CN220786042U - Bicycle crank convenient for disassembly, assembly and maintenance - Google Patents
Bicycle crank convenient for disassembly, assembly and maintenance Download PDFInfo
- Publication number
- CN220786042U CN220786042U CN202322700058.4U CN202322700058U CN220786042U CN 220786042 U CN220786042 U CN 220786042U CN 202322700058 U CN202322700058 U CN 202322700058U CN 220786042 U CN220786042 U CN 220786042U
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- China
- Prior art keywords
- crank
- main body
- hole
- boss
- square hole
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Links
- 238000012423 maintenance Methods 0.000 title claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 210000000078 claw Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Steering Devices For Bicycles And Motorcycles (AREA)
Abstract
The utility model discloses a bicycle crank convenient to assemble, disassemble and maintain, which belongs to the technical field of bicycles and comprises a crank main body, wherein a small end of the crank main body is provided with a threaded hole for being connected with a pedal in a threaded manner, a large end of the crank main body is provided with a square hole in a penetrating manner, the outer end of the square hole is connected with a round hole, the top of the outer surface of the large end of the crank main body is provided with a large boss, and small bosses are symmetrically arranged below two sides of the large boss; the crank is convenient to detach by the puller, and the middle shaft cannot be damaged when the crank is detached; in addition, the middle shaft mounting hole of the curved groove adopts a square hole structure, so that the crank can be conveniently clamped and mounted.
Description
Technical Field
The utility model relates to the technical field of bicycle machinery, in particular to a bicycle crank convenient to assemble, disassemble and maintain.
Background
Bicycles, also known as bicycles or scooters, are typically two-wheeled small land vehicles.
In seventies and eighties, bicycles are often used as short-distance vehicles, such as students, students are used for learning to get on and off, staff is used as vehicles for working and working, a crank of a traditional bicycle is installed on a central shaft through clamping keys in a locking mode, hammer hammering key columns are required for installation and disassembly of the installation structure, disassembly and assembly of the key columns are difficult and complicated, and for changing the current situation, the bicycle crank convenient to disassemble, assemble and maintain is especially disclosed.
Disclosure of Invention
The utility model aims at solving the existing problems and provides a bicycle crank convenient to assemble, disassemble and maintain.
The utility model is realized by the following technical scheme: the utility model provides a make things convenient for bicycle crank of dismouting maintenance, includes the crank main part, the tip of crank main part sets up the screw hole that is used for threaded connection footboard, the big end of crank main part link up and sets up the square hole, the round hole is connected to the outer end of square hole, the big end surface top of crank main part sets up big boss, big boss both sides below symmetry sets up little boss.
As a further improvement to the scheme, the diagonal length of the cross section of the square hole is smaller than the diameter of the round hole, and the end cap for the locking bolt is submerged in the round hole, so that the outer protruding hanging of the end cap of the bolt during riding of the bicycle is avoided.
As a further improvement to the scheme, a transition round body is arranged between the large boss and the outer surface of the crank main body, the structure is adopted to ensure the reliability of connection between the large boss and the large end of the crank main body, and cracks are avoided between the edges of the large boss and the crank main body.
As a further improvement to the scheme, the large bosses and the symmetrically arranged small bosses are uniformly distributed on the crank main body outside the round hole, so that the three-jaw puller can conveniently pull out the large end of the crank main body from the end part of the center shaft.
Compared with the prior art, the utility model has the following advantages: the crank is convenient to detach by the puller, and the middle shaft cannot be damaged when the crank is detached; in addition, the middle shaft mounting hole of the curved groove adopts a square hole structure, so that the crank can be conveniently clamped and mounted.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic view of the mounting structure of the crank body.
FIG. 3 is a schematic end view of the bottom bracket.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1-3, a bicycle crank convenient to assemble, disassemble and maintain comprises a crank main body 1, wherein a small end of the crank main body 1 is provided with a threaded hole 2 for being connected with a pedal in a threaded manner, a large end of the crank main body 1 is communicated with a square hole 3, the outer end of the square hole 3 is connected with a round hole 4, the top of the outer surface of the large end of the crank main body 1 is provided with a large boss 6, and two sides of the large boss 6 are symmetrically provided with small bosses 5.
As a further improvement to the scheme, the diagonal length of the cross section of the square hole 3 is smaller than the diameter of the round hole 4, and the end cap for the locking bolt 10 is submerged in the round hole 4, so that the outer protruding hanging of the end cap of the bolt during riding of the bicycle is avoided.
As a further improvement to the scheme, a transition round body 7 is arranged between the large boss 6 and the outer surface of the crank main body 1, the structure is adopted to ensure the reliability of connection between the large boss 6 and the large end of the crank main body 1, and cracks are prevented from being generated between the edge of the large boss 6 and the crank main body 1.
As a further improvement to the scheme, the large bosses 6 and the symmetrically arranged small bosses 5 are uniformly distributed on the crank main body 1 outside the round hole 4, so that the three-jaw puller can conveniently pull out the large end of the crank main body 1 from the end part of the middle shaft.
A method for dismounting and mounting a bicycle crank convenient to dismount and mount and maintain comprises the following steps: the bolts at the end part of the center shaft are disassembled firstly, then three pulling claws of a three-claw pulling horse are respectively hung at the rear sides of a large boss 6 and small bosses 5 at two sides, then the screw rod ends of the three-claw pulling horse are propped against the outer end of the center shaft, and the three pulling claws are pulled out of the crank main body 1 from a square column 9 at the end part of the center shaft by rotating the screw rods of the three-claw pulling horse.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (3)
1. The utility model provides a make things convenient for bicycle crank of dismouting maintenance, includes the crank main part, its characterized in that, the tip of crank main part sets up the screw hole that is used for threaded connection footboard, the big end of crank main part link up and sets up the square hole, and the round hole is connected to the outer end of square hole, the big end surface top of crank main part sets up big boss, and big boss both sides below symmetry sets up little boss.
2. The bicycle crank of claim 1, wherein the diagonal length of the cross section of the square hole is smaller than the diameter of the round hole.
3. The bicycle crank of claim 1, wherein a transition round body is arranged between the large boss and the outer surface of the crank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322700058.4U CN220786042U (en) | 2023-10-09 | 2023-10-09 | Bicycle crank convenient for disassembly, assembly and maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322700058.4U CN220786042U (en) | 2023-10-09 | 2023-10-09 | Bicycle crank convenient for disassembly, assembly and maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220786042U true CN220786042U (en) | 2024-04-16 |
Family
ID=90662047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322700058.4U Active CN220786042U (en) | 2023-10-09 | 2023-10-09 | Bicycle crank convenient for disassembly, assembly and maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220786042U (en) |
-
2023
- 2023-10-09 CN CN202322700058.4U patent/CN220786042U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |