CN202624536U

CN202624536U - Bicycle head tube structure

Info

Publication number: CN202624536U
Application number: CN201220274887XU
Authority: CN
Inventors: 王俊萍; 孙文鸿; 赵恒章; 杜宇; 周伟
Original assignee: TIANJIN QINGTAI SPORTS EQUIPMENT CO Ltd
Current assignee: TIANJIN QINGTAI SPORTS EQUIPMENT CO Ltd
Priority date: 2012-06-12
Filing date: 2012-06-12
Publication date: 2012-12-26
Anticipated expiration: 2022-06-12

Abstract

Provided is a bicycle head tube structure. The bicycle head tube structure is of a reducer tee structure which is made of seamless tubes in hot forming in a multiple drawing method. The bicycle head tube structure obviously reduces manufacture cost of a titanium-made head tube and simplifies manufacture process. By adopting a tee long support tube of the bicycle head tube structure to weld a bicycle frame, the problem of stress concentration in a head tube portion of an ordinary frame because of fillet weld can be solved well, and horizontal stress of the frame in the process of shocking is dispersed. Meanwhile, by means of the bicycle head tube structure, weld angles between a lower tube and the head tube can be regulated freely, weld fabrication process is reduced, weld fabrication time can be shortened, and production efficiency of a titanium-made bicycle frame is effectively improved and service life is prolonged.

Description

The first tubular construction of bicycle

Technical field

The utility model is about the first tubular construction of a kind of bicycle, and particularly a kind of reducer tee head that adopts hot formed mode to prepare manages.

Background technology

The lightweight of bicycle, high-strength, long life are the targets that numerous bicycle manufacturer chases always.Titanium alloy high-strength light, excellent anti-corrosion performance, especially strength-to-density ratio are higher than magnesium, aluminum alloy, have progressed into bicycle market in recent years, become desirable advanced cycle frame and use material.There are problems such as welded structure is unreasonable, productive costs is high, horizontal poor fatigue properties in the titanium system cycle frame of domestic production at present, and first pipe also becomes the key of decision vehicle frame life-span and cost as topmost load parts in the body frame structure for automotive.

Fig. 1 is the present general-duty structural representation of vehicle head tube voluntarily.This head tubular construction is to adopt machining process on seamless tubular goods, to process two circular holes to obtain, and two circular holes are managed with going up of bicycle respectively and following pipe welds.Fig. 2 is the structural plan scheme drawing that adopts the preceding triangle of cycle frame of present general first pipe welding.Although it is should head tubular construction preparation method simple; But adopt the vehicle frame of this structure welding preparation to have fillet weld; Pipe influences each other even the weld seam fusion with following pipe welding heat affected zone on this moment; Cause this position drawn, compression effort reciprocating, vibrations and be prone to rupture when impacting, become the stressed weak link of bicycle, thus the service life of having reduced bicycle.

Fig. 3 is the structural representation of the head pipe that relates in the Chinese patent (CN2009201544992.4).First pipe is the four-way structure that adopts titanium bar machine up to obtain in this structure, and the required cost of this method is high, stock utilization is low, production efficiency is low.Fig. 4 is the structural representation of triangle before the cycle frame that relates in the Chinese patent (CN2009201544992.4).Though adopting this structure disperses the fillet weld in the ordinary construction; But during the welding of following pipe weldment concentricity and straightness accuracy are required height; And can't be according to distortion adjustment adjustment pipe soldering angle down, weld size low precision, welding efficiency are low, are not suitable for the batch manufacturing of cycle frame.

Summary of the invention

To the above-mentioned existing problems of the first tubular construction of present domestic bicycle, the objective of the invention is to design a kind of rational in infrastructure, first tubular construction that working method is simple, practical.

For realizing above purpose; The utility model provides a kind of driving first tubular construction; Mainly be a kind of reducer tee structure titanium pipe fitting, said first tubular construction is the reducer tee structure, the threeway of extending reducing near position, A end in the seamless tube body 3 with the A B two ends pipe 1 of drawing money on credit; Arm 1 is 45 °～90 ° with the angle of body 3; Near position, B end shape of a saddle hole 2 is set, the elongated end of arm 1 be the C end of threeway be used for cycle frame on manage and captive joint, shape of a saddle circular hole 2 is used for captiveing joint with the following pipe of cycle frame.

The length of the pipe 1 of drawing money on credit in the first tubular construction of above-mentioned titanium bicycle is 30mm～150mm.

Arm 1 diameter can be identical with the diameter of body 3 in the first tubular construction of above-mentioned titanium bicycle, also can be different.

Arm 1 can change with the angle of body 3 in the first tubular construction of above-mentioned titanium bicycle, and its variation range is 45 °～90 °, preferred 60 °～90 °.

The utility model is compared with existing structure and is had the following advantages:

1, mechanical structure is reasonable in design, and first pipe three-port structure rationally disperses weld seam to distribute, and avoids first pipe welding fillet weld to occur, increases substantially bicycle service life;

2, the mode of production is simple, cost is low, is suitable for requirements of mass production;

3, pipe is adjustable with first pipe position soldering angle freedom down, makes things convenient for welding operation and enforcement, has saved weld time, has effectively improved the production efficiency of cycle frame.

Description of drawings

Fig. 1 is the present general-duty structural representation of vehicle head tube voluntarily

Fig. 2 is the structural plan scheme drawing that adopts the preceding triangle of cycle frame of present general first pipe welding

The first tubular construction scheme drawing of Fig. 3 for relating among the CN200920154492.4

Fig. 4 manages the structural plan scheme drawing of the preceding triangle of cycle frame of welding for the head that relates among the CN200920154492.4

Fig. 5 is the utility model design-calculated structural representation of vehicle head tube voluntarily

Fig. 6 is the preceding three-legged structure plan sketch of cycle frame of the first pipe welding of the utility model design-calculated

Description of reference numerals:

1-draws money on credit and manages 2-shape of a saddle circular hole 3-body

The first pipe of the first pipe of the first pipe of 4-5-four-way 6-threeway

The specific embodiment

The first tubular construction of bicycle as shown in Figure 5; It is a kind of reducer tee structure titanium pipe fitting; Adopt near position, A end at seamless titanium tube body 3 and repeatedly to pull out threeway that mouthful mode Heat forming goes out reducing pipe 1 (the long 150mm) that draw money on credit; Adopt the machine up mode to process shape of a saddle circular hole 2 at body 3 near position, B end, arm 1 is 90 ° with the angle of body 3.Pipe welding on the C end of threeway and the cycle frame, shape of a saddle circular hole 2 docks welding with the following pipe of cycle frame, and arm 1 diameter is identical with the diameter of body 3.

The problem of the stress concentration that the conventional vehicle frame head tube position fillet weld that can well solve the first tubular construction of this bicycle causes; Horizontal stress when having disperseed vehicle frame to be shaken; The first tubular construction of this bicycle can freely be adjusted down the soldering angle between pipe and first pipe simultaneously; Shorten welding processing operation and time, the production efficiency and the service life of effectively having improved titanium system cycle frame.

Claims

1. the first tubular construction of a bicycle; It is characterized in that: said first tubular construction is the reducer tee structure; The threeway of extending reducing near position, A end in the seamless tube body with A B two ends (3) pipe (1) of drawing money on credit, arm (1) is 45 °～90 ° with the angle of body (3), near position, B end shape of a saddle hole (2) is set; The elongated end of arm (1) be the C end of threeway be used for cycle frame on manage and captive joint, shape of a saddle circular hole (2) is used for captiveing joint with the following pipe of cycle frame.

2. the first tubular construction of bicycle as claimed in claim 1, it is characterized in that: said bicycle is the titanium bicycle, the material of said pipe fitting is titanium or titanium alloy.

3. the first tubular construction of bicycle as claimed in claim 1 is characterized in that: the threeway of the said reducing pipe (1) of drawing money on credit is repeatedly to pull out mouthful mode Heat forming near the employing of position, A end and go out in seamless tube body (3).

4. the first tubular construction of bicycle as claimed in claim 1 is characterized in that: said shape of a saddle circular hole (2) is to adopt the machine up mode to process at body (3) near position, B end.

5. the first tubular construction of bicycle as claimed in claim 1 is characterized in that: the mode of said captive joint is welding.

6. like the first tubular construction of any described bicycle of claim 1～5; It is characterized in that: adopt near position, A end at seamless titanium tube body (3) and repeatedly pull out threeway that mouthful mode Heat forming the goes out reducing pipe (1) of drawing money on credit; Adopt the machine up mode to process shape of a saddle circular hole (2) at body (3) near position, B end; Arm (1) is α with the angle of body (3), pipe welding on the C end of threeway and the cycle frame, and shape of a saddle circular hole (2) docks welding with the following pipe of cycle frame.

7. the first tubular construction of bicycle as claimed in claim 6, it is characterized in that: the length of said arm (1) is 30mm～150mm.

8. the first tubular construction of bicycle as claimed in claim 6, it is characterized in that: the diameter of arm (1) diameter and body (3) is identical or different.

9. the first tubular construction of bicycle as claimed in claim 6 is characterized in that: arm (1) is 60 °～90 ° with the angle of body (3).