CN216634215U - Portable bicycle crank puller - Google Patents
Portable bicycle crank puller Download PDFInfo
- Publication number
- CN216634215U CN216634215U CN202123274639.3U CN202123274639U CN216634215U CN 216634215 U CN216634215 U CN 216634215U CN 202123274639 U CN202123274639 U CN 202123274639U CN 216634215 U CN216634215 U CN 216634215U
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- bolt
- crank
- main body
- bicycle
- ejector rod
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Abstract
The utility model discloses a portable bicycle crank puller, which comprises a main body (1) and a bolt ejector rod (2), wherein the main body (1) is formed by a large bolt (3), a 17mm outer hexagon (4), a 15mm outer hexagon (5) and a threaded hole (6), and the bolt ejector rod (2) is formed by an ejector head (7), a full-tooth bolt (8) and a 6mm inner hexagon (9).
Description
Technical Field
The utility model relates to a bicycle tool, in particular to a puller tool used for a square hole or small spline bicycle crank.
Background
The existing bicycle in the market uses square hole crank and little spline crank mostly now, because simple and practical, low in manufacturing cost cause historical most use, lead to guaranteeing the use amount on the market very huge, nevertheless because less aperture causes the atress more concentrated, including the difference of different producer's quality, installation technique, the pine takes off or the wearing and tearing phenomenon often appears, and the maintenance is dismantled and is needed to use bicycle crank code pulling instrument. The small spline crank is formed by improving a square hole crank, an original square hole is changed into a larger circular spline hole, the contact area is increased, the strength is improved, tools used for disassembling the small spline crank are basically the same as the square hole crank, only the top part of the bolt ejector rod is larger, and a slightly larger top sleeve or top piece is added to the top part of the bolt ejector rod of the square hole crank puller generally, so that the small spline crank can be disassembled. The bicycle crank puller generally comprises a bolt ejector rod and a main body, the main body is screwed into a bicycle crank when the crank is disassembled, an outer hexagonal column body is arranged on the main body and can be used by being matched with a non-national standard 16mm wrench generally, and since the wrench is rare, a manufacturer can generally match a special wrench, after the main body of the bicycle crank puller is screwed into the bicycle crank, the bolt ejector rod is screwed into a threaded hole of the main body, the bolt ejector rod is tightened by the special wrench matched with the manufacturer or an 1/2 square head winch, the ejector head of the bolt ejector rod is used for ejecting a bicycle central shaft core, and the generated reaction force enables the crank to be loosened from the bicycle central shaft core. The square hole crank and the square hole middle shaft are easy to buy accessories all over the world, and the cost is low, so the square hole crank and the square hole middle shaft are popular with manufacturers and are a good choice for long-distance riders. However, the possibility of failure is relatively easy, so that it is necessary to carry a corresponding maintenance tool for long-distance riding, the bicycle crank puller is relatively heavy, and a special wrench is also required to be carried, so that the carrying is very inconvenient.
Disclosure of Invention
In order to solve the above problems, the present invention provides a portable bicycle crank puller, which is light, easy to carry, and can be used with a conventional wrench without using a special wrench.
In order to achieve the purpose, the utility model provides a portable bicycle crank puller, which is realized by the following steps: the main body of the bicycle crank puller is provided with a hexagonal column of 15mm and 17mm, and a 15mm wrench which is most commonly used in bicycle maintenance and a metric 17mm wrench which is commonly used in China can be used; the full tooth bolt of bolt ejector pin allen and top constitute, can be in the whole screw in crank of bolt ejector pin draws the main part of sign indicating number instrument to accomplish shorter littleer lighter, the allen of bolt ejector pin is the 6mm specification, and the cooperation uses in the bicycle maintenance 6mm allen key most commonly used just can. Therefore, when the bicycle is ridden outdoors, only a light crank puller needs to be carried, and the bicycle crank can be conveniently detached.
Because the utility model adopts a light structure and the specification of a more easily matched tool, the following beneficial effects are obtained: the portable bicycle is convenient to carry, can work by being matched with common bicycle tools, and reduces the weight and the volume of the carrying tools.
Drawings
The utility model is further illustrated by the following examples in conjunction with the drawings.
FIG. 1 is an overall schematic view of the present invention;
in the figure, (1) a main body, (2) a bolt ejector rod, (3) a big bolt, (4) a 17mm external hexagon, (5) a 15mm external hexagon, (6) a threaded hole, (7) a top, (8) a full-tooth bolt, and (9) a 6mm internal hexagon.
Detailed Description
As shown in figure 1, the preferred embodiment of the utility model is composed of a main body (1) and a bolt ejector rod (2), wherein the main body (1) is composed of a large bolt (3), a 17mm external hexagon body (4), a 15mm external hexagon body (5) and a threaded hole (6), and the bolt ejector rod (2) is composed of an ejector head (7), a full-tooth bolt (8) and a 6mm internal hexagon (9). The threaded hole (6) of the main body (1) is suitable for screwing the bolt ejector rod (2), 17mm outer hexagons (4) and 15mm outer hexagons (5) correspondingly use 17mm and 15mm wrenches, and the large bolt (3) is suitable for being screwed into a square hole crank or a small spline crank of a bicycle. Bolt ejector pin (2) can be through full tooth bolt (8) in the whole screw in main part (1) of screw hole (6), and the top of bolt ejector pin (2) is 6mm allen key (9), is fit for using 6mm allen key, and top (7) of bolt ejector pin (2) are used for withstanding well axle core when tearing open the crank, and the reaction force that produces when tightening up through 6mm allen key separates main part (1) and crank together from the axle core.
Essential technical features of the utility model common to the closest prior art in terms of shape, construction and combination thereof are: bicycle crank puller.
The technical features of the utility model, in terms of shape, construction and combination thereof, which differ from the closest prior art are: the bicycle crank puller can be matched with two types of more conventional wrenches for use.
The working principle and the working process of the utility model are as follows: the bolt ejector rod comprises a main body (1) and a bolt ejector rod (2), wherein the main body (1) is formed by a large bolt (3), a 17mm outer hexagon (4), a 15mm outer hexagon (5) and a threaded hole (6), and the bolt ejector rod (2) is formed by an ejector head (7), a full-tooth bolt (8) and a 6mm inner hexagon (9). The threaded hole (6) of the main body (1) is suitable for screwing the bolt ejector rod (2), 17mm and 15mm outer hexagons (4) and 15mm outer hexagons (5) correspondingly use 17mm and 15mm wrenches, and the large bolt (3) is suitable for being screwed into a square hole crank or a small spline crank of a bicycle and is screwed in or out by using the 17mm or 15mm wrench. Bolt ejector pin (2) can be through full tooth bolt (8) in the whole screw in main part (1) of screw hole (6), and the top of bolt ejector pin (2) is 6mm allen key (9), is fit for using 6mm allen key, and top (7) of bolt ejector pin (2) are used for withstanding well axle core when tearing open the crank, and the reaction force that produces when tightening up through 6mm allen key separates main part (1) and crank together from the axle core. The 17mm wrench is one of the most common tools for domestic and civil use and can be found easily, and the 15mm wrench and the 6mm hexagon socket wrench are one of the most common tools for bicycle maintenance and are usually equipped for long-distance riding or motorcade traveling, so that the most common square hole crank or small spline crank can be disassembled only by additionally carrying a small-sized wrench.
The best scheme for realizing the utility model is as follows: the utility model is made of metal materials, and the existing industrial equipment is utilized for batch production, thereby achieving the practical value and the economic value of the utility model.
Claims (2)
1. The utility model provides a portable bicycle crank draws a yard instrument, contains main part (1) and bolt ejector pin (2), its characterized in that, main part (1) comprises big bolt (3), the outer hexagon of 17mm (4), the outer hexagon of 15mm (5), screw hole (6) jointly, and bolt ejector pin (2) comprises top (7), full tooth bolt (8), 6mm interior hexagonal (9) jointly, and screw hole (6) of main part (1) are fit for bolt ejector pin (2) screw in.
2. The portable bicycle crank puller tool according to claim 1, wherein 17mm and 15mm outer hexagons (4) and (5) of the main body (1) correspond to 17mm and 15mm wrenches, a large bolt (3) is suitable for being screwed into a square hole crank or a small spline crank of a bicycle, a bolt ejector rod (2) can be screwed into the main body (1) through a threaded hole (6) through a full-tooth bolt (8), a 6mm inner hexagon (9) is arranged at the top of the bolt ejector rod (2) and is suitable for being used with a 6mm inner hexagon wrench, a top head (7) of the bolt ejector rod (2) is used for propping against a central shaft core when the crank is detached, and the main body (1) and the crank together are separated from the central shaft core through a reaction force generated when the 6mm inner hexagon wrench is tightened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123274639.3U CN216634215U (en) | 2021-12-24 | 2021-12-24 | Portable bicycle crank puller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123274639.3U CN216634215U (en) | 2021-12-24 | 2021-12-24 | Portable bicycle crank puller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216634215U true CN216634215U (en) | 2022-05-31 |
Family
ID=81744356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123274639.3U Active CN216634215U (en) | 2021-12-24 | 2021-12-24 | Portable bicycle crank puller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216634215U (en) |
-
2021
- 2021-12-24 CN CN202123274639.3U patent/CN216634215U/en active Active
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| GR01 | Patent grant | ||
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