Improved bicycle driving side rear fork piece axle fixing structure

Abstract

The utility model relates to the technical field of bicycle axle fixing structures, and discloses an improved bicycle driving side rear fork piece axle fixing structure which comprises a component body, the main body structure of the component body is of an integrally-formed structure, and a first rear fork frame is welded to the upper end face of the component body; a second rear fork frame is welded to the lower end face of the component body. The component body is provided with an accessory hole, a curved surface groove, a barrel shaft bracket and a tail hook limiter; the barrel shaft frame is located at the lower right corner of the component body, and a barrel shaft assembly is connected into the barrel shaft frame through a bearing. The thickness of the barrel shaft assembly is larger than that of the component body. And the horizontal height of the barrel shaft bracket is lower than that of the component body. The improved bicycle rear fork structure is specially designed to be matched with a metal bicycle frame, so that the metal bicycle frame is quickly matched with a UDH tail hook structure and a 12 MM barrel shaft structure, and even if the bicycle frame is finished, different barrel shaft threads can be selected for replacement, so that the production cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle wheel axle fixing structures, and particularly to an improved bicycle drive side rear fork piece wheel axle fixing structure. Background Technique

[0002] In general, the tail hook part on the drive side of a bicycle is not universal, and a special design for the tail hook part is required; for general ones such as the tail hook of SRAM Company in the United States, a special design and matching are needed, and the overall cost is relatively high, and it is more suitable for carbon fiber frames; due to the material characteristics of carbon fiber frames, it can better adapt to this designed tail hook to achieve more stable fixation and better performance; however, for metal frames, this designed tail hook may face compatibility problems during the production process, such as difficult installation and poor fastening effect, resulting in being unfriendly to the production of metal frames and unable to meet their usage requirements;

[0003] In view of this, we propose an improved bicycle drive side rear fork piece wheel axle fixing structure, aiming to solve the above problems. This improved structure will be optimized according to the characteristics of metal frames to ensure compatibility and stability with metal frames, while reducing production costs and meeting market demands. Content of the Utility Model

[0004] The purpose of the utility model is to provide an improved bicycle drive side rear fork piece wheel axle fixing structure to solve the problem that the existing bicycle drive side rear fork piece wheel axle fixing structure cannot be adapted to metal frames as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: It includes a component body, the main structure of the component body is an integrally formed structure, and a first rear fork frame is welded to the upper end surface of the component body; a second rear fork frame is welded to the lower end surface of the component body; a fitting hole, a curved surface groove, a thru-axle bracket and a tail hook limit are arranged on the component body; the thru-axle bracket is located at the lower right corner of the component body, and a thru-axle assembly is connected by bearings inside the thru-axle bracket; the thickness of the thru-axle assembly is greater than the thickness of the component body; the horizontal height of the thru-axle bracket is lower than the horizontal height of the component body.

[0006] Adopting the above technical solution is convenient for improving the compatibility between the component body and the metal frame, improving the convenience and fastening effect of installation; at the same time, through the integrally formed component body, the production cost can be reduced.

[0007] As a preferred technical solution of the utility model, the fitting hole is located at the right end of the component body; the left side of the component body is in an arc surface structure; the curved surface groove is located at the center of the component body, and the inner end surface on the left side of the curved surface groove is provided with an arc surface smaller than the radian of the component body.

[0008] Adopting the above technical solution facilitates further optimization of the structure of the component body. In addition, the design of the arc surface structure helps to disperse stress and improve the strength and durability of the component body.

[0009] As a preferred technical solution of the present utility model, the tail hook limit is located at the lower end of the component body, and the tail hook limit is located at the left end of the barrel shaft bracket; the tail hook limit is higher than the horizontal height of the component body.

[0010] Adopting the above technical solution, when the bicycle chain falls off from the rear flywheel, it will be hooked by the tail hook limit 7, ensuring that the chain will not interfere with the frame during movement, thus avoiding potential wear problems.

[0011] As a preferred technical solution of the present utility model, the component body is engaged with a UDH tail hook through the barrel shaft bracket and the barrel shaft assembly.

[0012] Adopting the above technical solution prevents the problem of non - universality of the tail hook part, enabling this structure to be applicable to various bicycle designs and improving universality.

[0013] As a preferred technical solution of the present utility model, the UDH tail hook is installed inside the component body.

[0014] Adopting the above technical solution facilitates further optimization of the installation position of the UDH tail hook, ensuring its stability inside the frame and at the same time reducing the impact of the tail hook on the appearance of the frame.

[0015] As a preferred technical solution of the present utility model, the rear end face of the UDH tail hook is rotationally connected to a wheel assembly, and the first rear fork, the second rear fork, the component body, the barrel shaft assembly, and the UDH tail hook are all symmetrically arranged with respect to the wheel assembly.

[0016] Adopting the above technical solution facilitates the realization of the balance and symmetry of the overall structure, thereby improving the stability and controllability of the bicycle.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: This improved bicycle rear fork structure is specially designed to be adapted to a metal frame, enabling the metal frame to quickly match the UDH tail hook structure and the 12MM barrel shaft structure. Even after the frame is completed, different barrel shaft threads can be selected for replacement, thus effectively reducing the production cost; at the same time, it also improves the installation convenience, provides additional accessory installation slots, and enhances the playability of the entire bicycle; it can be widely applied to various types of metal - frame bicycles, providing more choices and conveniences for manufacturers and consumers.

[0018] The component body serves as the main body of the entire structure, ensuring the strength and stability of the structure through an integrally formed manner; the first rear fork and the second rear fork are respectively welded to the upper end face and the lower end face of the component body, providing a stable support point for the wheel assembly; the accessory holes are provided to facilitate the installation of other bicycle accessories, such as a braking system or a transmission assembly, while the curved surface grooves prevent stress concentration on the component body; the thickness of the thru-axle assembly is greater than that of the component body, ensuring sufficient strength to withstand the torque generated during riding.

[0019] The derailleur hanger limit is located at the lower end of the component body. When the bicycle chain falls off from the rear sprocket, it will be hooked by the derailleur hanger limit, ensuring that the chain will not interfere with the frame during movement, thus avoiding potential wear problems. Description of the Drawings

[0020] Figure 1 It is a front view structural schematic diagram of the component body of the present utility model;

[0021] Figure 2 It is a connection structural schematic diagram of the component body of the present utility model with the first rear fork and the second rear fork;

[0022] Figure 3 It is a top view structural schematic diagram of the component body of the present utility model;

[0023] Figure 4 It is a bottom view structural schematic diagram of the component body of the present utility model;

[0024] Figure 5 It is a connection structural schematic diagram of the component body of the present utility model with the UDH derailleur hanger and the wheel assembly;

[0025] Figure 6 Of the present utility model Figure 5 The enlarged structural schematic diagram at position A;

[0026] Figure 7 It is a first rear view angle structural schematic diagram of the component body of the present utility model;

[0027] Figure 8 It is a first side view three-dimensional angle structural schematic diagram of the component body of the present utility model;

[0028] Figure 9 It is a second side view three-dimensional angle structural schematic diagram of the component body of the present utility model;

[0029] Figure 10 It is a second rear view angle structural schematic diagram of the component body of the present utility model;

[0030] Figure 11 It is a side view structural schematic diagram of the component body of the present utility model.

[0031] In the figure: 1. First rear fork; 2. Second rear fork; 3. Component body; 4. Fitting hole; 5. Curved surface groove; 6. Axle holder; 7. Derailleur hanger stop; 8. Axle assembly; 9. Wheel assembly; 10. UDH derailleur hanger. Detailed implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-11 , the technical solution of the present invention: an improved bicycle drive-side rear fork wheel axle fixing structure, including a component body 3. The main structure of the component body 3 is an integrally formed structure, and a first rear fork 1 is welded to the upper end surface of the component body 3; a second rear fork 2 is welded to the lower end surface of the component body 3; a fitting hole 4, a curved surface groove 5, an axle holder 6 and a derailleur hanger stop 7 are provided on the component body 3; the axle holder 6 is located at the lower right corner of the component body 3, and an axle assembly 8 is connected to the axle holder 6 by a bearing; the thickness of the axle assembly 8 is greater than the thickness of the component body 3; the horizontal height of the axle holder 6 is lower than the horizontal height of the component body 3, which is convenient for improving the compatibility between the component body 3 and the metal frame, and improving the convenience and fastening effect of installation; at the same time, through the integrally formed component body 3, the production cost can be reduced;

[0034] The fitting hole 4 is located at the right end of the component body 3; the left side of the component body 3 is in an arc surface structure; the curved surface groove 5 is located at the center of the component body 3, and the inner end surface on the left side of the curved surface groove 5 is provided with an arc surface smaller than the radian of the component body 3, which is convenient for further optimizing the structure of the component body 3. In addition, the design of the arc surface structure helps to disperse stress and improve the strength and durability of the component body 3;

