CN113070636A - Split type bicycle hub ratchet wheel and preparation method thereof - Google Patents
Split type bicycle hub ratchet wheel and preparation method thereof Download PDFInfo
- Publication number
- CN113070636A CN113070636A CN202010009742.6A CN202010009742A CN113070636A CN 113070636 A CN113070636 A CN 113070636A CN 202010009742 A CN202010009742 A CN 202010009742A CN 113070636 A CN113070636 A CN 113070636A
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- ratchet wheel
- ratchet
- cylinder
- bicycle hub
- processing
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 16
- 238000003754 machining Methods 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000009713 electroplating Methods 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 238000010273 cold forging Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a split type bicycle hub ratchet wheel and a preparation method thereof, wherein the split type bicycle hub ratchet wheel comprises a ratchet wheel cylinder and a ratchet wheel tooth disc seat connected with the ratchet wheel cylinder, wherein the ratchet wheel cylinder is designed into a cylinder structure; the ratchet tooth plate seat structure is a metal member. The bicycle hub ratchet wheel provided by the invention can ensure that the ratchet is not damaged, simplify the production process, reduce the production cost, improve the coaxiality precision grade of the ratchet wheel, reduce the weight of the ratchet wheel and change ratchet wheel bodies with different specifications in production.
Description
Technical Field
The invention relates to a bicycle hub ratchet wheel and a preparation method thereof, in particular to a split type bicycle hub ratchet wheel and a preparation method thereof.
Background
Bicycles have variable speed vehicles or non-variable speed vehicles, which have different hub structures, and usually a ratchet structure in a hub of the variable speed vehicle is provided with a ratchet barrel for mounting a variable speed sprocket.
The ratchet wheel design of the variable speed bicycle has all adopted an integral design so far, that is, a ratchet wheel barrel and ratchet wheel teeth in the ratchet wheel are designed into an integral workpiece as shown in fig. 1 and fig. 2. The design brings many problems to the manufacture and the use of the ratchet wheel, namely 1, the processing technology is complex, and the manufacturing cost is high; 2. the coaxiality precision grade of the ratchet wheel is improved, and the required equipment investment is large; 3. in the production of the hub, when the specification of the ratchet wheel is changed, the ratchet wheel body can not be replaced; 4. because the force that the ratchet barrel portion and the ratchet tooth portion suffer from in the wheel hub is different in magnitude, for the ratchet that adopts aluminium material, although the ratchet weight is lightened, the ratchet tooth portion is damaged by the pawl impact easily in use; for the ratchet wheel made of iron material, although the tooth part of the ratchet wheel is not easy to be damaged in use, the manufacturing process is complex, the manufacturing cost is high, and the weight of the ratchet wheel is heavy, so that the lightening of a vehicle is not facilitated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to: the split type bicycle hub ratchet wheel has the advantages that the damage of the ratchet is avoided, the production process is simplified, the production cost is reduced, the coaxiality precision grade of the ratchet wheel is improved, the weight of the ratchet wheel is reduced, and the ratchet wheel bodies of different specifications can be changed in production.
In order to achieve the purpose, the invention adopts the technical scheme that: in order to make the tooth part and the cylinder part of the ratchet wheel have different strength and simplify the production process of the ratchet wheel, the ratchet wheel adopts a split structure and comprises a ratchet wheel cylinder and a ratchet wheel tooth disc seat.
In order to make a ratchet barrel can with ratchet tooth dish seat, bicycle sprocket, bearing and fender interconnect, a ratchet barrel's design is the tubular structure, is equipped with on its shell with bicycle sprocket cooperation be connected a N vertical recess, the inner chamber sets up to: one end is provided with an internal thread hole connected with the ratchet wheel gear plate seat, the other end is provided with an installation cavity for installing the shaft stop, and the middle part is a connecting part connected with the bearing.
In order to connect the ratchet wheel tooth plate seat with the ratchet wheel cylinder and to be capable of rotating with the ratchet wheel and the pawl in a matching way, the structure design of the ratchet wheel tooth plate seat is as follows: one end of the metal component is provided with external threads connected with the ratchet barrel, the other end of the metal component is provided with gear teeth matched with the ratchet pawl to rotate, a cylindrical convex part matched and connected with the hub shell is arranged between the two ends, and the center of the metal component is provided with a shaft hole matched with the axle.
In order to enable the ratchet wheel tooth part to bear the huge impact force of the pawl without damage, the gear teeth can be designed into special-shaped teeth or N evenly-distributed concave notch teeth, and can also be designed into multi-regular-edge teeth.
In order to lighten the ratchet and reduce the cost, the ratchet cylinder can be made of aluminum alloy sections or metal alloy materials.
In order to keep the ratchet strength, the ratchet tooth disc seat is made of metal alloy materials.
The method for manufacturing the split type bicycle hub ratchet wheel is characterized by mainly comprising the following steps of:
a. manufacturing a ratchet wheel cylinder:
extrusion molding: manufacturing a cylindrical aluminum profile bar with the cross section of which is provided with N longitudinal grooves in appearance by an extrusion molding mode through aluminum;
cutting and blanking: cutting a cylindrical aluminum alloy section bar into raw material cylindrical blocks;
machining the numerical control machine tool: processing an internal thread hole at one end of the raw material cylinder block, processing the middle of the raw material cylinder block into a connecting part for mounting a bearing, and processing the other end of the raw material cylinder block into a cavity for mounting a shaft stop so as to form a ratchet cylinder;
electroplating treatment: electroplating the ratchet wheel cylinder to form a layer of metal film on the surface of the ratchet wheel cylinder;
grinding, namely grinding the inner cavity of the coated ratchet barrel to ensure that the inner cavity precision reaches the use level;
b. manufacturing a ratchet wheel tooth disc seat:
material selection and blanking: cutting a cylindrical metal bar material for manufacturing the ratchet wheel tooth disc seat into block materials;
cold forging treatment: cold forging and forming the block material to form a ratchet fluted disc blank;
and (3) heat treatment: quenching and tempering the blank to improve the hardness of the blank and reduce the size error of thermal expansion and cold contraction after machining in the machining process;
machining the numerical control machine tool: processing a convex part of the formed blank into a cylindrical convex part, processing a gear tooth at one end, processing an external thread at the other end and processing a shaft hole at a central hole to form a ratchet wheel gear plate seat;
surface treatment: electroplating the ratchet barrel to form a metal film on the surface of the ratchet barrel.
c. Assembling:
when in use, the ratchet barrel 1 is connected with the ratchet wheel gear plate seat 2, and the ratchet wheel can be assembled.
The invention has the beneficial effects that: the split type design is adopted, so that the ratchet barrel and the ratchet wheel disk seat are produced and manufactured, the production process is simplified, the production cost is reduced, and under the condition of the same production equipment, the precision grade of the coaxiality of the ratchet wheel is improved, 2, the ratchet barrel in the ratchet wheel body is made of aluminum materials, the weight and the cost of the ratchet wheel are reduced, the ratchet wheel disk seat in the ratchet wheel body is still made of iron materials, the strength of the ratchet wheel is not changed, 3, the ratchet wheel body is composed of the ratchet barrel and the ratchet wheel disk seat, so that the middle ratchet wheel bodies with different specifications can be obtained by changing the ratchet wheel disk seat in the production process of the hub, the ratchet wheel has replaceability, and the production cost is also reduced.
Drawings
FIG. 1 is a schematic structural view of a one-piece bicycle hub ratchet used in a hub;
FIG. 2 is a schematic structural view of an integral bicycle hub ratchet;
FIG. 3 is a schematic structural view of a split type bicycle hub ratchet of the present invention in use on a hub;
FIG. 4 is a perspective view of a split type bicycle hub ratchet wheel split structure according to the present invention;
FIG. 5 is a perspective view of another split type bicycle hub ratchet wheel split structure according to the present invention.
Description of reference numerals: the ratchet wheel comprises a ratchet wheel cylinder 1, a ratchet wheel disc seat 2, a shell 11, a longitudinal groove 11-1, an inner cavity 12, an internal threaded hole 12-1, a connecting part 12-2, an installation cavity 12-3, external threads 21, gear teeth 22, a cylindrical convex part 23, a shaft hole 24, the gear teeth 22, regular hexagonal teeth 22-1 and concave notch teeth 22-2.
Detailed description of the preferred embodiments
Referring to fig. 3 to 4, the split type bicycle hub ratchet structure provided by the invention adopts a split design and consists of a ratchet barrel 1 and a ratchet wheel gear seat 2, wherein the ratchet barrel 1 is made of an aluminum alloy material or a metal alloy material; the ratchet wheel fluted disc seat 2 is made of metal alloy materials.
The design of a ratchet barrel 1 is a barrel-type structure, N longitudinal grooves 11-1 which are matched and connected with a bicycle chain wheel are arranged on a shell 11 of the ratchet barrel, and an inner cavity 12 is internally provided with: one end is provided with an internal thread hole 12-1 connected with the ratchet wheel fluted disc seat 2, the middle is provided with a connecting part 12-2 connected with the bearing, and the other end is provided with an installation cavity 12-3 for installing a shaft stop.
The ratchet wheel gear plate seat 2 is structurally designed into a metal component, one end of the metal component is provided with an external thread 21 connected with the ratchet wheel cylinder 1, the other end of the metal component is provided with a gear tooth 22 matched with the pawl to rotate, a cylindrical convex part 23 matched and connected with the hub shell is arranged between the two ends of the metal component, the center of the metal component is provided with a shaft hole 24 matched with an axle, and the gear tooth 22 is designed into a regular hexagon tooth 22-1.
FIG. 5 is another split bicycle hub ratchet configuration of the present invention wherein the gear teeth 22 are designed as N evenly spaced notched teeth 22-2.
The above-mentioned method for preparing a split type bicycle hub ratchet mainly comprises the following steps:
a. manufacturing a ratchet barrel 1:
extrusion molding: manufacturing a cylindrical aluminum profile bar with the cross section of which is provided with N longitudinal grooves in appearance by an extrusion molding mode through aluminum;
cutting and blanking: cutting a cylindrical aluminum alloy section bar into raw material cylindrical blocks;
machining the numerical control machine tool: processing an internal thread hole 12-1 at one end of a raw material cylinder block, processing the middle of the raw material cylinder block into a connecting part 12-2 for mounting a bearing, and processing the other end of the raw material cylinder block into a cavity 12-3 for mounting a shaft stop, so that the ratchet cylinder 1 is formed;
electroplating treatment: electroplating the ratchet barrel 1 to form a layer of metal film on the surface;
and (3) grinding, namely grinding the inner cavity of the coated ratchet barrel 1 to enable the inner cavity precision to reach the use level.
b. Manufacturing a ratchet wheel tooth disc seat 2:
material selection and blanking: cutting a cylindrical metal bar material for manufacturing the ratchet wheel tooth disc seat 2 into block materials;
cold forging treatment: cold forging and forming the block material to form a ratchet fluted disc 2 blank;
and (3) heat treatment: quenching and tempering the blank to improve the hardness of the blank and reduce the size error of thermal expansion and cold contraction after machining in the machining process;
machining the numerical control machine tool: processing a cylindrical convex part 23 on the convex part of the formed blank, processing a gear tooth 22 on one end, processing an external thread 21 on the other end and processing a shaft hole 24 in a central hole to form the ratchet gear disc seat 2;
surface treatment: electroplating the ratchet wheel cylinder to form a layer of metal film on the surface of the ratchet wheel cylinder;
c. assembling:
when in use, the ratchet barrel 1 is connected with the ratchet wheel gear plate seat 2, and the ratchet wheel can be assembled.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A split type bicycle hub ratchet wheel is characterized in that: the ratchet wheel comprises a ratchet wheel cylinder (1) and a ratchet wheel gear plate seat (2) connected with the ratchet wheel cylinder (1), wherein the ratchet wheel cylinder (1) is designed into a cylinder structure; the ratchet wheel tooth disc seat (2) is a metal component.
2. The split bicycle hub ratchet of claim 1, wherein: be equipped with on shell (11) of a ratchet section of thick bamboo (1) with a bicycle sprocket cooperation be connected N vertical recess (11-1), inner chamber (12) set up to: one end of the ratchet wheel gear plate is provided with an internal thread hole (12-1) connected with the ratchet wheel gear plate seat (2), the middle part of the ratchet wheel gear plate is provided with a bearing connecting part (12-2) connected with a bearing, and the other end of the ratchet wheel gear plate is provided with an installation cavity (12-3) for installing a shaft stop;
one end of the ratchet wheel gear plate seat (2) is provided with an external thread (21) connected with the ratchet wheel cylinder (1), the other end of the ratchet wheel gear plate seat is provided with a gear tooth (22) matched and rotated with the pawl, a cylindrical convex part (23) matched and connected with the hub shell is arranged between the two ends, and the center of the cylindrical convex part is provided with a shaft hole (24) matched with the axle.
3. The split bicycle hub ratchet of claim 2, wherein: the gear teeth (22) can be designed into special-shaped teeth (22-1) or N uniformly-distributed notch teeth (22-2), and can also be designed into multi-regular-edge teeth.
