CN203681795U - Bicycle front fork with improved structure - Google Patents

Abstract

The utility model provides a bicycle front fork with an improved structure. The bicycle front fork comprises a front fork shoulder base, a middle pipe and a bicycle head pipe, wherein the front fork shoulder base is an inverted-U-shaped hollow pipe body, a combination hole penetrating through the pipe body is formed in the center of the U shape, an extending section is integrally and axially arranged above the combination hole and arranged on the front fork shoulder base, the extending section is provided with a positioning portion, the whole positioning portion is in an oblique plane shape, the positioning portion is sleeved with a bearing, the middle pipe penetrates into the combination hole from bottom to top, the bicycle head pipe and the middle pipe penetrate through each other in a sleeved mode, and the interior of the bicycle head pipe and the bearing abut against each other. By means of the components, the positioning portion can be sleeved with the bearing, the concentricity between the front fork shoulder base and the middle pipe is good, the service life of the bearing and the service life of the structure are effectively prolonged, and the bicycle front fork with the improved structure is convenient and fast to assemble, and has excellent innovation, convenience and practicability.

Description

Structure improved bicycle front fork

Technical field

The utility model relates to a kind of bicycle front fork shoulder base structural improvement, espespecially one can lift structure intensity and concentricity good, and the bicycle front fork of convenient utility effect of tool rapid-assembling.

Background technology

The front fork structure of bicycle has a front fork shoulder seat, in this front fork shoulder seat, be provided with pipe in, for mutually wearing with the head tube of headstock, and the group connecting part position of takeing between seat and head tube in front fork tube is provided with bearing arrangement, borrow this head tube to drive front fork structure, with the effect that provides headstock to turn to.

Package assembly between general front fork shoulder seat and head tube, this front fork shoulder seat is the hollow tube that is inverted U-shaped shape, its both sides, below are provided with two breeches pipes of forked, and these front fork shoulder seat central authorities are provided with pipe in, in this, between pipe and front fork shoulder seat, are arranged with plug, then a bearing carrier ring is located at down to side beyond the Great Wall, borrow this lower plug to provide bearing carrier ring to set the effect of position, then will in this, mutually wear with head tube by pipe again, and this bearing is arranged between head tube and middle pipe, forms a front fork structure.

Common front fork shoulder holder structure, the shaped structure in this between pipe and front fork shoulder seat can be divided into again integral type and two-piece type.

Press, the front fork shoulder holder structure of existing integral type, as disclosed in No. 092209101 new patent of TaiWan, China " improvement of front fork tube molding structure ", mainly comprise: a front fork tube, this front fork tube one end, one-body molded have a U-shaped joining base, and this U-shaped joining base and front fork tube are a high-intensity setting; Wherein U-shaped joining base include two ends, is extended with respectively a fit portion, and this fit portion can provide respectively socket pipe box solid, and and front fork tube can be fixed on to wheel rim by faucet pipe and form.

The front fork shoulder holder structure of another existing two-piece type, as No. 100224548 new patent of TaiWan, China disclosed " Front crown ", comprises: a socket section, and extend and there is an opening along an axis direction; And two extension, extended away from this axis and this opening direction by the two opposition sides courts in contrast to this opening one end respectively, each extension comprises that respectively one is connected in the shoulder of this socket section, and one by this shoulder towards the socket part of extending and have a socket away from this opening direction, this each shoulder caliber is greater than respectively this each socket part caliber, this each socket is communicated in respectively this opening, and this socket section and this each extension are that metallic material is made of one piece.

In above-mentioned taken off structure, the former one-body moldedly in this front fork tube one end has a U-shaped joining base, and these U-shaped joining base two ends are extended with fit portion with solid with socket pipe box, and this front fork tube and head tube wear mutually; The latter extends and is provided with ostiolate socket section along axis direction, and a standpipe is worn and be fixed in this opening, forms two-piece design, and is provided with two extensions in this opposition side, opening one end, for being socketed with front fork inner pipe between this standpipe and Front crown; No matter be the front fork shoulder holder structure of integral type or two-piece type, after being arranged with plug between this front fork tube (standpipe) and U-shaped joining base (Front crown), after again a bearing and front fork tube (standpipe) being worn mutually, and this bearing is arranged at down to side beyond the Great Wall, the effect of borrowing this lower plug to provide bearing carrier ring to set position, more then head tube and front fork tube (standpipe) are worn mutually.