[0035] The derailleur hanger stop 7 is located at the lower end of the component body 3, and the derailleur hanger stop 7 is located at the left end of the axle holder 6; the derailleur hanger stop 7 is higher than the horizontal height of the component body 3. When the bicycle chain falls off the rear sprocket, it will be caught by the derailleur hanger stop 7, ensuring that the chain will not interfere with the frame during movement, thereby avoiding potential wear problems;

[0036] The component body 3 is engaged with a UDH derailleur hanger 10 through the axle holder 6 and the axle assembly 8, preventing the non-universality problem of the UDH derailleur hanger 10 part, making the structure applicable to a variety of bicycle designs and improving the universality;

[0037] The UDH tail hook 10 is installed inside the component body 3, which facilitates further optimization of the installation position of the UDH tail hook 10, ensures its stability inside the frame, and reduces the impact of the UDH tail hook 10 on the appearance of the frame;

[0038] The rear end face of the UDH tail hook 10 is rotatably connected to the wheel assembly 9, and the first rear fork 1, the second rear fork 2, the component body 3, the thru-axle assembly 8, and the UDH tail hook 10 are all symmetrically arranged with respect to the wheel assembly 9, which facilitates achieving the balance and symmetry of the overall structure, thereby improving the stability and controllability of the bicycle;

[0039] Working principle: The component body 3 serves as the main body of the entire structure, ensuring the strength and stability of the structure through the integral molding method; the first rear fork 1 and the second rear fork 2 are respectively welded to the upper end face and the lower end face of the component body 3, providing a stable support point for the wheel assembly 9; the setting of the accessory hole 4 facilitates the installation of other bicycle accessories, such as a braking system or a transmission assembly, while the curved surface groove 5 prevents stress concentration on the component body 3; the thickness of the thru-axle assembly 8 is greater than the thickness of the component body 3, ensuring sufficient strength to withstand the torque generated during riding;

[0040] The tail hook limit 7 is located at the lower end of the component body 3. When the bicycle chain falls off from the rear sprocket, it will be hooked by the tail hook limit 7, ensuring that the chain will not interfere with the frame during movement, thereby avoiding potential wear problems.

[0041] Through the thru-axle bracket 6 and the thru-axle assembly 8, the UDH tail hook 10 and the rear derailleur rotate when impacted, absorbing the impact to protect the frame and the paint, thereby absorbing part of the impact force and protecting the frame from damage.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved bicycle driving side rear fork wheel axle fixing structure, comprising a component body (3), characterized in that: The main structure of the component body (3) is an integrally formed structure, and a No. 1 rear fork frame (1) is welded to the upper end surface of the component body (3); a No. 2 rear fork frame (2) is welded to the lower end surface of the component body (3); the component body (3) is provided with an accessory hole (4), a curved groove (5), a barrel axle frame (6) and a tail hook limiter (7); the barrel axle frame (6) is located at the lower right corner of the component body (3), and a barrel axle assembly (8) is connected to the inner bearing of the barrel axle frame (6); the thickness of the barrel axle assembly (8) is greater than the thickness of the component body (3); and the horizontal height of the barrel axle frame (6) is lower than the horizontal height of the component body (3).

2. The improved bicycle driving side rear fork wheel axle fixing structure according to claim 1, characterized in that: The accessory hole (4) is located at the right end of the component body (3); the left side of the component body (3) is in an arc structure; the curved groove (5) is located at the center of the component body (3), and the inner end surface of the left side of the curved groove (5) is provided with an arc surface having a smaller arc than the component body (3).

3. The improved bicycle driving side rear fork wheel axle fixing structure according to claim 2, characterized in that: The tail hook limiter (7) is located at the lower end of the component body (3), and the tail hook limiter (7) is located at the left end of the barrel shaft frame (6); the tail hook limiter (7) is higher than the horizontal height of the component body (3).

4. The improved bicycle driving side rear fork wheel axle fixing structure according to claim 3, characterized in that: The component body (3) is engaged with a UDH tail hook (10) via the barrel axle frame (6) and the barrel axle assembly (8).

5. The improved bicycle driving side rear fork wheel axle fixing structure according to claim 4, characterized in that: The UDH tail hook (10) is installed on the inner side of the component body (3).

6. The improved bicycle driving side rear fork wheel axle fixing structure according to claim 5, characterized in that: The rear end surface of the UDH tail hook (10) is rotatably connected to a wheel assembly (9), and the No. 1 rear fork frame (1), the No. 2 rear fork frame (2), the component body (3), the barrel axle assembly (8) and the UDH tail hook (10) are all symmetrically arranged with respect to the wheel assembly (9).

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