CN2134346Y

CN2134346Y - Upper bowl without screw thread of bicycle front fork

Info

Publication number: CN2134346Y
Application number: CN 92232198
Authority: CN
Inventors: 纪易成
Original assignee: YUSHENG TRAFFIC MATERIAL AND EQUIPMENT CO Ltd
Current assignee: YUSHENG TRAFFIC MATERIAL AND EQUIPMENT CO Ltd
Priority date: 1992-09-10
Filing date: 1992-09-10
Publication date: 1993-05-26
Anticipated expiration: 2002-09-10

Abstract

The utility model relates to an upper bowl of a bicycle front fork without screw threads. A ring part is formed at a bottom end of a bowl body mainly, and a C-shaped ring part is formed at the top end. Each dummy club with two through holes is arranged on both ends of the C-shaped ring part respectively. The bowl body is caused to be sheathed on a connection tube of a front fork. A screw bolt is screw locked at one through hole of the dummy clubs directly to form tying up and fixing. While the other through hole can be used for penetrating through a brake cable so as to attain the goals of reducing damage and abrasion, increasing functions, and simplifying assemblage.

Description

Upper bowl without screw thread of bicycle front fork

The utility model relates to a kind of bicycle front fork does not have bowl on the screw thread, and particularly a kind of purposes is wide, the bicycle front fork of simple and convenient assembly does not have bowl on the screw thread.

On the existing bicycle front fork bowl in, most popular promptly as shown in Figure 4, it mainly is to attack in simple annular body 20 inside to establish screw thread 21, be provided with the screw thread that matches and take over 30 outsides in front fork, make body 20 and front fork take over 30 spiral shells again and form locking condition admittedly, wherein, get loose for avoiding body to rotate, so again on body 20 in regular turn screw lock one packing ring 22 with tighten firmware 23, make packing ring 22 and tighten firmware 23 and combine closely with body; Yet the structure design of bowl is perfect not to the utmost on this existing bicycle front fork, and have following shortcoming: attacking to establish when screw thread makes worker increases, and not only raises the cost, and also causes stack-mounted inconvenience; Bowl must be attacked in the inwall of body 20 and established screw thread 21 on the existing bicycle front fork, establishes screw thread and expends man-hour and attack, thereby cost is increased; Body 20 and front fork must be taken over 30 when it is assembled again and screw togather, and the general bowl about 5～6cm of body 20 external diameters that goes up rotates so must entangle body 20 with large-scale spanner, yet when spanner is pulled,, also cause body 20 and front fork tube 30 thread failure if the application of force is improper; In addition, the ball grooves of body 10 bottoms is in order to form the Rong Zhu space with last bowl plug 42, yet, body 10 locks in the screw lock mode, and because of there being the pitch of thread poor between the screw thread, when body 10 spiral shells admittedly after regular meeting produce ball grooves and can't be just accord with last bowl plug 42, and cause Rong Zhu space span difference everywhere, ball comes off easily, maybe can produce the phenomenon of being obstructed; So existing structure is except that the manufacturing cost height, thereby and also influences the ball action and influence safety operation control.

Main purpose of the present utility model is: provide a kind of simple in structure, low and the simple and convenient assembly of cost, the bicycle front fork that is difficult for worn-out surface does not have bowl on the screw thread, it is to form an annulus portion in bowl body bottom that described bicycle front fork does not have on the screw thread bowl, the top forms C type ring portion, and respectively establish the lug of a tool two perforation in C type ring portion two ends, making a bowl body be sheathed on front fork takes over, directly in a perforation screw lock bolt of lug, can form tighten fixing, so can improve existing screw lock mode and be obstructed, and must rotate whole bowl body with large-scale spanner and cause disappearances such as assembling inconvenience because of pitch of thread difference causes the different consequently balls of the span rolling everywhere of Rong Zhu space.

The utility model provides a kind of bicycle front fork not have bowl on the screw thread, it is characterized in that: bowl body lower part forms down ring portion, and the first half forms C shape ring portion; It is formed with an annular groove in ring portion top down, and the bottom is formed with a guide groove; And C shape ring portion two ends form a lamellar body respectively, and are equipped with lug on the lamellar body, and the one lug is provided with fish eyelet, and another lug is provided with tapped bore.

Bicycle front fork of the present utility model does not have on the screw thread in the bowl, is provided with a perforation between described two lugs.

The utlity model has the following points advantage:

1. screw togather the bowl body 10 that the formula mode engages with non-, can be just accord with last bowl plug and be adjacent to, make steel ball have suitable leading to move the space, can avoid the steel ball activity not good, easily the worn-down disappearance.

2. simple in structure, easy to manufacture, simple and convenient assembly: the first half that the utility model bicycle front fork does not have the bowl body 10 of bowl on the screw thread forms C shape ring portion 12, and in the lug 14 of C shape ring portion two tool tapped bore 16 of 12 formation or fish eyelet 15, in tapped bore 16 and fish eyelet 15 locking bolts 18, can easyly finish assembling apace; In addition it is simple in structure, casting easily, and short and small tapped bore 16 also forms easily, so effective cost-cutting.

3. bicycle front fork of the present utility model does not have on the screw thread lug 14 in the bowl through particular design and the effect of tool frame line, can improve existing must establish the frame line apparatus in addition and the too much disappearance of the member that produces; According to the utility model, establish a perforation 17 14 of two lugs, making its existing position that protrudes out can be a design cleverly for the usefulness that wears brake cable 31 in fact.

Further specify architectural feature of the present utility model and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 does not have the three-dimensional appearance scheme drawing of bowl on the screw thread for the utility model bicycle front fork.

Fig. 2 does not have the generalized section of bowl on the screw thread for the utility model bicycle front fork.

The running condition that Fig. 3 does not have on the screw thread bowl for the utility model bicycle front fork had both made up to cut open shows scheme drawing.

Fig. 4 showed scheme drawing for the running condition of bowl on the existing bicycle front fork has both made up to cut open.

Please referring to Fig. 1, shown in Figure 2, it mainly is to form ring portion 11 under the annular that a top has annular groove 110, bottom tool guide groove 111 at annular bowl body 10 lower parts that the utility model bicycle front fork does not have on the screw thread bowl, annular groove 110 can supply sheathed water proof ring 41, then form C shape ring portion 12 in the top, wherein, C shape ring portion 12 two ends form the lamellar body 13 of projection respectively, these two lamellar bodies, 13 ends are close mutually, be equipped with the lug 14 of a projection on it, one lug 14 is provided with

fish eyelet

15,14 of another lugs are provided with tapped bore 16, can supply screw lock bolt 18; In addition, be provided with a perforation 17, can wear for brake cable in two lugs 14 and the place of closing.

Please referring to Fig. 2, shown in Figure 3, when the utility model combination and use, be earlier water proof ring 41 to be placed in annular groove 110, again front fork is taken over 30 and be arranged in bowl plug 40, and steel ball 19 placed a bowl plug bowl inside, 40 top, again bowl body 10 is placed in front fork and takes over 30, make guide groove 111 and 40 formation one of last bowl plug lead the space and move flexibly for steel ball 19; Again in fish eyelet 15 and tapped bore 16 screw lock bolts 18, make and contract in two lamellar bodies 13 and grip front fork and take over 30; Again with a packing ring 22 with tighten firmware 23 and be fixed at stem in regular turn, and on the packing bowl body 10, mat tightens firmware 23 and pushes against bowl body 10, thereby can prevent that bowl body 10 from coming off, and bowl body 10 does not have the pitch of thread poor, so can not be obstructed because of pitch of thread difference causes the rolling of ball because of no screw thread at this moment; In addition, brake cable 31 17 can be worn from boring a hole, brake cable 31 is located.

It mainly is to form the circle ring portion in bowl body bottom that the utility model bicycle front fork does not have on the screw thread bowl, and in top formation C type ring portion, and be matched with the lug that C type ring portion forms tool two perforation, make its formation urge the form of tightening, simple and convenient assembly not only, and, can avoid taking place because of the situation that pitch of thread difference causes screw lock to be difficult for and the ball action is obstructed.

Claims

1, a kind of bicycle front fork does not have bowl on the screw thread, it is characterized in that: bowl body lower part forms down ring portion, and the first half forms C shape ring portion; It is formed with an annular groove in ring portion top down, and the bottom is formed with a guide groove; And C shape ring portion two ends form a lamellar body respectively, and are equipped with lug on the lamellar body, and the one lug is provided with fish eyelet, and another lug is provided with tapped bore.

2, bicycle front fork according to claim 1 does not have bowl on the screw thread, it is characterized in that: be provided with a perforation between two lugs.