4. The split bicycle hub ratchet of claim 1, wherein: the ratchet barrel (1) can be made of aluminum alloy sections or metal alloy materials.
5. The split bicycle hub ratchet of claim 1, wherein: the ratchet wheel fluted disc seat (2) is made of metal alloy materials.
6. The method of making a split bicycle hub ratchet according to any one of claims 1-5, comprising the steps of:
a. manufacturing a ratchet barrel (1):
extrusion molding: manufacturing a cylindrical aluminum profile bar with the cross section of which is provided with N longitudinal grooves in appearance by an extrusion molding mode through aluminum;
cutting and blanking: cutting a cylindrical aluminum alloy section bar into raw material cylindrical blocks;
machining the numerical control machine tool: processing an internal thread hole (12-1) at one end of a raw material cylinder block, processing the middle of the raw material cylinder block into a connecting part (12-2) for mounting a bearing, and processing the other end of the raw material cylinder block into a cavity (12-3) for mounting a shaft stopper so as to form a ratchet cylinder (1);
electroplating treatment: electroplating the ratchet wheel cylinder to form a layer of metal film on the surface of the ratchet wheel cylinder;
grinding, namely grinding the inner cavity of the coated ratchet barrel to ensure that the inner cavity precision reaches the use level;
b. manufacturing a ratchet wheel tooth disc seat (2):
material selection and blanking: cutting a cylindrical metal bar material for manufacturing the ratchet wheel tooth disc seat into block materials;
cold forging treatment: cold forging and forming the block material to form a ratchet fluted disc blank;
and (3) heat treatment: quenching and tempering the blank to improve the hardness of the blank and reduce the size error of thermal expansion and cold contraction after machining in the machining process;
machining the numerical control machine tool: processing a cylindrical convex part (23) on the convex part of the formed blank, processing a gear tooth (22) on one end, processing an external thread (21) on the other end and processing a shaft hole (24) in a central hole to form a ratchet gear disc seat (2);
surface treatment: electroplating the ratchet wheel cylinder to form a layer of metal film on the surface of the ratchet wheel cylinder;
c. assembling:
the ratchet barrel (1) is connected with the ratchet wheel and gear plate seat (2) to form the ratchet wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009742.6A CN113070636A (en) | 2020-01-06 | 2020-01-06 | Split type bicycle hub ratchet wheel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009742.6A CN113070636A (en) | 2020-01-06 | 2020-01-06 | Split type bicycle hub ratchet wheel and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113070636A true CN113070636A (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010009742.6A Pending CN113070636A (en) | 2020-01-06 | 2020-01-06 | Split type bicycle hub ratchet wheel and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1517174A (en) * | 2003-01-17 | 2004-08-04 | 谢智庆 | Manufucturing method of notch wheel having 90-180 teeth and notch wheel made by gaid method |
| TW201018533A (en) * | 2008-11-05 | 2010-05-16 | Nexxt Alloy Ind Co Ltd | Method for manufacturing ratchet sleeve of bicycle |
| JP2013067286A (en) * | 2011-09-22 | 2013-04-18 | Ntn Corp | Bicycle hub unit, power-assisted bicycle using the same, and two-wheeled electric vehicle |
| CN209833239U (en) * | 2019-04-01 | 2019-12-24 | 传诚技研有限公司 | Rear wheel hub structure |
| CN211759578U (en) * | 2020-01-06 | 2020-10-27 | 雅瑟斯精密机械(江苏)有限公司 | Split type bicycle hub ratchet |
-
2020
- 2020-01-06 CN CN202010009742.6A patent/CN113070636A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1517174A (en) * | 2003-01-17 | 2004-08-04 | 谢智庆 | Manufucturing method of notch wheel having 90-180 teeth and notch wheel made by gaid method |
| TW201018533A (en) * | 2008-11-05 | 2010-05-16 | Nexxt Alloy Ind Co Ltd | Method for manufacturing ratchet sleeve of bicycle |
| JP2013067286A (en) * | 2011-09-22 | 2013-04-18 | Ntn Corp | Bicycle hub unit, power-assisted bicycle using the same, and two-wheeled electric vehicle |
| CN209833239U (en) * | 2019-04-01 | 2019-12-24 | 传诚技研有限公司 | Rear wheel hub structure |
| CN211759578U (en) * | 2020-01-06 | 2020-10-27 | 雅瑟斯精密机械(江苏)有限公司 | Split type bicycle hub ratchet |
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