CN203172836U - Right crank throw assembly of bicycle - Google Patents
Right crank throw assembly of bicycle Download PDFInfo
- Publication number
- CN203172836U CN203172836U CN 201320070227 CN201320070227U CN203172836U CN 203172836 U CN203172836 U CN 203172836U CN 201320070227 CN201320070227 CN 201320070227 CN 201320070227 U CN201320070227 U CN 201320070227U CN 203172836 U CN203172836 U CN 203172836U
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- China
- Prior art keywords
- right crank
- axis
- bicycle
- diameter
- end portion
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- Expired - Lifetime
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Abstract
Provided is a right crank throw assembly of a bicycle. The right crank throw assembly of the bicycle comprises a right crank, a crankset and a center shaft. The right crank and the crankset are fixed together, an inner insection through hole is formed in the right crank, the center shaft is composed of a first end portion, a second end portion and a shaft body arranged between the first end portion and the second end portion, axial insections are machined on the outer surface of the first end portion and the outer surface of the second end portion of the center shaft, the diameter of the outer surface of each insection of the first end portion is larger than that of the shaft body, the first end portion of the center shaft is connected with the inner insection through hole formed in the right crank in a matched mode, a location hole which can be matched with a location piece is formed in the inner side of the right crank, and a ring-shaped groove is formed in the location hole. The right crank throw assembly of the bicycle can avoid the phenomenon that trouser legs of a cyclist are hooked by protrusions or are stained by the protrusions on the end portions of the center shaft in riding, and is simple in structure and low in manufacturing cost.
Description
Technical field
The utility model relates to a kind of bicycle crank assembly, especially relates to a kind of right crank assembly of bicycle.
Background technology
In the prior art, on the underframe of cycle frame pedal assembly is installed, this pedal assembly includes left and right body of crank, and an end of each body of crank is fixedly connected with pedal, and the other end is fixed on the extended axis of underframe.For each side that supports this rotationally, between axle and underframe, be provided with bearing assembly at this underframe.The preceding sprocket wheel of bicycle is fixed on the right side body of crank that drives cycle chain.Before sprocket wheel need with back sprocket wheel secured in alignment, thereby make things convenient for the work of bicycle.Therefore, axis needs very accurately to be fixed on the underframe.In general, axis is installed in the tube-like piece by bearing assembly, switching device with screw thread outer peripheral face is arranged on a side of tube-like piece, is threaded in the screw thread inner peripheral surface of underframe, makes like this horizontal position of axle is screwed into how many decisions of underframe by switching device.But because conv must arrange the various horizontal position that enough length just can be held axle, thereby cause the part of switching device outer peripheral face to expose, make this part that corrosion or contamination by dust can take place, the cycle that causes replacing shortens greatly on the one hand, be fixed on the tube-like piece owing to the beam warp bearing assembly on the other hand, being that needs are whole in replacing replaces, thereby makes cost increase greatly.Chinese patent ZL03120212.8 discloses the right crank assembly of a kind of bicycle, be provided with the projection that exceeds axis spline tooth outer round surface at axis one end, and projection made the outside that enough makes it to be positioned underframe greatly, in order to lean against on the outer surface of the right body of crank of bicycle, prevent from that right body of crank from turning left to move axially.Axially movable location is the end cap on the body of crank of keeping left and right body of crank is turned right.Like this, though can solve the problem that the axis horizontal position is regulated, because the projection of axis one end protrudes from the outer face of right crank throw mounting hole and is positioned at the outside of underframe, make troubles to the user, and the axial location of axis need finish with two elements, and structure is complicated.
Summary of the invention
The purpose of this utility model can make the right crank assembly of the axis one end bicycle concordant and simple in structure with right crank throw mounting hole outer face in order to overcome the defective that above-mentioned prior art exists and provide a kind of.
The purpose of this utility model can be achieved through the following technical solutions:
The right crank assembly of a kind of bicycle, comprise right crank, chain wheel and axis, right crank and chain wheel are fixed together, right crank is provided with has interior groove through hole, and axis is made of first end, the second end and the axis body between first end and the second end; The first end of described axis and the outside face of the second end are processed with axial groove, and the groove outer surface diameter of described first end is greater than the diameter of axis body; Described axis first end matches with the interior groove through hole that described crank is offered and is connected; Be provided with the knock hole that can match with spacer in the inboard of described right crank, be provided with annular groove in the described knock hole.
Compared with prior art, because shaft end is not established greater than the projection of its groove surface diameter and is located with axial and right crank outside face in of the present utility model, but make the knock hole of axis and right crank inside face realize its axial location by spacer, shaft end is concordant with right crank outside face in making, this can prevent that not only dust or grease pickup are at the bossing of axis, and then pollute rider's trouser legs, but also can avoid by bike the time because of in easy Tibetan dirt rider's the trouser legs of making dirty of projection of shaft end.The utility model adopts spacer to match with the knock hole of right crank inboard, can reach the axis purpose of axial location to the left or to the right, and simple in structure, low cost of manufacture.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structure for amplifying scheme drawing at A place among Fig. 1;
Fig. 3 is decomposition texture scheme drawing of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The utility model comprises right crank 1, chain wheel 2 and axis 3, and right crank and chain wheel are fixed together by rivet.Crank 1 is provided with has interior groove through hole 4, and axis 1 is made of first end 5, the second end 6 and the axis body between first end and the second end 7.The first end 5 of described axis and the outside face of the second end 6 are processed with axial groove, and the groove outer surface diameter of described first end 5 is greater than the diameter of axis body.Described first end 5 matches with the interior groove through hole that described crank 1 is offered and is connected.Be provided with the knock hole 9 that can match with spacer 8 in the inboard of described right crank 1, be provided with annular groove 10 in the described knock hole 9.Spacer 8 is annular slice, and its external diameter is greater than the diameter of the interior groove through hole 4 of right crank 1, and the diameter of bore of spacer is slightly larger than the diameter of axis axis body 7, and the groove outer surface diameter of described axis the second end 6 is suitable with the diameter of axis body 7.For being conducive to distortion, spacer (8) adopts aluminium or aluminum alloy materials to make.
The right crank assembly of bicycle is at first put into axis 2 the groove through hole 4 of right crank 1 when assembling, aim at behind the groove axis first end 5 is depressed into right crank install outward the surface concordant till.Then the second end 6 of spacer 8 from axis is inserted in to first end 5, by instrument spacer 8 is pressed in the knock hole 9 with right crank 1 inboard, and constantly exert pressure, cause spacer 8 distortion, one end of its deformation enters in the annular groove 10, till the other end of spacer 8 and right crank 1 inner surface are roughly concordant.Because the distortion of spacer 8, the some of its deformation is clamp-oned in the annular groove 10 in the knock hole 9, another part of its deformation then squeezes the transition position that is against axis first end 5 and axis body 7, axis 3 is closely cooperated with right crank 1 is in the same place, realize the axial location of axis and right crank 1, and mutually concordant with the end of axis because of the outside face of right crank 1, be conducive to improve the entire combination effect of product.
More than describe is to further specifying that the utility model is done in conjunction with the specific embodiment and accompanying drawing.But; the utility model obviously can be implemented with multiple other method that is different from this description; those skilled in the art can promote, deduce according to actual condition of service under the situation of the utility model content; therefore, the content of above-mentioned specific embodiment should not limit the protection domain that the utility model is determined.
Claims (3)
1. the right crank assembly of a bicycle, comprise right crank (1), chain wheel (2) and axis (3), right crank and chain wheel are fixed together, described right crank (1) is provided with the through hole (4) with interior groove, described axis (3) is by first end (5), the second end (6) and the axis body between first end and the second end (7) constitute, the outside face of the first end of described axis (5) and the second end (6) is processed with axial groove, the groove outer surface diameter of described first end (5) is greater than the diameter of axis body (7), described axis first end (5) matches with the interior groove through hole (4) that described crank (1) is offered and is connected, it is characterized in that: be provided with the knock hole (9) that can match with spacer (8) in the inboard of described right crank (1), be provided with annular groove (10) in the described knock hole (9).
2. the right crank assembly of bicycle according to claim 1, it is characterized in that, spacer (8) is annular slice, its external diameter is greater than the diameter of the interior groove through hole (4) of right crank (1), the diameter of bore of described spacer is slightly larger than axis body (7) diameter of axis, and the diameter of the groove outer surface diameter of described axis the second end (6) and axis body (7) is suitable.
3. bicycle crank assembly according to claim 1 and 2 is characterized in that, right crank (1) is fixed together by rivet with chain wheel (2), and spacer (8) adopts aluminium or aluminum alloy materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070227 CN203172836U (en) | 2013-02-06 | 2013-02-06 | Right crank throw assembly of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070227 CN203172836U (en) | 2013-02-06 | 2013-02-06 | Right crank throw assembly of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203172836U true CN203172836U (en) | 2013-09-04 |
Family
ID=49069578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320070227 Expired - Lifetime CN203172836U (en) | 2013-02-06 | 2013-02-06 | Right crank throw assembly of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203172836U (en) |
-
2013
- 2013-02-06 CN CN 201320070227 patent/CN203172836U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |
|
| CX01 | Expiry of patent term |