tube, the bolt is further provided with a threaded portion, the ring member is sleeved on the threaded portion, and the screw hole is located between the ring member and the pressing tube; the expansion tube is different from Between the adjacent urging pieces, a slot is defined, and the slot is provided with an arcuate groove bottom; each of the urging pieces is provided with at least one protrusion, and each of the protrusions is arc-shaped and located at the a tensioning section, wherein the expansion cylinder penetrates into a combined vertical pipe, each of the convex portions abuts against an inner wall of the vertical pipe; the pressing cylinder is provided with a groove, and the first threaded segment is disposed in the groove The inner wall of the ring is located in the first threaded section; the cover member is provided with a through hole, and the bolt is provided with a bolt head having a diameter larger than the diameter of the through hole, and the bolt head is located between the cover member and the through hole The bolt head is provided with an engaging groove toward the through hole, and the engaging groove is a polygonal hole; the through hole is provided with a plurality of holes at the other end of the bolt An angle groove; the cover member further has a cover edge connected to the neck portion and connected to the neck portion, the cover edge outer diameter being larger than the outer diameter of the expansion tube.