CN2227038Y - Structure improved of bicycle hub - Google Patents
Structure improved of bicycle hub Download PDFInfo
- Publication number
- CN2227038Y CN2227038Y CN 95206290 CN95206290U CN2227038Y CN 2227038 Y CN2227038 Y CN 2227038Y CN 95206290 CN95206290 CN 95206290 CN 95206290 U CN95206290 U CN 95206290U CN 2227038 Y CN2227038 Y CN 2227038Y
- Authority
- CN
- China
- Prior art keywords
- hub
- pearl bowl
- ball bowl
- blade
- groove seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a hub structure of a bicycle, comprising two hub blades and a hollow central tube, wherein, the hub blades are made through the stretching and the punching of a circular plate body, each of the hub blades has a ball bowl slot seat and a pattern disk surface, a ball bowl is formed in a concave way at the center of the ball bowl slot seat, the wall of the ball bowl is attached to the inner side wall of the ball bowl slot seat, the outer wall of the ball bowl slot seat is provided with parallel screw threads, a step surface is formed below the ball bowl slot seat, embossing is hinged with the inner wall of the step surface, and the pattern disk surface is circularly provide with a perforation whose upper end and lower end are provided with chamferings. A hub blade which has high intensity, accurate concentricity of the ball bowl and the hub blade, and easy assembly of a central ingot can be obtained.
Description
The utility model relates to a kind of structure of bicycle drive shaft, refers to a kind of concentricity that improves hub blade and pearl bowl especially, and makes base pipe be easy to the stack-mounted bicycle hub structure.
Bicycle drive shaft is assembled in the wheel hub place, the transmission flower-drum advances to drive wheel by the cooperation of chain and gear, be to know that flower-drum bears great shearing at any time, and flower-drum has forward and backward branch, and both difference then are to have or not screw thread to establish Variable speed fluted disc (the front-wheel constant speed is that monodentate dish, trailing wheel multistage speed are the multistage fluted disc) with spiral shell; With general common flower-drum, its structure on the whole as shown in Figure 1, comprise two hub blade A, two through a hot-cured pearl bowl B and a base pipe C, wherein, pearl bowl B fills in the pearl bowl groove seat A1 of hub blade A by force with ccontaining steel ball, base pipe C then organizes between two hub blade A, and the three is set firmly be integral, but the following shortcoming of the normal appearance of design of this kind separation type and assembling mode:
1, respectively moulding of pearl bowl and hub blade is inserted the pearl bowl in the hub blade again, causes both centrads not good, skew and can't proofreading and correct, insert steel ball again after, then can steel ball or pearl bowl be broken because of shearing is uneven, shorten its service life.
2, the pearl bowl is to fill in firmly in the pearl bowl groove seat of hub blade, makes hub blade and base pipe set firmly again, and not only procedure of processing is numerous and diverse, inconvenient, more expends man-hour.
3, since hub blade can't heat-treat and (fill in for ease of heat-treatment pearl bowl; If this hub blade after heat treatment, the material of its hardening and distortion will cause very big difficult technologies problem to also both fill in fashionablely through hot-cured pearl bowl, and fashionable if implement plug, to very easily cause the pearl bowl to break or be out of shape, and cause concentricity to lose accuracy).So its undercapacity causes the screw thread of rear drum blade easily to burst apart.
4, hub blade needs first punching out one perforation to insert for the pearl bowl when moulding, then needs punching out one perforation to place for wheel shaft during the moulding of pearl bowl, repeats the waste that the punching out perforation causes material, and cost improves relatively.
The utility model is improved at these shortcomings.
The purpose of this utility model is to provide a kind of structure of bicycle drive shaft, can make the concentricity of hub blade and pearl bowl accurate, and have the effect that is easy to assemble base pipe.
Cause above-mentioned purpose for reaching, bicycle drive shaft of the present utility model, comprise two bicycle drive shaft blades and a base pipe, wherein, this bicycle drive shaft blade is to be formed by a circular plate body stretching punching out, and in the end pearl bowl of an one-body molded indent, make the sidewall of pearl bowl and the inwall of bicycle drive shaft blade tip pearl bowl groove seat fit, multiple pearl bowl groove seat bottom in the bicycle drive shaft blade forms a terrace and plugs for base pipe, in the interior then wall of this terrace and the embossing that is hinged, with tight interlock base pipe, and the floral disc face of hub blade and ring are established the perforation of tool chamfering.
The utlity model has following advantage:
1, hub blade and pearl bowl are one-body molded, can effectively simplify procedure of processing and program, and need not repeat punching and do not have the drawback of waste material, have and make advantage easy, saving in material.
2, hub blade and pearl bowl are one-body molded, and both concentricitys are very accurate, also do not cause pearl bowl beat when bearing shearing, break or become flexible, and the good advantage of long service life and safety is arranged.
3, hub blade is heat-treated after thread cutting and articulation embossing again, makes that screw thread is difficult for bursting apart, embossing is not easy to wear, with tool long service life and the good advantage of safety.
4, utilize the embossing of hub blade in-to-in to reach to cause and form friction tight purpose, need not to process separately to dash and establish, simplification, advantage are easily arranged on the package program with fixing with the base pipe end.
Below in conjunction with the drawings and the specific embodiments the utility model is described in further detail.
Fig. 1 is a cutaway view of commonly using product
Fig. 2 is an exploded drawings of the present utility model
Fig. 3 is an assembled sectional view of the present utility model
With reference to Fig. 2, the utility model is a bicycle drive shaft 10, comprises two hub blades 1 and a base pipe 2, wherein:
With reference to Fig. 3, during combination, then get hub blade 1 and be sheathed on base pipe 2 two ends respectively, make the end of base pipe 2 tightly fill in terrace 112 inwalls of hub blade 1, and embossing 113 interlock base pipes, 2 ends of mat terrace 112 inboards and reach and cause flush fit.
Claims (4)
1, a kind of bicycle hub structure, comprise a hub blade (1) and a hollow centre pipe (2) that two stretching punching out form, it is characterized in that: this hub blade (1) is formed by a circular slab body by integral forming, tool one a pearl bowl groove seat (11) and a floral disc face (12), center indent in pearl bowl groove seat (11) forms a pearl bowl (13), makes the wall of pearl bowl (13) and the inwall of pearl bowl groove seat (11) fit.
2, bicycle hub structure according to claim 1 is characterized in that: pearl bowl groove seat (11) the outer wall car of hub blade (1) is shaped on screw thread (111), is the bicycle rear drum.
3, bicycle hub structure according to claim 1 is characterized in that: can form a terrace (112) down in the pearl bowl groove seat (11) of hub blade (1), be provided with embossing (113) in the madial wall of this terrace.
4, bicycle hub structure according to claim 1 is characterized in that: this floral disc face (12) is gone up ring and is established upper and lower side and all have a perforation (121) of chamfering (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95206290 CN2227038Y (en) | 1995-03-27 | 1995-03-27 | Structure improved of bicycle hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95206290 CN2227038Y (en) | 1995-03-27 | 1995-03-27 | Structure improved of bicycle hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2227038Y true CN2227038Y (en) | 1996-05-15 |
Family
ID=33858264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95206290 Expired - Fee Related CN2227038Y (en) | 1995-03-27 | 1995-03-27 | Structure improved of bicycle hub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2227038Y (en) |
-
1995
- 1995-03-27 CN CN 95206290 patent/CN2227038Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |