CN216805711U - Sprocket crank that possesses telescopic machanism - Google Patents
Sprocket crank that possesses telescopic machanism Download PDFInfo
- Publication number
- CN216805711U CN216805711U CN202220273302.6U CN202220273302U CN216805711U CN 216805711 U CN216805711 U CN 216805711U CN 202220273302 U CN202220273302 U CN 202220273302U CN 216805711 U CN216805711 U CN 216805711U
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- crank
- rod
- groove
- sprocket
- strip
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- 210000001503 joint Anatomy 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a chain wheel crank with a telescopic mechanism, which comprises a crank, a connecting rod and a chain wheel, wherein the crank comprises a crank rod A, a crank rod B, a clamping groove A, a positioning hole, a clamping strip A and a positioning bolt, the clamping strip A is fixedly connected to the left side of the crank rod A, the clamping groove A is formed in the outer surface of the crank rod B, the clamping strip A is clamped in the clamping groove A in a matched mode, the positioning hole is formed in the clamping groove A, the positioning bolt is installed on the clamping strip A, and the central disc is fixedly connected to the left side of the crank rod B. This kind of sprocket crank that possesses telescopic machanism goes into draw-in groove A inside through card strip A card, then carries out preliminary butt joint with crank lever A and crank lever B, and positioning bolt passes behind the locating hole of different positions corresponding model nut of screwing at its end, accomplishes the equipment then to the crank and fixes, the scalable regulation of the whole length of crank, and the suitability is strong.
Description
Technical Field
The utility model relates to the technical field of chain wheel cranks, in particular to a chain wheel crank with a telescopic mechanism.
Background
Sprocket cranks are used primarily for the foot-driven structure of bicycles.
Patent number CN96116844.7 discloses a crank and sprocket mechanism with high output performance, which is composed of a crank, a crank shaft and a sprocket, and is characterized in that an elliptical fluted disc and a ring-shaped seat with an inner circle radius of more than 2cm and a built-in bearing form a ring-shaped sprocket assembly, and two transmission pins are fixed on the elliptical fluted disc at 180 degrees on two sides of the elliptical fluted disc with relatively small elliptic arc; the circle center of the ring-shaped chain wheel assembly moves downwards relative to the crank shaft and the crank shaft pipe and is arranged at the rear part and is fixedly connected with a chain wheel supporting sleeve frame sleeved on a lower joint pipe of a bicycle beam; the right top of the crank shaft is sleeved with a right crank, the inner side of the crank shaft is fixed with a driven short crank, the right crank and the driven short crank are both provided with a sliding groove on one side surface, and the left end of the crank shaft is provided with a left crank.
At present, the chain wheel crank has the following disadvantages: 1. the length of the crank of the conventional chain wheel crank cannot be adjusted according to actual needs, so that the applicability is insufficient; 2. the chain wheel part of the conventional chain wheel crank is easy to damage after being used for a long time, and the replacement cost is high. To this end, a sprocket crank with a telescopic mechanism is proposed.
Disclosure of Invention
The utility model mainly aims to provide a chain wheel crank with a telescopic mechanism, wherein a clamping strip A is clamped into a clamping groove A, then a crank rod A and a crank rod B are subjected to preliminary butt joint, a positioning bolt penetrates through positioning holes at different positions and then screws a nut of a corresponding type at the tail end of the positioning bolt, then the crank is assembled and fixed, the overall length of the crank can be telescopically adjusted, the applicability is strong, and the problem in the background technology can be effectively solved.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a sprocket crank that possesses telescopic machanism, includes the crank, still includes connecting rod and sprocket, the crank includes crank rod A, crank rod B, draw-in groove A, locating hole, card strip A and positioning bolt, crank rod A left side fixedly connected with card strip A, draw-in groove A has been seted up to crank rod B surface, card strip A cooperation joint is inside draw-in groove A, the locating hole has been seted up to draw-in groove A inside, install positioning bolt on the card strip A, crank rod B left side fixedly connected with center plate, the connecting rod includes body of rod A, card strip B, body of rod B, equipment bolt, draw-in groove B and equipment hole.
Furthermore, the outer side wall of the central disc is fixedly connected with a rod body A, and one side of the rod body A is fixedly connected with a clamping strip B; the rod body A and the clamping strip B are fixed with each other.
Further, a rod body B is fixedly connected to the inner side wall of the chain wheel, a clamping groove B is formed in the outer surface of the rod body B, and the clamping strip B is clamped in the clamping groove B in a matched mode; through going into the draw-in groove B that body of rod B surface was seted up with card strip B cooperation card inside, carry out preliminary butt joint with body of rod B and body of rod A then.
Furthermore, an assembling hole is formed in the clamping groove B; the assembly bolt on the clamping strip B just passes through the assembly hole.
Further, an assembling bolt is mounted on the clamping strip B; and the assembling bolt penetrates through the assembling hole and then screws a nut of a corresponding type at the tail end of the assembling bolt, and then the connecting rod is assembled and fixed.
Compared with the prior art, the crank length adjusting device has the following beneficial effects that 1, the crank length adjusting device is clamped into the clamping groove A through the clamping strip A, then the crank rod A and the crank rod B are subjected to preliminary butt joint, the positioning bolt penetrates through the positioning holes at different positions and then screws the nuts with corresponding models at the tail end of the positioning bolt, then the crank is assembled and fixed, the overall length of the crank can be adjusted in a telescopic mode, the applicability is high, and the problems that the length of the crank of the conventional chain wheel crank cannot be adjusted according to actual needs and the applicability is insufficient are solved; 2. inside the draw-in groove B that body of rod B surface was seted up is gone into to the card strip B cooperation card, then carry out preliminary butt joint with body of rod B and body of rod A, the equipment bolt position on the card strip B just passes the equipment hole, the equipment bolt passes and corresponds the model nut at its end after the equipment hole is screwed, it is fixed to accomplish the equipment to the connecting rod then, wholly make things convenient for the split, then be convenient for replace the sprocket, solved in the past sprocket articulate sprocket position for a long time use damage easily, the problem of replacement cost height.
Drawings
Fig. 1 is a schematic view of the overall structure of a sprocket crank with a telescopic mechanism according to the present invention.
Fig. 2 is a schematic structural view of a rod body B of a sprocket crank with a telescopic mechanism according to the present invention.
Fig. 3 is a schematic structural view of a crank lever B of a sprocket crank with a telescopic mechanism according to the present invention.
In the figure: 1. a crank; 101. a crank lever A; 102. a crank lever B; 103. a clamping groove A; 104. positioning holes; 105. a clamping strip A; 106. positioning the bolt; 2. a central disk; 3. a connecting rod; 301. a rod body A; 302. a clamping strip B; 303. a rod body B; 304. assembling the bolts; 305. a clamping groove B; 306. assembling holes; 4. a sprocket.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.
As shown in fig. 1-3, a sprocket crank with a telescopic mechanism comprises a crank 1, a connecting rod 3 and a sprocket 4, wherein the crank 1 comprises a crank rod a101, a crank rod B102, a clamping groove a103, a positioning hole 104, a clamping strip a105 and a positioning bolt 106, the clamping strip a105 is fixedly connected to the left side of the crank rod a101, the clamping groove a103 is formed in the outer surface of the crank rod B102, the clamping strip a105 is clamped in the clamping groove a103 in a matching manner, the positioning hole 104 is formed in the clamping groove a103, the positioning bolt 106 is mounted on the clamping strip a105, a central disc 2 is fixedly connected to the left side of the crank rod B102, and the connecting rod 3 comprises a rod body a301, a clamping strip B302, a rod body B303, an assembling bolt 304, a clamping groove B305 and an assembling hole 306.
The outer side wall of the central disc 2 is fixedly connected with a rod body A301, and one side of the rod body A301 is fixedly connected with a clamping strip B302; the rod body A301 and the clamping strip B302 are fixed with each other.
