Metallic cover and ec crank connection fixing structure

Abstract

The utility model discloses metal protective cover and EC crank connecting fixed structure, including EC crank, EC crank includes the analog buckle part for fixing metal protective cover, analog buckle part includes the metal protective cover fixed ring platform of setting on EC crank, the below of metal protective cover fixed ring platform is provided with the matching analog buckle part push -in arc -shaped groove, and the fixed recess of cooperation analog buckle part forms metal protective cover fast push -in fixed structure, and metal protective cover fixed ring platform has the upward uplift gradient.

Description

Technical Field

[0001] This utility model relates to mechanical parts, and more particularly to bicycle sprockets and their components. Specifically, it relates to a metal cover and an EC crank connection and fixing structure. Background Technology

[0002] Currently, there are the following problems when fixing the metal cover to the EC crank: Fasteners are required for fixing: Traditional fixing methods usually require the use of fasteners such as screws and nuts, which increases material costs and assembly time; Assembly is relatively complicated: using fasteners for fixing requires multiple steps, such as aligning the holes and tightening the screws, which makes the assembly process complicated and time-consuming; High cost: The high labor costs in the procurement and assembly of fasteners lead to an increase in overall costs; Complex assembly structure: In some cases, specialized locking tools or pressing pressure equipment may be required, which further increases the complexity of the equipment and operation; Therefore, it is necessary to provide a metal cover and EC crank connection and fixing structure to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a structure for connecting and fixing a metal cover to an EC crank.

[0004] The technical solution is as follows: A metal cover and EC crank connection and fixing structure includes an EC crank, the EC crank includes a simulated snap-fit ​​part for fixing the metal cover, the simulated snap-fit ​​part includes a metal cover fixing annular platform disposed on the EC crank, and a matching simulated snap-fit ​​part push-in arc groove is disposed below the metal cover fixing annular platform, which cooperates with the simulated snap-fit ​​part fixing groove to form a quick push-in fixing structure for the metal cover.

[0005] Furthermore, the metal cover fixing ring platform has an upward slope.

[0006] Furthermore, the upward slope is 1-2°.

[0007] Furthermore, the front end of the metal cover fixing ring platform has a push-in connecting ramp, and the push-in connecting ramp is connected to a push-in connecting steep ramp.

[0008] Furthermore, a ramp is pushed in for rapid loading of the fixing port of the metal cover, with a slope of 30-45°.

[0009] Furthermore, the steep slope is pushed into the arc-shaped groove to simulate the buckle part, and the metal cover is pushed into the upward slope and the fixed groove of the simulated buckle part to form a simulated buckle fixing part.

[0010] Furthermore, the slope of the steep slope should be no less than 60°.

[0011] Compared with the prior art, this utility model can realize the quick connection of the metal cover to the EC crank without the need for traditional fastener fixing methods. It has high assembly efficiency, good assembly quality, and facilitates the control of production costs. Attached Figure Description

[0012] Figure 1 This is one of the structural schematic diagrams of this utility model.

[0013] Figure 2 This is the second structural schematic diagram of this utility model.

[0014] Figure 3 This is the third structural schematic diagram of this utility model.

[0015] Figure 4 This is the fourth structural schematic diagram of this utility model. Detailed Implementation

[0016] Example:

[0017] Please see Figure 1-4 This embodiment demonstrates a metal cover and EC crank connection and fixing structure, including an EC crank 1. The EC crank 1 includes a simulated snap-fit ​​part 2 for fixing the metal cover 3. The simulated snap-fit ​​part includes a metal cover fixing annular platform 21 disposed on the EC crank. A matching simulated snap-fit ​​part push-in arc groove 22 is disposed below the metal cover fixing annular platform 21, which cooperates with the simulated snap-fit ​​part fixing groove 23 to form a quick push-in fixing structure for the metal cover.

[0018] The metal cover fixing ring platform 21 has an upward slope.

[0019] The upward slope is 1-2°.

[0020] The front end of the metal cover fixing ring platform 21 has a push-in connecting ramp 4, and the push-in connecting ramp is connected to a push-in connecting steep ramp 5.

[0021] The push-in connecting ramp 4 is used for the rapid loading of the fixing port 31 of the metal cover 3, with a slope of 30-45°.

[0022] Pushing in the steep slope 5, in conjunction with the simulated buckle part, pushes the metal cover into the arc-shaped groove, pushing it into the upward slope and the simulated buckle part fixing groove to form a simulated buckle fixing part.

[0023] The slope of the steep slope 5 should be no less than 60°.

[0024] Compared with the prior art, this utility model can realize the quick connection of the metal cover to the EC crank without the need for traditional fastener fixing methods. It has high assembly efficiency, good assembly quality, and facilitates the control of production costs.

[0025] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A metal cover and EC crank connection and fixing structure, characterized in that: The device includes an EC crank, which includes a simulated snap-fit ​​part for fixing a metal cover. The simulated snap-fit ​​part includes a metal cover fixing annular platform disposed on the EC crank. A matching simulated snap-fit ​​part push-in arc groove is disposed below the metal cover fixing annular platform, which, together with the simulated snap-fit ​​part fixing groove, forms a quick-push-in fixing structure for the metal cover. The metal cover fixing ring platform has an upward slope.

2. The metal cover and EC crank connection and fixing structure according to claim 1, characterized in that: The upward slope is 1-2°.

3. The metal cover and EC crank connection and fixing structure according to claim 1, characterized in that: The front end of the metal cover fixing ring platform has a push-in connection ramp, which is connected to a push-in connection steep ramp.

4. The metal cover and EC crank connection and fixing structure according to claim 3, characterized in that: The push-in connecting ramp is used for the rapid loading of the fixing port of the metal cover, with a slope of 30-45°.

5. The metal cover and EC crank connection and fixing structure according to claim 3 or 4, characterized in that: Pushing in the steep slope, the simulated buckle part is pushed into the arc-shaped groove, and the metal cover is pushed into the upward slope and the simulated buckle part fixing groove to form a simulated buckle fixing part.

6. The metal cover and EC crank connection and fixing structure according to claim 5, characterized in that: The slope of the push into the steep slope shall not be less than 60°.

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