CN2297585Y - Main axle for bicycle - Google Patents

Abstract

The utility model relates to a main axle for bicycles, which comprises a five-way pipe, a sleeve pipe, an axle center, ball bearings and threaded rings. The inner part of the five-way pipe is provided with the sleeve pipe and the axle center, the both ends of the axle center are respectively sheathed with a ball bearing, and the threaded rings are screwed on the axle center, so that the axle center combines with the sleeve pipe. The inner side of one end of the five-way pipe is provided with screw thread, and an inner edge of the other end of the five-way pipe is provided with a conical surface. The external side of one end of the sleeve pipe is correspondingly provided with screw thread, and the other end is also correspondingly provided with a conical surface. The sleeve pipe can be easily arranged in the five-way pipe, and is fixed on the five-way pipe through the mutual screw connection of the screw thread. The utility model has the advantages of few components, convenient operation, no need of correction, time saving, labor saving and low cost.

Description

Bottom bracket bearing of bicycle

The utility model is about a kind of bottom bracket bearing of bicycle.

In recent years the development of industry changes comprehensive considering into by simple manufacturing industry guiding, consumer-oriented of past, should consider the convenience that the Consumer uses, also to consider the overall technology and the cost of manufactory, even to note peddling the demand of link, and the environmental issue that consumes the back all will comprehensively assess, and the utility model promptly under this overall situation, is analyzed the disadvantages of existing bottom bracket bearing of bicycle structure, after integrating, will improve the main force and focus on the industry manufacturing package technique.That is, the technical field of the utility model is the manufacturing assembling in the bottom bracket bearing of bicycle structure.

Be welded on the car body owing to the five-way piping now, so combination of whole main shaft group, all must all on car body, carry out, but under the industrial division system, the spare part manufacturing of main shaft part and the assembly of car body system divide industry manufacturing, promptly, with present bottom bracket bearing of bicycle manufacturing industry and car body assembly depot interactive relationship between the two, at first, the manufacturer is after producing the main shaft group according to depot's pilot block system, deliver to depot after will packing again, be assembled in the five-way pipe on the car body by depot again.

And, the main shaft structure that is used for bicycle, its composite construction is as the above the product of commonly using of Fig. 3 in early days, be to comprise five-way pipe 6, sleeve pipe 7, axle center 3, ball bearing (being its steel ball shown in the figure) 4 and blind nut 9, wherein axle center 3 is provided with pearl rail 31, the inboard, nearly two ends of five-way pipe 6 then is provided with screw thread 61,62, and side is provided with pearl bowl 91 within the blind nut 9, the sheathed sleeve pipe 7 in 3 stage casings, an axle center during combination and ball bearing (being illustrated as steel ball) 4 is respectively overlapped at nearly two ends, and insert in the five-way pipe 6 and and be arranged in (the pearl bowl 91 of blind nut 5 is supporting steel ball 4) on the axle center 3, and must make two ends all be rotated with appositely simultaneously could make putting in order and organize the main shaft tectonic association on five-way pipe 6 with blind nut 9 collocation ring sets 34.But, because five-way pipe 6 is to be welded on the car body, so the combination of whole main shaft group, all must all on car body, carry out, and comprise that the flank of tooth angle of proofreading and correct the speed change gear make large fluted disc group and trailing wheel maintains the operation within the permission angle, but way so but there is following shortcoming:

1, assembly manipulation difficult and time-consuming, take a lot of work; Depot needs the accent of tool high degree of skill and rich experiences

The school master just can make the two ends assembling average and accurate;

2, axial group semi-finished product reject ratio height; Angle is proofreaied and correct by depot can't reach requirement as finding, then

Whole axial group is return main shaft manufactory; Depot then is in assembled state to be expected, and main shaft

Manufactory then remakes;

3, whole manufacture cost is high; Main shaft manufactory dismantles the axle center earlier during recasting, remakes again

The axle center is to meet the requirements; No matter depot or main shaft manufactory all suffer heavy losses.

4, QC cost height; Under high-quality requirement, often need the dismounting axial group to recombinate waste again

Man-hour and cost;

5, finished product reject ratio height; Unequal as two ends assemblings, during use the axle center can produce rock with

Beat;

6, occurrences in human life burden weight and risk are high; Depot still needs the establishment of normality to transfer under no order status

School master, and cause the raising of cost of production virtually, and if the adjustment master once leaving office

, then this production line promptly is the state of stopping, and has a strong impact on the work manufacturing schedule, and this is a car

The problem that inter-plant is had a headache most.

So, someone proposes structure as shown in Figure 4, its be with set up a sleeve pipe 7 and two fixedly the form of ring cowling 8 solve the problem of fit on, making it can organize good whole again assembling outside car body gets on, promptly shown in Figure 4, be the existing more representative person of bottom bracket bearing of bicycle structure, it is to comprise five-way pipe 6, sleeve pipe 7, axle center 3, ball bearing (being its steel ball shown in the figure) 4, volution 5 reaches fixedly ring cowling 8, wherein axle center 3 is provided with pearl rail 31, the inboard, nearly two ends of this five-way pipe 6 then is provided with screw thread 61,62, and side is provided with pearl bowl 71 within the sleeve pipe 7,72, and fixedly the outside, ring cowling 8 ends is provided with screw thread 81, a ball bearing (being illustrated as steel ball) 4 is respectively overlapped at 3 nearly two ends, axle center during combination, sleeve pipe 7 also is arranged in (the pearl rail 51 of volution 5 is supporting steel ball 4) on the axle center 3 with volution 5 collocation packing rings 32 and pad 33, with axle center 3 and sleeve pipe 7 combinations.And during 6 combinations of itself and five-way pipe, be earlier sleeve pipe 7 and axle center 3 to be inserted earlier in the five-way pipe 6, again with two fixedly ring cowling 8 be placed in respectively simultaneously near interior 3 two ends, axle center of five-way pipe 6, and with two fixedly the screw thread 81 of ring cowling 8 be screwed together in the screw thread 61,62 of five-way pipe 6 simultaneously, and must make two ends all be rotated with appositely could making whole group main shaft tectonic association on five-way pipe 6.

But way so but because of increasing by two fixing ring cowlings 8, and still has following shortcoming:

1, assembly increases; Be by three-member type (sleeve pipe 7 add two fixedly ring cowling 8) the waste goods, materials and equipments

And increase cost;

2, manufacturing process is also more; Many systems two are ring cowling 8 fixedly;

3, assembly storage and transportation space and cost all increase;

4, the money overall cost increases;

5, the environmental protection that adds because of engineering (society) cost also increases;

6, the assembling formality is also more numerous and diverse, and makes location, axle center 3 earlier, and just spiral shell is consolidated two fixing spiral shells smoothly

Lid 8.

The purpose of the utility model promptly is for a kind of bottom bracket bearing of bicycle, to have the minimizing assembly, operates simple and easy, non-regulating, saves time, saving of labor and the effect that reduces cost.

For reaching above-mentioned purpose, the utility model comprises five-way pipe, sleeve pipe, axle center, ball bearing and volution, wherein establish sleeve pipe and axle center in the five-way pipe, a ball bearing is respectively overlapped at nearly two ends, this axle center, and be arranged on the axle center and with axle center and sleeve combination, one of five-way pipe end inboard is provided with screw thread with volution, the other end inner edge then is provided with stopping surface, sleeve pipe one end outside correspondence is provided with screw thread, and the other end also correspondence is provided with stopping surface; Thus, sleeve pipe can be inserted in the five-way pipe easily, and screws togather mutually and be fixed on the five-way pipe with screw thread.

The stopping surface of the utility model five-way pipe and the stopping surface of the sleeve pipe system conical surface in correspondence with each other.The stopping surface of five-way pipe is the less conical surface of the bigger and inner bore of outer end bore, and the stopping surface of sleeve pipe then is the conical surface of the stopping surface moulding of corresponding five-way pipe.The stopping surface of five-way pipe also can be the bigger conical surface of the less and inner bore of outer end bore, and the stopping surface of sleeve pipe then is the conical surface of the stopping surface moulding of corresponding five-way pipe.

After adopting said structure, the utility model is provided with screw thread in one of its five-way pipe end inboard, the other end inner edge then is provided with the conical surface, sleeve pipe one end outside correspondence is established screw thread, the other end also correspondence is provided with the conical surface, and sleeve pipe can be inserted in the five-way pipe easily in addition, and screws togather mutually and be fixed on the five-way pipe with screw thread, and have that assembly operation is simple and easy, non-regulating, save time, saving of labor, convenience, and the effect that reduces assembly, reduces cost.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is combination (analysing and observe) figure of the utility model example one;

Fig. 2 is combination (analysing and observe) figure of the utility model example two;

Combination (analysing and observe) figure of product commonly uses in Fig. 3 system;

Combination (analysing and observe) figure of product two commonly uses in Fig. 4 system.

As shown in Figure 1, it is the utility model example one, comprise five-way pipe 1, sleeve pipe 2, axle center 3 ball bearings (being its steel ball shown in the figure) 4 and volution 5, wherein axle center 3 is provided with that side also is provided with pearl bowl 23,24 within pearl bowl 31, the sleeve pipe 2, one of five-way pipe 1 end inboard is provided with screw thread 11, the other end inner edge then is provided with the conical surface of using as stopping surface 12, and sleeve pipe 2 one ends outside correspondence is provided with screw thread 21, and the other end also correspondence is provided with the conical surface of using as stopping surface 22; Mat it, sleeve pipe 2 can be inserted in the five-way pipe 1 easily, and is screwed together in mutually and is fixed on the five-way pipe 1 with screw thread 11,21; Promptly, a ball bearing (being illustrated as steel ball) 4 is respectively overlapped at 3 nearly two ends, axle center during combination, sleeve pipe 2 and arrange in pairs or groups packing ring 32 and pad 33, and be arranged in (the pearl bowl 51 of volution 5 is supporting steel ball 4) on the axle center 3 with volution 5, make axle center 3 and sleeve pipe 2 combinations, then sleeve pipe 2 and axle center 3 are inserted earlier in the five-way pipe 1 at last, screw togather mutually with screw thread 11,21 again, support positioning instant mutually until two conical surfaces 12,22 and fix.

Again, in example one, the conical surface 12 is that bore bigger and inner bore in outer end is less, the then corresponding conical surface 12 of the conical surface 22 and designing, and the direction of its assembling is to insert combination by the drawing left end to right-hand member.

The utility model example second as shown in Figure 2, it still comprises five-way pipe 1, sleeve pipe 2, axle center 3, ball bearing (being its steel ball shown in the figure) 4 and volution 5, wherein axle center 3 is provided with pearl bowl 31, side also is provided with pearl bowl 23,24 within the sleeve pipe 2, screw thread 11 is established in one of five-way pipe 1 end inboard, the other end inner edge then is provided with the conical surface of using as stopping surface 12, and sleeve pipe 2 one ends outside correspondence is provided with screw thread 21, and the other end also correspondence is provided with the conical surface of using as stopping surface 22; Mat it, sleeve pipe 2 can be inserted in the five-way pipe 1 easily, and is screwed together in mutually and is fixed on the five-way pipe 1 with screw thread 11,21; Promptly, a ball bearing (being illustrated as steel ball) 4 is respectively overlapped at 3 nearly two ends, axle center during combination, sleeve pipe 2 and arrange in pairs or groups packing ring 32 and pad 33, and be arranged in (the pearl bowl 51 of volution 5 is supporting steel ball 4) on the axle center 3 with volution 5, make axle center and sleeve pipe 2 combinations, then sleeve pipe 2 and axle center 3 are inserted earlier in the five-way pipe 1 at last, screw togather mutually with screw thread 11,21 again, support positioning instant mutually until two conical surfaces 12,22 and fix.

Again, the conical surface 12 is that bore less and inner bore in outer end is bigger in example two, the then corresponding conical surface 12 of the conical surface 22 and designing, and the direction of its assembling is to insert combination by the drawing right-hand member to left end.This partly is the difference of the utility model example two and example one.

Claims (4)

1, a kind of bottom bracket bearing of bicycle, comprise five-way pipe, sleeve pipe, axle center, ball bearing and volution, wherein establish sleeve pipe and axle center in the five-way pipe, a ball bearing is respectively overlapped at nearly two ends, this axle center, and be arranged on the axle center and with axle center and sleeve combination, be primarily characterized in that with volution: one of five-way pipe end inboard is provided with screw thread, and the other end inner edge then is provided with stopping surface, sleeve pipe one end outside correspondence is provided with screw thread, and the other end also correspondence is provided with stopping surface.

2, bottom bracket bearing of bicycle according to claim 1 is characterized in that: the stopping surface of five-way pipe and the stopping surface of the sleeve pipe system conical surface in correspondence with each other.

3, as the bottom bracket bearing of bicycle as described in the claim 2, it is characterized in that: the stopping surface of five-way pipe is the less conical surface of the bigger and inner bore of outer end bore, and the stopping surface of sleeve pipe then is the conical surface of the stopping surface moulding of corresponding five-way pipe.

4, as the bottom bracket bearing of bicycle as described in the claim 2, it is characterized in that: the stopping surface of five-way pipe is the bigger conical surface of the less and inner bore of outer end bore, and the stopping surface of sleeve pipe then is the conical surface of the stopping surface moulding of corresponding five-way pipe.

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