Just, the forming mode of the former front fork tube, to utilize that repeatedly to take out Guan Houzai tempered, with the front fork tube length and the external diameter that are shaped default, but this forming mode can cause the concentricity between front fork tube and U-shaped joining base to produce deviation, fine ratio of product is low, and easily affects bearing and structural life-time after making to assemble bearing; Between the latter's Front crown and standpipe, for two-piece type group connects, though the scarce fraud that this Front crown is shaped without integral type, so its assembling and member are comparatively loaded down with trivial details, and structural strength is poor; And both front fork shoulder holder structures all need be arranged with lower plug between front fork tube (standpipe) and U-shaped joining base (Front crown), and therefore the inventor thinks the space of further improvement.

Utility model content

Main purpose of the present utility model is to provide a kind of structure improved bicycle front fork, and the concentricity of its front fork shoulder seat and middle pipe is good, can effectively promote the service life of bearing and structure, and its assembling is convenient, quick, the splendid innovation of tool and convenient utility.

The main technical schemes that the utility model provides is:

A kind of structure improved bicycle front fork, it includes: a front fork shoulder seat, for the hollow tube of inverted U-shaped shape, there is a combined hole that runs through body in U-shaped centre, this front fork shoulder seat is in this combined hole upper shaft to being integrally formed with an extension, and this extension is provided with the location division that entirety takes the form of inclined plane, be arranged with a bearing in this location division; Two junction surfaces, are integrally formed in this front fork shoulder seat bottom two sides, and to be bonded with each other with two breeches pipes, these two breeches pipes are fixed on wheel rim; Pipe in one, in this, pipe is from bottom to top arranged in this combined hole; A head tube, wears mutually with pipe in this, and this head tube is inner and this bearing is supported mutually.By above-mentioned member, this location division can be sheathed for bearing, and the concentricity of this front fork shoulder seat and middle pipe is good, effectively promotes the service life of bearing and structure, and its assembling is convenient, quick, the really splendid innovation of tool and convenient utility.

In one embodiment, this front fork shoulder seat top is provided with an edge face in this combined hole periphery, and this location division is the inclined-plane being formed between this extension and this edge face, and a lateral margin and this location division of this bearing bottom are supported mutually, this inside, head tube bottom is concaved with an abutting part on default inclined-plane, and a lateral margin at this abutting part and this bearing top is supported mutually.

In one embodiment, in this, manage bottom outer periphery and convex with a stop part, and in the time that pipe in this is from bottom to top arranged in this combined hole, this stop part is limited to this combined hole bottom.

In one embodiment, this front fork shoulder seat top is provided with an edge face in this combined hole periphery, this location division comprises the inclined-plane, an extension of being located at this extension periphery and having default gradient, and be located at the vertical bearing surface that is between this inclined-plane, extension one side and this edge face, be provided with plug under in this edge surface cover, and this lower plug one side and this bearing surface mutually support and paste, and this bearing carrier ring is located between this lower plug and head tube inside.

Be preferably, the length on this inclined-plane, extension is more than the twice of bearing surface length.

The beneficial effects of the utility model are:

This structure improved bicycle front fork of the present utility model, to be integrally formed with an extension in this front fork shoulder seat combined hole top, and this extension has the location division taking the form of inclined plane, sheathed for this bearing, can save the setting of existing lower plug, then will after in this, pipe wears combined hole and with head tube, mutually wear, its group is established more quick and convenient, really reaches splendid innovation practicality and convenience; This front fork shoulder seat top is integrally formed with extension, makes the concentricity of this front fork shoulder seat and middle pipe good, can effectively promote the service life of this bearing and structure; This front fork shoulder seat is one of the forming and makes, and its structural strength is good, and fine ratio of product is high; In this, manage bottom and be provided with stop part, pipe in this is from bottom to top penetrated after combined hole, borrow this stop part engagement to be positioned combined hole bottom, can prevent from wearing situation incomplete, excessive or that deviate from, to reach effect of strong fix; On this front fork shoulder seat combined hole, can be integrally formed with the extension of preset length, can increase the area of contact between Zhou Yuzhong pipe in it, to reach the effect that increases front fork shoulder holder structure intensity; Between this front fork shoulder seat top edge face and extension, can establish for lower plug sleeve, this lower plug can be sheathed for bearing, and the convenient utility with general headset component sharing can be provided.

Brief description of the drawings

Fig. 1 is the stereo appearance figure of the utility model one preferred embodiment.

Fig. 2 is the three-dimensional exploded view of the utility model one preferred embodiment.

Fig. 3 is the cutaway view of the utility model one preferred embodiment.

Fig. 4 is the semi-sictional view enlarged drawing of the utility model one preferred embodiment.

Fig. 5 is the three-dimensional exploded view of another embodiment of the utility model.

Fig. 6 is the cutaway view of another embodiment of the utility model.

Fig. 7 is the semi-sictional view enlarged drawing of another embodiment of the utility model.

[main element nomenclature]

Front fork shoulder seat 10

Edge face 12

Location division 14

Extension 16

Bearing surface 18

Bearing 20

Lateral margin 22

Breeches pipe 30

Middle pipe 40

Head tube 50

Lower plug 60.

Detailed description of the invention

First please refer to Fig. 1 to Fig. 4, the structure improved bicycle front fork of one provided by the utility model, it consists predominantly of: in a front fork shoulder seat 10, a bearing 20,, manage 40 and a head tube 50.

This front fork shoulder seat 10, for the hollow tube of inverted U-shaped shape, there is a combined hole 11 that runs through body in U-shaped centre, these front fork shoulder seat 10 tops are provided with an edge face 12 in combined hole 11 peripheries, convex with an extension 13 in these combined hole 11 upper shaft to one, and between this extension 13 and edge face 12, be formed with the location division 14 that default gradient takes the form of inclined plane, be arranged with a bearing 20 in this location division 14, and a lateral margin 21 of these bearing 20 bottoms is supported mutually with location division 14; Two junction surfaces 15, are integrally formed in this front fork shoulder seat 10 bottom two sides, for being bonded with each other with two breeches pipes 30, borrow this two breeches pipe 30 to be fixed on wheel rim.

In this, manage 40, its bottom outer periphery convexes with a stop part 41, make in this, managing 40 and from bottom to top penetrating combined hole 11, and this stop part 41 is limited to combined hole 11 bottoms.

This head tube 50, is located at bicycle headstock position, and these head tube 50 inside, bottom are concaved with an abutting part 51 on default inclined-plane, make this head tube 50 mutually wear with middle pipe 40, and this abutting part 51 is supported mutually with a lateral margin 22 at bearing 20 tops.

By above-mentioned member, these front fork shoulder seat 10 combined hole 11 top peripheries are integrally formed with the location division 14 on tool inclined-plane, for this sheathed location of bearing 20, then wear after combined hole 11 managing 40 in this, and mutually wear with this head tube 50, can save the setting of existing lower plug, make group establish more quick and convenient, and the concentricity between this front fork shoulder seat 10 and middle pipe 40 is good, effectively promote the service life of bearing 20 and structure, therefore integral structure has innovation and practical convenience.

By for further understand the utility model structural attitude, application technology means and effect of reaching of expection, hereby the utility model occupation mode is described below:

Establish and use for of the present utility model group, in this, to manage 40 combined holes 11 that from bottom to top penetrate front fork shoulder seat 10, and borrow this stop part 41 to be limited to combined hole 11 bottoms, then this bearing 20 is sheathed on to location division 14, this lateral margin 21 is supported mutually with location division 14, more then this head tube 50 is worn mutually with middle pipe 40, and these head tube 50 bottom abutting parts 51 are supported mutually with bearing 20 another lateral margins 22, this bearing 20 is positioned between head tube 50 and front fork shoulder seat 10, and group has been established.

Please refer to shown in Fig. 5 to Fig. 7, for of the present utility model another implemented illustration, wherein these combined hole 11 upper shaft convex with an extension 16 of predetermined length to one, these extension 16 peripheries are provided with an inclined-plane 17 of default gradient, between these extension 16 inclined-plane 17 1 sides and edge face 12, be provided with a bearing surface 18 that is vertical, be arranged with and fill in 60 in this edge face 12, and these lower plug 60 1 sides and bearing surface 18 mutually support and paste, can be sheathed for bearing 20 on this lower plug 60, this bearing 20 is arranged between head tube 50 and front fork shoulder seat 10 inside, convenient utility with general headset component sharing can be provided, and the design of this extension 16, in it, can increase the area of contact with middle pipe 40 week, can reach the effect that promotes these front fork shoulder seat 10 structural strengths, wherein, the length on these 16 inclined-planes 17, extension is length more than bearing surface 18 twices.

This structure improved bicycle front fork of the present utility model, to be integrally formed with an extension 13 in these front fork shoulder seat 10 combined hole 11 tops, and this extension 13 has the location division 14 taking the form of inclined plane, sheathed for this bearing 20, can save the setting of existing lower plug, then wear combined hole 11 afterwards and mutually wear with head tube 50 managing 40 in this, its group is established more quick and convenient, really reaches splendid innovation practicality and convenience; These front fork shoulder seat 10 tops are integrally formed with extension 13, make this front fork shoulder seat 10 good with the concentricity of middle pipe 40, can effectively promote the service life of this bearing 20 and structure.

This front fork shoulder seat 10 is one of the forming and makes, and its structural strength is good, and fine ratio of product is high; In this, manage 40 bottoms and be provided with stop part 41, make to manage 40 in this and from bottom to top penetrate after combined hole 11, borrow these stop part 41 engagements to be positioned combined hole 11 bottoms, can prevent from wearing situation incomplete, excessive or that deviate from, to reach effect of strong fix.

On these front fork shoulder seat 10 combined holes 11, can be integrally formed with the extension 16 of preset length, can increase the area of contact of 40 of its interior Zhou Yuzhong pipes, to reach the effect that increases front fork shoulder seat 10 structural strengths; Can be sheathed for lower plug 60 between these front fork shoulder seat 10 top edge faces 12 and extension 16, this lower plug 60 can be sheathed for bearing 20, and the convenient utility with general headset component sharing can be provided.

Comprehensively above-mentioned, the utility model disclosed " structure improved bicycle front fork ", be to provide the integrally formed front fork shoulder seat 10 of a tool, these front fork shoulder seat 10 tops are integrally formed with extension 13, and this extension 13 has the location division 14 taking the form of inclined plane, sheathed for bearing 20, can save the setting of lower plug, then wear after front fork shoulder seat 10 managing 40 in this, and mutually wear with head tube 50, its group is established more quick and convenient, and make this front fork shoulder seat 10 good with the concentricity of middle pipe 40, effectively promote the service life of bearing 20 and structure, in order to do making really tool industrial applicability and innovation benefit of entirety, and it forms structure and had not seen again all books and periodicals or open use, really meet utility application important document, earnestly ask an ancient unit of weight office explicit example for reference, grant a patent early, most sense is prayed.

Need Chen Mingzhe, the above is specific embodiment of the utility model and the know-why used, if the change of doing according to conception of the present utility model, its function producing does not exceed specification sheets and graphic contained when spiritual yet, all should, in scope of the present utility model, close and give Chen Ming.

Claims (5)

1. a structure improved bicycle front fork, is characterized in that including:

A front fork shoulder seat, for the hollow tube of inverted U-shaped shape, there is a combined hole that runs through body in U-shaped centre, this front fork shoulder seat is in this combined hole upper shaft to being integrally formed with an extension, and this extension is provided with the location division that entirety takes the form of inclined plane, be arranged with a bearing in this location division; Two junction surfaces, are integrally formed in this front fork shoulder seat bottom two sides, and to be bonded with each other with two breeches pipes, this two breeches pipe is fixed on wheel rim;

Pipe in one, in this, pipe is from bottom to top arranged in this combined hole;

A head tube, wears mutually with pipe in this, and this head tube is inner and this bearing is supported mutually.

2. according to structure improved bicycle front fork described in claim 1, it is characterized in that: this front fork shoulder seat top is provided with an edge face in this combined hole periphery, and this location division is the inclined-plane being formed between this extension and this edge face, and a lateral margin and this location division of this bearing bottom are supported mutually, this inside, head tube bottom is concaved with an abutting part on default inclined-plane, and a lateral margin at this abutting part and this bearing top is supported mutually.

3. according to structure improved bicycle front fork described in claim 1, it is characterized in that: in this, manage bottom outer periphery and convex with a stop part, and in the time that pipe in this is from bottom to top arranged in this combined hole, this stop part is limited to this combined hole bottom.

4. according to structure improved bicycle front fork described in claim 1, it is characterized in that: this front fork shoulder seat top is provided with an edge face in this combined hole periphery, this location division comprises the inclined-plane, an extension of being located at this extension periphery and having default gradient, and be located at the vertical bearing surface that is between this inclined-plane, extension one side and this edge face, be provided with plug under in this edge surface cover, and this lower plug one side and this bearing surface mutually support and paste, and this bearing carrier ring is located between this lower plug and head tube inside.

5. according to structure improved bicycle front fork described in claim 4, it is characterized in that: the length on this inclined-plane, extension is more than the twice of bearing surface length.

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