CN2883155Y

CN2883155Y - Integrated fork column

Info

Publication number: CN2883155Y
Application number: CN 200520105351
Authority: CN
Inventors: 林华正
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-21
Filing date: 2005-09-21
Publication date: 2007-03-28
Anticipated expiration: 2015-09-21

Abstract

One-piece formed front fork tube device is provided, which is an iron tube material with scheduled length and takes a scheduled distance as two-cut partial cutting in the center to divide the iron tube material into three segments as the first, the second and the third sections and forms one-piece formed front fork tube via the processing of bending, extrusion and tube expansion. The device comprises two front fork exterior tubes which are the first and third sections assumed as parallel symmetry after being bending with its upper part provided with a hatch formed through the processing of tube expansion, two front-fork feet which are formed at the lower part outside tube of each front fork; a lap joint section which is the second section and formed between two adjacent inner sides at the upper part of each front fork tube via extrusion processing. With regards to the components which are formed via the processing of the iron tube materials, it turns out to a one-piece formed fork tube which has higher stiffness and is able to bear bigger wallop.

Description

Integrated front fork tube device

[technical field]

The utility model relates to a kind of front fork tube device of bicycle, is meant a kind of integrated front fork tube device especially.

[background technology]

Cycle racing is quite in fashion the America and Europe, especially car (Mountain Bike climbs the mountain, write a Chinese character in simplified form MTB) appearance, it with people from originally being confined in the city merely or intercity traffic activity and then bring between the mountain forest, make people convert the simple vehicle to multi-functional outdoor activity instrument near nature, the extension visual field.

Because bicycle mainly is as the linking of each position device, the conduction of strength and the weight that supports the rider with simple vehicle frame, to focus on intensity in the design of front fork tube enough more for industry for this reason, can make under the driving of high-strength impact and not have the crooked safety worries of fracture; Light weight, bicycle weight is light more good more, so just laborsavingly more rides soon more; And elasticity, able to suppress shock using slowed down impulsive force etc.

The rider is when driving bicycle, particularly drive mountain-climbing car (MTB) or professional descending racing car, must possess off-road capability, therefore the design of frame system and frame is quite important, breeches pipe up and down particularly, it is below the stem and between the front-wheel, mainly as the conduction of strength and turn to, it must bear the power that pressed down by the rider and contact the impulsive force that is produced from front-wheel with ground, so its structure must possess preferable intensity to accept respectively from dual strength up and down; Simultaneously, good preceding breeches pipe up and down, make by the road surface impulsive force that comes and rider trample the application of force via before this up and down the conductance of breeches pipe promote, can allow the rider therefrom experience preferable handling, moreover possess higher rigidity and then can bear bigger impulsive force, and the situation generation of reduction bend fracture, increase service life.

Industry often is used in up and down that the pipe fitting material of front fork tube mostly is aluminium alloy pipe, forms embryonic tube in the mode of extruding, and bestows the processing such as welding, the flattening of fork pin, boring of clinch again; Other has a kind of is that this clinch is located between two front fork tubes in one-body molded mode, be as strengthening clinch and the intensity between this front fork tube respectively, please refer to Fig. 9 to Figure 11, manufacture method (the 911 No. 23843 patent of invention of TaiWan, China patent) by known the one-body molded shock-proof front-fork assembly Guan Diguan of exposure, it comprises the following step: (one) moulding embryonic tube 80: make the embryonic tube 80 of a tool tube axial portion 81 and flank 82 in the extrusion forming mode, and should pipe portion 81 axially form a containing hole 811; (2) cut the front fork waste material: cut flank 82:(three on embryonic tube 80 2 end opposite with predetermined front fork length) bending forming front fork tube 85: the part pipe portion 81 of cutting out place, end in the middle of the embryonic tube down, again with the flank 82 at this place as bending part, make two end opposite of embryonic tube be indexed into subparallel position and form front fork tube 85 towards relative direction; (4) the punch forming front fork colludes pawl 86: the open end of two front fork tubes 85 is flattened, and make in the punch forming mode and collude pawl 86.

With the made front fork outer tube of above-mentioned manufacture method, make this flank 82 be shaped in respectively this two front fork tube 85, it can reach the higher effect of intensity really; Yet, the made front fork tube 85 of this manufacture method is mainly the aluminum material and extrudes out embryonic tube 80, and cut centre portion in advance to form this rib neighbour 82, and the pipe material that cuts two tail ends is in advance processed to do to flatten, then produce cooresponding waste material so that cause waste (is waste material for cutting as Figure 10 line of cut position), moreover the intensity of flank after cutting and two front fork tube joining places still has the space of reinforcement, therefore on manufacturing process and textural still the needs improve.

[utility model content]

Main purpose of the present utility model is promptly providing a kind of integrated front fork tube device, its be utilize iron material pipe material via bending, extruding, expander, procedure for processing such as flatten and form, so have preferable intensity.

Of the present utility model time a purpose is promptly providing a kind of integrated front fork tube device, and it can effectively use the embryonic tube material, reduces waste material and produces, and reduces manufacturing cost.

Of the present utility model time a purpose is promptly providing a kind of integrated front fork tube device, and it can avoid being offset because of welding processing causes check and correction, problems such as not prison welding is solid, distortion, rough surface, effectively promotes product design.

A purpose more of the present utility model is promptly providing a kind of integrated front fork tube device, and it can apply to the heterotype tubing of arbitrary moulding, so its moulding can be according to the required variation of making diversity of vehicle frame.

For reaching aforesaid effect, the disclosed integrated front fork tube device of the utility model, it is characterized in that: it is that iron material pipe material with predetermined length is divided into one first, second, third section, and be the formed one-body molded front fork tube of two ends binding the first, the 3rd section by second section, it includes: two front fork outer tubes, be this first and the 3rd section, and this first and the 3rd section links second section of bending, and being parallel symmetry shape, this front fork outer tube top has an opening respectively; Two front forks fork pin is to be formed at respectively this front fork outer tube below; One clinch is second section, is to be formed at respectively between adjacent inboard, this front fork outer tube top two.

By above-mentioned member, be with iron material pipe material through the integrated front fork tube device of above-mentioned procedure for processing, can have high stiffness, and can bear greater impact power.

[description of drawings]

Fig. 1 is the manufacturing process scheme drawing of the utility model one preferred embodiment.

Fig. 2 processes scheme drawing for the cutting otch of bestowing of the utility model one preferred embodiment.

Fig. 3 bestows the bending process scheme drawing for the utility model one preferred embodiment.

Fig. 4 bestows the extrusion process scheme drawing for the utility model one preferred embodiment.

Fig. 5 processes scheme drawing for the expander of bestowing of the utility model one preferred embodiment.

Fig. 6 flattens the processing scheme drawing for bestowing of the utility model one preferred embodiment.

Fig. 7 is the planar appearance scheme drawing of another embodiment of the utility model.

Fig. 8 is the schematic side view of another embodiment of the utility model of Fig. 7.

Fig. 9 is the manufacturing process scheme drawing of known front fork tube structure.

Figure 10 is the processing of cutting scheme drawing of known front fork tube structure.

Figure 11 is the planar appearance scheme drawing of known front fork tube structure.

[specific embodiment]

At first please refer to Fig. 1 to Fig. 6, a kind of integrated front fork tube device 20 provided by the utility model, it is mainly made according to the following step:

(a) cutting otch: be with one of predetermined length iron material pipe material 10, cut, this iron material pipe material 10 is divided into one first, second,

third section

13,14,15 in the part that its central authorities make two

otch

11,12 with a preset distance.

(b) bending process: be after iron material pipe material bending is a type, both are the two front fork outer tubes 21 that are parallel symmetry shape for this first, the

3rd sections

13,15; Its top is because of forming an opening 22 after these

otch

11,12 bendings; 14 of this second sections are and are shaped in a respectively clinch 23 of this front fork outer room.

(c) extrusion process: this clinch 23 is imposed extrusion process, make its predetermined moulding tubulose that forms hollow, and this clinch 23 is positioned at respectively on 21 liang of central axis of this front fork outer tube; One protuberance 231 is formed at this clinch 23 central parts simultaneously, and this protuberance 231 is the reservation positions as follow-up perforation processing.

(d) expander processing: this opening 22 is done the expander processing of predetermined moulding

(e) flatten processing: be the open end of these front fork outer tube 21 belows respectively to be bestowed flatten processing, to form the front fork fork pin (24) that colludes claw-like respectively.

By above-mentioned manufacturing course, can obtain integrated front fork tube device, be iron material pipe material, it includes: two front fork outer tubes 21, both are parallel symmetry shape, and its top has an opening 22 respectively; Two front forks fork pin 24 is to be shaped in respectively this front fork outer tube below; One clinch 23 is to be formed at respectively between adjacent inboard, this front fork outer tube 21 tops two in one-body molded mode; One protuberance 231 is to be shaped in this clinch 23 central parts.

Be worth mentioning, in the time of must cooperating a disc brake apparatus as this front fork fork pin 24, then this front fork fork pin 24 must be done suitable variation and can't be to flatten when shaping according to this disc brake apparatus, and the processing mode that can weld this front fork fork pin 24 replaces.

Please refer to Fig. 7 to Fig. 8, is to be another embodiment of the utility model, and wherein this clinch 23 is when step c extrusion process, and it is pushed towards predetermined side, makes this clinch 23 be located at respectively 21 liang of central axis one sides of this front fork outer tube partially.

Comprehensively above-mentioned, a kind of integrated fork column provided by the utility model, its On the structure and on using following Characteristic is arranged: one, iron material materials in the tube 10 are via above-mentioned processing The processing procedure moulding can get a high stiffness, and can bear the integrated front fork of greater impact power Pipe.

Two, structure of the present utility model, it is this clinch and front fork outer tube convergence part tool smoothness respectively Outward appearance, the situation of no burr, coarse surface or distortion produces.

Three, can apply to all kinds of iron materials or aluminium alloy materials in the tube by technology of the present utility model, Non-such as pipe, elliptical tube, D type pipe, square tube, polygonal pipe, droplet-shaped pipe, special pipe etc. The front fork tube of pipe inner tube, and organize and establish the various front fork inner pipe that can match, so have on using Polynary variation in moulding and selection.

Four, utilize the respectively design of this otch, this opening of self-assembling formation after bending imposes the step again The embryonic tube material can be effectively used in the extrusion process of rapid c, reduces waste material and produces, and reduction manufactures This.

Five, this clinch is to be shaped with extrusion process, and it is the tubing with former big external diameter, squeezes Be pressed into the hollow tubular of the default external form of tool and littler external diameter, so have higher intensity.

Six, this clinch can form this protuberance simultaneously when step c extrusion process is shaped, and This clinch can be according to the variation that must do on the contour shape.

Claims

1, a kind of integrated front fork tube device, it is characterized in that: it is that iron material pipe material with predetermined length is divided into one first, second, third section, and be that it includes by the formed one-body molded front fork tube of two ends binding the first, the 3rd section of second section:

Two front fork outer tubes are this first and the 3rd section, and this first and the 3rd section links second section of bending, and is parallel symmetry shape, and this front fork outer tube top has an opening respectively;

Two front forks fork pin is to be formed at respectively this front fork outer tube below;

One clinch is second section, is to be formed at respectively between adjacent inboard, this front fork outer tube top two.

2, according to the described integrated front fork tube device of claim 1, it is characterized in that:

This clinch central part has a protuberance, is to form simultaneously during for extrusion process.

3, according to the described integrated front fork tube device of claim 1, it is characterized in that:

This overlapping part is on these front fork outer tube two central axis respectively.

4, according to the described integrated front fork tube device of claim 1, it is characterized in that:

This clinch is located at respectively this front fork outer tube two central axis one side partially.

5, according to the described integrated front fork tube device of claim 1, it is characterized in that:

This iron material pipe material is the special pipe for default how much external forms.

6, according to the described integrated front fork tube device of claim 1, it is characterized in that:

This iron material pipe material is to be rectangular tube.

7, according to the described integrated front fork tube device of claim 1, it is characterized in that:

This iron material pipe material is to be oval pipe.