A rod body B303 is fixedly connected to the inner side wall of the chain wheel 4, a clamping groove B305 is formed in the outer surface of the rod body B303, and the clamping strip B302 is clamped in the clamping groove B305 in a matched mode; the clamping strip B302 is clamped into the clamping groove B305 formed in the outer surface of the rod body B303 in a matched mode, and then the rod body B303 is in preliminary butt joint with the rod body A301.
An assembly hole 306 is formed in the clamping groove B305; the assembly bolt 304 on the snap strip B302 is positioned just through the assembly hole 306.
Wherein, an assembling bolt 304 is arranged on the clamping strip B302; the assembling bolt 304 passes through the assembling hole 306 and then the nut of the corresponding type is screwed at the tail end thereof, thereby completing the assembling and fixing of the connecting rod 3.
The utility model is a chain wheel crank with a telescopic mechanism, when in work, the chain wheel crank is clamped into a clamping groove A103 through a clamping strip A105, then a crank rod A101 and a crank rod B102 are preliminarily butted, a positioning bolt 106 passes through positioning holes 104 at different positions and then nuts of corresponding types are screwed at the tail end of the positioning bolt, then the crank 1 is assembled and fixed, the whole length of the crank 1 can be telescopically adjusted, the applicability is strong, and the problems that the crank length of the conventional chain wheel crank cannot be adjusted according to actual needs and the applicability is insufficient are solved; inside the draw-in groove B305 that body of rod B303 surface was seted up is gone into to the cooperation card of strip B302, then carry out preliminary butt joint with body of rod B303 and body of rod A301, equipment bolt 304 position on the card strip B302 just passes equipment hole 306, equipment bolt 304 passes and corresponds the model nut at its end after equipment hole 306 is screwed, then accomplish the equipment to connecting rod 3 and fix, wholly make things convenient for the split, then be convenient for replace the sprocket, the problem that sprocket position of sprocket crank used in the past used easily to damage for a long time, replacement cost is high is solved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a sprocket crank that possesses telescopic machanism, includes crank (1), its characterized in that: still include connecting rod (3) and sprocket (4), crank (1) includes crank lever A (101), crank lever B (102), draw-in groove A (103), locating hole (104), card strip A (105) and positioning bolt (106), crank lever A (101) left side fixedly connected with card strip A (105), draw-in groove A (103) have been seted up to crank lever B (102) surface, inside card strip A (105) cooperation joint in draw-in groove A (103), locating hole (104) have been seted up to draw-in groove A (103) inside, install positioning bolt (106) on card strip A (105), crank lever B (102) left side fixedly connected with center plate (2), connecting rod (3) are including the body of rod A (301), card strip B (302), the body of rod B (303), assembly bolt (304), draw-in groove B (305) and assembly hole (306).
2. The sprocket crank with a telescopic mechanism according to claim 1, wherein: the outer side wall of the central disc (2) is fixedly connected with a rod body A (301), and one side of the rod body A (301) is fixedly connected with a clamping strip B (302).
3. The sprocket crank with a telescopic mechanism according to claim 1, wherein: sprocket (4) inside wall fixedly connected with body of rod B (303), draw-in groove B (305) have been seted up to body of rod B (303) surface, inside draw-in groove B (305) cooperation joint of card strip B (302).
4. The sprocket crank with a telescopic mechanism according to claim 1, wherein: an assembling hole (306) is formed in the clamping groove B (305).
5. The sprocket crank with a telescopic mechanism according to claim 1, wherein: and an assembling bolt (304) is arranged on the clamping strip B (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220273302.6U CN216805711U (en) | 2022-02-10 | 2022-02-10 | Sprocket crank that possesses telescopic machanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220273302.6U CN216805711U (en) | 2022-02-10 | 2022-02-10 | Sprocket crank that possesses telescopic machanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216805711U true CN216805711U (en) | 2022-06-24 |
Family
ID=82041657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220273302.6U Expired - Fee Related CN216805711U (en) | 2022-02-10 | 2022-02-10 | Sprocket crank that possesses telescopic machanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216805711U (en) |
-
2022
- 2022-02-10 CN CN202220273302.6U patent/CN216805711U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220624 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |