CN2378278Y

CN2378278Y - Verticle handle-bar stem structure for bicycle

Info

Publication number: CN2378278Y
Application number: CN 99210489
Authority: CN
Inventors: 廖学湖
Original assignee: XINLONG BICYCLE PARTS (SHENZHEN) CO Ltd
Current assignee: XINLONG BICYCLE PARTS (SHENZHEN) CO Ltd
Priority date: 1999-05-13
Filing date: 1999-05-13
Publication date: 2000-05-17
Anticipated expiration: 2009-05-13

Abstract

The utility model relates to a vertical tube structure for bicycles, which comprises a transverse tube and tube clamps on both ends, wherein, a bicycle handle tube is locked tightly by the tube clamp on one end, and a bicycle fork tube is locked tightly by the tube clamp on the other end; the transverse tube is a varying-section tube, a part which is near one end of the bicycle fork tube which is tightly locked forms a circular tube shape, the middle part is an oval after the circular tube is flattened, while a part on the other end which is near the bicycle handle tube which is locked tightly is an ellipse shape after the circular tube is flattened and an opening of the circular tube is widened. A maximum tube diameter of the ellipse shape of the end part of the transverse tube is corresponding to a length of the tube clamps on the end parts. The vertical tube structure for bicycles has the advantages of simple structure, high strength, and more beautiful appearance.

Description

The bicycle profile tube structure

The utility model has related to a kind of bicycle profile tube, is meant the bicycle profile tube structure that can gain in strength and make it associative perception especially.

Standpipe of the prior art comprises transverse tube 1 and is located at the pipe clamp at transverse tube 1 two ends that pipe clamp 2 is used to lock breeches pipe 8 and pipe clamp 3 is used for the lock handle pipe roughly as shown in Figure 1.In this structure, two ends 4,5 horizontal strokes of pipe clamp for outside, not only profile is unbecoming, and easily hook clothing etc., especially this transverse tube 1 meet with the weldering of pipe clamp 3 that E is short, intensity is relatively poor, in addition, outside the standpipe nut 6,7 that has was exposed to, whole pipe clamp 3 water caltrops were too many.

The purpose of this utility model is to provide a kind of bicycle profile tube structure, can strengthen weld strength therebetween widely, and the screw of pipe clamp is covered and outside not being exposed to, and is unlikely that to make pipe clamp form coign too many, thereby can the hook clothing etc.

The purpose of this utility model realizes by the following technical solutions: it comprises the pipe clamp at a transverse tube and two ends thereof, the pipe clamp locking bicycle handle pipe of one end, the pipe clamp locking bicycle branch pipe of the other end, it is characterized in that: described transverse tube is a varying cross-section duct, it is tubular near locking bicycle branch pipe one end parts, centre portion is the ellipse after pipe flattens, and the part of the close locking of other end bicycle handle pipe is the Long Circle after pipe flattens enlarging, and the pipe clamp length of the maximum caliber of transverse tube end Long Circle and its end is suitable.

The utility model compared with prior art has advantage rational in infrastructure, that intensity is high, more attractive in appearance.

Description of drawings of the present utility model is as follows:

Fig. 1 is the scheme drawing of bicycle profile tube in the prior art.

Fig. 2 is a block diagram of the present utility model.

Fig. 3 is the C-C section-drawing of transverse tube among the utility model Fig. 2.

Fig. 4 is the B-B section-drawing of transverse tube among the utility model Fig. 2.

Fig. 5 is the A-A section-drawing of transverse tube among the utility model Fig. 2.

Fig. 6 is the block diagram of another embodiment of the utility model.

Below in conjunction with accompanying drawing the utility model is described in further detail: as shown in Figure 2, the utility model comprises a transverse tube 10 and is connected the pipe clamp 20 and 30 of its two ends 101 and 102 (the described end 101 in another embodiment of Fig. 6 the utility model also can be directly welded in straight-bar 50), the pipe clamp 30 locking bicycle handle pipes 60 of one end, the pipe clamp 20 locking bicycle branch pipes 40 of the other end; Described transverse tube 10 is a varying cross-section duct, its part 103 near locking bicycle branch pipe 40 1 ends is tubular, centre portion 104 is the ellipse of pipe after flattening, and the other end 102 is near the part 105 of locking bicycle handle pipes 60 Long Circle after for pipe flattening enlarging, 105 Long Circles maximum caliber D3 in transverse tube end is greater than centre portion 104 maximum caliber D2, and suitable with pipe clamp 30 length L of its end, welded after described end 102 and pipe clamp 30 curve fittings.Meet E longer because of the contour of transverse tube 10 ends 102 lengthening makes weldering, increase weld strength therebetween widely; The screw 301,302 of pipe clamp 30 is covered by end 102 and outside not being exposed to, and the transverse width of end 102 and pipe clamp 30 are isometric, be unlikely the two ends 301,302 that make pipe clamp 30 and form coign, and constitute a circular arc, can not collude things such as hanging clothing fully with end 102.

Claims

1, a kind of bicycle profile tube structure, the pipe clamp that comprises a transverse tube and two ends thereof, the pipe clamp locking bicycle handle pipe of one end, the pipe clamp locking bicycle branch pipe of the other end, it is characterized in that: described transverse tube is a varying cross-section duct, it is tubular near locking bicycle branch pipe one end parts, centre portion is the ellipse after pipe flattens, and the part of the close locking of other end bicycle handle pipe is the Long Circle after pipe flattens enlarging, and the pipe clamp length of the maximum caliber of transverse tube end Long Circle and its end is suitable.