CN2256395Y

CN2256395Y - An improved combined structure of bicycle handlebar riser and front fork

Info

Publication number: CN2256395Y
Application number: CN 95227919
Authority: CN
Inventors: 陈胜伦
Original assignee: Taiyakangpei Co ltd
Current assignee: Taiyakangpei Co ltd
Priority date: 1995-11-07
Filing date: 1995-11-07
Publication date: 1997-06-18
Anticipated expiration: 2005-11-07

Abstract

The improved handlebar stem and front fork combined structure for bicycle has stem assembly inserted inside the stem, and the stem assembly has one stage part capable of being abutted to the pressure regulating bundle in the top of the stem to make the pressure regulating bundle produce downward pressure to fix the upper bowl bearing assembly in the correct position.

Description

The bicycle handle bar's standpipe and the front fork unitized construction of improvement

The utility model is about a kind of bicycle handle bar's standpipe and front fork unitized construction of improvement, and wherein (1) standpipe of front fork does not have screw thread; (2) stem insert in the standpipe of front fork and its be provided with one the stage portion to push down pressure adjustment bundle sub-component, this pressure adjustment bundle sub-component comprises that one has the awl circle of breach, it is two conical surfaces up and down, the conical surface that last cone match is adjusted Shu Zi will descend the conical surface to be pressed into the upward interior same gradient conical surface of bowl lid of first bowl of group of car simultaneously downwards to produce suitable pressure, so that fix vertical centre, remove unnecessary gap, so the bearing of the first bowl group of car could smoothly rotate.According to structure of the present utility model, can reduce a lot of screw thread processing and weld, cost-cutting increases degree of safety, and simplifies assembling process, reduces the instrument that needs usefulness.

The bicycle handle bar's standpipe commonly used and front fork unitized construction roughly have following three kinds of structures:

Structure I: wherein standpipe of front fork has external screw thread, and the negative thread that same size is radially arranged in the bowl lid of head bearing, the upper end of bowl lid is arranged with the nut with negative thread of same size again, loosening to compeling to prevent bearing set with this two female threaded member, stem inserts to get in the standpipe of front fork and is not urged to bearing set or nut.

Structure I I: wherein standpipe of front fork has external screw thread, covers two on the nut that end is equiped with same size negative thread at top cup, and is loosening to compeling to prevent bearing set with this two nut, and stem inserts in the standpipe of front fork but is not urged to bearing set or nut.

Structure III: as US Patent the 5th, 095, No. 770, wherein standpipe of front fork does not have external screw thread, in the bowl lid of head bearing, radially be provided with a conical surface, wherein be equiped with same gradient and unidirectional awl circle jaggy after, put stem again, cooperate the external screw thread of vertical tube top top cover to form the handle riser of delaying unloading below the packing assembly on the negative thread that is provided with in the vertical tube top then, make the first bowl group of car produce suitable pressure.

Yet the above-mentioned structure of commonly using has following shortcoming:

1. structure I and II: want thread cutting and two big nuts of will arranging in pairs or groups because of standpipe of front fork, cause manufacturing cost to increase, threaded tube wall strength reduces simultaneously.And when assembling is adjusted, to use very large-sized open-end spanner, so the skilled worker that need be skilled in technique (as from the garage shop) could adjust pressure.

2. structure III: the socket stem is welding job and processing a lot, and cost is higher.Also instrument especially of sheathed top cover with external screw thread makes the assembling repair operational difficulties and the cost height in the standpipe of front fork.

For overcoming above-mentioned many disappearances of commonly using structure, the applicant is concentrate on studies a kind of bicycle handle bar's standpipe and front fork unitized construction of improvement.Therefore the purpose of this utility model is to provide a kind of bicycle handle bar's standpipe and front fork unitized construction of improvement.

In the bicycle handle bar's standpipe and front fork unitized construction of improvement provided by the utility model, stem inserts in the standpipe of front fork, this standpipe be a up big and down small formation have one the stage portion, this, portion can be tight against the upper surface of adjusting card at the pressure at standpipe of front fork top in stage, so that pressure adjustment bundle produces the pressure that transmits downwards, in this, be provided with a ligule pipe again below the bottom of pipe, the top of this ligule pipe also is provided with and should interiorly manages the inclined-plane that the inclined-plane, bottom cooperates, and the top of this ligule pipe also is provided with and should interiorly manages the inclined-plane that the inclined-plane, bottom cooperates, and this ligule pipe bottom is provided with a tapped bore, make when the assembling stem is in standpipe of front fork, can penetrate and be screwed in this ligule pipe from its face end by a bolt, and when this bolt of precession, produce that deflection moves and the relative side that makes standpipe and ligule pipe produces the packing effect with the inwall of standpipe of front fork respectively by the inclined-plane of the inclined-plane of ligule pipe and standpipe bottom, so make stem be positioned in the standpipe of front fork and with it tight joint to reach axial and radial location.

Stem in the said structure also can not have one the stage portion, and screw thread is set to screw togather with a jam nut in the outside face appropriate location of standpipe, make when combination vehicle handle riser during in standpipe of front fork, this jam nut can be tight against pressure adjust on the Shu Zi and performance as above-mentioned embodiment the standpipe stage portion function.

Again, but ligule pipe lower end also car system one circular groove make ligule pipe and standpipe of front fork inwall produce resistance with installing O shape ring, so can be when fixing stem generation one to the strength that presses down to reduce the gap of whole cup group assembly.

According to said structure of the present utility model, (1) because the screw thread and the weld of stem are less, so easy to manufacture, cost is lower; (2) because stem is a plug-in type, to stretch out vehicle head tube many so standpipe of front fork can not need, so the standpipe of front fork of its highly can be more aforementioned known structure III is lacked; (3) the utility model does not need to use as structure I, and II large scale open-end spanner does not need other speciality tools with the top cover with external screw thread in the standpipe of front fork of implant infrastructure III yet, need only can assemble adjusting work with the hex spanner of generally commonly using; And (4) welding of stem and standpipe of front fork and car system position are minimum, thereby, increase component strength widely.

For making for the purpose of structure of the present utility model and advantage be easier to understand, the applicant will cooperate following accompanying drawing to illustrate in further detail:

Fig. 1 is the three-dimensional exploded view of an embodiment of the present utility model;

Fig. 2 is the assembled sectional view of the structure of Fig. 1, wherein shows the state that the bolt of stem assembly is not screwed as yet;

Fig. 3 is the assembled sectional view of Fig. 1 structure, wherein shows the state that the bolt of stem assembly is screwed;

Fig. 4 is the three-dimensional exploded view of another embodiment of the present utility model;

Fig. 5 is the assembled sectional view of Fig. 4 structure.

See also Fig. 1 and Fig. 2, stem of the present utility model and front fork unitized construction are mainly by a standpipe of front fork 10, once bowl bearing assembly 40, a water proof ring 50, a pressure adjustment bundle sub-component 60 and a stem assembly 80 are formed on bowl bearing assembly 20, the vehicle head tube 30.Wherein this stem and front fork unitized construction and array mode thereof will be described in detail as follows:

This following bowl bearing assembly 20 comprises: once bulb stopper 21, once pearl nest 23 and bowl 24 once, this assembly is sheathed on the bottom of this standpipe of front fork 10 with being combined in regular turn according to the order of said elements.

The top sub-fraction that this standpipe of front fork 10 penetrates from the bottom of vehicle head tube 30 and vehicle head tube 30 is only stretched out on its top then.

Should go up a bowl bearing assembly 40 comprises: bulb stopper 44 on the pearl nest 42 and on the bowl 41, on.This assembly also is combined in the top of vehicle head tube 30 in regular turn according to the order of said elements.This water proof ring 50 and pressure are transferred bundle sub-component 60 (comprising awl circle 61 and pressure adjustment bundle 62 with breach), and it also is placed on this above bowl bearing assembly 40 in regular turn.

What must illustrate herein is, the following bowl bearing assembly 20 of above-mentioned standpipe of front fork 10, vehicle head tube 30, last bowl bearing assembly 40, a water proof ring 50, the awl circle 61 with breach and pressure adjustment bundle 62 all belong to the known member that bicycle uses, non-feature of the present utility model is not so intend its detailed structure and effect are added narration in the utility model.

This stem assembly 80 comprises: a ligule pipe 81, a stem 82, one leading pipe close 83 and a bolt 84.Wherein, this tap pipe close 83 has a central perforation 831 and is installed on the top of this stem 82.These stem 82 bottoms are an inclined-plane 823.81 of this ligule pipes are positioned at this stem 82 belows, and its top is provided with the inclined-plane 811 that cooperates with this inclined-plane, standpipe bottom 823; Its bottom is provided with a tapped bore 812 again.Lower end car system one cannelure 814 of this ligule pipe 81 can be in order to settle an O type ring 815.It is after 80s by bolt 84 is penetrated and pass stem 82 and the tapped bore 812 of ligule pipe 81 below stem 82 is screwed on (but bolt does not screw as yet) and combine the stem assembly from the central perforation 831 of tap plug 83, again the stem assembly is restrainted sub 62 tops from the pressure adjustment and insert in the standpipe of front fork 10 in the vehicle head tube 30, the stage portion on the stem 82 822 can be resisted against on pressure adjustment bundle 62 at this moment.Again after the height of determining stem, just bolt 84 can be screwed, and it is mobile by the inclined-plane 811 of ligule pipe 81 with the inclined-plane 823 generation deflections of stem 82 bottoms, so that the relative side of standpipe 82 and ligule pipe 81 produces the packing effect with the inwall of standpipe of front fork 10 respectively, and then make stem 82 be positioned in the standpipe of front fork 10 and tight joint (seeing also Fig. 3) with it.After this, utilize bolt 63 bolts tight pressure adjustment bundle 62 again, then can finish unitized construction of the present utility model.In addition because the rotation of bolt 84, the stage, portion 822 can be tight against pressure adjustment bundle 62, make its produce pressure of transmitting downwards with the fixing bowl bearing of going up on the tram.Again, ligule pipe 81 lower ends can make this ligule pipe 81 and standpipe of front fork 10 inwalls produce resistance owing to have O type ring, so can be when fixing stem, generation one to the strength that presses down to reduce the gap of whole cup group assembly.

The height of handle riser then can unscrew

bolt

84 and 63 earlier if will shunt, and with after standpipe 82 pull-ups, places the height that pad (not being shown among the figure) is reached required stem on pressure adjustment bundle 62 again,

screws bolt

84 and 63 again and gets final product.

See also Fig. 4 and Fig. 5, it shows another embodiment of the utility model stem and front fork unitized construction, the structure of this embodiment except that the stem assembly with slightly different shown in Fig. 1～3, remainder is then all identical.Therefore, hereinafter only the stem assembly of this Fig. 4 and Fig. 5 is illustrated.

The stem assembly 80 ' of Fig. 4 and Fig. 5 is made up of a jam nut 85, a ligule pipe 81, stem 82 ' and a bolt 84.With the stem assembly 80 of Fig. 1～Fig. 3 in comparison, stem 82 ' herein there is no one the stage portion 822, but the surperficial appropriate location of standpipe 82 ' is provided with screw thread 824, can combine with jam nut 85.Stem stage portion's effect of 822 in the similar Fig. 1 of effect～3 of this locking female 85.Be similar to the array mode of Fig. 1 structure, during combination, bolt 84 still is to pass stem 82 ' and screw togather with ligule pipe 81, jam nut 85 then is screwed on to form stem assembly 80 ' with the screw thread 824 of standpipe 82 ', then this stem assembly 80 ' being restrainted sub 62 tops from the pressure adjustment inserts downwards in the standpipe of front fork 10, wherein this jam nut 85 can be resisted against on pressure adjustment bundle 62, after this moment jam nut 85 being screwed, again bolt 84 is screwed, and sub 62 bolts 63 are restrainted in the pressure adjustment screwed just and can finish combination.

When desire was adjusted the stem height of Fig. 4 structure again, only need lean on jam nut 85 to finely tune the height of stem and do not need needed the increase and decrease of back cushion sheet to adjust the stem height as the structure of Fig. 1.

The utility model promptly is made of said elements, can avoid the shortcoming of commonly using structure described in the background technology fully, and not only easy to manufacture, assembly is easy, and can obtain firm integral structure.

Claims

1. An improved bicycle handlebar riser and front fork combination structure, mainly including: a front fork riser, a lower bowl bearing assembly, a bicycle head tube, an upper bowl bearing assembly, a waterproof ring, including a pressure adjustment The pressure adjustment bundle sub-assembly of the bundle and a cone with a notch and a handlebar stem assembly, wherein the lower bowl bearing assembly is sleeved on the bottom end of the front fork stem tube, and the front fork stem tube is formed from the bottom end of the head tube Inserted and accommodated in the head tube, the upper bowl bearing assembly, the waterproof ring and the pressure adjustment bundle subassembly are sleeved on the top of the head pipe in sequence, and the handlebar riser assembly is assembled from the top of the pressure adjustment bundle subassembly Set in the front fork vertical tube; it is characterized in that:

The handlebar stem assembly includes: a handlebar stem, a faucet plug with a central perforation and installed on the top of the handlebar stem, a tongue tube and a bolt located below the handlebar stem, wherein the The standpipe is formed with a large upper part and a lower part with a stage part, and the bottom end of the standpipe is a slope; the top of the tongue-shaped pipe is provided with a slope that cooperates with the slope at the bottom end of the standpipe, and a threaded hole is provided at the bottom; and

The lower end of the tongue-shaped tube can be provided with an annular groove to place an O-ring, so that the tongue-shaped tube and the inner wall of the front fork stem tube can generate resistance, so that some downward force can be generated when fixing the handlebar stem tube To reduce the clearance of the whole bearing assembly.

2. The improved combined structure of bicycle handlebar riser and front fork as claimed in claim 1, wherein the height can be adjusted by placing spacers on the pressure adjustment bundle.

3. The improved combined structure of bicycle handlebar riser and front fork as claimed in claim 1, wherein the handlebar riser assembly can also consist of a handlebar standpipe, a tongue-shaped handlebar stand below the handlebar standpipe Tube, a lock nut and a bolt; the handlebar riser does not have a stage, and a thread is provided at an appropriate place in the riser to be screwed with the lock nut, and the bolt penetrates from the top of the riser and connects with the The tongue tubes are threaded together to form the handlebar stem assembly, and when the handlebar stem assembly is inserted into the fork stem tube, the locknut will abut against the pressure adjustment beam.